Carrier Indoor Furnishings 48 50HJ004 014 User Manual

COBRA™ Energy Recovery Units

48/50HJ004-014 with 62AQ060-300

Single-Package Rooftop Units

with Energy Recovery Capability

Installation, Start-Up,

and Service Supplement

SAFETY CONSIDERATIONS

IMPORTANT: This is a supplemental instruction for the

48/50HJ and the 62AQ Installation, Start-Up and Service

Instructions. It is not intended to take the place of either

instruction or to be a complete piece in itself.

Installation and servicing of air-conditioning equipment can

be hazardous due to system pressure and electrical compo-

nents. Only trained and qualified service personnel should

install, repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance func-

tions of cleaning coils and filters and replacing filters. All other

operations should be performed by trained service personnel.

When working on air-conditioning equipment, observe precau-

tions in the literature, tags and labels attached to the unit, and

other safety precautions that apply.

Verify that the power source supplied to the unit matches

the voltages and amperages listed on the unit rating plate.

Follow all safety codes. Wear safety glasses and work

gloves. Use quenching cloth for unbrazing operations. Have

fire extinguishers available for all brazing operations.

CONTENTS

Page

SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . 1

GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29

Step 1 — Inspect Shipment . . . . . . . . . . . . . . . . . . . . . . 2

Step 2 — Provide Unit Support . . . . . . . . . . . . . . . . . . . 2

• ROOF CURB

Step 3 — Field Fabricate Ductwork. . . . . . . . . . . . . . . 3

Step 4 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 6

•

POSITIONING

Step 5 — Install Flue Hood (48HJ Only) . . . . . . . . . 11

Step 6 — Install Gas Piping (48HJ Only). . . . . . . . . 11

Step 7 — Install External Trap for Condensate

Drain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Step 8 — Make Electrical Connections . . . . . . . . . . 11

• FIELD POWER SUPPLY

Disconnect gas piping from unit when leak

testing at pressure greater than ¹/₂psig. Pres-

sures greater than /₂psig will cause gas

valve damage resulting in hazardous condi-

tion. If gas valve is subjected to pressure

• FACTORY-SUPPLIED NON-FUSED

greater than /₂psig, it must be replaced

DISCONNECT

before use. When pressure testing field-

supplied gas piping at pressures of ¹/₂psig or

less, a unit connected to such piping must be

isolated by manually closing the gas valve.

• FIELD CONTROL WIRING

• HEAT ANTICIPATOR SETTINGS

Step 9 — Assemble and Mount

Supply-Air Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Step 10 — Mount the Barometric Relief Damper . . 28

Step 11 — Set the Outdoor Cooling and

Heating Thermostats. . . . . . . . . . . . . . . . . . . . . . . . . . 29

LIGHT COMMERCIAL THERMIDISTAT

Before performing service or maintenance operations on

unit, turn off main power switch to unit and install a lock-

out tag. Electrical shock could cause personal injury.

ACCESSORY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-34

General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Dehumidification Equipment and Connections . . . 30

Step 1 — Select Light Commercial

GENERAL

Thermidistat Location . . . . . . . . . . . . . . . . . . . . . . . . . 30

Step 2 — Set DIP Switches. . . . . . . . . . . . . . . . . . . . . . . 30

Step 3 — Install Light Commercial Thermidistat . . 31

Step 4 — Set Light Commercial Thermidistat

Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Step 5 — Conduct Light Commercial

Carrier’s factory-installed optional COBRA Energy Recov-

ery units precondition ventilation air for the rooftop unit during

winter and summer operation and recover energy from the

building exhaust air. These units are designed to satisfy the

higher ventilation requirements and other building codes while

minimizing energy costs.

Factory installation of the energy recovery section provides

the benefit of reduced field-installation time, single point pow-

er connections, and the assurance of a factory test for the com-

plete COBRA Energy Recovery unit. The energy recovery sec-

tion requires less maintenance than other energy recovery

systems and can be serviced by any qualified refrigeration

technician.

Thermidistat Start-Up and Checkout . . . . . . . . . . . 33

Step 6 — Make Final Settings . . . . . . . . . . . . . . . . . . . . 34

OPERATIONAL INFORMATION . . . . . . . . . . . . . . . . . . 34

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35-37

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 38-41

NOTE: Because of the location of the energy recovery section,

the unit nameplate has been moved to the opposite end of the

rooftop section, on the upper, right-hand part of the panel.

ROOFTOP UNIT AND ENERGY$RECYCLER2

START-UP CHECKLIST. . . . . . . . . . . . . . . . CL-1, CL-2

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 111 Catalog No. 534-80122 Printed in U.S.A. Form 48/50HJ,62AQ-2SIS Pg 1 9-02 Replaces: 48/50HJ,62AQ-1SIS

Book 1

Tab 1a 1b 6a 6b

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Deck pans

2" Return support.

Only used on some

applications.

49 15/16"

78 1/4"

3 1/4

DUCT OPENING SIZES

Supply = 15 11/16" x 31 3/8"

R1 = 15 5/16" x 29 1/16"

R2 = 15 5/16" x 9"

Deck pans

14"

Supply

14"

R1 = Return from building to HVAC

R2 = Return from building to 62AQ

110 11/16"

49 15/16"

SIDE VIEW

END VIEW

Fig. 2B — COBRA™ Energy Recovery Unit Full-Perimeter Roof Curb — 48/50HJ008-014 with 62AQ200,300

If electric control power or gas service is to be routed

through the basepan, a field-installed accessory thru-the-

bottom connection must be used. Attach the accessory to the

basepan per the information in the accessory installation

instructions. Thru-the-bottom connections must be installed

before unit is set on roof.

If the combined unit roof curb is not being used, additional

support may be desired under the energy recovery section of

the unit. An accessory support and pad for the energy recovery

section can be used. See Fig. 4. Place the protective rubber pad

on the roof so that the edge near the unit is located about 6-in.

from the end of the energy recovery section. Measure the

distance from the bottom of energy recovery rails to the pad.

Adjust the energy recovery equipment support to match the

measured distance and screw into place with the 4 screws pro-

vided. See Fig. 4. Place the support underneath the energy re-

covery unit and on the protective rubber pad. This is done by

lifting the end of the energy recovery section slightly above

level and then sliding the support underneath the rails.

Curb should be level. This is necessary for unit condensate

drain to function properly. Refer to Accessory Roof Curb

Installation Instructions for additional information as required.

Step 3 — Field Fabricate Ductwork — Secure all

ducts to roof curb and building structure. Do not connect duct-

work to unit. Insulate and weatherproof all external ductwork,

joints, and roof openings with counter flashing and mastic in

accordance with applicable codes. See Fig. 5A and 5B for duct

dimensions.

Ducts passing through an unconditioned space must be

insulated and covered with a vapor barrier. If a plenum return is

used, the return should be ducted through the roof deck to com-

ply with applicable fire codes.

A minimum clearance is not required around ductwork.

These units are designed for a minimum continuous heating

return-air temperature of 50 F (dry bulb), or an intermittent

operation down to 45 F (dry bulb), such as when used with a

night set-back thermostat. To operate at lower return-air

temperatures, a field-supplied outdoor-air temperature control

must be used to initiate both stages of heat when the tempera-

ture is below 45 F. Indoor comfort may be compromised when

these lower air temperatures are used with insufficient heating

temperature rise.

IMPORTANT: The gasketing of the unit to the roof curb is

critical for a watertight seal. Install gasket supplied with the

roof curb as shown in Fig. 3A and 3B. Improperly applied

gasket can result in air leaks and poor unit performance.

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ROOF CURB

ACCESSORY

CONNECTOR

PKG. ACCY.

CRBTMPWR001A00

CRBTMPWR002A00

D ALT

UNIT SIZE

GAS

POWER

CONTROL

DRAIN HOLE

³/₄″ [19] NPT

1¹/₄″ [31.7]

³/₄″ [19] NPT

³/₄″

¹/₂″

1′-2″

CRRFCURB001A00

CRRFCURB002A00

[356]

48/50HJ

004-007

[19] NPT

[12.7]

1′-9¹¹

″

1′-4″

1³/₄″

2′-0″

¹/₂″

[551¹]⁶[406]

[44.5]

CRBTMPWR003A00

CRBTMPWR004A00

[610]

¹/₂″

[12.7] NPT

³/₄″

[12.7]

1¹/₄″ [31.7]

NOTES:

[19] NPT

1. Roof curb accessory is shipped disassembled.

2. Insulated panels.

3. Dimensions in [ ] are in millimeters.

4. Roof curb: galvanized steel.

5. Attach ductwork to curb (flanges of duct rest on curb).

6. Service clearance: 4 ft on each side.

Direction of airflow.

8. Connector packages CRBTMPWR001A00 and

002A00 are for thru-the-curb type gas. Packages

CRBTMPWR003A00 and 004A00 are for thru-the-

bottom type gas connections.

TO ENSURE AIRTIGHT CONNECTION.

PLACE UNIT AS CLOSE TO THIS

END AS POSSIBLE

TO ENSURE AIRTIGHT CONNECTION.

PLACE UNIT AS CLOSE TO THIS

END AS POSSIBLE

Fig. 3A — Roof Curb Details (48/50HJ004-007 Section Only)

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D ALT

DRAIN

HOLE

ROOF CURB

ACCESSORY

UNIT SIZE

48/50HJ

CONNECTOR

PKG. ACCY.

“A”

GAS

POWER

CONTROL

CRRFCURB003A00 1′-2″ [356]

CRRFCURB004A00 2′-0″ [610]

CRBTMPWR001A00

CRBTMPWR002A00

³/₄″ [19] NPT

1¹/₄″ [31.7]

³/₄″

¹/₂″

008-014

[19] NPT

[12.7] NPT

2′-8⁷/₁₆

″

1′-10¹⁵

″

1³/₄″

¹/₂″

[827]

[583]¹⁶

[44.5]

CRBTMPWR003A00

CRBTMPWR004A00

³/₄″ [19] NPT

NOTES:

¹/₂″

[12.7] NPT

1. Roof curb accessory is shipped disassembled.

2. Insulated panels: 1-in. thick polyurethane foam,

1³/₄lb density.

³/₄″

[12.7] NPT

1¹/₄″ [31.7]

[19] NPT

3. Dimensions in [ ] are in millimeters.

4. Roof curb: 16-gage steel.

5. Attach ductwork to curb (flanges of duct rest on

curb).

6. Service clearance 4 ft on each side.

Direction of airflow.

8. Connector packages CRBTMPWR001A00 and

2A00 are for thru-the-curb gas type. Packages

CRBTMPWR003A00 and 4A00 are for thru-

the-bottom type gas connections.

TO ENSURE AN AIRTIGHT CONNECTION,

PLACE UNIT ON CURB AS CLOSE TO

DUCT END AS POSSIBLE.

TO ENSURE AN AIRTIGHT CONNECTION,

PLACE UNIT ON CURB AS CLOSE TO

DUCT END AS POSSIBLE.

Fig. 3B — Roof Curb Details (48/50HJ008-014 Section Only)

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DIMENSIONS (in.)

EQUIPMENT SUPPORT

PART NUMBER

UNIT SIZE

3-6 Ton

4”

CRAQSUPT001A00

CRAQSUPT002A00

CRAQSUPT003A00

CRAQSUPT004A00

36.9 40 8 to 14

36.9 40 14 to 24

49.7 54 8 to 14

49.7 54 14 to 24

7¹/₂-12¹/₂Ton

HVAC UNIT

ENERGY

RECOVERY

SECTION

C”

SCREW

SUPPORT

IN PLACE

PAD

ADJUSTABLE

EQUIPMENT

SUPPORT

CURB

ROOF

10” x B (SEE CHART)

PROTECTIVE

RUBBER PAD

(EPDM)

Fig. 4 — Supplemental Energy Recovery Section Equipment Support

Unit may be installed directly on wood flooring or on

Class A, B, or C roof-covering material when roof curb is used.

Although unit is weatherproof, guard against water from

higher level runoff and overhangs.

Flue vent discharge must have a minimum horizontal clear-

ance of 4 ft from electric and gas meters, gas regulators, and

gas relief equipment.

Minimum distance between unit and other electrically live

parts is 48 inches.

Step 4 — Rig and Place Unit — Keep unit upright

and do not drop. Spreader bars are not required if top crating is

left on unit. Rollers may be used to move unit across a roof.

Remove the bottom wooden skids that are under the unit by

removing the wooden plates that hold the bottom wooden

frame to the unit. Level by using unit frame as a reference. Lift-

ing holes are provided in base rails as shown in Fig. 6A and 6B.

Refer to rigging instructions on unit.

Flue gas can deteriorate building materials. Orient unit

such that flue gas will not affect building materials. Locate

mechanical draft system flue assembly at least 48 in. from an

adjacent building or combustible material.

Adequate combustion- and ventilation-air space must be

provided for proper operation of this equipment. Be sure that

installation complies with all local codes and Section 5.3, Air

for Combustion and Ventilation, NFGC (National Fuel Gas

Code), and ANSI (American National Standards Institute)

Z223.1, and NFPA (National Fire Protection Association)

54 TIA-54-84-1. In Canada, installation must be in accordance

with the CAN1-B149 installation codes for gas burning

appliances.

All panels must be in place when rigging.

POSITIONING — Maintain clearance around and above unit

to provide minimum distance from combustible materials,

proper airflow, and service access. A properly positioned unit

will have the following clearances between unit and roof curb:

¹/₄-in. clearance between roof curb and base rails on each side

and duct end of unit; /₄-in. clearance between roof curb and

condenser coil end of unit.

Do not install unit in an indoor location. Do not locate unit

air inlets near exhaust vents or other sources of contaminated

air.

Be sure that unit is installed such that snow will not block

the combustion intake or flue outlet.

After unit is in position, remove rigging skids and shipping

materials.

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MAX WEIGHT

890

905

900

915

920

935

995

1010

795

810

805

820

825

840

880

895

in.

847

1070

847

1070

48HJ004 w/62AQ060

48HJ004 w/62AQ100

48HJ005 w/62AQ060

48HJ005 w/62AQ100

48HJ006 w/62AQ060

48HJ006 w/62AQ100

48HJ007 w/62AQ060

48HJ007 w/62AQ100

50HJ004 w/62AQ060

50HJ004 w/62AQ100

50HJ005 w/62AQ060

50HJ005 w/62AQ100

50HJ006 w/62AQ060

50HJ006 w/62AQ100

50HJ007 w/62AQ060

50HJ007 w/62AQ100

404

411

409

415

418

425

452

459

361

368

365

372

375

381

400

407

95.6

2428.20

57.38

1457.30

33.35

42.12

33.35

42.12

Fig. 6A — Rigging Label — COBRA™ Energy Recovery Unit — Sizes 48/50HJ004-007

trap, pitch the line away from the unit at 1-in. per 10-ft of run.

Do not use a pipe smaller than the connection (³/₄-in.).

Step 5 — Install Flue Hood (48HJ Rooftop Sec-

tions Only) — Refer to the 48HJ installation instructions for

information on installing the flue hood.

Step 8 — Make Electrical Connections

Step 6 — Install Gas Piping (48HJ Rooftop Sec-

tions Only) — Refer to the 48HJ installation instructions for

information on installing the gas piping.

Unit cabinet must have an uninterrupted, unbroken electri-

cal ground to minimize the possibility of personal injury if

an electrical fault should occur. This ground may consist of

electrical wire connected to unit ground lug in control com-

partment, or conduit approved for electrical ground when

installed in accordance with NEC (National Electrical

Code), ANSI/NFPA, latest edition, and local electrical

codes. Do not use gas piping as an electrical ground. Fail-

ure to follow this warning could result in the installer being

liable for personal injury of others.

Step 7 — Install External Trap For Condensate

Drain — The condensate from the rooftop unit along with

condensate from the upper coil of the energy recovery section

is internally piped to the condensate pan in the lower section of

the energy recovery section. For this reason, the bottom drain

on the rooftop unit CANNOT be used for a condensate drain.

The ³/₄-in. drain connection on the energy recovery section is

located near the bottom left of the exhaust air section. See

Fig. 5A and 5B. The energy recovery section must have a

field-fabricated, external, P-trap installed for condensate drain-

age. Trap must be at least 4-in. deep to protect against freeze-

up. If the drain line is installed downstream from the external

FIELD POWER SUPPLY — All units except 208/230-v

units are factory wired for the voltage shown on the nameplate.

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MAX WEIGHT

in.

48HJ008 w/62AQ200

48HJ008 w/62AQ300

48HJ009 w/62AQ200

48HJ009 w/62AQ300

48HJ012 w/62AQ200

48HJ012 w/62AQ300

48HJ014 w/62AQ200

48HJ014 w/62AQ300

50HJ008 w/62AQ200

50HJ008 w/62AQ300

50HJ009 w/62AQ200

50HJ009 w/62AQ300

50HJ012 w/62AQ200

50HJ012 w/62AQ300

50HJ014 w/62AQ200

50HJ014 w/62AQ300

1310

1355

1315

1360

1400

1445

1440

1485

1240

1285

1245

1290

1325

1370

1345

1410

595

616

597

618

636

657

655

675

564

584

566

586

602

623

620

641

77.42

1966.5

66.50

1689.10

42.12

50.12

42.12

1070

1273

1070

Fig. 6B — Rigging Label — COBRA™ Energy Recovery Unit — Sizes 48/50HJ008-014

If the 208/230-v unit is to be connected to a 208-v power sup-

ply, the transformer must be rewired by moving the black wire

with the ¹/₄-in. female space connector from the 230-volt con-

nection and moving to the 200-volt ¹/₄-in. male terminal on the

primary side of the transformer.

Refer to unit label diagram for additional information. Pig-

tails are provided for field wire connections. Use factory-

supplied splices or UL (Underwriters’ Laboratories) approved

copper/aluminum connector.

When installing units, provide a disconnect per the NEC.

All field wiring must comply with NEC and local

requirements.

Install field wiring as follows:

1. Install conduit through side panel openings. Install con-

duit between disconnect and control box.

may cause damage to electrical components. Such operation

would invalidate any applicable Carrier warranty.

FACTORY-SUPPLIED NON-FUSED DISCONNECT — The

factory-supplied disconnect is capable of handling disconnect

amps up to 80 A for a COBRA Energy Recovery unit. For dis-

connect amps greater than 80 A, a field-supplied disconnect is

required.

FIELD CONTROL WIRING — Install a Carrier-approved

accessory thermidistat assembly according to installation

instructions included with the accessory. Locate thermidistat as-

sembly on a solid wall in the conditioned space to sense average

temperature in accordance with thermidistat installation instruc-

tions on page 30. Connect thermidistat wires to terminal board.

Route thermidistat cable or equivalent single leads of col-

ored wire from subbase terminals through connector on unit to

low-voltage connections (shown in Fig. 8). Thermidistat con-

trol wiring is routed to both the rooftop unit control box and the

energy recovery section control box.

2. Install power lines to terminal connections as shown in

Fig. 7.

Voltage to compressor terminals during operation must be

within voltage range indicated on unit nameplate (see

Tables 1A-1H). On 3-phase units, voltages between phases must

be balanced within 2% and the current within 10%. Use the for-

mula shown in the legend for Tables 1A-1H, Note 2 to deter-

mine the percent of voltage imbalance. Operation on improper

line voltage or excessive phase imbalance constitutes abuse and

If a PremierLink™ control is used, a thermidistat does not

need to be used. A humidistat and a separate room air sensor

are used. Two extra terminal blocks (TB2 and TB3) are provid-

ed in the control box for all units with PremierLink controls.

No wiring should be directly connected to the PremierLink

control. Wire sensors to TB2 or TB3. Humidistat is wired to

TB1 and energy recovery section control box.

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NOTE: For wire runs up 50 ft, use no. 18 AWG (American Wire

Gage) insulated wire (35 C minimum). For 50 to 75 ft, use no.

16 AWG insulated wire (35 C minimum). For over 75 ft, use no.

14 AWG insulated wire (35 C minimum). All wire larger than

no. 18 AWG cannot be directly connected to the thermostat and

will require a junction box and splice at the thermostat.

Pass the control wires through the hole provided in the cor-

ner post; then feed wires through the raceway built into the

corner post to the 24-v barrier located on the left side of the

control box. See Fig. 10. The raceway provides the UL

required clearance between high- and low-voltage wiring.

NOTE: A humidistat and a temperature sensor can be used in

place of a thermidistat for PremierLink™ units.

HEAT ANTICIPATOR SETTINGS — Set heat anticipator

settings at .14 amp for the first stage and .14 amp for second-

stage heating, when available.

Table 1A — Electrical Data (COBRA™ Energy Recovery 48HJ004-007 Units with 62AQ060)

POWER SUPPLY

DISCONNECT SIZE*

NOMINAL

V-PH-Hz

IFM

TYPE

CONV

OUTLET

62AQ

FLA

UNIT

FUSE OR

MCA

FLA

LRA

HACR BKR

STD

9.2

34.8/34.8

40.8/40.8

40/40

45/45

35/35

41/41

135/135

140/140

208/230-1-60

208/230-3-60

YES

STD

HIGH STATIC

YES

9.2

27.7/27.7

33.7/33.7

28.6/28.6

34.6/34.6

35/35

40/35

35/35

40/40

29/29

34/34

30/30

35/35

124/124

129/129

154/154

158/158

48HJ004

YES

STD

YES

9.2

13.6

16.3

14.0

16.7

STD

460-3-60

HIGH STATIC

YES

STD

9.2

44.4/44.4

50.4/50.4

60/60

44/44

50/50

173/173

178/178

208/230-1-60

208/230-3-60

YES

STD

HIGH STATIC

YES

9.2

31.7/31.7

37.7/37.7

32.6/32.6

38.6/38.6

40/40

45/45

33/33

38/38

34/34

39/39

140/140

145/145

170/170

174/174

48HJ005

YES

STD

YES

9.2

15.2

17.9

15.6

18.3

STD

460-3-60

HIGH STATIC

YES

STD

9.2

55.5/55.5

61.5/61.5

70/70

56/56

61/61

250/250

255/255

208/230-1-60

208/230-3-60

YES

STD

HIGH STATIC

YES

9.2

38.1/38.1

44.1/44.1

39.8/39.8

45.8/45.8

45/45

50/50

45/45

50/50

39/39

44/44

41/41

46/46

202/202

207/207

221/221

226/226

48HJ006

48HJ007

YES

STD

YES

9.2

19.3

22.0

20.1

22.8

101

106

110

115

STD

460-3-60

HIGH STATIC

YES

STD

YES

9.2

42.0/42.0

48.0/48.0

50/50

60/60

42/42

48/48

234/234

239/239

208/230-3-60

HIGH STATIC

YES

9.2

43.7/43.7

49.7/49.7

50/50

60/60

44/44

50/50

253/253

258/258

STD

HIGH STATIC

YES

9.2

19.8

22.5

20.6

23.3

114

118

123

128

460-3-60

YES

LEGEND

Example: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

FLA

—

Full Load Amps

HACR

IFM

Heating, Air Conditioning and Refrigeration

Indoor (Evaporator) Fan Motor

Locked Rotor Amps

LRA

MCA

452 + 464 + 455

Average Voltage =

Minimum Circuit Amps

MOCP — Maximum Overcurrent Protection

NEC

—

National Electrical Code

Underwriters’ Laboratories

1371

*Used to determine minimum disconnect per NEC.

= 457

†Single point box CRSINGLE017A00 is part of base unit.

Determine maximum deviation from average voltage.

(AB) 457 – 452 = 5 v

NOTES:

(BC) 464 – 457 = 7 v

1. In compliance with NEC requirements for multimotor and combination load

equipment (refer to NEC Articles 430 and 440), the overcurrent protective

device for the unit shall be fuse or HACR breaker. UL, Canada units may be

fuse or circuit breaker.

(AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

2. Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is

greater than 2%. Use the following formula to determine the percent of volt-

age imbalance.

% Voltage Imbalance = 100 x

457

= 1.53%

max voltage deviation from average voltage

This amount of phase imbalance is satisfactory as it is below the maximum

allowable 2%.

= 100 x

average voltage

IMPORTANT: If the supply voltage phase imbalance is more than 2%, con-

tact your local electric utility company immediately.

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Table 1B — Electrical Data (COBRA™ Energy Recovery 50HJ004-007 Units with 62AQ060)

HEAT

POWER SUPPLY

SINGLE

POINT BOX

CRSINGLE

---A00

DISCONNECT SIZE*

HEATER

CRHEATER

---A00

NOMINAL

V-PH-Hz

IFM

TYPE

CONV

OUTLET

62AQ

FLA

UNIT

FUSE OR

HACR BKR

FLA

MCA

MOCP

FLA

LRA

NONE

001

—/—

34.8/ 34.8

35.7/ 38.8

45.2/ 49.7

55.1/ 61.2

63.2/ 70.5

74.5/ 83.6

40/40

40/45

50/50

—

35/ 35

35/ 37

43/ 47

52/ 58

60/ 67

70/ 79

135/135

15.9/18.3

23.5/27.1

31.4/36.3

37.9/43.8

46.9/54.2

—

002

—

STD

YES

9.2

003

60/ 70

70/ 80

80/ 90

004

005

004

—

002+002

—

208/230-1-60

NONE

001

—/—

40.8/ 40.8

40.8/ 43.0

50.0/ 53.9

59.9/ 65.4

68.0/ 74.7

79.3/ 87.8

27.7/ 27.7

27.7/ 29.1

32.8/ 35.4

38.5/ 42.0

43.2/ 47.4

57.5/ 64.0

33.7/ 33.7

37.6/ 39.6

43.3/ 46.2

48.0/ 51.6

62.3/ 68.2

28.6/ 28.6

28.6/ 30.0

33.7/ 36.3

39.4/ 42.9

44.1/ 48.3

58.4/ 64.9

45/45

45/50

60/60

—

41/ 41

41/ 42

49/ 52

58/ 63

65/ 71

76/ 83

29/ 29

32/ 34

37/ 40

41/ 45

55/ 60

34/ 34

37/ 39

43/ 45

47/ 50

60/ 65

30/ 30

33/ 35

38/ 41

42/ 46

56/ 62

140/140

124/124

129/129

154/154

15.9/18.3

23.5/27.1

31.4/36.3

37.9/43.8

46.9/54.2

—

002

—

003

60/ 70

70/ 80

80/ 90

004

005

004

—

002+002

—

NONE

001

—/—

35/35

40/40

45/45

45/50

—

40/35

40/40

45/45

50/50

50/60

—

35/35

40/40

45/45

50/50

—

40/40

45/45

50/50

60/60

—

9.2/10.6

13.6/15.6

18.1/20.9

21.9/25.3

33.4/38.5

002

—

STD

003

—

004

—

005

60/ 70

002

NONE

001

—/—

—

9.2/10.6

13.6/15.6

18.1/20.9

21.9/25.3

33.4/38.5

002

—

STD

YES

003

—

004

—

005

70/ 70

002

208/230-3-60

NONE

001

—/—

—

9.2/10.6

13.6/15.6

18.1/20.9

21.9/25.3

33.4/38.5

002

—

HIGH STATIC

003

—

50HJ004

004

—

005

60/ 70

002

NONE

001

—/—

34.6/ 34.6

38.5/ 40.5

44.2/ 47.1

48.9/ 52.5

63.2/ 69.1

—

35/ 35

38/ 40

44/ 46

48/ 51

61/ 66

158/158

9.2/10.6

13.6/15.6

18.1/20.9

21.9/25.3

33.4/38.5

002

—

YES

003

—

004

—

005

70/ 70

003

NONE

006

—

13.6

16.7

20.9

25.0

28.7

16.3

18.8

23.0

27.1

30.8

14.0

17.1

21.3

25.4

29.1

16.7

19.2

23.4

27.5

31.2

—

7.2

STD

YES

9.2

007

10.6

13.8

16.8

—

7.2

10.6

13.8

16.8

—

7.2

10.6

13.8

16.8

—

7.2

10.6

13.8

16.8

008

009

NONE

006

STD

007

008

009

460-3-60

NONE

006

HIGH STATIC

007

008

009

NONE

006

YES

007

008

009

NONE

001

—/—

44.4/ 44.4

55.1/ 61.2

74.5/ 83.6

94.4/106.5

60/60

—

44/ 44

52/ 58

70/ 79

88/100

103/117

173/173

15.9/18.3

31.4/36.3

46.9/54.2

62.8/72.5

—

003

60/ 70

80/ 90

100/110

125/150

004

005

STD

9.2

002+002

003+003

004+004

—

75.8/87.5 110.6/125.2

208/230-1-60

NONE

001

—/—

50.4/ 50.4

59.9/ 65.4

79.3/ 87.8

99.2/110.7

60/60

—

50/ 50

58/ 63

76/ 83

94/104

109/122

178/178

15.9/18.3

31.4/36.3

46.9/54.2

62.8/72.5

—

003

60/ 70

80/ 90

100/125

125/150

004

005

YES

002+002

003+003

004+004

—

75.8/87.5 115.4/129.4

NONE

002

—/—

31.7/ 31.7

32.8/ 35.4

38.5/ 42.0

57.5/ 64.0

70.6/ 79.0

37.7/ 37.7

37.7/ 39.6

43.3/ 46.2

62.3/ 68.2

75.4/ 83.2

32.6/ 32.6

33.7/ 36.3

39.4/ 42.9

58.4/ 64.9

71.5/ 79.9

40/40

45/45

—

33/ 33

33/ 34

37/ 40

55/ 60

67/ 74

38/ 38

38/ 39

43/ 45

60/ 65

72/ 79

34/ 34

34/ 35

38/ 41

56/ 62

68/ 75

140/140

145/145

170/170

13.6/15.6

18.1/20.9

33.4/38.5

43.8/50.5

—

STD

YES

9.2

003

—

60/ 70

80/ 80

—

005

004+004

002

003

—

002

003

—

002

003

—

NONE

002

—/—

40/40

45/45

50/50

—

50HJ005

13.6/15.6

18.1/20.9

33.4/38.5

43.8/50.5

—

003

—

005

70/ 70

80/ 90

004+004

—

208/230-3-60

NONE

002

—/—

40/40

45/45

—

13.6/15.6

18.1/20.9

33.4/38.5

43.8/50.5

—

HIGH STATIC

003

—

005

60/ 70

80/ 80

004+004

—

NONE

002

—/—

38.6/ 38.6

38.6/ 40.5

44.2/ 47.1

63.2/ 69.1

76.3/ 84.1

15.2

16.7

25.0

28.7

42.3

45/45

50/50

—

39/ 39

39/ 40

44/ 46

61/ 66

73/ 80

174/174

13.6/15.6

18.1/20.9

33.4/38.5

43.8/50.5

—

HIGH STATIC

STD

YES

9.2

003

—

70/ 70

80/ 90

—

005

004+004

003

—

NONE

006

—

7.2

13.8

16.8

27.7

—

460-3-60

008

—

009

—

008+008

025

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Table 1B — Electrical Data (COBRA™ Energy Recovery 50HJ004-007 Units with 62AQ060) (cont)

HEAT

FLA

POWER SUPPLY

SINGLE

POINT BOX

CRSINGLE

---A00

DISCONNECT SIZE*

HEATER

CRHEATER

---A00

NOMINAL

V-PH-Hz

IFM

TYPE

CONV

OUTLET

62AQ

FLA

UNIT

FUSE OR

HACR BKR

MCA

MOCP

FLA

LRA

NONE

006

—

17.9

18.8

27.1

30.8

44.4

15.6

17.1

25.4

29.1

42.7

18.3

19.2

27.5

31.2

44.8

—

7.2

STD

YES

9.2

008

13.8

16.8

27.7

—

7.2

13.8

16.8

27.7

—

7.2

—

009

008+008

025

NONE

006

—

50HJ005

(cont)

460-3-60

HIGH STATIC

008

—

009

—

008+008

025

NONE

006

—

025

YES

008

13.8

16.8

27.7

009

008+008

NONE

002

—/—

55.5/ 55.5

59.5/ 65.5

78.9/ 87.9

98.7/110.8

70/70

—

56/ 56

57/ 62

75/ 83

93/104

108/121

250/250

23.5/27.1

31.4/36.3

46.9/54.2

62.8/72.5

70/ 70

80/ 90

100/125

125/150

004

005

003

—

STD

YES

9.2

002+002

003+003

004+004

—

75.8/87.5 115.0/129.6

—

208/230-1-60

NONE

002

—/—

61.5/ 61.5

64.3/ 69.7

83.7/ 92.1

70/70

—

61/ 61

62/ 67

80/ 88

98/109

113/126

39/ 39

42/ 46

56/ 62

68/ 75

81/ 91

44/ 44

48/ 51

61/ 66

73/ 80

86/ 95

41/ 41

44/ 48

58/ 63

70/ 77

83/ 93

46/ 46

50/ 53

63/ 68

75/ 82

88/ 97

255/255

202/202

207/207

221/221

226/226

101

106

23.5/27.1

31.4/36.3

46.9/54.2

70/ 70

90/100

110/125

125/150

004

005

003

—

002+002

003+003

004+004

—

62.8/72.5 103.5/115.0

75.8/87.5 119.8/133.8

—/—

13.6/15.6

21.9/25.3

33.4/38.5

43.8/50.5

55.2/63.8

—

NONE

002

38.1/ 38.1

44.1/ 48.3

58.4/ 64.9

71.5/ 79.9

85.8/ 96.4

44.1/ 44.1

48.9/ 52.5

63.2/ 69.1

76.3/ 84.1

90.6/100.6

39.8/ 39.8

45.9/ 50.1

60.3/ 66.7

73.3/ 81.7

87.6/ 98.3

45.8/ 45.8

50.7/ 54.3

65.1/ 70.9

78.1/ 85.9

92.4/102.5

19.3

25.4

29.1

42.7

46.4

22.0

27.5

31.2

44.8

48.5

45/45

50/50

—

50/50

60/60

—

45/45

50/60

—

50/50

60/60

—

002

003

—

003

—

003

—

003

—

004

005

—

STD

60/ 70

80/ 80

90/100

004+004

004+005

NONE

002

—/—

—

70/ 70

80/ 90

100/110

13.6/15.6

21.9/25.3

33.4/38.5

43.8/50.5

55.2/63.8

004

005

STD

YES

004+004

004+005

50HJ006

208/230-3-60

NONE

002

—/—

—

13.6/15.6

21.9/25.3

33.4/38.5

43.8/50.5

55.2/63.8

—

004

005

—

HIGH STATIC

STD

70/ 70

80/ 90

90/100

004+004

004+005

NONE

002

004

005

004+004

004+005

—/—

—

13.6/15.6

21.9/25.3

33.4/38.5

43.8/50.5

55.2/63.8

YES

70/ 80

80/ 90

100/110

—

NONE

006

—

7.2

13.8

16.8

27.7

30.7

—

7.2

13.8

16.8

27.7

30.7

—

008

009

—

008+008

008+009

025

460-3-60

NONE

006

—

025

008

009

STD

YES

008+008

008+009

LEGEND

Full Load Amps

Example: Supply voltage is 460-3-60.

AB = 452 v

FLA

—

BC = 464 v

HACR

IFM

Heating, Air Conditioning and Refrigeration

Indoor (Evaporator) Fan Motor

Locked Rotor Amps

AC = 455 v

LRA

MCA

MOCP

NEC

452 + 464 + 455

Average Voltage =

Minimum Circuit Amps

Maximum Overcurrent Protection

National Electrical Code

1371

Underwriters’ Laboratories

*Used to determine minimum disconnect per NEC.

= 457

Determine maximum deviation from average voltage.

(AB) 457 – 452 = 5 v

†Single point box CRSINGLE017A00 is part of base unit.

NOTES:

(BC) 464 – 457 = 7 v

1. In compliance with NEC requirements for multimotor and combination load

equipment (refer to NEC Articles 430 and 440), the overcurrent protective device

for the unit shall be fuse or HACR breaker. UL, Canada units may be fuse or cir-

cuit breaker.

(AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

457

2. Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater

than 2%. Use the following formula to determine the percent of voltage

imbalance.

= 1.53%

This amount of phase imbalance is satisfactory as it is below the maximum allow-

able 2%.

max voltage deviation from average voltage

= 100 x

average voltage

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact

your local electric utility company immediately.

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Table 1B — Electrical Data (COBRA™ Energy Recovery 50HJ004-007 Units with 62AQ060) (cont)

HEAT

FLA

POWER SUPPLY

SINGLE

POINT BOX

CRSINGLE

---A00

DISCONNECT SIZE*

HEATER

CRHEATER

---A00

NOMINAL

V-PH-Hz

IFM

TYPE

CONV

OUTLET

62AQ

FLA

UNIT

FUSE OR

HACR BKR

MCA

MOCP

FLA

LRA

NONE

006

—

20.1

26.2

29.9

43.5

47.2

—

110

111

7.2

008

13.8

16.8

27.7

30.7

—

HIGH STATIC

STD

YES

9.2

009

008+008

008+009

—

025

50HJ006

(cont)

460-3-60

NONE

006

—

22.8

28.3

32.0

45.6

49.3

42.0/ 42.0

44.1/ 48.3

58.4/ 64.9

71.5/ 79.9

85.8/ 96.4

48.0/ 48.0

48.9/ 52.5

63.2/ 69.1

76.3/ 84.1

90.6/100.6

43.7/ 43.7

45.9/ 50.1

60.3/ 66.7

73.3/ 81.7

87.6/ 98.3

49.7/ 49.7

50.7/ 54.3

65.1/ 70.9

78.1/ 85.9

92.4/102.5

19.8

25.4

29.1

42.7

46.4

22.5

27.5

31.2

44.8

48.5

20.6

26.2

29.9

43.5

47.2

50/50

—

60/60

—

50/50

50/60

—

42/42

42/46

56/62

68/75

81/91

48/48

48/51

61/66

73/80

86/95

44/44

44/48

58/63

70/77

83/93

50/50

50/53

63/68

75/82

88/97

115

116

234/234

239/239

253/253

258/258

114

118

119

123

124

7.2

008

13.8

16.8

27.7

30.7

—

009

008+008

008+009

025

—

002

003

—

003

—

003

—

NONE

002

—/—

—

13.6/15.6

21.9/25.3

33.4/38.5

43.8/50.5

55.2/63.8

—

004

005

—

60/ 70

80/ 80

90/100

004+004

004+005

NONE

002

—/—

—

70/ 70

80/ 90

100/110

13.6/15.6

21.9/25.3

33.4/38.5

43.8/50.5

55.2/63.8

004

005

STD

YES

004+004

004+005

208/230-3-60

NONE

002

—/—

—

13.6/15.6

21.9/25.3

33.4/38.5

43.8/50.5

55.2/63.8

—

004

005

—

HIGH STATIC

STD

70/ 70

80/ 90

90/100

004+004

004+005

NONE

002

004

005

004+004

004+005

—/—

60/60

—

13.6/15.6

21.9/25.3

33.4/38.5

43.8/50.5

55.2/63.8

YES

70/ 80

80/ 90

100/110

—

003

50HJ007

NONE

006

—

7.2

13.8

16.8

27.7

30.7

—

7.2

13.8

16.8

27.7

30.7

—

7.2

13.8

16.8

27.7

30.7

—

7.2

13.8

16.8

27.7

30.7

—

008

009

—

008+008

008+009

025

NONE

006

—

025

008

009

STD

YES

008+008

008+009

460-3-60

NONE

006

—

008

009

—

HIGH STATIC

—

008+008

008+009

025

NONE

006

23.3

28.3

32.0

45.6

49.3

—

025

128

008

009

YES

008+008

008+009

LEGEND

Full Load Amps

Example: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

FLA

—

HACR

IFM

Heating, Air Conditioning and Refrigeration

Indoor (Evaporator) Fan Motor

Locked Rotor Amps

LRA

MCA

MOCP

NEC

452 + 464 + 455

Average Voltage =

Minimum Circuit Amps

Maximum Overcurrent Protection

National Electrical Code

1371

Underwriters’ Laboratories

*Used to determine minimum disconnect per NEC.

= 457

†Single point box CRSINGLE017A00 is part of base unit.

Determine maximum deviation from average voltage.

(AB) 457 – 452 = 5 v

NOTES:

(BC) 464 – 457 = 7 v

1. In compliance with NEC requirements for multimotor and combination load

equipment (refer to NEC Articles 430 and 440), the overcurrent protective device

for the unit shall be fuse or HACR breaker. UL, Canada units may be fuse or cir-

cuit breaker.

(AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

2. Unbalanced 3-Phase Supply Voltage

457

% Voltage Imbalance = 100 x

Never operate a motor where a phase imbalance in supply voltage is greater

than 2%. Use the following formula to determine the percent of voltage

imbalance.

= 1.53%

This amount of phase imbalance is satisfactory as it is below the maximum allow-

able 2%.

max voltage deviation from average voltage

= 100 x

average voltage

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact

your local electric utility company immediately.

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Table 1C — Electrical Data (COBRA™ Energy Recovery 48HJ004-007 Units with 62AQ100)

POWER SUPPLY

DISCONNECT SIZE*

NOMINAL

V-PH-Hz

IFM

TYPE

CONV

OUTLET

62AQ

FLA

UNIT

FUSE OR

MCA

FLA

LRA

HACR BKR

STD

15.1

40.7/40.7

46.7/46.7

33.6/33.6

39.6/39.6

34.5/34.5

40.5/40.5

45/45

50/50

40/40

45/45

40/40

45/45

42/42

48/48

36/36

41/41

37/37

42/42

161/161

166/166

150/150

155/155

180/180

184/184

208/230-1-60

208/230-3-60

YES

HIGH STATIC

48HJ004

YES

STD

YES

15.1

16.5

19.2

16.9

19.6

STD

460-3-60

HIGH STATIC

YES

STD

15.1

50.3/50.3

56.3/56.3

37.6/37.6

43.6/43.6

38.5/38.5

44.5/44.5

60/60

70/70

45/45

50/50

45/45

50/50

51/51

57/57

39/39

45/45

40/40

46/46

199/199

204/204

166/166

171/171

196/196

200/200

208/230-1-60

208/230-3-60

YES

HIGH STATIC

48HJ005

YES

STD

YES

15.1

18.2

20.9

18.6

21.3

STD

460-3-60

HIGH STATIC

YES

102

STD

15.1

61.4/61.4

67.4/67.4

44.0/44.0

50.0/50.0

45.7/45.7

51.7/51.7

70/70

80/80

50/50

60/60

62/62

68/68

46/46

51/51

48/48

53/53

276/276

281/281

228/228

233/233

247/247

252/252

208/230-1-60

208/230-3-60

YES

HIGH STATIC

48HJ006

48HJ007

YES

STD

YES

15.1

22.2

24.9

23.0

25.7

47.9/47.9

53.9/53.9

49.6/49.6

55.6/55.6

22.8

25.5

23.6

26.3

60/60

49/49

55/55

51/51

57/57

114

119

123

128

260/260

265/265

279/279

284/284

127

131

136

141

STD

460-3-60

HIGH STATIC

STD

HIGH STATIC

STD

HIGH STATIC

YES

208/230-3-60

YES

460-3-60

LEGEND

YES

Example: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

FLA — Full Load Amps

HACR — Heating, Air Conditioning and Refrigeration

IFM

— Indoor (Evaporator) Fan Motor

LRA — Locked Rotor Amps

452 + 464 + 455

Average Voltage =

MCA — Minimum Circuit Amps

MOCP — Maximum Overcurrent Protection

NEC — National Electrical Code

1371

— Underwriters’ Laboratories

*Used to determine minimum disconnect per NEC.

= 457

†Single point box CRSINGLE017A00 is part of base unit.

Determine maximum deviation from average voltage.

(AB) 457 – 452 = 5 v

NOTES:

(BC) 464 – 457 = 7 v

1. In compliance with NEC requirements for multimotor and combi-

nation load equipment (refer to NEC Articles 430 and 440), the

overcurrent protective device for the unit shall be fuse or HACR

breaker. UL, Canada units may be fuse or circuit breaker.

2. Unbalanced 3-Phase Supply Voltage

(AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

457

Never operate a motor where a phase imbalance in supply volt-

age is greater than 2%. Use the following formula to determine

the percent of voltage imbalance.

= 1.53%

This amount of phase imbalance is satisfactory as it is below the

maximum allowable 2%.

max voltage deviation from average voltage

= 100 x

average voltage

IMPORTANT: If the supply voltage phase imbalance is more than

2%, contact your local electric utility company immediately.

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Table 1D — Electrical Data (COBRA™ Energy Recovery 50HJ004-007 Units with 62AQ100)

HEAT

POWER SUPPLY

SINGLE

POINT BOX

CRSINGLE

---A00

DISCONNECT SIZE*

HEATER

CRHEATER

---A00

NOMINAL

V-PH-Hz

IFM

TYPE

CONV

OUTLET

62AQ

FLA

UNIT

FUSE OR

HACR BKR

FLA

MCA

MOCP

FLA

LRA

NONE

001

—/—

40.7/ 40.7

42.5/ 45.5

52.0/ 56.5

61.9/ 67.9

70.0/ 77.3

81.3/ 90.3

45/45

50/60

—

42/ 42

42/ 44

50/ 54

59/ 65

67/ 73

77/ 85

161/161

15.9/18.3

23.5/27.1

31.4/36.3

37.9/43.8

46.9/54.2

—

002

60/ 70

70/ 70

80/ 80

90/100

004

005

STD

YES

15.1

003

—

004

—

002+002

208/230-1-60

NONE

001

—/—

46.7/ 46.7

47.3/ 49.7

56.8/ 60.7

66.7/ 72.1

74.8/ 81.5

86.1/ 94.5

33.6/ 33.6

34.1/ 35.9

39.6/ 42.2

45.3/ 48.8

50.0/ 54.2

64.3/ 70.7

39.6/ 39.6

39.6/ 40.1

44.4/ 46.4

50.1/ 53.0

54.8/ 58.4

69.1/ 74.9

34.5/ 34.5

35.0/ 36.8

40.5/ 43.1

46.2/ 49.7

50.9/ 55.1

65.2/ 71.6

50/50

60/60

—

48/ 48

48/ 49

56/ 59

65/ 70

72/ 78

82/ 90

36/ 36

39/ 41

44/ 47

48/ 52

61/ 67

41/ 41

44/ 46

49/ 52

54/ 57

67/ 72

37/ 37

40/ 42

45/ 48

49/ 53

62/ 68

166/166

150/150

155/155

180/180

15.9/18.3

23.5/27.1

31.4/36.3

37.9/43.8

46.9/54.2

—

002

70/ 70

70/ 80

80/ 90

90/100

004

005

003

—

004

—

002+002

NONE

001

—/—

40/40

45/45

50/50

60/60

—

9.2/10.6

13.6/15.6

18.1/20.9

21.9/25.3

33.4/38.5

002

—

STD

003

—

004

—

005

70/ 80

002

NONE

001

—/—

45/45

50/50

60/60

—

9.2/10.6

13.6/15.6

18.1/20.9

21.9/25.3

33.4/38.5

002

—

STD

YES

003

—

004

60/ 70

80/ 80

002

005

—

208/230-3-60

NONE

001

—/—

40/40

45/45

50/50

60/60

—

9.2/10.6

13.6/15.6

18.1/20.9

21.9/25.3

33.4/38.5

002

—

HIGH STATIC

003

—

50HJ004

004

—

005

70/ 80

002

NONE

001

—/—

40.5/ 40.5

40.5/ 41.0

45.3/ 47.3

51.0/ 53.9

55.7/ 59.3

70.0/ 75.8

45/45

50/50

60/60

—

42/ 42

45/ 47

50/ 53

55/ 58

68/ 73

184/184

9.2/10.6

13.6/15.6

18.1/20.9

21.9/25.3

33.4/38.5

002

—

YES

003

—

004

70/ 70

80/ 80

002

003

005

—

NONE

006

—

16.5

20.1

24.3

28.4

32.1

19.2

22.2

26.4

30.5

34.2

16.9

20.5

24.7

28.8

32.5

19.6

22.6

26.8

30.9

34.6

20.0

25.0

30.0

35.0

20.0

30.0

35.0

40.0

20.0

25.0

30.0

35.0

25.0

30.0

35.0

40.0

—

7.2

STD

YES

15.1

007

10.6

13.8

16.8

—

7.2

10.6

13.8

16.8

—

7.2

10.6

13.8

16.8

—

7.2

10.6

13.8

16.8

—

008

009

025

—

025

—

025

—

025

NONE

006

STD

007

008

009

460-3-60

NONE

006

HIGH STATIC

007

008

009

NONE

006

YES

007

008

009

NONE

001

—/—

50.3/ 50.3

61.9/ 67.9

81.3/ 90.3

60/60

—

51/ 51

59/ 65

77/ 85

95/106

110/124

199/199

15.9/18.3

31.4/36.3

46.9/54.2

—

003

70 70

90/100

110/125

125/150

004

005

STD

15.1

002+002

003+003

004+004

—

62.8/72.5 101.2/113.3

75.8/87.5 117.4/132.0

—

208/230-1-60

NONE

001

—/—

56.3/ 56.3

66.7/ 72.1

86.1/ 94.5

70/70

—

57/ 57

65/ 70

82/ 90

101/111

116/128

204/204

15.9/18.3

31.4/36.3

46.9/54.2

70/ 70

70/ 80

90/100

110/125

125/150

004

005

003

—

YES

002+002

003+003

004+004

—

62.8/72.5 106.0/117.5

75.8/87.5 122.2/136.2

—

NONE

002

—/—

37.6/ 37.6

39.6/ 42.2

45.3/ 48.8

64.3/ 70.7

77.3/ 85.8

43.6/ 43.6

44.4/ 46.4

50.1/ 53.0

69.1/ 74.9

82.1/ 90.0

38.5/ 38.5

40.5/ 43.1

46.2/ 49.7

65.2/ 71.6

78.2/ 86.7

45/45

50/50

60/60

—

39/ 39

39/ 41

44/ 47

61/ 67

73/ 81

45/ 45

45/ 46

49/ 52

67/ 72

79/ 86

40/ 40

40/ 42

45/ 48

62/ 68

74/ 82

166/166

171/171

196/196

13.6/15.6

18.1/20.9

33.4/38.5

43.8/50.5

—

STD

YES

15.1

003

—

70/ 80

80/ 90

—

005

004+004

002

003

—

002

003

—

002

003

—

NONE

002

—/—

50/50

60/60

—

50HJ005

13.6/15.6

18.1/20.9

33.4/38.5

43.8/50.5

—

003

—

005

80/ 80

90/ 90

004+004

—

208/230-3-60

NONE

002

—/—

45/45

50/50

60/60

—

13.6/15.6

18.1/20.9

33.4/38.5

43.8/50.5

—

HIGH STATIC

003

—

005

70/ 80

80/ 90

004+004

—

NONE

002

—/—

44.5/ 44.5

45.3/ 47.3

51.0/ 53.9

70.0/ 75.8

83.0/ 90.9

18.2

20.1

28.4

32.1

45.6

50/50

60/60

—

46/ 46

46/ 47

50/ 53

68/ 73

80/ 87

200/200

13.6/15.6

18.1/20.9

33.4/38.5

43.8/50.5

—

HIGH STATIC

STD

YES

15.1

003

—

80/ 80

90/100

—

005

004+004

003

—

025

—

NONE

006

—

7.2

13.8

16.8

27.7

460-3-60

008

009

008+008

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Table 1D — Electrical Data (COBRA™ Energy Recovery 50HJ004-007 Units with 62AQ100) (cont)

HEAT

FLA

POWER SUPPLY

SINGLE

POINT BOX

CRSINGLE

---A00

DISCONNECT SIZE*

HEATER

CRHEATER

---A00

NOMINAL

V-PH-Hz

IFM

TYPE

CONV

OUTLET

62AQ

FLA

UNIT

FUSE OR

HACR BKR

MCA

MOCP

FLA

LRA

NONE

006

—

20.9

22.2

30.5

34.2

47.7

18.6

20.5

28.8

32.5

46.0

21.3

22.6

30.9

34.6

48.1

—

7.2

—

STD

YES

15.1

008

13.8

16.8

27.7

—

7.2

13.8

16.8

27.7

—

7.2

025

—

025

—

009

008+008

NONE

006

50HJ005

(cont)

460-3-60

HIGH STATIC

008

009

008+008

108

NONE

006

102

103

110

YES

008

13.8

16.8

27.7

025

009

008+008

NONE

002

—/—

61.4/ 61.4

65.8/ 71.8

85.2/ 94.2

70/70

—

62/ 62

64/ 69

81/ 90

100/111

115/128

276/276

23.5/27.1

31.4/36.3

46.9/54.2

70/ 70

70/ 80

90/100

110/125

125/150

004

005

003

—

STD

YES

15.1

002+002

003+003

004+004

—

62.8/72.5 105.1/117.2

75.8/87.5 121.3/135.9

—

208/230-1-60

NONE

002

—/—

67.4/ 67.4

70.6/ 76.0

90.0/ 98.4

80/80

—

68/ 68

69/ 74

87/ 95

105/116

120/133

46/ 46

49/ 53

62/ 68

74/ 82

88/ 97

51/ 51

55/ 58

68/ 73

80/ 87

93/102

48/ 48

51/ 55

64/ 70

76/ 84

90/ 99

281/281

228/228

233/233

247/247

23.5/27.1

31.4/36.3

46.9/54.2

80/ 80

90/100

110/125

150/150

004

005

003

—

002+002

003+003

004+004

—

62.8/72.5 109.9/121.4

75.8/87.5 126.1/140.1

—/—

13.6/15.6

21.9/25.3

33.4/38.5

43.8/50.5

55.2/63.8

—

NONE

002

44.0/ 44.0

50.9/ 55.1

65.2/ 71.6

78.2/ 86.7

92.6/103.2

50.0/ 50.0

55.7/ 59.3

70.0/ 75.8

83.0/ 90.9

97.4/107.4

45.7/ 45.7

52.6/ 56.8

66.9/ 73.3

79.9/ 88.4

94.3/104.9

51.7/ 51.7

57.4/ 61.0

71.7/ 77.5

84.7/ 92.6

99.1/109.1

50/50

60/60

—

70/ 80

80/ 90

100/110

—

70/ 70

80/ 80

90/100

100/110

—

60/ 70

70/ 80

80/ 90

100/110

—

70/ 70

80/ 80

90/100

100/110

—

002

003

—

002

003

—

002

003

—

002

003

004

005

STD

004+004

004+005

NONE

002

—/—

60/60

—

13.6/15.6

21.9/25.3

33.4/38.5

43.8/50.5

55.2/63.8

004

005

50HJ006

STD

YES

—

004+004

004+005

—

208/230-3-60

NONE

002

—/—

60/60

—

13.6/15.6

21.9/25.3

33.4/38.5

43.8/50.5

55.2/63.8

004

005

HIGH STATIC

—

004+004

004+005

—

NONE

002

004

005

004+004

004+005

—/—

60/60

—

53/ 53

57/ 60

70/ 75

82/ 89

95/104

252/252

13.6/15.6

21.9/25.3

33.4/38.5

43.8/50.5

55.2/63.8

YES

—

NONE

006

—

22.2

28.8

32.5

46.0

49.8

—

114

7.2

—

008

13.8

16.8

27.7

30.7

025

460-3-60

STD

15.1

009

008+008

008+009

LEGEND

Full Load Amps

Example: Supply voltage is 460-3-60.

AB = 452 v

FLA

—

BC = 464 v

HACR

IFM

Heating, Air Conditioning and Refrigeration

Indoor (Evaporator) Fan Motor

Locked Rotor Amps

AC = 455 v

LRA

MCA

MOCP

NEC

452 + 464 + 455

Average Voltage =

Minimum Circuit Amps

Maximum Overcurrent Protection

National Electrical Code

1371

Underwriters’ Laboratories

*Used to determine minimum disconnect per NEC.

= 457

Determine maximum deviation from average voltage.

(AB) 457 – 452 = 5 v

†Single point box CRSINGLE017A00 is part of base unit.

NOTES:

(BC) 464 – 457 = 7 v

1. In compliance with NEC requirements for multimotor and combination load

equipment (refer to NEC Articles 430 and 440), the overcurrent protective device

for the unit shall be fuse or HACR breaker. UL, Canada units may be fuse or cir-

cuit breaker.

(AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

457

2. Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater

than 2%. Use the following formula to determine the percent of voltage

imbalance.

= 1.53%

This amount of phase imbalance is satisfactory as it is below the maximum allow-

able 2%.

max voltage deviation from average voltage

= 100 x

average voltage

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact

your local electric utility company immediately.

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Table 1D — Electrical Data (COBRA™ Energy Recovery 50HJ004-007 Units with 62AQ100) (cont)

HEAT

FLA

POWER SUPPLY

SINGLE

POINT BOX

CRSINGLE

---A00

DISCONNECT SIZE*

HEATER

CRHEATER

---A00

NOMINAL

V-PH-Hz

IFM

TYPE

CONV

OUTLET

62AQ

FLA

UNIT

FUSE OR

HACR BKR

MCA

MOCP

FLA

LRA

NONE

006

—

24.9

30.9

34.6

48.1

51.9

—

119

7.2

—

008

13.8

16.8

27.7

30.7

025

STD

HIGH STATIC

STD

YES

15.1

009

008+008

008+009

NONE

006

—

23.0

29.6

33.3

46.8

50.6

25.7

31.7

35.4

48.9

52.7

60/60

—

70/ 80

80/ 90

100/110

—

70/ 70

80/ 80

90/100

100/110

—

60/ 70

70/ 80

80/ 90

100/110

—

49/ 49

49/ 53

62/ 68

74/ 82

88/ 97

55/ 55

55/ 58

68/ 73

80/ 87

93/102

51/ 51

51/ 55

64/ 70

76/ 84

90/ 99

57/ 57

57/ 60

70/ 75

82/ 89

95/104

123

124

128

129

260/260

265/265

279/279

284/284

127

131

132

7.2

—

50HJ006

(cont)

008

13.8

16.8

27.7

30.7

—

7.2

13.8

16.8

27.7

30.7

025

—

025

—

002

003

—

002

003

—

002

003

—

002

003

—

025

—

025

—

460-3-60

009

008+008

008+009

NONE

006

008

009

YES

008+008

008+009

NONE

002

—/—

47.9/ 47.9

13.6/15.6 47.9/ 47.9

21.9/25.3 50.9/ 55.1

33.4/38.5 65.2/ 71.6

43.8/50.5 78.2/ 86.7

55.2/63.8 92.6/103.2

004

005

004+004

004+005

NONE

002

—/—

53.9/ 53.9

60/60

—

13.6/15.6 53.9/ 53.9

21.9/25.3 55.7/ 59.3

33.4/38.5 70.0/ 75.8

43.8/50.5 83.0/ 90.9

55.2/63.8 97.4/107.4

004

005

STD

YES

—

004+004

004+005

—

208/230-3-60

NONE

002

004

005

004+004

004+005

—/—

49.6/ 49.6

60/60

—

13.6/15.6 49.6/ 49.6

21.9/25.3 52.6/ 56.8

33.4/38.5 66.9/ 73.3

43.8/50.5 79.9/ 88.4

55.2/63.8 94.3/104.9

HIGH STATIC

STD

—

NONE

002

—/—

55.6/ 55.6

60/60

—

70/ 70

80/ 80

90/100

100/110

13.6/15.6 55.6/ 55.6

21.9/25.3 57.4/ 61.0

33.4/38.5 71.7/ 77.5

43.8/50.5 84.7/ 92.6

55.2/63.8 99.1/109.1

004

005

YES

—

004+004

004+005

—

50HJ007

NONE

006

—

7.2

13.8

16.8

27.7

30.7

—

7.2

13.8

16.8

27.7

30.7

—

7.2

13.8

16.8

27.7

30.7

—

7.2

13.8

16.8

27.7

30.7

22.8

28.8

32.5

46.0

49.8

25.5

30.9

34.6

48.1

51.9

23.6

29.6

33.3

46.8

50.6

26.3

31.7

35.4

48.9

52.7

—

008

009

008+008

008+009

NONE

006

008

009

STD

YES

008+008

008+009

460-3-60

NONE

006

136

137

141

008

009

025

—

025

HIGH STATIC

008+008

008+009

NONE

006

008

009

YES

008+008

008+009

LEGEND

Full Load Amps

Example: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

FLA

—

HACR

IFM

Heating, Air Conditioning and Refrigeration

Indoor (Evaporator) Fan Motor

Locked Rotor Amps

LRA

MCA

MOCP

NEC

452 + 464 + 455

Average Voltage =

Minimum Circuit Amps

Maximum Overcurrent Protection

National Electrical Code

1371

Underwriters’ Laboratories

*Used to determine minimum disconnect per NEC.

= 457

†Single point box CRSINGLE017A00 is part of base unit.

Determine maximum deviation from average voltage.

(AB) 457 – 452 = 5 v

NOTES:

(BC) 464 – 457 = 7 v

1. In compliance with NEC requirements for multimotor and combination load

equipment (refer to NEC Articles 430 and 440), the overcurrent protective device

for the unit shall be fuse or HACR breaker. UL, Canada units may be fuse or cir-

cuit breaker.

(AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

457

2. Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater

than 2%. Use the following formula to determine the percent of voltage

imbalance.

= 1.53%

This amount of phase imbalance is satisfactory as it is below the maximum allow-

able 2%.

max voltage deviation from average voltage

= 100 x

average voltage

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact

your local electric utility company immediately.

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Table 1E — Electrical Data (COBRA™ Energy Recovery 48HJ008-014 Units with 62AQ200)

POWER SUPPLY

FUSE OR

DISCONNECT SIZE*

NOMINAL

V-PH-HZ

IFM

TYPE

CONV

OUTLET

62AQ

FLA

UNIT

MCA

FLA

LRA

HACR BKR

STD

YES

21.9

60.1

66.1

63.2

69.2

366

371

391

395

STD

208/230-3-60

460-3-60

HIGH STATIC

YES

48HJ008

STD

YES

10.2

29.4

32.1

30.8

33.5

184

186

197

199

STD

HIGH STATIC

YES

STD

YES

21.9

62.1

68.1

65.2

400

405

425

STD

208/230-3-60

460-3-60

HIGH STATIC

YES

48HJ009

STD

YES

10.2

31.7

34.4

33.1

35.8

206

208

219

221

STD

HIGH STATIC

YES

STD

YES

21.9

74.9

80.9

79.3

85.3

465

469

488

493

STD

208/230-3-60

460-3-60

HIGH STATIC

YES

48HJ012

48HJ014

STD

YES

10.2

21.9

35.1

37.8

37.7

40.4

82.5

88.5

100

234

236

245

247

550

555

STD

HIGH STATIC

YES

STD

YES

208/230-3-60

460-3-60

10.2

39.3

42.0

270

272

LEGEND

Example: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

FLA — Full Load Amps

HACR — Heating, Air Conditioning and Refrigeration

IFM

— Indoor (Evaporator) Fan Motor

LRA — Locked Rotor Amps

452 + 464 + 455

Average Voltage =

MCA — Minimum Circuit Amps

MOCP — Maximum Overcurrent Protection

NEC — National Electrical Code

1371

— Underwriters’ Laboratories

*Used to determine minimum disconnect per NEC.

= 457

†Single point box CRSINGLE017A00 is part of base unit.

Determine maximum deviation from average voltage.

(AB) 457 – 452 = 5 v

NOTES:

(BC) 464 – 457 = 7 v

1. In compliance with NEC requirements for multimotor and combi-

nation load equipment (refer to NEC Articles 430 and 440), the

overcurrent protective device for the unit shall be fuse or HACR

breaker. UL, Canada units may be fuse or circuit breaker.

2. Unbalanced 3-Phase Supply Voltage

(AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

457

Never operate a motor where a phase imbalance in supply volt-

age is greater than 2%. Use the following formula to determine

the percent of voltage imbalance.

= 1.53%

This amount of phase imbalance is satisfactory as it is below the

maximum allowable 2%.

max voltage deviation from average voltage

= 100 x

average voltage

IMPORTANT: If the supply voltage phase imbalance is more than

2%, contact your local electric utility company immediately.

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Table 1F — Electrical Data (COBRA™ Energy Recovery 50HJ008-014 Units with 62AQ200)

HEAT

POWER SUPPLY

SINGLE

POINT BOX

CRSINGLE

---A00

DISCONNECT SIZE*

HEATER

CRHEATER

---A00

NOMINAL

V-PH-Hz

IFM

TYPE

CONV

OUTLET

62AQ

FLA

UNIT

FUSE OR

HACR BKR

FLA

MCA

MOCP

FLA

LRA

NONE

017

—/—

60.1/ 60.1

60.1/ 64.0

74.5/ 80.9

97.4/107.4

70/70

—

—/—

—

66/ 66

72/ 78

93/102

111/122

135/151

366/366

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7

70/ 80

80/ 90

100/110

125/150

150/175

007

009

010

—

STD

YES

21.9

10.2

21.9

10.2

011

—

012

66.7/ 77.0 116.2/129.0

88.4/102.0 143.3/160.3

—

012+017

—

NONE

017

—/—

66.1/ 66.1

66.1/ 68.2

79.3/ 85.1

70/70

—

—/—

—

71/ 71

78/ 83

99/107

116/127

141/156

69/ 69

76/ 82

97/106

114/126

139/155

371/371

391/391

395/395

184.0

186.0

196.0

197.0

198.0

199.0

400/400

405/405

425/425

429/429

206.0

208.0

218.0

219.0

220.0

221.0

21.7/ 25.0

33.4/ 38.5

80/ 80

90/ 90

110/125

125/150

150/175

007

009

010

—

011

51.7/ 59.7 102.2/111.6

66.7/ 77.0 121.0/133.2

88.4/102.0 148.1/164.5

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7 100.5/110.5

66.7/ 77.0 119.3/132.1

88.4/102.0 146.4/163.4

—/—

21.7/ 25.0

33.4/ 38.5

—

012

—

012+017

—

208/230-3-60

NONE

017

63.2/ 63.2

63.2/ 67.1

77.6/ 84.0

70/70

—

—/—

—

80/ 80

90/ 90

110/125

125/150

150/175

007

009

010

—

HIGH STATIC

STD

011

—

012

—

012+017

—

NONE

017

69.2/ 69.2

69.2/ 71.3

82.4/ 88.2

80/80

—

—/—

—

75/ 75

81/ 86

80/ 80

90/100

110/125

125/150

175/175

007

009

010

—

YES

011

51.7/ 59.7 105.3/114.7

66.7/ 77.0 124.1/136.3

88.4/102.0 151.2/167.6

—

102/111

120/131

145/160

32.0

35.0

38.0

54.0

61.0

73.0

34.0

37.0

41.0

57.0

64.0

76.0

34.0

36.0

40.0

56.0

63.0

75.0

36.0

39.0

42.0

58.0

65.0

77.0

68/ 68

72/ 78

93/102

111/122

135/151

73/ 73

78/ 83

99/107

116/127

141/156

71/ 71

76/ 82

97/106

114/126

139/155

012

—

012+017

—

50HJ008

NONE

016

—

29.4

36.1

40.0

57.0

64.8

77.9

32.1

38.2

42.1

59.1

66.9

80.0

30.8

37.5

41.4

58.4

66.2

79.3

33.5

39.6

43.5

60.5

68.3

81.4

35.0

40.0

45.0

60.0

—

16.7

19.8

33.4

39.7

50.2

006

008

010

013

—

014

—

015

70.0

80.0

014+016

—

NONE

016

—

35.0

45.0

60.0

—

16.7

19.8

33.4

39.7

50.2

006

008

010

013

—

STD

YES

014

—

015

70.0

80.0

014+016

—

460-3-60

NONE

016

—

35.0

40.0

45.0

60.0

—

16.7

19.8

33.4

39.7

50.2

006

008

010

013

—

HIGH STATIC

STD

014

—

015

70.0

80.0

014+016

—

NONE

016

—

35.0

45.0

—

70.0

90.0

—

16.7

19.8

33.4

39.7

50.2

006

008

010

013

YES

014

015

014+016

NONE

017

—/—

62.1/ 62.1

62.1/ 64.0

74.5/ 80.9

97.4/107.4

70/70

—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7

70/ 80

80/ 90

100/110

125/150

150/175

012

015

010

—

011

—

012

66.7/ 77.0 116.2/129.0

88.4/102.0 143.3/160.3

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7 102.2/111.6

66.7/ 77.0 121.0/133.2

88.4/102.0 148.1/164.5

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7 100.5/110.5

66.7/ 77.0 119.3/132.1

88.4/102.0 146.4/163.4

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7 105.3/114.7

66.7/ 77.0 124.1/136.3

88.4/102.0 151.2/167.6

—

012+017

—

NONE

017

68.1/ 68.1

68.1/ 68.2

79.3/ 85.1

70/70

—

80/ 80

90/ 90

110/125

125/150

150/175

012

015

010

—

STD

YES

011

—

012

—

012+017

—

208/230-3-60

NONE

017

65.2/ 65.2

65.2/ 67.1

77.6/ 84.0

70/70

—

—/—

—

80/ 80

90/ 90

110/125

125/150

150/175

012

015

010

—

HIGH STATIC

STD

011

—

012

—

012+017

—

NONE

017

71.2/ 71.2

71.2/ 71.3

82.4 /88.2

80/80

—

—/—

—

77/ 77

81/ 86

80/ 80

90/100

110/125

125/150

175/175

012

015

010

—

YES

011

—

102/111

120/131

145/160

34.0

35.0

38.0

54.0

61.0

73.0

37.0

41.0

57.0

64.0

76.0

36.0

40.0

56.0

63.0

75.0

012

—

012+017

—

50HJ009

NONE

016

—

31.7

36.1

40.0

57.0

64.8

77.9

34.4

38.2

42.1

59.1

66.9

80.0

33.1

37.5

41.4

58.4

66.2

79.3

35.8

39.6

43.5

60.5

68.3

81.4

35.0

40.0

45.0

60.0

—

16.7

19.8

33.4

39.7

50.2

011

014

016

013

—

014

—

015

70.0

80.0

014+016

—

NONE

016

—

40.0

45.0

60.0

—

16.7

19.8

33.4

39.7

50.2

011

014

016

013

—

STD

YES

014

—

015

70.0

80.0

014+016

—

460-3-60

NONE

016

—

35.0

40.0

45.0

60.0

—

16.7

19.8

33.4

39.7

50.2

011

014

016

013

—

HIGH STATIC

014

—

015

70.0

80.0

014+016

—

NONE

016

—

40.0

45.0

—

70.0

90.0

—

38.0

39.0

42.0

58.0

65.0

77.0

16.7

19.8

33.4

39.7

50.2

011

014

016

013

YES

014

015

014+016

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Table 1F — Electrical Data (COBRA™ Energy Recovery 50HJ008-014 Units with 62AQ200) (cont)

HEAT

POWER SUPPLY

SINGLE

POINT BOX

CRSINGLE

---A00

DISCONNECT SIZE*

HEATER

CRHEATER

---A00

NOMINAL

V-PH-Hz

IFM

TYPE

CONV

OUTLET

62AQ

FLA

UNIT

FUSE OR

HACR BKR

FLA

MCA

MOCP

FLA

LRA

NONE

017

—/—

74.9/ 74.9

77.6/ 84.0

119.3/132.1

146.4/163.4

166.2/156.2

—

80/ 80

†

81/ 81

465/465

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

010

90/ 90

81/ 82

STD

YES

21.9

10.2

21.9

10.2

012

012+017

010+012

125/150

150/175

175/175

114/126

139/155

157/176

NONE

017

—/—

80.9/ 80.9

82.4/ 88.2

124.1/136.3

151.2/167.6

171.0/160.4

79.3/ 79.3

82.3/ 88.8

124.0/136.9

151.1/168.2

170.9/160.9

85.3/ 85.3

87.1/ 93.0

128.8/141.1

155.9/172.4

175.7/165.1

35.1

37.5

41.4

66.2

79.3

76.7

37.8

39.6

43.5

68.3

81.4

78.8

37.7

40.3

44.3

69.1

82.1

79.6

40.4

42.4

46.4

71.2

84.2

81.7

82.5/ 82.5

82.3/ 88.8

124.0/136.9

151.1/168.2

170.9/160.9

—

40.0

45.0

—

40.0

45.0

—

40.0

45.0

50.0

—

45.0

50.0

—

45.0

50.0

—

90/ 90

†

87/ 87

469/469

488/488

493/493

233.0

234.0

235.0

236.0

245.0

247.0

550/550

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

010

90/100

87/ 87

012

012+017

010+012

125/150

175/175

90/ 90

90/100

125/150

175/175

175/200

90/ 90

100/100

150/150

175/175

200/200

—

70.0

80.0

90.0

—

70.0

90.0

—

70.0

90.0

—

80.0

90.0

120/131

145/160

163/181

86/ 86

86/ 87

119/131

144/160

162/181

92/ 92

125/136

150/165

168/186

38.0

40.0

63.0

75.0

86.0

40.0

42.0

65.0

77.0

89.0

41.0

43.0

66.0

78.0

89.0

43.0

45.0

68.0

80.0

92.0

89/ 89

119/131

144/160

162/181

95/ 95

125/136

150/165

168/186

43.0

66.0

78.0

89.0

45.0

68.0

80.0

92.0

208/230-3-60

NONE

017

—/—

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

010

012

HIGH STATIC

STD

012+017

010+012

NONE

017

—/—

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

010

012

YES

012+017

010+012

50HJ012

NONE

016

—

16.7

19.8

39.7

50.2

60.1

011

014

016

013

015

014+016

013+015

NONE

016

—

16.7

19.8

39.7

50.2

60.1

011

014

016

013

015

STD

YES

014+016

013+015

460-3-60

NONE

016

—

16.7

19.8

39.7

50.2

60.1

011

014

016

013

015

HIGH STATIC

STD

014+016

013+015

NONE

016

—

16.7

19.8

39.7

50.2

60.1

011

014

016

013

015

YES

014+016

013+015

NONE

017

—/—

90/ 90

90/100

†

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

010

012

125/150

175/175

175/200

100/100

150/150

175/175

200/200

—

70.0

90.0

012+017

010+012

208/230-3-60

NONE

017

—/—

88.5/ 88.5

87.1/ 93.0

128.8/141.1

155.9/172.4

175.7/165.1

39.3

40.3

44.3

69.1

82.1

79.6

42.0

42.4

46.4

71.2

84.2

81.7

555/555

260.0

262.0

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

010

012

STD

YES

012+017

010+012

50HJ014

NONE

016

—

16.7

19.8

39.7

50.2

60.1

011

016

013

015

STD

014+016

013+015

460-3-60

NONE

016

—

45.0

50.0

—

80.0

90.0

—

16.7

19.8

39.7

50.2

60.1

011

016

013

015

STD

YES

014+016

013+015

LEGEND

Full Load Amps

Example: Supply voltage is 460-3-60.

FLA

—

AB = 452 v

BC = 464 v

AC = 455 v

HACR

IFM

Heating, Air Conditioning and Refrigeration

Indoor (Evaporator) Fan Motor

Locked Rotor Amps

LRA

MCA

MOCP

NEC

452 + 464 + 455

Minimum Circuit Amps

Average Voltage =

Maximum Overcurrent Protection

National Electrical Code

1371

Underwriters’ Laboratories

*Used to determine minimum disconnect per NEC.

= 457

Determine maximum deviation from average voltage.

(AB) 457 – 452 = 5 v

†Single point box CRSINGLE017A00 is part of base unit.

NOTES:

1. In compliance with NEC requirements for multimotor and combination load equipment

(refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall

be fuse or HACR breaker. UL, Canada units may be fuse or circuit breaker.

2. Unbalanced 3-Phase Supply Voltage

(BC) 464 – 457 = 7 v

(AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

Never operate a motor where a phase imbalance in supply voltage is greater than 2%.

Use the following formula to determine the percent of voltage imbalance.

% Voltage Imbalance = 100 x

457

max voltage deviation from average voltage

= 1.53%

= 100 x

average voltage

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your

local electric utility company immediately.

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Table 1G — Electrical Data (COBRA™ Energy Recovery 48HJ008-014 Units with 62AQ300)

POWER SUPPLY

FUSE OR

DISCONNECT SIZE*

NOMINAL

V-PH-Hz

IFM

TYPE

CONV

OUTLET

62AQ

FLA

UNIT

MCA

FLA

LRA

HACR BKR

STD

YES

29.8

68.0

74.0

71.1

77.1

420

425

445

449

STD

208/230-3-60

460-3-60

HIGH STATIC

YES

48HJ008

STD

YES

15.8

35.0

37.7

36.4

39.1

211

213

224

226

STD

HIGH STATIC

YES

STD

YES

29.8

70.0

76.0

73.1

79.1

454

459

479

483

STD

208/230-3-60

460-3-60

HIGH STATIC

YES

48HJ009

STD

YES

15.8

37.3

40.0

38.7

41.4

233

235

246

248

STD

HIGH STATIC

YES

STD

YES

29.8

82.8

88.8

87.2

93.2

100

519

523

542

547

STD

208/230-3-60

460-3-60

HIGH STATIC

YES

101

48HJ012

48HJ014

STD

YES

15.8

29.8

40.7

43.4

43.3

46.0

90.4

96.4

100

104

261

263

272

274

604

609

STD

HIGH STATIC

YES

STD

YES

208/230-3-60

460-3-60

15.8

44.9

47.6

297

299

LEGEND

Example: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

FLA — Full Load Amps

HACR — Heating, Air Conditioning and Refrigeration

IFM

— Indoor (Evaporator) Fan Motor

LRA — Locked Rotor Amps

452 + 464 + 455

Average Voltage =

MCA — Minimum Circuit Amps

MOCP — Maximum Overcurrent Protection

NEC — National Electrical Code

1371

— Underwriters’ Laboratories

*Used to determine minimum disconnect per NEC.

= 457

†Single point box CRSINGLE017A00 is part of base unit.

Determine maximum deviation from average voltage.

(AB) 457 – 452 = 5 v

NOTES:

(BC) 464 – 457 = 7 v

1. In compliance with NEC requirements for multimotor and combi-

nation load equipment (refer to NEC Articles 430 and 440), the

overcurrent protective device for the unit shall be fuse or HACR

breaker. UL, Canada units may be fuse or circuit breaker.

2. Unbalanced 3-Phase Supply Voltage

(AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

457

Never operate a motor where a phase imbalance in supply volt-

age is greater than 2%. Use the following formula to determine

the percent of voltage imbalance.

= 1.53%

This amount of phase imbalance is satisfactory as it is below the

maximum allowable 2%.

max voltage deviation from average voltage

= 100 x

average voltage

IMPORTANT: If the supply voltage phase imbalance is more than

2%, contact your local electric utility company immediately.

Download from Www.Somanuals.com. All Manuals Search And Download.

Table 1H — Electrical Data (COBRA™ Energy Recovery 50HJ008-014 Units with 62AQ300)

HEAT

POWER SUPPLY

SINGLE

POINT BOX

CRSINGLE

---A00

DISCONNECT SIZE*

HEATER

CRHEATER

---A00

NOMINAL

V-PH-Hz

IFM

TYPE

CONV

OUTLET

62AQ

FLA

UNIT

FUSE OR

HACR BKR

FLA

MCA

MOCP

FLA

LRA

NONE

017

—/—

68.0/ 68.0

68.7/ 72.9

83.3/ 89.7

80/80

—

75/ 75

420/420

21.7/ 25.0

33.4/ 38.5

90/ 90

100/100

125/125

150/150

175/175

007

009

010

—

81/ 87

STD

YES

29.8

15.8

29.8

011

51.7/ 59.7 106.2/116.2

66.7/ 77.0 125.0/137.8

88.4/102.0 152.1/169.1

—

102/112

120/131

145/160

012

—

012+017

—

NONE

017

—/—

74.0/ 74.0

74.0/ 77.1

88.1/ 93.9

80/80

—

80/ 80

425/425

445/445

449/449

211.0

213.0

223.0

224.0

225.0

226.0

454/454

21.7/ 25.0

33.4/ 38.5

90/ 90

100/110

125/125

150/150

175/175

007

009

010

—

87/ 92

011

51.7/ 59.7 111.0/120.4

66.7/ 77.0 129.8/142.0

88.4/102.0 156.9/173.3

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7 109.3/119.3

66.7/ 77.0 128.1/140.9

88.4/102.0 155.2/172.2

—/—

21.7/ 25.0

33.4/ 38.5

—

108/116

125/136

150/165

78/ 78

85/ 91

106/115

123/135

148/164

84/ 84

90/ 96

111/120

129/140

154/169

38.0

41.0

45.0

61.0

68.0

80.0

41.0

44.0

47.0

63.0

70.0

82.0

40.0

43.0

47.0

62.0

69.0

81.0

43.0

45.0

49.0

65.0

72.0

84.0

77/ 77

81/ 87

012

—

012+017

—

208/230-3-60

NONE

017

71.1/ 71.1

71.8/ 76.0

86.4/ 92.8

80/80

—

90/ 90

100/110

125/125

150/150

175/175

007

009

010

—

HIGH STATIC

STD

011

—

012

—

012+017

—

NONE

017

77.1/ 77.1

77.1/ 80.2

91.2/ 97.0

80/80

—

90/100

110/110

125/150

150/150

175/200

007

009

010

—

YES

011

51.7/ 59.7 114.1/123.5

66.7/ 77.0 132.9/145.1

88.4/102.0 160.0/176.4

—

012

—

012+017

—

50HJ008

NONE

016

—

35.0

44.4

48.3

65.3

73.1

86.2

37.7

46.5

50.4

67.4

75.2

88.3

36.4

45.8

49.7

66.7

74.5

87.6

39.1

47.9

51.8

68.8

76.6

89.7

40.0

60.0

—

40.0

60.0

—

40.0

60.0

—

45.0

60.0

—

80.0

90.0

100.0

—

80.0

90.0

100.0

—

80.0

90.0

100.0

—

80.0

90.0

100.0

—

16.7

19.8

33.4

39.7

50.2

006

008

010

013

014

015

014+016

NONE

016

—

16.7

19.8

33.4

39.7

50.2

006

008

010

013

STD

YES

014

015

014+016

460-3-60

NONE

016

—

16.7

19.8

33.4

39.7

50.2

006

008

010

013

HIGH STATIC

STD

014

015

014+016

NONE

016

—

16.7

19.8

33.4

39.7

50.2

006

008

010

013

YES

014

015

014+016

NONE

017

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7 106.2/116.2

66.7/ 77.0 125.0/137.8

88.4/102.0 152.1/169.1

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7 111.0/120.4

66.7/ 77.0 129.8/142.0

88.4/102.0 156.9/173.3

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7 109.3/119.3

66.7/ 77.0 128.1/140.9

88.4/102.0 155.2/172.2

70.0/ 70.0

70.0/ 72.9

83.3/ 89.7

80/80

—

†

90/ 90

100/100

125/125

150/150

175/175

012

015

010

—

011

—

102/112

120/131

145/160

82/ 82

87/ 92

108/116

125/136

150/165

80/ 80

85/ 91

012

—

012+017

—

NONE

017

76.0/ 76.0

76.0/ 77.1

88.1/ 93.9

80/80

—

†

459/459

479/479

90/ 90

100/110

125/125

150/150

175/175

012

015

010

—

STD

YES

011

—

012

—

012+017

—

208/230-3-60

NONE

017

73.1/ 73.1

73.1/ 76.0

86.4/ 92.8

80/80

—

†

90/ 90

100/110

125/125

150/150

175/175

012

015

010

—

HIGH STATIC

011

—

106/115

123/135

148/164

012

—

012+017

—

NONE

017

—/—

79.1/ 79.1

79.1/ 80.2

91.2/ 97.0

80/80

—

†

86/ 86

483/483

21.7/ 25.0

33.4/ 38.5

90/100

110/110

125/150

150/150

175/200

012

015

010

—

90/ 96

HIGH STATIC

STD

YES

29.8

15.8

011

51.7/ 59.7 114.1/123.5

66.7/ 77.0 132.9/145.1

88.4/102.0 160.0/176.4

—

111/120

129/140

154/169

012

—

012+017

—

50HJ009

NONE

016

—

37.3

44.4

48.3

65.3

73.1

86.2

40.0

60.0

—

41.0

45.0

61.0

68.0

80.0

233.0

16.7

19.8

33.4

39.7

50.2

011

014

016

013

—

014

80.0

90.0

100.0

015

—

014+016

—

NONE

016

—

40.0

46.5

50.4

67.4

75.2

88.3

45.0

60.0

—

43.0

44.0

47.0

63.0

70.0

82.0

235.0

16.7

19.8

33.4

39.7

50.2

011

014

016

013

—

STD

15.8

YES

014

80.0

90.0

100.0

015

—

014+016

—

460-3-60

NONE

016

—

38.7

45.8

49.7

66.7

74.5

87.6

45.0

60.0

—

42.0

43.0

47.0

62.0

69.0

81.0

245.0

246.0

16.7

19.8

33.4

39.7

50.2

011

014

016

013

—

HIGH STATIC

014

80.0

90.0

100.0

015

—

014+016

—

NONE

016

—

41.4

47.9

51.8

68.8

76.6

89.7

45.0

60.0

—

45.0

49.0

65.0

72.0

84.0

247.0

248.0

16.7

19.8

33.4

39.7

50.2

011

014

016

013

—

YES

014

80.0

90.0

100.0

015

—

014+016

—

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Table 1H — Electrical Data (COBRA™ Energy Recovery 50HJ008-014 Units with 62AQ300) (cont)

HEAT

POWER SUPPLY

SINGLE

POINT BOX

CRSINGLE

---A00

DISCONNECT SIZE*

HEATER

CRHEATER

---A00

NOMINAL

V-PH-Hz

IFM

TYPE

CONV

OUTLET

62AQ

FLA

UNIT

FUSE OR

HACR BKR

FLA

MCA

MOCP

FLA

LRA

NONE

017

—/—

82.8/ 82.8

86.4/ 92.8

128.1/140.9

155.2/172.2

175.0/165.0

—

90/ 90

100/110

150/150

175/175

175/200

†

90/ 90

519/519

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

010

90/ 91

STD

YES

29.8

15.8

29.8

15.8

012

012+017

010+012

123/135

148/164

166/185

NONE

017

—/—

88.8/ 88.8

91.2/ 97.0

132.9/145.1

160.0/176.4

179.8/169.2

87.2/ 87.2

90.8/ 97.2

132.5/145.3

159.6/176.6

179.4/169.4

93.2/ 93.2

95.6/101.4

137.3/149.5

164.4/180.8

184.2/173.6

40.7

45.8

49.7

66.7

87.6

85.0

43.4

47.9

51.8

68.8

89.7

87.1

43.3

48.4

52.3

69.3

90.2

87.6

46.0

50.5

54.4

71.4

92.3

89.7

90.4/ 90.4

90.8/ 97.2

132.5/145.3

159.6/176.6

179.4/169.4

—

45.0

60.0

—

45.0

60.0

—

50.0

60.0

—

50.0

60.0

—

50.0

60.0

—

100/100

110/110

150/150

175/200

200/200

100/100

100/110

150/150

175/200

200/200

100/100

110/110

150/150

175/200

200/200

—

80.0

100.0

110.0

—

80.0

100.0

110.0

—

80.0

100.0

110.0

—

90.0

100.0

110.0

100/100

100/110

150/150

175/200

200/200

100/100

110/110

150/150

175/200

200/200

†

96/ 96

523/523

542/542

547/547

260.0

261.0

262.0

263.0

272.0

274.0

604/604

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

010

96/ 96

012

012+017

010+012

129/140

154/169

172/190

95/ 95

95/ 96

208/230-3-60

NONE

017

—/—

21.7/ 25.0

33.4/3 8.5

66.7/ 77.0

88.4/102.0

104.2/120.3

010

012

HIGH STATIC

STD

128/140

153/169

171/190

101/101

134/145

159/174

177/195

44.0

47.0

62.0

81.0

93.0

47.0

49.0

65.0

84.0

95.0

47.0

50.0

65.0

84.0

96.0

50.0

52.0

68.0

87.0

98.0

012+017

010+012

NONE

017

—/—

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

010

012

YES

012+017

010+012

50HJ012

NONE

016

—

16.7

19.8

33.4

50.2

60.1

011

014

016

013

014

014+016

013+015

NONE

016

—

16.7

19.8

33.4

50.2

60.1

014

011

014

016

013

014

STD

YES

014+016

013+015

460-3-60

NONE

016

—

16.7

19.8

33.4

50.2

60.1

014

011

014

016

013

014

HIGH STATIC

STD

014+016

013+015

NONE

016

—

0.0

014

011

014

016

†

16.7

19.8

33.4

50.2

60.1

013

014

YES

014+016

013+015

NONE

017

—/—

98/ 98

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

010

012

128/140

153/169

171/190

104/104

134/145

159/174

177/195

49.0

50.0

49.0

84.0

96.0

51.0

52.0

51.0

87.0

98.0

012+017

010+012

NONE

017

—/—

96.4/ 96.4

95.6/101.4

137.3/149.5

164.4/180.8

184.2/173.6

44.9

48.4

52.3

48.4

90.2

87.6

47.6

50.5

54.4

50.5

92.3

89.7

609/609

287.0

289.0

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

010

012

STD

YES

012+017

010+012

50HJ014

208/230-3-60

NONE

016

—

70.0

100.0

110.0

—

70.0

100.0

110.0

—

16.7

19.8

16.7

50.2

60.1

014

011

014

016

013

016

STD

014+016

013+015

NONE

016

—

50.0

60.0

—

16.7

19.8

16.7

50.2

60.1

014

011

014

016

013

016

STD

YES

014+016

013+015

LEGEND

Full Load Amps

Example: Supply voltage is 460-3-60.

FLA

—

AB = 452 v

BC = 464 v

AC = 455 v

HACR

IFM

Heating, Air Conditioning and Refrigeration

Indoor (Evaporator) Fan Motor

Locked Rotor Amps

LRA

MCA

MOCP

NEC

452 + 464 + 455

Minimum Circuit Amps

Average Voltage =

Maximum Overcurrent Protection

National Electrical Code

1371

Underwriters’ Laboratories

*Used to determine minimum disconnect per NEC.

†Single point box CRSINGLE017A00 is part of base unit.

= 457

Determine maximum deviation from average voltage.

(AB) 457 – 452 = 5 v

NOTES:

1. In compliance with NEC requirements for multimotor and combination load equipment

(refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall

be fuse or HACR breaker. UL, Canada units may be fuse or circuit breaker.

2. Unbalanced 3-Phase Supply Voltage

(BC) 464 – 457 = 7 v

(AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

Never operate a motor where a phase imbalance in supply voltage is greater than 2%.

Use the following formula to determine the percent of voltage imbalance.

% Voltage Imbalance = 100 x

457

max voltage deviation from average voltage

= 1.53%

= 100 x

average voltage

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your

local electric utility company immediately.

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208/230-3-60

460-3-60

(SIZE 007 ONLY)

208/230-1-60

575-3-60

(SIZE 007 ONLY)

208/230-3-60

575-3-60, 460-3-60

(SIZES 004-006)

208/230-3-60 AND 460-3-60

(SIZES 008-014)

575-3-60

(SIZES 008-014)

LEGEND

— Contactor

COMP — Compressor

IFC

NEC

— Indoor-Fan Contactor

— National Electrical Code

— Terminal Block

Fig. 7 — Power Wiring Connections

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FOR MOISTUREMI$ER UNITS ONLY

Step 9 — Assemble and Mount Supply-Air

Hood — The hood kit supplied with the energy recovery

section is needed to complete this installation. See Fig. 11. The

energy recovery section supply air hood installs around its

motorized damper inlet.

NOTE: Mount the hood sides to the energy recovery section

first, and then the hood top for easier installation. The ther-

mostats are shipped factory-wired and taped behind the

damper blade of the energy recovery section. Knobs and

screws are in hood package.

LIGHT

COMMERCIAL

THERMIDISTAT

ACCESSORY

1. Assemble and mount supply air hood as shown in Fig. 11.

2. Discard the tape that holds the thermostats behind the

damper plates. Mount thermostats to the hood sides of the

energy recovery section unit into the holes provided, with

thermostat terminals facing up. See Fig. 11. Mount out-

side cooling set point thermostat part number

HH22HA060 (white label) on the left side of the hood.

See Fig. 11.

3. Mount the outside heating thermostat part number

HH22HA065 (red label) on the right side of the hood. See

Fig. 11.

62AQ

CONNECTION

BOARD

OPTIONAL

HUMIDISTAT

(HL38MG029)

4. From the outside of the unit’s side panels fasten the

thermostat(s) with two mounting screws, with the quick

connect terminals face up. See Fig. 11.

5. Install thermostat knobs (provided in kit). See Fig. 11.

6. Set supply air quantity (on units with optional factory-

installed supply air fan [GA] or field-installed accessory

supply air fan kit [CRFANKIT001-006A00]). Select the

fan speed and damper position to obtain desired cfm.

Relocate damper stops to the desired position on the

damper support rail and adjust the fan speed by relocating

the wire on the supply fan motor terminal block. Factory

set position is 45 degrees for the damper position, and

medium speed for the motor. Relocate stops to top hole

for 30 degrees, bottom hole for 60 degrees, and remove

stops for 90 degrees (see Fig. 11).

Fig. 8 — Light Commercial Thermidistat

Accessory Low-Voltage Connections

DDC CONTROL

CONNECTION

BOARD

TB3

TB1

24 VAC

RMTOCC

CMPSAFE

FSD

7. Install the aluminum filter screen and end cap with

screws along the top, as shown in Fig. 11.

SFS

NOT USED

Step 10 — Mount the Barometric Relief

Damper — The hood kit supplied with the energy recovery

section is needed to complete this installation. The exhaust air

hood (that includes the barometric relief damper) must be

assembled and installed on the energy recovery section per the

instructions below. See Fig. 12.

Fig. 9 — Low Voltage Connections

(Units with PremierLink™ Controls)

1. Install the barometric relief damper onto the

energy recovery section by mounting the hinge with

2 screws then sliding in the hinge pin. See Fig. 12.

RACEWAY

LOW VOLTAGE

CONNECTIONS

INTEGRATED GAS UNIT

CONTROLLER (IGC)

2. Install damper limiter for 30, 45, or 60 degree angles.

Limiter pin not required for 90-degree setting (set to the

desired position based on CFM requirements and fan

speed). See Fig. 12. Fan speed is adjusted by relocating

wires on fan terminal blocks.

3. Loosen compressor bolts and remove shipping blocks

from under compressor on the 62AQ060 and 62AQ100

sizes only.

4. Install exhaust hood.

5. Install wire guard as shown in Fig. 12.

Never operate the unit without the wire guard in place.

HOLE IN END

PANEL (HIDDEN)

PREMERLINK LOCATION

(OPTIONAL)

Fig. 10 — Field Control Wiring Raceway

(48HJ Shown)

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COOLING — During the unoccupied period, the economizer

mode of operation is used as the first stage of cooling. When

the outside air temperature is below the cooling thermostat set

point, the outside air will be used for first stage cooling.

HEATING — The heating thermostat should be adjusted

to the second stage balance point (heat output of the energy re-

covery section plus the heat output of the first stage on rooftop

unit equals building load at this temperature). Above this set-

ting, first stage heating will be the energy recovery section unit

and second stage will be the first stage of the rooftop unit.

Below this point first stage heating will be the energy recovery

section unit plus first stage heating of the rooftop unit. The sec-

ond stage will be the second stage of the rooftop unit.

Step 11 — Set the Outdoor Cooling and Heat-

ing Thermostats

IMPORTANT: The energy recovery section unit is shipped

with an outdoor thermostat set at 55 F which locks out

mechanical cooling on the RTU (rooftop unit) and the

energy recovery section compressor. If this feature is not

desirable, the rooftop unit’s compressor can be allowed to

run by relocating both gray wires to the same side of the

Low Temperature Lockout Thermostat (LTLO) leaving the

white wire on the opposite pole, locking out only the energy

recovery section compressor. The LTLO is also accessible

by removing the filter access panel and the door of the

damper mounting bracket. Refer to Troubleshooting section.

HOOD TOP

DAMPER BLADE STOP

SHIPPED WITH UNIT

IN 45° POSITION

KNOB

SCREWS (2)

HOOD

SIDE

LTLO

MOUNTING

BRACKET

HEATING POINT

THERMOSTAT

(RED LABEL)

END CAP

COOLING SET POINT

THERMOSTAT (WHITE LABEL)

TEMPERATURE

COOLING

LOCKOUT (LTLO)

HOOD SIDE

TEMPERATURE SWITCH

SHIPPED WITH UNIT

SCREW INSTALLATION (2)

KNOB

ALUMINUM FILTER SCREEN

Fig. 11 — Energy Recovery Section Supply-Air Hood Assembly

HOOD TOP

HOOD SIDE

HINGE

HINGE PIN

BAROMETRIC

RELIEF DAMPER

60° LOCATION

45° LOCATION

HOOD SIDE

WIRE GUARD

30° LOCATION

DAMPER LIMITER

Fig. 12 — Energy Recovery Section Barometric Exhaust Air Hood Assembly

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FOR MOISTUREMI$ER UNITS ONLY

LIGHT COMMERCIAL

THERMIDISTAT ACCESSORY

General — A Light Commercial Thermidistat Accessory

(part number TSTATCCPLH01-B) or PremierLink™ control-

ler with humidistat is required for each unit for field installation

to control the energy recovery section. See Fig. 13.

LIGHT

COMMERCIAL

THERMIDISTAT

ACCESSORY

The Light Commercial Thermidistat is a 7-day programma-

ble, wall-mounted, low-voltage control which combines tem-

perature and humidity control in a single unit. It provides

separate set points for heating and cooling, and adds dehumidi-

fication with separate set points for occupied and unoccupied

periods. Different heating and cooling set points and times

are programmable for up to 4 periods per day and 7 days per

week. The dehumidification output provides direct control of

humidity. During power loss an internal memory stores pro-

grams and settings for unlimited time, and the clock continues

to run for at least 8 hours. Batteries are not used.

Power — Note that this control does not require batteries

and is not “power stealing.” It does require 24 vac (R and C

terminals) from the RTU’s low-voltage transformer to be con-

nected to it for proper operation. The control will not operate

without these 2 connections. See Fig. 14.

OPTIONAL

HUMIDISTAT

(HL38MG029)

Dehumidification Equipment and Connec-

tions — The dehumidification output terminals on the Light

Commercial Thermidistat must be connected to the dehumidify

input terminals on the energy recovery section. Additionally, if

the RTU is equipped with optional MoistureMi$er™ Dehumid-

ification accessory, a relay in the energy recovery section

energizes the MoistureMi$er solenoid to activate the enhanced

dehumidification mode.

Fig. 14 — Light Commercial Thermidistat

Accessory Low-Voltage Connections

Step 1 — Select Light Commercial Thermidis-

tat Location — Light Commercial Thermidistat should be

mounted:

Step 2 — Set DIP Switches — There is a 4-section

DIP switch within the Light Commercial Thermidistat which

must be properly set by the installer. It is easiest to set these

4 switches before the Light Commercial Thermidistat is

mounted to the wall, so complete the following steps first:

• Approximately 5 ft (1.5 m) from floor.

• Close to or in a frequently used room, preferably on an

inside partitioning wall.

• On a section of wall without pipes or ductwork.

1. Open hinged Light Commercial Thermidistat cover.

The Light Commercial Thermidistat should NOT be mounted:

• Close to a window, on an outside wall, or next to a door

leading to the outside.

• Exposed to direct light and heat from a lamp, sun, fire-

place, or other temperature-radiating object that may

cause a false reading.

• Close to or in direct airflow from supply registers and

return-air registers.

2. Remove cover completely by gently snapping it apart at

the hinge.

3. Switches are located in upper right corner of circuit

board. To change switch position, use corner of a small

screwdriver to slide switch to opposite position.

4. After switches have been set, do not reassemble the

2 halves. The rear plastic will be first mounted to wall.

SWITCH 1 — Not used

SWITCH 2 — Not used

• In areas with poor air circulation, such as behind a door

or in an alcove.

SWITCH 3 — SMART/CONVENTIONAL RECOVERY —

Selects between conventional or smart recovery from setback.

Conventional recovery changes to new set point at prepro-

grammed time. Smart recovery, which is active in both heating

and cooling, starts selected cycle 90 minutes earlier and

smoothly adjusts set point so room will arrive at programmed

temperature at programmed time.

NOTE: The occupied output is only energized at the prepro-

grammed time.

To Set:

OFF — for smart recovery. This is factory default.

ON — for conventional recovery.

SWITCH 4 — INSTALLER TEST OFF/ON — Selects a

special installer test mode that assists with checkout and

troubleshooting. See Step 5 — Conduct Light Commercial

Thermidistat Start-Up and Checkout.

HEIGHT (in.)

WIDTH (in.)

DEPTH (in.)

4¹/₄

7¹/₂

1³/₈

To Set:

Fig. 13 — Light Commercial

Thermidistat Accessory

OFF — for normal operation. (Factory default setting.)

ON — for Installer Test mode.

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Step 3 — Install Light Commercial Thermidistat

Step 4 — Set Light Commercial Thermidistat

Configuration (Fig. 15 and 16) — Configuration op-

tions, like DIP switch settings, are intended to be selected at

installation and normally are not modified by the owner. These

options must be made as part of the installation. A special

procedure allows entry into the Configuration mode. While in

configuration mode, up to 10 selections can be made. A

description of each selection and how to use the Configuration

mode are as follows:

Before installing Light Commercial Thermidistat, turn off

all power to Weathermaster® COBRA units. There may be

more than one power disconnect. Electrical shock

can cause personal injury or death. Install lockout tags on

disconnects.

CONFIGURATION OPTIONS — SUMMARY

Option 1 — Anticipator adjustment

1. Turn off all power to equipment. Tag disconnect.

2. If an existing thermostat is being replaced:

a. Remove existing thermostat from wall.

Option 2 — Clean filter timer adjustment

Option 3 — English/Metric selection

Option 4 — Fan (G) ON with W selection

Option 9 — Holiday heat set point

b. Disconnect wires from existing thermostat, one at

a time.

c. As each wire is disconnected, record wire color

and terminal marking.

d. New or additional wire may be needed to accommo-

date added humidity outputs transformer common.

Option 10 — Holiday cool set point

Option 11 — Holiday humidity set point

Option 13 — Room temperature offset adjustment

Option 14 — Heat cool deadband adjustment

Option 21 — Keyboard lock

e. Discard or recycle old thermostat.

TO ENTER CONFIGURATION MODE — Press and hold

FAN button for approximately 10 seconds until COOL set

point display indicates a flashing “01”. The Light Commercial

Thermidistat is now in Configuration mode. It will automati-

cally exit this mode if no button is pressed for 3 minutes. Press-

ing HOLD End button will exit the Configuration mode

immediately.

WHILE IN CONFIGURATION MODE — The upper small

(COOL set point) display indicates selected option number and

large display indicates selection made within that option. One of

these will be flashing. The up and down set point buttons are

used both to move between available options and to make selec-

tion for each option. When option number (small display) is

flashing, the up and down set point buttons allows for scrolling

through options moving between available option numbers.

After desired option number has been selected, press SET

TIME/TEMP button once. The large display will now flash,

indicating that up and down set point buttons now control avail-

able choices within that option. Each press of SET TIME/

TEMP button switches between available option (small display)

and available selections within each option (large display).

Mercury is a hazardous waste and MUST be disposed of

properly.

3. Route wires through large hole in rear plastic. Level rear

plastic (separated from front plastic in Step 2 — Set DIP

Switches, on page 30). Level rear plastic against wall (for

aesthetic value only — Light Commercial Thermidistat

need not be leveled for proper operation) and mark wall

through 2 mounting holes.

4. Drill two ³/₁₆-in. mounting holes in wall where marked.

5. Secure rear plastic to wall with 2 screws and anchors

provided. Additional mounting holes are available for

more secure mounting if needed. Make sure all wires

extend through hole in mounting base.

6. Adjust length and routing of each wire to reach proper

connector block and terminal on mounting base with

¹/₄-in. extra length. Strip only /₄in. of insulation from

Option 1 — Anticipator Adjustment — This adjustment

controls sensitivity and cycle rate of Light Commercial Ther-

midistat. Higher numbers decrease sensitivity and slow cycle

rate. Lower numbers increase sensitivity and cycle rate. Antici-

pator values can range from 1 to 9. Factory default is 3. This

default selection provides optimum performance in nearly all

installations. Try it first; do not change setting unless there is

evidence of need to do so.

each wire to prevent adjacent wires from shorting togeth-

er when connected.

7. Match and connect equipment wires to proper terminals

of each connector block. Remember R and C must be

connected for proper operation (see Fig. 14).

Unlike conventional anticipators, this setting is not deter-

mined by current draw. There is no need to measure, know, or

compensate for current draw. There is also no droop with this

Light Commercial Thermidistat. Regardless of setting and

number of stages, both heating and cooling will control to their

respective set points.

Improper wiring or installation may damage Light

Commercial Thermidistat. Check to make sure wiring is

correct before proceeding with installation or turning on

power. Refer to wiring schematic in the Troubleshooting

section of this manual.

8. Push any excess wire into wall and against rear plastic.

Seal hole in wall to prevent air leaks. Leaks can affect

operation.

9. Reattach Light Commercial Thermidistat body to mount-

ing base by first reattaching hinge.

10. Close Light Commercial Thermidistat assembly, making

sure pins on back of circuit board align with sockets in

connector.

TO ADJUST:

1. Enter Configuration mode. The upper small (COOL set

point) display will be flashing 01. If not, use up and down

set point buttons to move it to 01.

2. Press SET TIME/TEMP button once to flash current

selection of 1, 2, 3, 4, 5, 6, 7, 8, or 9 on large display.

Factory default is 3.

3. Use up and down set point buttons to move to desired

anticipator setting.

4. Press SET TIME/TEMP button again to flash small

upper display for selection of another option, or press

HOLD End to exit Configuration mode.

11. Turn on power to equipment.

On power up, all display segments will light for 2 seconds.

For the next 8 seconds, a 2-digit code appears on LED display

that identifies Light Commercial Thermidistat configuration:

CP — Commercial Product

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Option 4 — Fan (G) On With W — This selection deter-

mines whether fan (G) output is to be ON or OFF when any W

(furnace or strip heat) output is ON. Most furnaces and fan

coils manage their own blowers and do not require separate G

signal. For these applications, select OFF. Some auxiliary heat-

ers require separate G signal to turn on blower. In this case,

select ON. Factory default is OF (off).

PROGRAM

HUMIDITY

MODE

FAN

COPY PREVIOUS

DAY

TO SELECT:

CHANGE DAY

1. Enter Configuration mode. Use up and down set point

buttons to make small display (now flashing) indicate 04.

2. Press SET TIME/TEMP button once to flash large

display.

3. Use up or down set point buttons to alternate between

OFF and ON on large display.

4. Press SET TIME/TEMP button again to flash small

upper display for selection of another option, or press

HOLD End to exit Configuration mode.

DOWN

RESET

FILTER

SET TIME/TEMP

HOLD

End

HOLIDAY

Fig. 15 — Light Commercial Thermidistat Keypad

Mode

Option 9 — Holiday Heat Set Point — This selection deter-

mines the heating set point (40 to 90 minus deadband F) when

the HOLIDAY function is active.

OC1 UN1 OC2 UN2

Mo Tu We Th

Fr Sa Su

HOLD HOLIDAY

DEHUM

OFF

HEAT

COOL

TO SELECT:

COOL

HEAT

TIME

AUTO

1. Enter Configuration mode. Use up and down buttons to

make small display (now flashing) indicate 09.

2. Press SET TIME/TEMP button once to flash large display.

3. Use up or down set point buttons to select desired

temperature.

4. Press SET TIME/TEMP button again to flash small

upper display for selection of another option, or press

HOLD End to exit Configuration mode.

Fan

CLEAN FILTER

ON**

AUTO

PROGRAMMING

Fig. 16 — Light Commercial Thermidistat LCD

Option 10 — Holiday Cool Set Point — This selection deter-

mines the cooling set point (40 to 90 minus deadband F) when

the HOLIDAY function is active.

on Power Up

TO SELECT:

Option 2 — Clean Filter Timer — Select hours of blower

operation (heating, cooling, or fan) before CLEAN FILTER

icon is displayed. With OFF selected, icon will never come on,

disabling this feature. Time selection can range from 400 to

3600 blower operation hours by selecting numbers 1 through 9.

(Time is 400 times number selected.) Factory default is 2

(800 hr). Recommended blower operation hours selections are:

disposable filter — 400 to 800 hr; media filter — 1200 to

1600 hr; electronic air cleaner — 1600 to 2400 hr.

TO SELECT OR ADJUST:

1. Enter Configuration mode. Use up and down set point

buttons to make small display (now flashing) indicate 02.

2. Press SET TIME/TEMP button once to display current

selection of 1, 2, 3, 4, 5, 6, 7, 8, or 9 on large display.

Factory default is 2.

3. Use up and down set point buttons to move between

available choices.

1. Enter Configuration mode if not already there. Use up

and down set point buttons to make small display (now

flashing) indicate 10.

2. Press SET TIME/TEMP button once to flash large display.

3. Use up or down set point buttons to select desired

temperature.

4. Press SET TIME/TEMP button again to flash small up-

per display for selection of another option, or press

HOLD End to exit Configuration mode.

Option 11 — Holiday Humidity Set Point — This selection

determines the humidity set point (50 to 90% rh [relative

humidity]) when the HOLIDAY function is active.

NOTE: This value can only be changed in the installer soft-

ware Configuration mode.

TO SELECT:

1. Enter Configuration mode. Use up and down set point

buttons to make small display (now flashing) indicate 11.

2. Press SET TIME/TEMP button once to flash large display.

3. Use up or down buttons to select desired humidity.

4. Press SET TIME/TEMP button again to flash small

upper display for selection of another option, or press

HOLD End to exit Configuration mode.

Option 13 — Room Temperature Offset Adjust — This op-

tion allows calibration (or deliberate miscalibration) of room

temperature sensor. There are various reasons why building

owners may want to have displayed temperature adjusted to a

higher or lower value. The selected number is number of

degrees, plus or minus, which will be added to actual

temperature. The numbers can range between –5 and +5.

Factory default is 0. This adjusted value will be used as actual

temperature for both display and control action. For example, if

4. Press SET TIME/TEMP button again to flash small

upper display for selection of another option, or press

HOLD End to exit Configuration mode.

Option 3 — English/Metric — Select between Fahrenheit

and Celsius operation. Factory default is Fahrenheit.

TO SELECT OR ADJUST:

1. Enter Configuration mode. Use up and down set point

buttons to make small display (now flashing) indicate 03.

2. Press SET TIME/TEMP button once to flash current se-

lection of F or C. Factory default is F.

3. Use up and down set point buttons to move between F

and C on large display.

4. Press SET TIME/TEMP button again to flash small up-

per display for selection of another option, or press

HOLD End to exit Configuration mode.

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2 is selected, 72 F actual will read 74 F. If set point is 72 F, the

room will control to an actual temperature of 70 F which will

be displayed and acted upon as if it were 72 F. The effect is that

a positive number selection will make the room temperature

lower and vice versa. The Light Commercial Thermidistat is

calibrated within an accuracy of plus or minus 1 degree when

shipped from the factory, so this adjustment will provide the

best accuracy when set to 0.

keypad will be unlocked. The keypad will return to lock

once the keypad is idle for a 2-minute period or immedi-

ately if after exiting the Configuration mode.

4. Press SET TIME/TEMP button again to flash upper

small display for selection of another option, or press

HOLD End to exit Configuration mode.

Step 5 — Conduct Light Commercial Thermi-

distat Start-Up and Checkout — The Light Com-

mercial Thermidistat is designed with a built-in installer test

capability. It allows easy operation of equipment without

delays or set point adjustments to force heating or cooling. To

enable Installer Test mode, move DIP switch no. 4 to ON posi-

tion. To access this switch, open case as described in Step 2 —

Set DIP Switches. Use the tip of a small screwdriver to slide

switch no. 4 to ON position.

TO SELECT:

1. Enter Configuration mode. Use up and down set point

buttons to make small display (now flashing) indicate 13.

2. Press SET TIME/TEMP button once to flash large display.

3. Use up or down set point buttons to move between –5,

–4, –3, –2, –1, 0, 1, 2, 3, 4, or 5 on large display. Factory

default is 0.

While in Installer Test mode, clock will display “InSt,” FAN

button will control fan, and MODE button will control heating

and cooling.

4. Press SET TIME/TEMP button again to flash small

upper display for selection of another option, or press

HOLD End to exit Configuration mode.

TO TEST FAN:

NOTE: In the Installer Test mode the fan operation is not

dependent on the occupied signal.

Option 14 — Heat/Cool Deadband Adjustment — This op-

tion selects the minimum difference between heating and cool-

ing set points. A larger difference saves energy and a smaller

difference decreases temperature difference between heating

and cooling. Factory default is 2, which means cooling set

point must be a minimum of 2 degrees above heating set point.

An attempt to move them closer will result in one “pushing”

the other to maintain the required difference.

Depending on set points, moving deadband closer than

2 degrees may result in regular cycling between heat and cool

when AUTO mode is selected. However, this cycling cannot

occur more often than 1 transition every 10 minutes. The sys-

tem has a built-in requirement that it cannot switch between

heat and cool without a 10-minute “off” time between the 2

operations. Specifically, to switch from one mode to the other,

there must be no demand for the old mode and a demand for

the new mode, and this must exist continually for 10 minutes

before transition to the new mode will occur.

Fan button switches FAN icon between AUTO and ON.

While ON is displayed, G output will be on, turning fan on.

Allow up to 10 seconds after button is pressed for fan to turn on

and off. On all 3 through 12.5 ton RTUs the fan continues to

operate for a minimum of 30 seconds after G signal is

removed.

NOTE: In other than the Installer Test mode the fan will run

continuously during the occupied periods. If auto fan is

selected, the fan will come on with a heating or cooling call

during the unoccupied periods and run continuously during the

occupied periods. The fan icon AUTO will be lit if auto fan is

selected and ON will be lit when the fan is on.

TO TEST COOLING AND DEHUMIDIFICATION:

Press MODE button until COOL icon turns on. Y1 cooling

begins within 10 seconds and remains on for 4 minutes. Two

minutes after Y1 comes on, the Y2 signal is energized for

2 minutes. At the end of 4-minute run, cooling stops and

MODE reverts to OFF. At any time during 4-minute run time,

cooling may be turned off by pressing MODE button until

OFF appears. While cooling is on, successive presses of

HUMIDITY button turns the dehumidify output on and off.

While this output is active, the “DEHUM” icon will be

energized.

TO SELECT:

1. Enter Configuration mode if not already there. Use up

and down set point buttons to make small display (now

flashing) indicate 14.

2. Press SET TIME/TEMP button once to flash large

display.

3. Use up or down set point buttons to move between 0, 1, 2,

3, 4, 5, or 6 on large display. Factory default is 2.

TO TEST PRIMARY HEATING:

4. Press SET TIME/TEMP button again to flash small

upper display for selection of another option, or press

HOLD End to exit Configuration mode.

Option 21 — Keyboard Lock — This option allows the

installer to disable the thermostat from being changed.

Press MODE button until HEAT icon turns on. W1 heating

begins within 10 seconds and remains on for 4 minutes. This

is the Recycling mode and if the outdoor temperature is below

the balance point it will also include first stage furnace or

electric heat in AC system, and heat pump heating in heat

pump system. W1 will be on for 2 minutes followed by second

stage W2 for 2 minutes. If the outdoor temperature is above the

balance point, this second stage call will energize first stage

furnace or electric heat in AC system and heat pump heating

in heat pump system. If the outdoor temperature is below

the balance point this second stage call will energize second

stage furnace or electric heat in AC system and heat pump

system. At the end of 4-minute run, heating stops, and MODE

reverts back to OFF. At any time during 4-minute run time,

heating may be turned off by pressing MODE button until

OFF appears. While heating is on, successive presses of

HUMIDITY button turn Occupied output on and off. While

this output is active, “OC” appears in cool set point display.

TO SELECT:

1. Enter Configuration mode. Use up and down set point

buttons to make small display (now flashing) indicate 21.

2. Press SET TIME/TEMP button once to flash large

display.

3. Use up and down set point buttons to move between OF

and ON on large display. Factory default is OF, keyboard

is active.

NOTE: Once the keyboard is locked the building manag-

er can momentarily unlock the keyboard by pressing the

following keys sequentially, MODE, COPY PREVIOUS

DAY, SET TIME/TEMP, and HOLD End. The sequence

must be completed within a 5-second period, and the

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Step 6 — Make Final Settings — Be sure to return

DIP switch no. 4 back to OFF position to exit Installer Test

mode. Assuming the system is to be left in operation after

installation is complete, use MODE button to select between

HEAT, COOL, or AUTO to provide desired operation of heat-

ing, cooling, or both.

The default set points and programmed schedule are

(ONLY ONE PERIOD IS PROGRAMMED):

OCCUPIED 1 = OCCUPIED 2 = 7:00 AM;

COOL = 76 F; HEAT = 72 F

DISPLAY WILL READ OC2

UNOCCUPIED 1 = UNOCCUPIED 2 = 5:00 PM;

COOL = 85 F; HEAT = 65 F

DISPLAY WILL READ UN2

If programmed schedule is to be used, make sure the HOLD

icon is off. The schedule is energized or deenergized by push-

ing the HOLD End button.

If fixed temperatures are desired, push HOLD End button to

turn on HOLD icon. This will maintain set points, not allowing

them to change with programmed schedule.

During unoccupied periods the FAN button may be used to

select between AUTO (fan on only with equipment) and FAN

(fan on continuously) fan modes. During occupied periods the

fan is on continuously.

DEHUMIDIFICATION — Dehumidification is done only

during cooling. A dehumidification set point is available to the

owner in both occupied and unoccupied times. It can range

from 50 to 90 percent relative humidity. When actual humidity

is higher than set point, a dehumidification demand exists. In the

occupied period, the Light Commercial Thermidistat responds

by activating its dehumidify output (DEHUM) turning on the

compressor in the Energy$Recycler2 unit; and when a call for

cooling exists, energizing the MoistureMi$er™ solenoid in the

48/50HJ unit (if so equipped). The Energy$Recycler2 compres-

sor will be started in the Occupied mode even though a call for

cooling does not exist; thus dehumidifying the outside air before

it enters the building. In the unoccupied period the humidistat

will only energize the MoistureMi$er solenoid in the main unit.

OPERATIONAL INFORMATION

Five-Minute Compressor Time

Guard^®

Device — This timer prevents compressor from starting

unless it has been off for at least 5 minutes. It can be defeated

for 1 cycle by simultaneously pressing FAN and UP buttons

simultaneously.

Fifteen-Minute Staging Timer — In multistage heat-

ing or cooling, this timer prevents any higher stage from turn-

ing on until preceding stage has been on for 15 minutes. This

timer is not in effect if temperature difference is greater than

5° F (usually due to a large change in desired temperature).

Three-Minute Minimum On Time — In normal op-

eration, when a stage turns on, it will not turn off for a mini-

mum of 3 minutes.

Heat/Cool Set Points (Desired Tempera-

ture) — A minimum difference of 2° F is enforced between

heating and cooling desired temperatures. This is done by

allowing one setting to “push” the other to maintain this

difference. This difference is adjustable via Configuration

Option 14.

Equipment On Indicators — When cooling equip-

ment is on, a COOL icon preceded by a small triangle is

displayed below cooling set point. While cooling equipment is

delayed by the Time Guard timer, triangle will flash. The same

is true for HEAT icon and its preceding triangle located under

heating set point.

Dehumidify Output On Indicators — The DEHUM

icon is on when the dehumidification output is energized.

Auto Changeover — When auto changeover mode is

selected, a change from heat to cool (or vice versa) will not oc-

cur until an opposite mode demand has existed for 10 minutes.

If set point is changed, the 10-minute requirement is deleted.

Power On Check — When AC power is first applied, all

segments of display are turned on for a few seconds. Following

this, temperature display indicates model/configuration via fol-

lowing 2-digit code: CP for commercial product. See Fig. 16.

However, if the humidity is below the set point in the

unoccupied period, a “mini” economizer mode will be initiated

bringing in outside air to cool the space as the first stage

of cooling, provided the outdoor air thermostat in the

Energy$Recycler2 unit is below its set point.

Error Codes — If Light Commercial Thermidistat cannot

properly read room temperature, display will indicate two

dashes (--) and all outputs (except fan, if on) will turn off.

E4 — If Light Commercial Thermidistat’s internal memory

fails, “E4” will be displayed. Replace Light Commer-

cial Thermidistat.

E5 — If Light Commercial Thermidistat cannot properly

read humidity, “E5” will be displayed. Replace

Light Commercial Thermidistat.

HOLIDAY — A holiday selection is available specifically for

times where the building will not be occupied for an extended

period. For convenience, one button selects Holiday mode

which is indicated by “HOLIDAY” icon on LED display. Holi-

day mode also has an automatic hold, meaning that set points

are not affected by the programmed schedule. While in Holi-

day mode, the system provides temperature and humidity pro-

tection for the building in all seasons, but not comfort.

Smart Recovery — With Smart Recovery selected (DIP

SW1 is on), transition out of setback begins a fixed time period

before selected recovery time and gradually adjusts room tem-

perature so desired temperature will be achieved at selected

recovery time. The fixed time period is 1.5 hours. It operates in

both heating and cooling.

Holiday Set Points — The settings for HEAT, COOL, and

DEHUM should have been done in the Configuration mode

(Options 9,10, and 11).

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4. Tighten compressor holddown bolts to 5.5 to 6.5 ft-lbs of

torque.

PRE-START-UP

5. Verify the following:

a. If installed, ensure optional supply and exhaust

blower wheel set screws are tight and wheels are

centered within the blower housing.

b. Make sure supply and exhaust air filters are in

place.

c. Make sure the condensate drain is of correct

dimensions and primed with water to ensure

proper drainage.

Failure to observe the following warnings could result in

serious personal injury.

1. Follow recognized safety practices and wear protec-

tive goggles and gloves when checking or servicing

refrigerant system.

2. Do not operate compressor or provide any electric

power to unit unless compressor terminal cover is in

place and secured.

3. Do not remove compressor terminal cover until

all electrical sources are disconnected and tagged

accordingly.

d. Reinstall all access panels.

e. Ensure all tools and miscellaneous parts have been

removed.

4. Relieve all pressure from system before touching

or disturbing any connections inside compressor ter-

minal box. If refrigerant leak is suspected around

compressor terminals, use accepted methods to recov-

er refrigerant.

5. Never attempt to repair or solder any components

while refrigerant system is under pressure.

6. Do not use torch to remove any component. System

contains oil and refrigerant under pressure. To remove

a component, wear protective goggles and gloves and

proceed as follows:

START-UP

Refer to the 48/50HJ Installation Instructions for informa-

tion on Start-Up for the rooftop unit section.

Unit Preparation — Make sure the unit has been in-

stalled in accordance with installation instructions and applica-

ble codes.

Supply and Exhaust Filters — Make sure filters are

correctly installed on unit. Do not operate without filters in

place.

a. Shut off electrical power to unit and tag

disconnect.

b. Recover refrigerant to relieve all pressure from

system, using both high- and low-pressure

ports.

Outdoor-Air Inlet Screens — Outdoor-air inlet screen(s)

must be in place before operating the unit.

Compressor Mounting — Compressors are internally

spring-mounted. Ensure wooden shipping block has been

removed from under the compressor and holddown bolts are in

place.

c. Cut component connection tubing with tubing

cutter, and remove component from unit.

Internal Wiring — Check all low and high voltage con-

d. Carefully unsweat remaining tubing stubs

when necessary. Oil can ignite when exposed to

torch flame.

nections for proper locations. Ensure connections are tight.

Cooling — Set Light Commercial Thermidistat mode selec-

tion to Cooling and fan mode to Auto. Ensure thermostat has

been adjusted to a setting below room temperature. Refer to

Table 2 for correct unit operation.

Refer to 48/50HJ Installation Instructions for Pre-Start-Up

information for the rooftop unit section. Proceed as follows to

inspect and prepare the unit for initial start-up:

Heating — Set Light Commercial Thermidistat mode se-

lection to Heating and fan mode to Auto. Ensure thermostat has

been adjusted to a setting below room temperature. Refer to

Table 2 for correct unit operation.

1. Remove filter access panel, blower access panel, and con-

trol panel access cover on the energy recovery section.

2. Read and follow instructions on all WARNING, CAU-

TION, and INFORMATION labels attached to (or

shipped with) unit.

Operating Sequence — Refer to Step 5 — Conduct

Light Commercial Thermidistat Start-Up and Checkout on

page 33, and Table 2 for energy recovery section operating

sequence. See Fig. 17.

3. Make the following inspections:

a. Inspect for shipping or handling damages such as

broken lines, loose parts, or disconnected wires.

b. Inspect for oil at all refrigerant tubing connections

and on unit base. Detecting oil usually indicates a

refrigerant leak. Leak-test all refrigerant tubing

connections using an electronic leak detector,

halide torch, or liquid-soap solution.

c. Inspect all field and factory wiring connections Be

sure that connections are completed and tight.

d. Inspect upper (supply) and lower (exhaust) coils

for damage and refrigerant leaks. If fin damage is

noted, carefully straighten fins using a fin comb.

SERVICE

Refer to base unit installation instructions or 62AQ Installa-

tion Instruction for all service information.

Fuse Box (48HJ012,014 — 208/230-3-60 Units

Only) — Certain 48HJ units contain a fuses for the power

supply. The fuse box is located in the compressor section in a

single point box. See Fig. 18. Replacement fuses are cartridge

type, non-renewable, time delay FRN type of the appropriate

size and voltage. Refer to existing fuse size and voltage for

replacement.

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ROOFTOP UNIT

ENERGY RECOVERY

SECTION

OUTSIDE AIR

EXHAUST AIR

MIXED AIR

ROOF LINE

ROOM AIR

SUPPLY AIR

Fig. 17 — Unit Operation Flow Diagram

Fig. 18 — Fuse Box (48HJ012, 014 — 208/230-3-60 Units Only)

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Table 2 — Light Commercial Thermidistat (LCT) Operating Sequence and System Response

UNOCCUPIED

COOLING

ER Comp

ER Fans

RT Comp 1

RT Comp 2

RT Fans

RT Heat

Indoor Temperature Above 2nd Stage

Set Point

Humidity Low & OAT Low

Humidity Low & OAT High

Humidity High & OAT Low

Humidity High & OAT High

Off

On (cyc.)

Off

On w/o MM

On w MM

Off

On (cyc.)

Off

w/o MM

On w MM

Off

Indoor Temperature Between 1st and

2nd Stage Set Points

Humidity Low & OAT Low

Humidity Low & OAT High

Humidity High & OAT Low

Humidity High & OAT High

Off

On (cyc.)

Off

On (cyc.)

Off

On w/o MM

On w MM

Off

Indoor Temperature Below 1st Stage

Set Point

Off

NOTE: OAT < 55° all compression off*

HEATING

ER Comp.

ER Fans

RT Comps.

RT Fans

RT Heat

Indoor Temperature Above 1st Set

Point

Off

Indoor Temperature Between 1st and

2nd Stage Set Points

Indoor Temperature Below 2nd Stage

Set Point

Off

On (cyc.)

On, 50%

On, 100%

OCCUPIED

ER Fans

COOLING

ER Comp

RT Comp 1

RT Comp 2

RT Fan

RT Heat

Indoor Temperature Above 2nd Stage

Set Point

Humidity Low & OAT Low

Humidity Low & OAT High

Humidity High & OAT Low

Humidity High & OAT High

On w/o MM

On w MM

On w/o MM

On w MM

Off

On w MM

Indoor Temperature Between 1st and

2nd Stage Set Points

Humidity Low & OAT Low

Humidity Low & OAT High

Humidity High & OAT Low

Humidity High & OAT High

Off

On w/o MM

On w MM

Indoor Temperature Below 1st Stage

Set Point

Humidity Low

Off

Humidity High

NOTE: OAT < 55° all compression off*

HEATING

ER Comp

ER Fans

RT Comps

RT Fans

RT Heat

Indoor Temperature Above 1st Stage

Set Point

Off

Indoor Temperature Between 1st and

2nd Stage Set Points

OAT >Set Pt

Off

On, 50%

OAT <Set Pt

Indoor Temperature Below 2nd Stage

Set Point

OAT >Set Pt

OAT <Set Pt

Off

On, 50%

On, 100%

LEGEND

Comp — Compressor

— Energy Recovery section

OAT

— MoistureMi$er™ Dehumidification Device

— Outdoor-Air Temperature

— Rooftop Unit

Set Pt — Set Point

*Unless unit compressor has been rewired as described in Step 11 (page 29).

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TROUBLESHOOTING

Use Tables 3 and 4, and Fig. 19 and 20 when troubleshooting this unit.

NOTES:

1. If any of the original wire furnished must be replaced, it must be

replaced with Type 90° C wire or its equivalent.

2. Three phase motors are protected under primary single phasing

conditions.

3. Thermostat: HH07AT170, 172.

Subbase: HH93AZ176, 177, 178, and 179.

4. Set heat anticipator at .14 amp for 1st stage and .14 amp for 2nd

stage.

5. Use copper conductors only.

6. TRAN is wired for 230-v unit. If unit is to be run with 208-v power

supply, disconnect BLK wire from 230-v tap (ORN) and connect

to 208-v tap (RED). Insulate end of 230-v tap.

LEGEND

—

Contactor

—

Ignitor

Field Splice

Marked Wire

CAP

CER

Capacitor

IDM

IFC

Induced Draft Motor

Indoor Fan Contactor

Indoor Fan Motor

Compressor Energy Recovery section

Crankcase Heater

Compressor Lockout

Cool Changeover Relay

Heat Changeover Relay

Compressor Motor

Cooling Relay

IFM

IGC

LTLO

LPS

Terminal (Marked)

Terminal (Unmarked)

CLO

COC

COH

COMP

Integrated Gas Unit Control (48HJ only)

Low Temp Cooling Lockout

Low-Pressure Switch

Limit Switch

Terminal Block

Splice

MGV

OATC

OATH

OCR

Main Gas Valve

CTD

Compressor Time Delay

Defrost Board

Outdoor-Air Thermostat (Cool)

Outdoor-Air Thermostat (Heat)

Occupied Relay

Splice (Marked)

DFT

Defrost Thermostat

Damper Motor

Factory Wiring

Field Control Wiring

Field Power Wiring

Accessory or Optional Wiring

To indicate common potential

only. Not to represent wiring.

Outdoor Fan

Defrost Relay

Equipment

OFM

OLR

Outdoor Fan Motor

Overload Relay

EQUIP

FPT

Freeze-Up Protection Thermostat

Fan Relay

Plug Assembly

Quadruple Terminal

Rollout Switch

Fuse

GND

Ground

RVS

SEN

Reversing Valve Solenoid

Sensor

Humidity Relay

HPS

High-Pressure Switch

Heating Relay

Terminal Block

Transformer

TRAN

Hall Effect Sensor

Fig. 19 — Typical Wiring Schematic (Standard Controls)

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Fig. 19 — Typical Wiring Schematic (Standard Controls) (cont)

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BLK

VIO

RED

HK50AA039

TB - 2

SAT

BLU

BLK

PNK

VIO

PNK

VIO

BRN

BLU

BRN

BLK

ORN

PNK

BRN

PremierLink

OAT

Space Temp./ Set

Point Adjustment

RED

BRN

BLU

BRN

RED

YEL

BLU

GRN

YEL

BLU

Indoor Air

Quality Sensor

BRN

BLU

ORN

WHT

PNK

GRA

BLK

Outdoor Air

Quality Sensor

PP/MP

0-20 mA

Relays

COMMS

PWR

RED

BLU

Power Exhaust/Energy Recycler

GRA

ORN

PNK

TB - 3

PNK

WHT GRA

ORN ORN

BRN

YEL

ORN

RED

RMTOCC

GRN

YEL

BLU

WHT

PNK

RED

WHT

BLK

GRA

BLK

TB - 1

RED

WHT

CMPSAFE

FSD

RED

GRA

SFS

ORN

PNK

GRA

TR1

CCN

Comm.

WHT

ACCUSENSOR

EconomiSer2

4 - 20mA

BRN

RTU Terminal

Board

LEGEND

COMMS — Communications

OAT

PWR

SAT

—

Outdoor Air Temperature Sensor

Power

Supply Air Temperature Sensor

Fig. 20 — Typical Wiring Schematic (with PremierLink™ Controls)

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Table 3 — Heating and Cooling Troubleshooting

PROBLEM

CAUSE

REMEDY

Compressor and outdoor fan Power failure.

Call power company.

Replace fuse or reset circuit breaker.

will not start.

Fuse blown or circuit breaker tripped.

Defective thermostat, contactor, transformer, con- Replace component.

trol relay, or capacitor.

Insufficient line voltage.

Incorrect or faulty wiring.

Determine cause and correct.

Check wiring diagram and rewire correctly.

Light Commercial Thermidistat program in UC1

or UC2 mode.

Check Light Commercial Thermidistat program. See Step 5

— Conduct Light Commercial Thermidistat Start-Up and

Checkout on page 33.

Defective fan motor.

Replace fan motor.

Compressor will not start but Faulty wiring or loose connection in compressor Check wiring and repair or replace.

outdoor fan runs.

circuit.

Compressor motor burned out, seized, or internal Determine cause. Replace compressor.

overload open.

Defective run/start capacitor, overload, start relay, Determine cause and replace.

Time Guard® device.

No DEHUM signal from Light Commercial

Thermidistat.

Check for DEHUM signal on Light Commercial Thermidistat

LCD display.

Time Guard device not timed out.

Allow time for Time Guard device to recycle unit.

Compressor cycles (other

than normally satisfying

thermostat).

Refrigerant overcharge or undercharge.

Recover refrigerant, evacuate system, and recharge to

nameplate.

Replace and determine cause.

Determine cause and correct.

Determine cause and replace.

Defective compressor.

Insufficient line voltage.

Blocked outdoor coil or dirty air filter.

Defective run/start capacitor, overload, or start

relay.

Faulty outdoor-fan (cooling) or indoor-fan (heat-

ing) motor or capacitor.

Replace.

Restriction in refrigerant system.

Suction pressure greater than Defective TXV.

Locate restriction and remove.

Replace TXV.

100 psig in Cooling mode.

Excessive head pressure.*

Dirty air filters.

Replace filters.

Dirty coils.

Clean coils.

Refrigerant overcharged.

Air in system.

Condensing air restricted or air short-cycling.

Low refrigerant charge.

Compressor valves leaking.

Restriction in liquid tube.

Recover excess refrigerant.

Recover refrigerant, evacuate system, and recharge.

Determine cause and correct.

Check for leaks; repair and recharge.

Replace compressor.

Head pressure too low.*

Remove restriction.

Excessive suction pressure.* High heat load.

Compressor valves leaking.

Check for source and eliminate.

Replace compressor.

Refrigerant overcharged.

Dirty air filters or coils.

Recover excess refrigerant.

Replace filter, clean coils.

Suction pressure too low.*

Low refrigerant charge.

Metering device or low side restricted.

Insufficient indoor airflow.

Check for leaks; repair and recharge.

Remove source of restriction.

Increase air quantity. Check filter and replace if necessary.

LEGEND

TXV — Thermostatic Expansion Valve

*Energy recovery section uses TXVs with a 100 psig maximum operating pressure (MOP) feature to limit suction pressure

in Cooling mode at high temperatures. Always consult charging chart for correct operating pressures.

Table 4 — Supply-Air Damper Troubleshooting

PROBLEM

CAUSE

REMEDY

Damper does not open; fan(s) off.

OCR not energized (thermostat in Unoccupied

mode).

Check Light Commercial Thermidistat program

settings (see Step 5 — Light Commercial Thermi-

distat Start-Up and Checkout section, page 33).

OCR defective.

Replace OCR.

Damper jammed.

Free damper.

Damper motor defective.

Loose wiring.

Damper jammed.

Replace damper motor.

Check wiring and correct.

Free damper.

Damper will not close.

Motor return spring broken.

Replace motor.

LEGEND

OCR — Occupied Relay

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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 111 Catalog No. 534-80122 Printed in U.S.A. Form 48/50HJ,62AQ-2SIS Pg 42 9-02 Replaces: 48/50HJ,62AQ-1SIS

Book 1

Tab 1a 1b 6a 6b

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ROOFTOP UNIT (RTU) AND ENERGY RECOVERY SECTION (62AQ) START-UP CHECKLIST

(Remove and Store in Job File)

I. PRELIMINARY INFORMATION

RTU

62AQ

COBRA™ ENERGY RECOVERY UNIT MODEL NO.:

SERIAL NO.:

TECHNICIAN:

BASE UNIT MODEL NO.:

DATE:

II. PRE-START-UP (insert checkmark in box as each item is completed)

VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS

CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS

CHECK THAT SUPPLY AND EXHAUST HOODS ARE INSTALLED AND AIR FILTER(S) ARE CLEAN AND IN

PLACE

CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW TIGHTNESS

CHECK PULLEY ALIGNMENT AND BELT TENSION PER INSTALLATION INSTRUCTIONS (62AQ300 BELT

DRIVE EXHAUST FAN AND SUPPLY FAN)

III. START-UP

COMBINED ELECTRICAL (COBRA ENERGY RECOVERY UNIT)

SUPPLY VOLTAGE

COMPRESSOR AMPS

INDOOR FAN AMPS

L1-L2

L2-L3

L3-L1

TEMPERATURES

OUTDOOR-AIR TEMPERATURE

RETURN-AIR TEMPERATURE

ENTERING SUPPLY-AIR (RTU)

LEAVING AIR TEMPERATURE (RTU)

PRESSURES (IN COOLING MODE)

ROOFTOP UNIT

REFRIGERANT SUCTION

PSIG TEMP AT COMPRESSOR

REFRIGERANT DISCHARGE

VERIFY REFRIGERANT CHARGE USING CHARGING CHART LABEL ON UNIT.

62AQ

REFRIGERANT SUCTION

REFRIGERANT DISCHARGE

PSIG TEMP AT COMPRESSOR

VERIFY REFRIGERANT CHARGE USING CHARGING CHART LABEL ON UNIT.

CL-1

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III. START-UP (cont)

AIRFLOWS (62AQ)

SUPPLY AIR

CFM

LOW

MOTOR SPEED (Circle One)

MEDIUM

HIGH

60 90

DAMPER SETTING (°) (Circle One)

EXHAUST AIR

CFM

MOTOR SPEED (Circle One)

DAMPER SETTING (°) (Circle One)

LOW

MEDIUM

HIGH

IV. LIGHT COMMERCIAL THERMIDISTAT ACCESSORY

NOTE: To disable Keyboard Lock, press MODE, COPY PREVIOUS DAY, SET TIME/TEMP, and HOLD End buttons in

sequence within 5 seconds.

PROGRAMMED

Yes

KEYBOARD LOCK

OCCUPIED SETTINGS:

ROOM TEMP

ROOM RH

TIMES:

OC1

OFF

OC2

TIMES:

UC1

UC2

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 111 Catalog No. 534-80122 Printed in U.S.A. Form 48/50HJ,62AQ-2SIS Pg CL-2 9-02 Replaces: 48/50HJ,62AQ-1SIS

Book 1

Tab 1a 1b 6a 6b

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