62MB,MC,MD,ME040-950
Energy Recovery
Ventilators
Installation, Start-Up and
Service Instructions
Untrained personnel can perform the basic maintenance
CONTENTS
functions 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 precautions in the literature, tags and labels attached to
the unit, and other safety precautions that may apply.
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 1
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-58
Step 1 — Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Step 2 — Install Roof Curb . . . . . . . . . . . . . . . . . . . . . . . . 1
• STAND-ALONE APPLICATIONS
Follow all safety codes. Wear safety glasses and work
gloves. These instructions describe how to install, start up, and
service 62M energy recovery ventilator units.
• COUPLED APPLICATIONS
Step 3 — Rigging and Handling . . . . . . . . . . . . . . . . . 45
• MOUNTING THE UNIT INDOORS
Step 4 — Installing ERV Transitions. . . . . . . . . . . . . . . 47
• ERV UNIT COUPLED WITH A 3 TO 12 1/2 TON
HVAC UNIT
Electrical shock can cause personal injury and death. Shut
off all power to this equipment during installation. There
may be more than one disconnect switch. Tag all discon-
nect locations to alert others not to restore power until work
is completed.
Step 5 — Make Electrical Connections . . . . . . . . . . . . 47
• POWER SUPPLY
• ELECTRICAL CONNECTIONS
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59-75
Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Rain Hoods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Energy Recovery Wheel. . . . . . . . . . . . . . . . . . . . . . . . . 59
• DRIVE BELT
INTRODUCTION
The 62M energy recovery ventilator (ERV) units recover
energy from building exhaust air and pre-condition ventilation
air. All ERV units are available in either vertical discharge
(through the bottom) or horizontal discharge configuration.
The 62MB and MC vertical discharge units are used when a
stand-alone ERV unit is required.
The 62MD and ME horizontal discharge unit can be used as
a stand-alone unit, or can also be coupled with a Carrier rooftop
unit.
• AIR SEALS
Blower Rotation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Airflow Settings and Adjustments. . . . . . . . . . . . . . . 59
• FACTORY SETTING
• CURVE SELECTION
• ADJUST THE ERV BLOWER SPEED
• MEASURE MOTOR VOLTAGE, AMPERAGE
AND FAN RPM
INSTALLATION
• BELT MAINTENANCE
Variable Air Volume Option. . . . . . . . . . . . . . . . . . . . . . 74
Operating Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
• OCCUPIED MODE
Step 1 — Inspection — Inspect the unit; file a claim
with the shipping company if the unit is damaged. Check the
packing list to ensure that the correct items have been received
and notify your Carrier representative of any discrepancy.
• UNOCCUPIED MODE
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75-78
Step 2 — Install Roof Curb
Removing Wheel Segments for Cleaning
(62M170-950 Units). . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Removing and Installing Non-Segmented
STAND-ALONE APPLICATIONS — The ERV unit can be
installed without being coupled with a Carrier rooftop unit. The
ERV units can be installed in one of three stand-alone applica-
tions: down discharge, horizontal discharge, or a combination
of both down discharge and horizontal discharge.
When installing a stand-alone ERV unit refer to Fig. 1-45
and, complete the following:
Locate the Roof Curb — Prior to locating the roof curb con-
sider the structural support required for the rooftop system and,
the duct drop location in relation to the joists. Allow sufficient
space for service, clearance, and locations of vents or other
sources of air.
Wheel for Cleaning (62M040 Units). . . . . . . . . . . . 75
Removing and Installing Non-Segmented
Wheel for Cleaning (62M075,120 Units) . . . . . . . 76
Installing Wheel Segments (62M170-950 Units). . . 76
Wheel Drive Motor and Pulley Replacement. . . . . 77
Belt Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78,79
START UP CHECKLIST. . . . . . . . . . . . . . . . . . . . . . . .CL-1
SAFETY CONSIDERATIONS
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.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 536-220 Printed in U.S.A. Form 62M-1SI Pg 1 1-06 Replaces: New
Book 1
4
Tab 10a 12a
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Set the Roof Curb — Fit the roof curb assembly by measuring
across the corners of the curb to ensure a square fit. Set the roof
curb over the roof opening. Level the curb by placing shims
under the bottom flange of the curb. Secure the curb in place by
welding or fastening the curb to the roof.
Refer to Fig. 2 and 3 to determine the duct size required.
Provide field manufactured duct and place into the supply and
return openings in the curb.
Install Gaskets — The ERV roof curbs come with a gasketing
package to provide a seal between the ERV unit and the top
perimeter of the roof curb. Install the gasket around the top
perimeter of the curb and around the supply and return
opening. (Some stand-alone curbs will not have duct open-
ings.) Gasket strips must fit tightly together, leaving no gaps for
leakage.
IMPORTANT: The ERV roof curb must be set in
precisely the correct location relative to the rooftop
roof curb for the transitions to connect properly. See
Fig. 7-44 for location dimensions.
IMPORTANT: Gasket installation is critical for water
integrity. Improperly installed gaskets can result in air
or water leaks, leading to poor unit performance.
Install Ductwork — Ductwork will be installed in the roof
curb for vertical, coupled applications. The duct will hang from
the top of the curb.
NOTE: Ductwork must be installed before the rooftop unit is
set in place.
NOTE: Ductwork must be installed before the ERV unit is set
in place.
Install Roofing Materials — Insulate and add a cant strip to
the roof curb. Follow suggested and acceptable roofing proce-
dures for applying roofing materials. The roofing material
should extend up to the wood nailer and be secured under the
counter flashing. Follow all local, national, and industry roof-
ing standards. Refer to Fig. 5 for roofing recommendations.
24.09
SUPPLY
1.00
TYP. 4X
10.81
22.94
RETURN
14.00
11.50
3.00
TYP. 4X
11.00
NOTES:
1. All dimensions are in inches.
2. Roof curb shipped unassembled.
Fig. 2 — Roof Curb — 62M040 for Stand-Alone Applications
3
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Typical Insulated deck pans.
(Insulation face up) *
D
S/A
E
F
C
R/A
G
H
B
LEGEND
R/A — Return Air
S/A — Supply Air
A
*IMPORTANT: Insulation on deck pans must face up.
NOTE: Roof curb shipped unassembled.
DIMENSIONS (in.)
CURB
PART NO.
62M UNIT SIZE
Duct Sizes
A
B
C
D
E
F
G
H
Return
13.75 x 14.38
17 x 23.5
Supply
13.75 x 11
17 x 19
075,120
170-285
330-640
750,950
62M-A-CRB-14S
62M-B-CRB-14S
62M-C-CRB-14S
62M-D-CRB-14S
27
30.5
49.63 14
60.34 14
14
14
11.3
19.5
23.41
42.13
1
2
2
2
14.7
24
30
1.5
1.75
—
45.5
55.41
86.25
17.5
24.84
32.5
24.5 x 29.5
32 x 41.75
24.5 x 23
32 x 41.75
95.7
14
42.13
—
Fig. 3 — Roof Curb — 62M075-950 for Vertical Stand-Alone Applications
C
ERV Curb
B
D
A
LEGEND
Energy Recovery Ventilator
NOTE: Roof curb shipped unassembled.
DIMENSIONS (in.)
CURB
62M UNIT SIZE
PART NO.
ERV
—
A
27
49.63
60.34
95.7
B
30.5
14
C
14
45.5
D
1.5
1.75
1.75
1.75
075,120*
170-285†
330-640
750,950
62M-A-CRB-14S
62M-B-CRB-14S
62M-C-CRB-14M
62M-D-CRB-14M
14
14
55.41
86.25
*62M075,120 curb is shipped with deckpans insulation and duct supports which may
be discarded.
†62M170-285 curb is shipped with deck pans and insulation.
Fig. 4 — Roof Curb — 62M075-950 for Horizontal Stand-Alone Applications
or Units Coupled with Rooftop Units 15 Tons and Above
4
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ERV Curb
C
Must be Watertight
Locator pieces to connect
ERV curb to rooftop unit curb
B
D
A
E
LEGEND
Energy Recovery Ventilator
NOTE: Roof curb shipped unassembled.
ERV
—
DIMENSIONS (in.)
CURB
PART NO.
62M UNIT SIZE
A
B
C
D
E
075,120
170-285
62M-A-CRB-14MC
62M-B-CRB-14MC
30.5
49.63
14
14
27
45.5
1.5
19.81
1.75 37.81
Fig. 5 — Roof Curb — 62M075-285 Units 3 to 121/2 Ton Rooftop Units
GASKETING
ROOF CURB
NAIL*
RIGID
INSULATION*
FLASHING*
CANT STRIP*
ROOF FELT*
ROOF DECK*
ROOF*
*Field provided.
Fig. 6 — Roofing Materials — Recommendation
5
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6
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7
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8
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9
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10
11
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12
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13
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14
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15
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RooftopUnit
Filteraccessdoor
shippedwithRooftop
Unit
62M040Unit
Outsideairhood
withaluminum
waterentrain-
mentfilter.
Includesbaro-
metricintake
damper.
Evaporation
Coil
Exhaust
hood
Filter
Filters
AccessoryERV
Equipmentsupport
StandardRooftop
Unitroofcurb
EXH
TRANSITION DETAIL
Supply
Blower
Panelcovering
returnchamber
3to6TonRooftopUnit
Outside
airhood
Filter
ERV
wheel
AccessoryTransition
ROOF CURB LOCATION DETAIL
3”
Accessdoorto
adjustbalancing
damper
To62M040Unit
Balancingdamper
Supply
A
A
Return
35”
673/8”
ERV
Unit
Support
Rooftop
Unit
Curb
35"
AccessoryERV
Equipmentsupport
Side View A-A
RooftopCurb
LEGEND
37”
ERV — Energy Recovery Ventilator
Top View
ROOFTOP UNIT MODEL
48/50HJ,TJ,TM
ROOFTOP SIZE
TRANSITION P/N
62M-AATR-HJ36-D
ROOFTOP ECONOMIZER
62MA-900---004
ERV EQUIPMENT SUPPORT P/N
62MA-900---001
004-007
Fig. 17 — 62MD,ME040 Coupled with Carrier 48/50HJ,TJ,TM004-007 Vertical Discharge Rooftop Unit
16
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RooftopUnit
Filteraccessdoor
shippedwithRooftop
Unit
62M040Unit
Outsideairhood
withaluminum
waterentrain-
mentfilter.
Includesbaro-
metricintake
damper.
Field-Supplied
Duct
Exhaust
hood
Filter
AccessoryERV
Equipmentsupport
StandardRooftop
Unitroofcurb
EXH
TRANSITION DETAIL
Supply
Blower
Panelcovering
returnchamber
3to6TonRooftopUnit
Outside
airhood
Filter
ERV
wheel
AccessoryTransition
ROOF CURB LOCATION DETAIL
3”
Accessdoorto
adjust balancing
damper
To62M040Unit
Balancingdamper
Supply
Return
A
A
35”
673/8”
ERV
Unit
Support
Rooftop
Unit
Curb
35"
AccessoryERV
Equipmentsupport
Side View A-A
RooftopCurb
LEGEND
ERV — Energy Recovery Ventilator
37”
ROOFTOP UNIT MODEL
48/50HJ,TJ,TM
ROOFTOP SIZE
TRANSITION P/N
62M-AATR-HJ36-D
ROOFTOP ECONOMIZER
62MA-900---008
ERV EQUIPMENT SUPPORT P/N
004-007
62MA-900---001
Fig. 18 — 62MD,ME040 Coupled with Carrier 48/50HJ,TJ,TM004-007 Horizontal Discharge Rooftop Unit
17
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RooftopUnit
AccessoryTransition
(Includesfrontpanel)
RooftopUnit
Supply
Return
TRANSITION DETAIL
AccessoryERV
Equipmentsupport
AccessoryTransition
2Piecefront
panelcovers
returnchamber
Filter
ERV
wheel
Filter
62M040Unit
Exhaust
hood
Outsideairhood
Top View
ROOF CURB LOCATION DETAIL
To62M040Unit
Accessdoorto
adjust balancing
damper
35”
805/16”
A
A
4411/16”
Return
Supply
ERV
Unit
Support
Rooftop
Unit
Curb
35"
43/8”
RooftopCurb
Side View A-A
LEGEND
ERV — Energy Recovery Ventilator
AccessoryERV
Equipmentsupport
ROOFTOP UNIT MODEL
48/50PG
ROOFTOP SIZE
TRANSITION P/N
62M-AATR-HJ36-D
ERV EQUIPMENT SUPPORT P/N
03-07
62MA-900---001
Fig. 19 — 62MD,ME040 Coupled with Carrier 48/50PG03-07 Vertical Discharge Rooftop Unit
18
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RooftopUnit
AccessoryTransition
(Includesfrontpanel)
RooftopUnit
TRANSITION DETAIL
AccessoryERV
Equipmentsupport
AccessoryTransition
2Piecefront
panelcovers
returnchamber
Filter
ERV
wheel
Filter
62M040Unit
Exhaust
hood
Outsideairhood
TopView
ROOF CURB LOCATION DETAIL
To62M040Unit
Accessdoorto
adjust balancing
damper
35”
805/16”
A
A
4411/16”
ERV
Unit
Support
Rooftop
Unit
Curb
35"
43/8”
RooftopCurb
Side View A-A
LEGEND
ERV — Energy Recovery Ventilator
AccessoryERV
Equipmentsupport
ROOFTOP UNIT MODEL
48/50PG
ROOFTOP SIZE
TRANSITION P/N
62M-AATR-HJ36-D
ERV EQUIPMENT SUPPORT P/N
03-07
62MA-900---001
Fig. 20 — 62MD,ME040 Coupled with Carrier 48/50PG03-07 Horizontal Discharge Rooftop Unit
19
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ROOF CURB LAYOUT
TOP VIEW
673/8"
A
Supply
Standard roof curb for
3 to 6 ton rooftop unit
Air
373/16"
Return
Air
3"
35
"
343/8"
36"
62MA-900---001
Equipment Support
A
"A-A" SIDE VIEW
Standard Roof curb
for3 to 6 tonrooftop unit
35
"
62MA-900---001
Equipment Support
14"
Roof
10.4"
Fig. 21 — 62MD,ME040 Coupled with Carrier 48/50HJ,TJ,TM004-007 Rooftop Unit
20
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Filter door shipped
with Rooftop unit.
62M ERV Unit
Rainhoods for
optional economizer
Rooftop unit
Unit curb
Rooftop unit
AccessoryTransition
62M075,120 ERV Unit
Locator
pieces
(included with
ERV curb,
ERV curb
must be watertight)
SUPPLY
ROOF CURB LOCATION DETAIL
B
Rooftop
Unit curb
Locator Pieces ( included with ERV Curb)
Cover panel provided
30.5”
LEGEND
Energy Recovery Ventilator
A
ERV
—
NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed economizer
cannot be used. Use the 62M economizer instead.
27”
2 3/4"
20"
ERV curb
DIMENSIONS (in.)
ROOFTOP UNIT
MODEL
ROOFTOP
ROOFTOP SIZE
TRANSITION P/N
ERV CURB P/N
ECONOMIZER
A
B
373/16
50
004-007
008,009
012,014
62M-ATR-HJ36-D
62M-ATR-HJ78-D
62M-ATR-HJ1012-D
62M-A-CRB-14MC
62M-A-CRB-14MC
62M-A-CRB-14MC
62MA-900---004
62MA-900---005
62MA-900---006
673/8
781/4
781/4
48/50HJ,TF,TJ,TM
50
Fig. 22 — 62MD,ME075,120 Coupled with Carrier 48/50HJ,TF,TJ,TM004-014 Vertical Discharge Rooftop Unit
21
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Filter door shipped
with Rooftop unit.
62M ERV Unit
Horizontal supply and
return duct (field supplied)
Rooftop unit
Rooftop Unit
Accessory Transition
62M075,120
ERV Unit
Locator
pieces
(included with
ERV curb,
ERV curb
must be watertight)
Optional Horizontal
Economizer
ROOF CURB LOCATION DETAIL
B
Rooftop
Unit curb
Locator Pieces ( included with ERV curb)
Cover panel provided
LEGEND
Energy Recovery Ventilator
30.5"
A
ERV
—
NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed economizer
cannot be used. Use the 62M economizer instead.
27"
2 3/4"
20"
ERV curb
DIMENSIONS (in.)
ROOFTOP UNIT
MODEL
ROOFTOP
ROOFTOP SIZE
TRANSITION P/N
ERV CURB P/N
ECONOMIZER
A
B
373/16
50
004-007
008,009
012,014
62M-ATR-HJ36-H
62M-ATR-HJ78-H
62M-ATR-HJ1012-H
62M-A-CRB-14MC
62M-A-CRB-14MC
62M-A-CRB-14MC
62MA-900---008
62MA-900---009
62MA-900---010
673/8
781/4
781/4
48/50HJ,TF,TJ,TM
50
Fig. 23 — 62MD,ME075,120 Coupled with Carrier 48/50HJ,TF,TJ,TM004-014 Horizontal Discharge Rooftop Unit
22
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Rooftop Unit
Rooftop Unit
Accessory Transition
(Includes frontpanel)
62M ERV Unit
Supply
Return
Accessory
Transition
Locator
pieces
(included with
ERV curb,
ERV Wheel
ERV Curb
must be watertight)
62M075,120 ERV Unit
LEGEND
ERV
—
Energy Recovery Ventilator
NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed econo-
mizer cannot be used.
TOP VIEW
ROOF CURB LOCATION DETAIL
20"
A
ERV Curb
30 1/12"
CurbDetail
A
A
B
ERV
Unit
Curb
Rooftop
Unit
Curb
27"
20"
Return
Supply
2 3/4"
SideViewA-A
Rooftop Unit Curb
Locator pieces
(included with
ERV Curb)
DIMENSIONS (in.)
ROOFTOP MODEL
48/50PG
ROOFTOP SIZE
62M TRANSITION
ERV CURB
A
805/16
923/4
B
4411
5315
03-07
08-14
62M-ATR-PG26-D
62M-ATR-PG712-D
62M-A-CRB-14MC
62M-A-CRB-14MC
/
/
16
16
Fig. 24 — 62MD,ME075,120 Coupled with Carrier 48/50PG03-14 Vertical Discharge Rooftop Unit
23
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Rooftop Unit
Rooftop Unit
Accessory Transition
(Includes front panel)
62M Unit
Accessory
Transition
Locator
pieces
(included with
ERV curb,
ERV Wheel
ERV Curb
must be watertight)
62M075-120 ERV Unit
LEGEND
Energy Recovery Ventilator
ERV
—
NOTE: When using a 62M ERV unit coupled with
a Carrier rooftop unit, the rooftop factory or field-
installed economizer cannot be used.
TOP VIEW
ROOF CURB LOCATION DETAIL
20"
A
ERV Curb
30 1/12"
CurbDetail
A
A
B
ERV
Unit
Curb
Rooftop
Unit
Curb
27"
20"
2 3/4"
SideViewA-A
Rooftop Unit Curb
Locator pieces
(included with
ERV Curb)
DIMENSIONS (in.)
ROOFTOP MODEL
48/50PG
ROOFTOP SIZE
62M TRANSITION
ERV CURB
A
805/16
923/4
B
4411
5315
03-07
08-14
62M-ATR-PG26-H
62M-ATR-PG712-H
62M-A-CRB-14MC
62M-A-CRB-14MC
/
/
16
16
Fig. 25 — 62MD,ME075,120 Coupled with Carrier 48/50PG03-14 Horizontal Discharge Rooftop Unit
24
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Filter door shipped with
Rooftop unit
62M ERV Unit
Rainhoods for
optional economizer
Rooftop unit
Rooftop curb
Top View
Rooftop
Unit
Locator Pieces
(included with ERV curb,
must be watertight)
ERV Curb
AccessoryTransition
62M170-285 ERV Unit
SUPPLY
Rooftop
Unit curb
ROOF CURB LOCATION DETAIL
B
Locator Pieces ( included with ERV curb)
Cover panel provided
ERV curb
49 5/8"
A
45 1/2"
LEGEND
2 3/4"
ERV
—
Energy Recovery Ventilator
38"
NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed economizer
cannot be used. Use the 62M economizer instead.
Top View
DIMENSIONS (in.)
ROOFTOP UNIT
MODEL
ROOFTOP
ROOFTOP SIZE
TRANSITION P/N
ERV CURB P/N
ECONOMIZER
A
B
373/16
50
004-007
008,009
012,014
62M-BTR-HJ36-D
62M-BTR-HJ78-D
62M-BTR-HJ1012-D
62M-B-CRB-14MC
62M-B-CRB-14MC
62M-B-CRB-14MC
62MA-900---004
62MA-900---005
62MA-900---006
673/8
781/4
781/4
48/50HJ,TF,TJ,TM
50
Fig. 26 — 62MD,ME170-285 Coupled with Carrier 48/50HJ,TF,TJ,TM004-014 Vertical Discharge Rooftop Unit
25
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Filter door shipped
with Rooftop unit.
Rooftop Unit
62M ERV Unit
Optional
Horizontal
Economizer
Locator
pieces
Top View
Rooftop
Unit
(included with
ERV curb,
must be watertight)
Horizontal
Return duct
ERV Curb
(field supplied)
AccessoryTransition
62M170-285 ERV Unit
Rooftop
Unit curb
ROOF CURB LOCATION DETAIL
B
Locator Pieces ( included with ERV Curb)
Cover Panel provided
ERV curb
49 5/8"
A
45 1/2"
LEGEND
ERV
—
Energy Recovery Ventilator
2 3/4"
38"
NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed economizer
cannot be used. Use the 62M economizer instead.
Top View
DIMENSIONS (in.)
ROOFTOP UNIT
MODEL
ROOFTOP
ROOFTOP SIZE
TRANSITION P/N
ERV CURB P/N
ECONOMIZER
A
B
373/16
50
004-007
008,009
012,014
62M-BTR-HJ36-H
62M-BTR-HJ78-H
62M-BTR-HJ1012-H
62M-B-CRB-14MC
62M-B-CRB-14MC
62M-B-CRB-14MC
62MA-900---008
62MA-900---009
62MA-900---010
673/8
781/4
781/4
48/50HJ,TF,TJ,TM
50
Fig. 27 — 62MD,ME170-285 Coupled with Carrier 48/50HJ,TF,TJ,TM004-014 Horizontal Discharge Rooftop Unit
26
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Rooftop Unit
AccessoryTransition
62M ERV unit
LEGEND
ERV
—
Energy Recovery Ventilator
NOTES:
1. The 62M ERV unit cannot be coupled with
horizontal return 48/50TJ,TM016-028 and
48/50HJ015,017 units.
Unit curb
2. The ERV unit can be used with a factory-
installed economizer, if desired.
ERV curb
TOP VIEW
SIDE VIEW
15 to 25 Ton RooftopUnit
Rooftop Unit
62M170-285
ERV Unit
62M170-285
ERV Unit
Accessory
Transition
*Optional
Economizer
Transition
ROOF CURB LOCATION DETAIL
Rooftop Unit Curb
ERV Curb
A
A
45 1/2"
ERV
Unit
Curb
74 1/4"
Rooftop
44 3/4"
Unit
Curb
18 11/16"
44 3/4"
49 5/8"
67 1/16"*
SIDE VIEW A-A
TOP VIEW
*Length is 891/16″ for 48/50TM028 units.
ROOFTOP UNIT
ROOFTOP SIZE
TRANSITION P/N
ERV CURB P/N
MODEL
48/50TJ,TM
48/50HJ
016-028
015,017
62M-BTR-HJ1525-D
62M-BTR-HJ1525-D
62M-B-CRB-14S
62M-B-CRB-14S
Fig. 28 — 62MD,ME170-285 Coupled with Carrier 48/50TJ,TM016-028
and 48/50HJ015,017 Vertical Discharge Rooftop Unit
27
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Rooftop Unit
Rooftop Unit
Accessory Transition
(Includes front panel)
62M ERV Unit
Supply
Return
Accessory
Transition
Locator
pieces
(included with
ERV curb,
must be watertight)
ERV Wheel
ERV Curb
62M170-285 ERV Unit
LEGEND
ERV
—
Energy Recovery Ventilator
NOTE: When using a 62M ERV unit coupled with a Carrier roof-
top unit, the rooftop factory or field-installed economizer cannot
be used.
TOP VIEW
ROOF CURB LOCATION DETAIL
A
38 3/4"
ERV Curb
49 5/8"
CurbDetail
A
A
ERV
Unit
Curb
Rooftop
Unit
Curb
B
38 3/4"
45 1/2"
Return
Supply
SideViewA-A
0"
Rooftop Unit Curb
Locator pieces
(included with
ERV Curb)
DIMENSIONS (in.)
ROOFTOP MODEL
48/50PG
ROOFTOP SIZE
62M TRANSITION
ERV CURB
A
805/16
923/4
B
4411
5315
03-07
08-14
62M-BTR-PG26-D
62M-BTR-PG712-D
62M-A-CRB-14MC
62M-A-CRB-14MC
/
/
16
16
Fig. 29 — 62MD,ME170-285 Coupled with Carrier 48/50PG03-14 Vertical Discharge Rooftop Unit
28
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Rooftop Unit
Rooftop Unit
Accessory Transition
(Includes frontpanel)
62M ERV Unit
Accessory Transition
Locator
pieces
(included with
ERV curb,
ERV Wheel
ERV Curb
must be watertight)
62M170-285 ERV Unit
LEGEND
Energy Recovery Ventilator
ERV
—
NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed economizer
cannot be used.
TOP VIEW
ROOF CURB LOCATION DETAIL
A
38 3/4"
ERV Curb
49 5/8"
CurbDetail
A
A
ERV
Unit
Curb
Rooftop
Unit
Curb
B
38 3/4"
45 1/2"
SideViewA-A
0"
Rooftop Unit Curb
Locator pieces
(included with
ERV Curb)
DIMENSIONS (in.)
ROOFTOP MODEL
48/50PG
ROOFTOP SIZE
62M TRANSITION
ERV CURB
A
805/16
923/4
B
4411
5315
03-07
08-14
62M-BTR-PG26-H
62M-BTR-PG712-H
62M-B-CRB-14MC
62M-B-CRB-14MC
/
/
16
16
Fig. 30 — 62MD,ME170-285 Coupled with Carrier 48/50PG03-14 Horizontal Discharge Rooftop Unit
29
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Rooftop Unit
Outside Air Hood (See Note 2)
62M ERV Unit
Rooftop Unit
Curb
Horizontal /Return Duct
(field supplied)
Accessory
Transition
Rooftop Unit
Accessory
Transition
ERV Curb
62M170-285 ERV Unit
LEGEND
ERV
O/A
—
—
Energy Recovery Ventilator
Outdoor Air
O/A Hood
NOTES:
1. The ERV unit can be used with a factory-
installed economizer, if desired.
2. Transition includes a new outside air hood,
which allows air intake through the front of the
hood rather than the bottom. The new hood will
use the filters from the original rooftop unit
hood.
Relief Hood
Top View
ROOF CURB LOCATION DETAIL
Rooftop Unit Curb
44 3/4”
ERV Curb
A
49 5/8”
CurbDetail
ERV
Unit
Curb
Rooftop
Unit
Curb
A
A
44 3/4"
B
45 1/2”
SideViewA-A
Top View
DIMENSIONS (in.)
ROOFTOP MODEL
ROOFTOP SIZE
62M TRANSITION
ERV CURB
A
B
48/50PG
48/50HJ
20-28
62M-BTR-HG1525-H
62M-BTR-HG1525-H
62M-B-CRB-14MC
62M-B-CRB-14MC
114.4
114.4
78.6
78.6
020-028
Fig. 31 — 62MD,ME170-285 Coupled with Carrier 48/50PG20-28
and 48/50HJ020-028 Horizontal Discharge Rooftop Unit
30
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Rooftop Unit
Outside Air Hood (See
Note 2)
62M ERV Unit
Standard HVAC Unit
Roofcurb
Accessory
Transition
Rooftop Unit
ERV Curb
Accessory
Transition
62M170-285 ERV Unit
LEGEND
ERV
O/A
—
—
Energy Recovery Ventilator
Outdoor Air
NOTES:
1. The ERV unit can be used with a factory-
installed economizer, if desired.
2. Transition includes a new outside air hood,
which allows air intake through the front of
the hood rather than the bottom. The new
hood will use the filters from the original
rooftop unit hood.
O/A Hood
Top View
Relief Hood
ROOF CURB LOCATION DETAIL
Rooftop Unit Curb
44 3/4”
A
49 5/8”
CurbDetail
ERV
Unit
Curb
Rooftop
Unit
Curb
A
A
44 3/4"
45 1/2”
B
SideViewA-A
ERV Curb
Top View
DIMENSIONS (in.)
ROOFTOP MODEL
ROOFTOP SIZE
62M TRANSITION
ERV CURB
A
B
48/50PG
48/50HJ
20-28
62M-BTR-HG1525-D
62M-BTR-HG1525-D
62M-B-CRB-14MC
62M-B-CRB-14MC
114.4
114.4
78.6
78.6
020-028
Fig. 32 — 62MD,ME170-285 Coupled with Carrier 48/50PG20-28
and 48/50HJ020-028 Vertical Discharge Rooftop Unit
31
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Filter access door
shippedwith
transition
62M ERV Unit
Rooftop Unit
Outside air hood
for optional
economizer
Accessory
Transition
Top View
Rooftop Unit
ERV Curb
Accessory
Transition
62M330-640 ERV Unit
LEGEND
ERV
O/A
—
—
Energy Recovery Ventilator
Outdoor Air
NOTE: When using a 62M ERV unit coupled with a
Carrier rooftop unit, the rooftop factory or field-
installed economizer cannot be used. Use the 62M
economizer instead.
Supply
O/Ahood
Outside air hood
for optional
economizer
Exhaust hood
ROOF CURB LOCATION DETAIL
Rooftop Unit curb
ERV curb
781/4"
ERV
Unit
Curb
Rooftop
Unit
Curb
331/2"
A
A
5513/32"
Supply
Side View A-A
9"
50"
6011/32"
331/2"
Top View
ROOFTOP UNIT MODEL ROOFTOP SIZE
48/50HJ,TF,TJ,TM 012,014
TRANSITION P/N
62M-CTR-HJ1012-D
ERV CURB P/N
62M-C-CRB-14M
ROOFTOP ECONOMIZER
62MA-900---006
Fig. 33 — 62MD,ME330-640 Coupled with Carrier 48/50HJ,TF,TJ,TM012,014 Vertical Discharge Rooftop Unit
32
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Filter access door
shippedwith
transition
Rooftop Unit
62MERVUnit
LEGEND
Horizontal
ERV
O/A
R/A
S/A
—
—
—
—
Energy Recovery Ventilator
Outdoor Air
supply duct
Return Air
(field supplied)
Supply Air
NOTE: When using a 62M ERV unit cou-
pled with a Carrier rooftop unit, the rooftop
factory or field-installed economizer cannot
be used. Use the 62M economizer instead.
Horizontal
return(field
supplied)
Accessory
Transition
ERV Curb
Top View
Rooftop Unit
Top View
with Economizer
Accessory
Transitions
62M330-640
ERV Unit
Accessory
Transitions
62M 330-640 ERV Unit
10 to 12 1/2 Ton
Rooftop Unit
O/Ahood
S/A
Duct
Optional
Horizontal
Economizer
S/A
R/A
Duct
R/A
Exhaust hood
Exhaust hood
ROOF CURB LOCATION DETAIL
Rooftop Unit curb
ERV Curb
781/4"
ERV
Unit
Curb
Rooftop
Unit
Curb
331/2"
5513/32"
A
A
Side View A-A
9"
6011/32"
50"
331/2"
Top View
ROOFTOP UNIT MODEL
48/50HJ,TF,TJ,TM Without Economizer
48/50HJ,TF,TJ,TM With Economizer
ROOFTOP SIZE
012,014
TRANSITION P/N
62M-CTR-HJ1012-H
62M-CTR-HJ1012-HEC
ERV CURB P/N
62M-C-CRB-14M
62M-C-CRB-14M
ROOFTOP ECONOMIZER
—
012,014
62MA-900---010
Fig. 34 — 62MD,ME330-640 Coupled with Carrier 48/50HJ,TF,TJ,TM012,014 Horizontal Discharge Rooftop Unit
33
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Rooftop Unit
LEGEND
62M ERV Unit
ERV
O/A
—
—
Energy Recovery Ventilator
Outdoor Air
NOTES:
1. The ERV unit can be used with a factory-
installed economizer, if desired.
2. The ERV cannot be coupled with a hori-
zontal return 48/50TJ,TM or HJ 15 to
25 ton rooftop unit.
Rooftop Unit Curb
Accessory
Transition
ERV curb
Rooftop Unit
Accessory
Transition
TJ/HJ15to25Ton
RooftopUnit
Accessory
Transition
62M ERV Unit
62M330-640
ERV Unit
Optional
Economizer
O/Ahood
Exhaust hood
SideView
Top View
ROOF CURB LOCATION DETAIL
Rooftop Unit Curb
ERV curb
ERV
Unit
Curb
Rooftop
Unit
Curb
A
A
5513/32"
53 3/4"
74 1/4"
SideViewA-A
11 1/2"
53 3/4"
6011/32"
67 1/16"*
Top View
*Length is 891/16″ for 48/50TM028 units.
ROOFTOP UNIT
MODEL
ROOFTOP SIZE
TRANSITION P/N
ERV CURB P/N
48/50TJ,TM
48/50HJ
016-028
015,017
62M-BTR-HJ1525-D
62M-BTR-HJ1525-D
62M-B-CRB-14S
62M-B-CRB-14S
Fig. 35 — 62MD,ME330-640 Coupled with Carrier 48/50TJ,TM016-028 and 48/50HJ015,017
Vertical Discharge Rooftop Unit
34
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Rooftop Unit
Rooftop 48/50PG Unit
Accessory Transition
(Includes front panel)
62M ERV Unit
Supply
Return
Accessory Transition
ERV Wheel
ERV Curb
62M330-640 ERV Unit
LEGEND
Energy Recovery Ventilator
ERV
—
NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed economizer
cannot be used.
TOP VIEW
ROOF CURB LOCATION DETAIL
"
A
38 3/4
ERV Curb
60 11/32"
CurbDetail
A
A
B
ERV
Unit
Curb
Rooftop
Unit
Curb
55 13/32"
Return
38 3/4"
Supply
Rooftop Unit Curb
SideViewA-A
C
DIMENSIONS (in.)
B
ROOFTOP UNIT
MODEL
ROOFTOP SIZE
62M TRANSITION
ERV CURB
A
923/4
C
10
48/50PG
08-14
62M-CTR-PG712-D
62M-C-CRB-14M
5315
/
16
Fig. 36 — 62MD,ME330-640 Coupled with Carrier 48/50PG08-14 Vertical Discharge Rooftop Unit
35
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Rooftop Unit
Rooftop Unit
Accessory Transition
(Includes front panel)
62M ERV Unit
Accessory Transition
ERV Wheel
ERV Curb
62M330-640 ERV Unit
LEGEND
ERV
—
Energy Recovery Ventilator
NOTE: When using a 62M ERV unit coupled with a Carrier
rooftop unit, the rooftop factory or field-installed economizer
cannot be used.
TOP VIEW
ROOF CURB LOCATION DETAIL
38 3/4"
A
ERV Curb
60 11/32"
CurbDetail
ERV
Unit
Curb
B
A
A
Rooftop
Unit
Curb
38 3/4"
55 13/32"
C
SideViewA-A
Rooftop Unit Curb
DIMENSIONS (in.)
B
ROOFTOP UNIT
MODEL
ROOFTOP SIZE
62M TRANSITION
ERV CURB
A
923/4
C
10
48/50PG
08-14
62M-CTR-PG712-H
62M-C-CRB-14M
5315
/
16
Fig. 37 — 62MD,ME330-640 Coupled with Carrier 48/50PG08-14 Horizontal Discharge Rooftop Unit
36
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Rooftop Unit
Outside Air Hood (See
Note 2)
62M ERV Unit
Horizontal Return Duct
(Field Supplied)
Accessory
Transition
Rooftop Unit Curb
Rooftop Unit
Accessory
Transition
ERV Curb
62M330-640 ERV Unit
LEGEND
ERV
O/A
—
—
Energy Recovery Ventilator
Outdoor Air
NOTES:
1. The ERV unit can be used with a factory-
installed economizer, if desired.
O/A Hood
2. Transition includes a new outside air hood,
which allows air intake through the front of
the hood rather than the bottom. The new
hood will use the filters from the original
rooftop unit hood.
Relief Hood
Top View
ROOF CURB LOCATION DETAIL
Rooftop Unit Curb
44 3/4"
A
60 11/32"
CurbDetail
ERV
Unit
Curb
Rooftop
Unit
Curb
44 3/4"
A
A
B
55 13/32"
SideViewA-A
ERV Curb
Top View
DIMENSIONS (in.)
ROOFTOP MODEL
ROOFTOP SIZE
62M TRANSITION
ERV CURB
A
B
48/50PG
48/50HJ
20-28
62M-CTR-HG1525-H
62M-CTR-HG1525-H
62M-C-CRB-14M
62M-B-CRB-14M
114.4
114.4
78.6
78.6
020-028
Fig. 38 — 62MD,ME330-640 Coupled with Carrier 48/50PG20-28
and 48/50HJ020-028 Horizontal Discharge Rooftop Unit
37
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Rooftop Unit
Outside Air Hood (See
Note 2)
62M ERV Unit
Rooftop Unit Curb
Accessory
Transition
Rooftop Unit
ERV Curb
Accessory
Transition
62M330-640 ERV Unit
LEGEND
ERV
O/A
—
—
Energy Recovery Ventilator
Outdoor Air
NOTES:
1. The ERV unit can be used with a factory-
installed economizer, if desired.
O/A Hood
2. Transition includes a new outside air hood,
which allows air intake through the front of
the hood rather than the bottom. The new
hood will use the filters from the original
rooftop unit hood.
Top View
Relief Hood
ROOF CURB LOCATION DETAIL
Rooftop Unit Curb
44 3/4"
A
60 11/32"
CurbDetail
ERV
Unit
Curb
Rooftop
Unit
Curb
A
A
B
44 3/4"
55 13/32"
SideViewA-A
ERV Curb
Top View
DIMENSIONS (in.)
ROOFTOP MODEL
ROOFTOP SIZE
62M TRANSITION
ERV CURB
A
B
48/50PG
48/50HJ
20-28
62M-CTR-HG1525-D
62M-CTR-HG1525-D
62M-C-CRB-14M
62M-B-CRB-14M
114.4
114.4
78.6
78.6
020-028
Fig. 39 — 62MD,ME330-640 Coupled with Carrier 48/50PG20-28
and 48/50HJ020-028 Vertical Discharge Rooftop Unit
38
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TOP VIEW
Accessory
Transition
62M ERV Unit
O/Ahood
Exhaust hood
Rooftop Unit
ROOF CURB LAYOUT
60.34"
0"
55.4"
LEGEND
ERV
O/A
—
—
Energy Recovery Ventilator
Outdoor Air
NOTES:
1. The ERV unit can be used with a factory-
installed economizer, if desired.
2. ERV cannot be coupled to a horizontal return
rooftop unit.
58 3/4"
ERV Curb
Rooftop Unit Curb
77 3/4"
SIDE VIEW
Outside air
hood
Rooftop Unit
62M Unit
Economizer
See Note 1
Accessory
Transition
ERV Curb
Standard
Rooftop Unit Curb
ROOFTOP UNIT MODEL
48/50A
ROOFTOP SIZE
020-060
TRANSITION P/N
62M-CTR-AJ2060-D
ERV CURB P/N
62M-C-CRB-14M
Fig. 40 — 62MD,ME330-640 Coupled with Carrier 48/50A020-060 Vertical Discharge Rooftop Unit
39
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Rooftop Unit
62M ERV Unit
Rooftop
Unit Curb
Accessory
Transition
Top View
Rooftop Unit
Accessory
Transition
ERV Curb
62M750,950 ERV Unit
O/AHood
LEGEND
ERV
O/A
—
—
Energy Recovery Ventilator
Outdoor Air
NOTES:
1. The standard factory economizer cannot be
used when coupled with 62M750,950 units.
Contact factory for transition with economizer.
2. 62M750,950 units cannot be used with
48/50TJ and TM016-028 horizontal discharge
rooftop units.
Exhaust Hood
ROOF CURB LOCATION DETAIL
Rooftop Unit Curb
ERV Curb
ERV
Unit
Curb
Rooftop
Unit
Curb
31 9/16"
74 1/4"
A
A
86.25"
0"
Side View A-A
95.7"
67.1"*
319/16"
Top View
*Length is 891/16″ for
48/50TM028 units.
ROOFTOP UNIT MODEL
ROOFTOP SIZE
TRANSITION P/N
62M-DTR-HJ1525-D
62M-DTR-HJ1525-D
ERV CURB P/N
62M-D-CRB-14M
62M-D-CRB-14M
ROOFTOP ECONOMIZER
62MA-900---007
48/50TJ,TM
48/50HJ
016-028
015,017
62MA-900---007
Fig. 41 — 62MD,ME750,950 Coupled with Carrier 48/50TJ,TM016-028
and 48/50HJ015,017 Vertical Discharge Rooftop Unit
40
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Rooftop Unit
62M ERV Unit
Accessory
Transition
Rooftop Unit
Accessory
Transition
62M750,950 ERV
ERV Curb
LEGEND
ERV
O/A
—
—
Energy Recovery Ventilator
Outdoor Air
O/A Hood
NOTE: The ERV unit can be used with a factory-
installed economizer, if desired.
Top View
Relief Hood
ROOF CURB LOCATION DETAIL
ERV Curb
CurbDetail
A
A
ERV
Unit
Curb
Rooftop
Unit
Curb
B
86 1/4"
44 3/4"
SideViewA-A
A
44 3/4”
95 3/4"
Top View
DIMENSIONS (in.)
ROOFTOP MODEL
ROOFTOP SIZE
62M TRANSITION
ERV CURB
A
B
48/50PG
48/50HJ
20-28
62M-DTR-HG1525-H
62M-DTR-HG1525-H
62M-D-CRB-14M
62M-D-CRB-14M
114.4
114.4
78.6
78.6
020-028
Fig. 42 — 62MD,ME750,950 Coupled with Carrier 48/50PG20-28
and 48/50HJ020-028 Vertical Discharge Rooftop Unit
41
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Rooftop Unit
62M ERV Unit
Rooftop Unit Curb
Accessory
Transition
Rooftop Unit
Accessory
Transition
62M750,950 ERV
ERV Curb
LEGEND
ERV
O/A
—
—
Energy Recovery Ventilator
Outdoor Air
O/A Hood
NOTE: The ERV unit can be used with a
factory-installed economizer, if desired.
Top View
Relief Hood
ROOF CURB LOCATION DETAIL
Rooftop Unit Curb
ERV Curb
CurbDetail
ERV
Unit
Curb
Rooftop
Unit
Curb
A
A
B
86 1/4"
44 3/4"
A
95 3/4"
44 3/4”
SideViewA-A
Top View
DIMENSIONS (in.)
ROOFTOP MODEL
ROOFTOP SIZE
62M TRANSITION
ERV CURB
A
B
48/50PG
48/50HJ
20-28
62M-DTR-HG1525-D
62M-DTR-HG1525-D
62M-D-CRB-14M
62M-D-CRB-14M
114.4
114.4
78.6
78.6
020-028
Fig. 43 — 62MD,ME750,950 Coupled with Carrier 48/50PG20-28
and 48/50HJ020-028 Vertical Discharge Rooftop Unit
42
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Rooftop Unit
62M ERV Unit
Accessory
Transition
Unit curb
ERV Curb
62M750,950 ERV Unit
O/AHood
Accessory
Transition
Rooftop Unit
LEGEND
Energy Recovery Ventilator
Outdoor Air
RETURNAIR
SUPPLYAIR
ERV
O/A
—
—
NOTES:
1. The standard factory economizer can be used in
conjunction with 62M750,950 units.
2. 62M750,950 units cannot be used with horizontal
discharge rooftop units.
Exhaust Hood
ROOF CURB LOCATION DETAIL
Rooftop Unit Curb
ERV Curb
0"
CURB DETAIL
ERV
Unit
Curb
Rooftop
Unit
Curb
86.25"
A
A
579/16"
Side View A-A
57 9/16"
(Seecurb
detail)
95.7"
Top View
77 3/4"
ROOFTOP UNIT MODEL
48/50A
ROOFTOP SIZE
TRANSITION P/N
62M-DTR-AJ2060-D
ERV CURB P/N
62M-D-CRB-14M
020-060
Fig. 44 — 62MD,ME750,950 Coupled with Carrier 48/50A020-060 Rooftop Unit
43
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Exhaust hood
(outdoor units only)
2 in. pre-filters for
exhaust
Exhaust
Blower
Outside air hood
(outdoor units only)
Top View
Horizontal Discharge -
Stand-Alone Unit
Optional
Pre-heater
Supply air
blower
2 in. pre-filters for
outside air
ERV wheel
2 in. pre-filters
exhaust
ERV Wheel
Exhaust hood
(outdoor units only)
Return/exhaust
opening in base
Exhaust
blower
Top View
Down Discharge -
Stand-Alone Unit
Optional
Pre-heater
Outside air blower,
mounted over supply
opening in base
Optional
Pre-heater
Outside air intake hood
(outside units only)
2 in. pre-filters
outside air
2 in. pre-filters
outside air
ERV wheel
Outside air
rainhood
Hinged and latched
access door (both sides)
Supply air
blower
Side View
Down Discharge -
Stand-Alone Unit
Supply duct for
outside air (field
provided)
Optional ERV
roof curb
Fig. 45 — 62M Airflow in Stand-Alone Applications
44
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Step 3 — Rigging and Handling — To transfer the
unit from the shipping platform to the storage or installation
site, refer to the rigging label on the unit and these instructions.
Locate the ERV Unit — Prior to locating the indoor ERV unit
consider the intake and exhaust duct accessibility to outside
walls or roof vents. When locating the ERV unit consider
required service clearances.
Refer to Table 1 for ERV unit weights. Check lifting devices
for capacity constraints.
Hook rigging shackles through the holes or lifting eyes in
the ERV unit.
See Table 1 for unit weights to determine if building struc-
NOTE: Some 62M units have lifting eyes, some 62M units
have holes in the ERV base rail. See Fig. 46.
Connect lifting straps and spreader bars. See Fig. 46.
Spreader bars must be positioned to prevent cables from
rubbing against the ERV unit.
Carefully lift the ERV unit and set on ERV roof curb. Do
not drop the ERV unit onto the roof curb, as damage may
occur. Avoid twisting or uneven lifting of the unit. Never lift
the unit by the hoods or any means other than the provided
lifting holes or eyes.
MOUNTING THE ERV UNIT INDOORS — The ERV unit
can be mounted indoors. Follow all local and other applicable
building codes.
45
Table 1 — Physical Data
UNIT 62M
NOMINAL CAPACITY (cfm)
CAPACITY RANGE (cfm)
040
400
075
750
120
1200
170
1700
225
2250
285
2850
100-550
500-1000
1000-1400
1400-2000
2000-2500
2500-3200
MAXIMUM SHIPPING WEIGHT (lb)
Single-Wall Models
Double-Wall Models
255
367
440
635
462
657
850
1135
900
1185
1000
1285
MAXIMUM OPERATING WEIGHT (lb)
Single-Wall Models
Double-Wall Models
235
347
400
595
422
617
790
1075
840
1125
940
1225
62MB,MC INDOOR UNIT DIMENSIONS (in.)
Length*
Width
29.75
29.88
29.75
43.25
39.13
37.88
43.25
39.13
37.88
62.63
58.38
48.88
62.63
58.38
48.88
62.63
58.38
48.88
Height
62MD,ME OUTDOOR UNIT DIMENSIONS (in.)†
Length*
Width
48.43
31.24
29.72
60.75
50.13
37.88
60.75
55.13
37.88
87.13
69.38
48.88
87.13
69.38
48.88
87.13
69.38
48.88
Height
ROTARY ENERGY EXCHANGER
Type
Size (Diam. x Depth) (in.)
Nominal Drive Motor Hp
Enthalpy Lightweight Polymer with Silica Gel Desiccant Coating
22.5 x 2
N/A
29.0 x 2
29.0 x 3
40.0 x 1.5
40.0 x 1.5
40.0 x 3
1
/
1
/
1
/
N/A
N/A
6
6
6
SUPPLY/EXHAUST AIR FAN
Qty…Type
2….Forward Curved Centrifugal
Adjustable Belt Drive
Neoprene Pads
Drive Type
Direct
Fan Isolation
Wheel Dimensions (Diam. x Width)
Nominal Motor Hp
5.5 x 5.5
9 x 7
2
9 x 7
1
12 x 12
1
12 x 12
2
12 x 12
2
1
/
1
/
4
FILTERS (optional)
Type
2-in. Pleated — 30% Efficiency
Exhaust Air...Qty...Size (L x W x D) (in.)
Outside Air...Qty...Size (L x W x D) (in.)
1….12 x 20 x 2
1….12 x 20 x 2
1….18 x 25 x 2
1….18 x 25 x 2
1….18 x 25 x 2
1….18 x 25 x 2
2….20 x 25 x 2
2….20 x 25 x 2
2….20 x 25 x 2
2….20 x 25 x 2
2….20 x 25 x 2
2….20 x 25 x 2
UNIT 62M
NOMINAL CAPACITY (cfm)
CAPACITY RANGE (cfm)
330
3300
430
4300
550
5500
640
6400
750
7500
950
9500
3000-3600
3600-5000
5000-6000
6000-6800
6500-8500
8500-10,500
MAXIMUM SHIPPING WEIGHT (lb)
Single-Wall Models
Double-Wall Models
1300
1710
1350
1760
1440
1850
1590
2000
2650
3270
2750
3370
MAXIMUM OPERATING WEIGHT (lb)
Single-Wall Models
Double-Wall Models
1220
1630
1270
1680
1360
1770
1510
1920
2550
3170
2650
3270
62MB,MC INDOOR UNIT DIMENSIONS (in.)
Length
Width
73.13
67.89
65.21
73.13
67.89
65.21
73.13
67.89
65.21
73.13
67.89
65.21
108.3
97.87
77.4
108.3
97.87
77.4
Height
62MD,ME OUTDOOR UNIT DIMENSIONS (in.)†
Length
Width
100.88
87.89
65.21
100.88
87.89
65.21
100.88
87.89
65.21
100.88
87.89
65.21
143.45
121.87
77.4
143.45
121.87
77.4
Height
ROTARY ENERGY EXCHANGER
Type
Size (Diam. x Depth) (in.)
Nominal Drive Motor Hp
Enthalpy Lightweight Polymer with Silica Gel Desiccant Coating
56.2 x 1.5
56.2 x 1.5
56.2 x 3
56.2 x 3
68.0 x 3
68.0 x 3
1
/
1
/
1
/
1
/
1/4**
1/4**
2
2
2
2
SUPPLY/EXHAUST AIR FAN
Qty…Type
2...Forward Curved Centrifugal
Adjustable Belt Drive
Neoprene Pads
Drive Type
Fan Isolation
Wheel Dimensions (Diam. x Width)
Nominal Motor Hp
15 x 15
2
15 x 15
3
15 x 15
5
15 x 15
18 x 18
18 x 18
10
71/2
71/2
FILTERS (optional)
Type
2-in. Pleated — 30% Efficiency
Exhaust Air...Qty...Size (L x W x D) (in.)
Outside Air...Qty...Size (L x W x D) (in.)
6….16 x 20 x 2
6….16 x 20 x 2
6….16 x 20 x 2
6….16 x 20 x 2
6….16 x 20 x 2
6….16 x 20 x 2
6….16 x 20 x 2
6….16 x 20 x 2
6….20 x 24 x 2
6….20 x 24 x 2
6….20 x 24 x 2
6….20 x 24 x 2
LEGEND
N/A — Not Applicable
*Add 10 in. to 62M040 units equipped with a preheater.
†Dimensions include outdoor air hoods.
**575-v motors are 1/3 hp.
46
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Step 4 — Installing ERV Transitions — When cou-
pling ERV units with Carrier rooftop units an ERV transition is
required to link the ERV unit and the Carrier rooftop unit
together.
IMPORTANT: Only trained, qualified installers and
service technicians should install, wire, start-up and
service equipment.
ERV UNIT COUPLED WITH A 3 to 121/2 TON HVAC
UNIT — Complete the following steps to install a transition to
a 3 to 121/2 ton rooftop unit.
1. Remove the HVAC unit filter door and set aside for later
use.
POWER SUPPLY — The electrical characteristics of the
available power supply must agree with the unit nameplate
rating. Supply voltage must be within the limits shown. See
Tables 2 and 3 for electrical and configuration data.
ELECTRICAL CONNECTIONS — The ERV unit must
have its own electrical disconnect box. If the disconnect option
has not been ordered from the factory, it must be field supplied
and installed per local codes. See Tables 2 and 3.
If the ERV unit has an electric pre-heater factory installed, it
will be wired through the ERV unit disconnect.
NOTE: Most ERV units have electrical interlock safety
switches on the access doors, which will not allow the ERV
unit to operate if either of the access doors are opened.
Low Voltage Wiring — Wire low voltage per diagrams. For
coupled applications, there will be a brown and black wire in
the exhaust chamber, which must be tied into the HVAC unit’s
indoor fan so that when the indoor fan is activated, the ERV
unit will be activated.
48/50TJ, HJ 3 to 121/2 Ton Rooftop Units with Economizers
— The brown and black wires can be plugged into the econo-
mizer jumper plug on the HVAC unit’s economizer harness.
Insert the brown wire from the ERV unit into terminal 4 in the
jumper plug and insert the black wire from the ERV unit into
terminal 3 in the jumper plug. See Fig. 47.
2. Remove the panel shipped on the HVAC unit covering
the return air chamber. This panel can be discarded.
3. The 62M ERV transition for 3 to 121/2 ton rooftop units
includes a replacement panel to cover the return opening.
Install the replacement panel, with hood scoop attached,
onto the HVAC unit, over the return air chamber. Screw
in place. The return/exhaust scoop will cover part of the
return air opening in the HVAC unit.
NOTE: The standard transition does not seal tight around the
return air opening on the HVAC unit. This allows for some air
to flow back to the HVAC unit and some to be drawn back
through the ERV unit.
4. Slide the transition between the ERV unit and the HVAC
unit. Refer to Fig. 17-44 to orient the transition. Line up
the transition so that it covers the openings in the HVAC
unit and the ERV unit. The divider in the transition must
separate the supply and return openings in the ERV unit.
Screw the mating flanges of the transition to the ERV unit
through pre-punched holes. Caulk the seams watertight.
Screw the mating flanges on the other side of the transi-
tion to the new return air cover panel on the HVAC unit.
Caulk seams watertight.
If the 3 to 121/2 ton rooftop unit has an economizer in-
stalled, the economizer will have an end switch attached to the
economizer actuator. The end switch must be wired into the
ERV unit as shown in Fig. 48.
5. On most models the filter access door shipped with the
HVAC unit will be reinstalled above the transition.
For ERV units coupled with units with factory-installed
economizers, (48/50TM, HJ 15 to 25 ton units 48/50HG, PG 15
to 25 ton units) the ERV transitions to these rooftop units in-
clude an economizer end switch. This switch mounts to the hub
of the economizer damper gear as shown in Fig. 49. Set the end
switch so that the ERV unit’s outside air blower is deactivated
during economizer mode.
For stand-alone units, the ERV unit is jumpered from termi-
nals 6 and 8 and 7 and 9, providing for continuous operation.
The ERV unit should be connected to an on-off device such as
a CO2 sensor.
6. The transition includes a balancing damper to allow for
the desired separation of the return/exhaust air between
the ERV and HVAC units. This damper has a manual
adjustment. During balancing, this damper will be
adjusted to achieve desired exhaust cfm. The balancing
damper can be accessed through a separate door in the
transition or through the HVAC unit’s filter access door.
See Fig. 17-44.
Step 5 — Make Electrical Connections
High Voltage Wiring (Fig. 50-53) — Connect high voltage
wiring to the disconnect per Fig. 50, 52 and 53. Check blower
rotation direction and adjust if necessary.
Prior to performing service or maintenance operations on
the ERV unit, turn off and disconnect all power switches to
the unit. Be aware that there may be more than one discon-
nect switch. Electrical shock could cause serious personal
injury or death.
47
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Table 2 — Electrical Data Without VAV Option
DISCONNECT
(Optional)
EXHAUST AND SUPPLY MOTOR
POWER SUPPLY
HEATER
SIZE
PRE-HEATER
(Optional)
FLA
UNIT SIZE
62M
VOLTAGE
(V-Ph-Hz)
ERV WHEEL
FLA
Fuse Size*
(kW)
NEC - FLA
Hp
FLA MCA MOCP
Amps
Amps
12
30
5
—
2
—
2
—
2
—
2
—
2
—
2
5
—
2
5
—
2
5
—
2
5
—
2
5
—
2
5
—
2
5
—
5
8
—
2
5
—
2
9.27
26.64 31.64 31.64
4.44 4.35 5.66
13.76 16.37 16.37
4.11 4.35 5.66
9.66 11.30 11.30
9.90 12.87
—
17.39
—
8.7
—
5.03
—
2.51
—
2.01
—
17.39
43.48
—
8.7
21.74
—
5.03
12.57
—
2.51
6.28
—
2.01
5.03
—
17.39
43.48
—
8.70
21.74
—
5.03
12.57
—
2.51
6.28
—
2.01
5.03
—
21.74
34.78
43.48
—
12.57
20.11
25.13
—
6.28
10.05
12.57
—
5.03
8.04
10.05
30
40
115-1-60
230-1-60
0.7
3.96
15
5
040
208/230-3-60
460-3-60
.6
10
3
0.3
1.74†
30
2.34
4.85
1.87
3.75
2.72
5.86
2.17
4.18
4.89
7.40
3.91
5
2
4
575-3-60
6.90
20.69 24.5
31.85
40
60
100
30
45
70
15
20
35
6
115-1-60
230-1-60
0.7
0.3
0.7
0.3
9.8
4.9
2.2
1.1
0.9
16
38.08 46.24 49.24
64.17 78.85 78.85
10.46 12.25 15.93
19.16 23.12 24.62
30
60
32.2
5.03
39.42 39.42
5.50 7.15
075
208/230-3-60
460-3-60
0.5
10.05 11.78 12.18
17.59 21.21 21.21
12
20
4
2.53
5.04
2.75
5.89
3.58
6.09
30
6
8.81 10.60 10.60
10
3
5
2.10
4.11
7.13
2.25
4.76
8.53
2.93
4.94
8.53
575-3-60
8
33.09 40.00 52.00
50.48 61.74 69.39
76.57 94.35 95.48
16.66 20.00 26.00
25.36 30.87 34.70
38.40 47.17 47.74
9.03 10.50 13.65
14.05 16.78 18.68
21.59 26.21 26.22
60
80
200
30
40
60
30
30
40
50
60
90
25
30
45
12
18
25
6
115-1-60
230-1-60
8
120
208/230-3-60
460-3-60
4.2
2.1
1.7
1
4.53
7.04
5.25
8.39
6.83
9.34
8
10.81 13.10 13.11
12
5
30
3.70
5.71
4.25
6.76
5.53
7.54
575-3-60
6
5
—
5
8.73 10.53 10.55
16.93 20.00 26.00
38.67 47.17 47.74
51.71 63.48 63.48
60.41 74.35 74.35
9.33 10.50 13.65
21.90 26.21 26.22
29.44 35.63 35.63
34.46 41.91 41.91
10
25
45
60
70
12
25
35
40
6
12
18
20
5
10
12
15
30
60
80
100
30
40
60
60
30
30
30
30
30
30
30
30
230-1-60
208/230-3-60
460-3-60
8
4.2
2.1
1.7
8
10
—
5
8
10
—
5
170
0.6
1
4.69
5.25
6.83
10.97 13.10 13.11
14.74 17.82 17.82
17.26 20.96 20.96
8
10
—
5
8
10
3.88
4.25
5.53
8.90 10.53 10.55
11.92 14.30 14.30
13.93 16.82 16.82
575-3-60
LEGEND
ERV
—
—
—
—
—
—
—
Energy Recovery Ventilator
Full Load Amps
FLA
Hp
Horsepower
MCA
MOCP
NEC
N/A
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electric Code
Not Applicable
*Fused disconnect only.
†Exhaust and supply fan motors are 230-1-60.
48
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Table 2 — Electrical Data Without VAV Option (cont)
DISCONNECT
(Optional)
EXHAUST AND SUPPLY MOTOR
POWER SUPPLY
HEATER
SIZE
PRE-HEATER
(Optional)
FLA
Amps
UNIT SIZE
62M
VOLTAGE
(V-Ph-Hz)
ERV WHEEL
FLA
Fuse Size*
(kW)
NEC - FLA
Hp
FLA MCA MOCP
Amps
20
30
40
45
—
5
8
10
—
5
14.53 17.00 22.10
27.10 32.71 34.67
34.64 42.13 42.21
39.66 48.41 48.41
7.29 8.50 11.05
13.57 16.35 17.33
—
30
40
60
60
30
30
12.57
20.11
25.13
—
208/230-3-60
6.8
10
15
6.28
225
460-3-60
0.6
3.4
2
49
Table 2 — Electrical Data Without VAV Option (cont)
DISCONNECT
(Optional)
EXHAUST AND SUPPLY MOTOR
POWER SUPPLY
HEATER
SIZE
(kW)
PRE-HEATER
(Optional)
FLA
Amps
UNIT SIZE
62M
VOLTAGE
(V-Ph-Hz)
ERV WHEEL
FLA
Fuse Size†
Amps
NEC - FLA
Hp
FLA
MCA MOCP
—
8
10
15
—
8
10
15
—
8
45.53 56.50 72.70
65.64 81.63 92.81
70.66 87.91 97.83
83.23 103.62 110.40
22.82 29.00 36.95
32.87 41.57 47.00
35.38 44.71 49.52
41.66 52.56 55.80
18.65 24.00 30.45
26.69 34.05 38.49
28.70 36.57 40.50
33.73 42.85 45.53
46.83 58.13 74.00
71.96 89.54 99.13
84.53 105.25 111.70
97.09 120.95 124.26
23.36 29.00 36.95
35.93 44.71 49.52
42.21 52.56 55.80
48.49 60.41 62.08
19.53 24.25 30.65
29.58 36.82 40.70
34.61 43.10 45.73
39.64 49.38 50.76
64.46 80.13 102.60
92.25 114.86 130.39
106.15 132.23 144.29
120.04 149.60 158.18
29.36 36.50 46.70
41.93 52.21 59.27
48.21 60.06 65.55
54.49 67.91 71.83
23.53 29.25 37.15
33.58 41.82 47.20
38.61 48.10 52.23
43.64 54.38 57.26
—
100
70
20.11
25.13
37.70
—
10.05
12.57
18.85
—
8.04
10.05
15.08
—
25.13
37.70
50.26
—
12.57
18.85
25.13
—
10.05
15.08
20.11
—
27.79
41.69
55.58
—
12.57
18.85
25.13
—
208/230-3-60
460-3-60
22
90
200
110
35
60
640
750
950
1.2
11
9
45
60
80
40
50
30
35
40
45
70
90
575-3-60
10
15
—
10
15
20
—
10
15
20
—
10
15
20
—
10
15
20
—
10
15
20
—
10
15
20
60
7.5
100
200
208/230-3-60
460-3-60
2.5
1.2
1.4
2.5
1.2
1.4
22
11
9
110
35
45
50
60
30
40
45
50
100
60
80
80
40
575-3-60
60
208/230-3-60
460-3-60
30.8
14
11
200
125
N/A
45
50
60
70
35
45
60
80
80
10
100
60
80
10.05
15.08
20.11
575-3-60
LEGEND
50
ERV
FLA
Hp
MCA
MOCP
NEC
N/A
—
—
—
—
—
—
—
Energy Recovery Ventilator
Full Load Amps
Horsepower
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electric Code
Not Applicable
*Fused disconnect only.
†Exhaust and supply fan motors are 230-1-60.
50
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Table 3 — Electrical Data With VAV Option
VFD
EXHAUST AND SUPPLY
FAN MOTOR
DISCONNECT
(Optional)
POWER SUPPLY
VFD
VOLTAGE
V-Ph-Hz
ERV
WHEEL
FLA
CURRENT
INPUT
HEATER
SIZE
(kW)
PRE-HEATER
(Optional)
FLA
Amps
UNIT SIZE
62M*
Fuse Size†
Amps
VALUE
AMP
NEC - FLA
Hp
FLA
MCA MOCP
—
2
5
—
2
5
—
2
5
—
2
5
—
2
5
—
2
5
—
2
5
—
5
8
—
2
5
—
2
5
—
5
8
10
—
5
19.75 23.00 29.90
37.14 44.74 47.29
63.23 77.35 77.35
11.05 13.02 16.93
19.74 23.89 25.62
32.79 40.19 40.19
—
17.39
43.48
—
8.70
21.74
—
5.03
12.57
—
2.51
6.28
—
2.01
5.03
—
17.39
43.48
—
8.70
21.74
—
5.03
12.57
—
2.51
6.28
—
2.01
5.03
—
21.74
34.98
43.48
—
12.57
20.11
25.13
—
6.28
10.05
12.57
—
5.03
8.04
10.05
—
12.57
20.11
25.13
—
6.28
10.05
12.57
—
40
60
100
25
45
70
15
25
40
8
12
20
5
115-1-60
230-1-60**
208/230-3-60
460-3-60
0.7
0.3
0.7
0.3
9.2
5.2
2.8
1.5
2.1
16.6
9.6
5.3
2.6
2.1
30
60
2.2
6.26
7.03
9.14
075
0.5
11.28 13.31 14.17
18.82 22.74 22.74
3.24
5.76
3.65
6.79
4.74
7.25
1.1
0.9
30
6
10
6
9.53 11.50 11.50
4.41
6.42
5.13
7.64
6.67
8.68
575-3-60
8
9.43 11.41 11.69
34.55 41.50 53.95
51.94 63.24 71.34
78.03 95.85 97.43
19.80 23.96 31.15
28.49 34.83 39.84
41.54 51.13 52.88
11.26 13.28 17.27
16.28 19.56 22.29
23.82 28.99 29.83
10
50
70
90
30
35
50
15
20
25
8
80
100
200
40
60
80
30
30
40
115-1-60
230-1-60**
208/230-3-60
460-3-60
4.2
120
1
5.53
8.05
6.51
9.65 10.98
8.46
2.1
1.7
10
12
6
11.82 14.36 14.75
30
4.41
6.42
5.13
7.64
6.67
8.68
575-3-60
8
9.43 11.41 11.69
20.10 23.96 31.15
41.84 51.13 52.88
54.88 67.44 67.44
63.57 78.31 78.31
11.56 13.28 17.27
24.12 28.99 29.83
31.66 38.41 38.41
36.69 44.70 44.70
10
30
50
60
70
15
25
35
40
8
40
80
80
100
30
40
230-1-60**
208/230-3-60
460-3-60
9.6
5.3
2.6
2.1
8.2
4.2
3.6
4.2
8
60
60
10
—
5
170
0.6
1
5.70
6.51
8.46
11.98 14.36 14.75
15.75 19.08 19.08
18.26 22.22 22.22
12
17.5
20
6
2.1
1.7
6.8
3.4
2.7
8
10
—
5
30
4.58
5.13
6.67
9.61 11.41 11.69
12.62 15.18 15.18
14.63 17.69 17.69
17.39 20.57 26.74
29.95 36.28 39.31
37.49 45.70 46.85
42.52 51.99 51.99
8.82 10.42 13.54
15.11 18.27 19.82
18.88 22.98 23.59
21.39 26.12 26.12
10
15
17.5
25
35
45
50
12
17.5
20
25
10
15
17.5
20
575-3-60
8
10
—
5
40
60
30
40
208/230-3-60
460-3-60
8
10
—
5
225
0.6
2
8
10
—
5
8
10
7.66
8.97 11.66
12.68 15.26 16.69
15.70 19.03 19.71
17.71 21.54 21.72
5.03
8.04
10.05
575-3-60
30
51
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Table 3 — Electrical Data With VAV Option (cont)
VFD
CURRENT
INPUT
VALUE
AMP
EXHAUST AND SUPPLY
FAN MOTOR
DISCONNECT
(Optional)
POWER SUPPLY
VFD
VOLTAGE
V-Ph-Hz
ERV
WHEEL
FLA
HEATER
SIZE
(kW)
PRE-HEATER
(Optional)
FLA
Amps
UNIT SIZE
62M*
Fuse Size†
Amps
NEC - FLA
Hp
FLA
MCA MOCP
—
5
8
17.39 20.57 26.74
29.95 36.28 39.31
37.49 45.70 46.85
42.52 51.99 51.99
—
40
60
25
35
45
50
12.57
20.11
25.13
208/230-3-60
8.2
6.8
10
285
0.6
2
LEGEND
*The VAV option is not available on 62M040 units.
†Fused disconnect only.
**Exhaust and supply fan motors are 230-3-60.
52
Table 3 — Electrical Data With VAV Option (cont)
VFD
CURRENT
INPUT
VALUE
AMP
EXHAUST AND SUPPLY
FAN MOTOR
DISCONNECT
(Optional)
POWER SUPPLY
PRE-
HEATER
(Optional)
FLA
VFD
VOLTAGE
V-Ph-Hz
ERV
WHEEL
FLA
HEATER
SIZE
(kW)
UNIT SIZE
62M*
Fuse Size†
NEC - FLA
Hp
FLA
MCA MOCP
Amps
Amps
—
8
10
15
—
8
10
15
—
8
53.61 65.10 84.64
73.72 90.24 104.74
78.75 96.52 109.77
91.31 112.23 122.33
26.65 32.29 41.98
36.70 44.86 52.03
39.21 48.00 54.55
45.50 55.85 60.83
23.62 28.71 37.33
31.66 38.76 45.37
33.67 41.28 47.38
38.70 47.56 52.40
54.91 65.10 84.64
80.05 96.52 109.77
92.61 112.23 122.33
105.18 127.93 134.90
27.20 32.29 41.98
39.76 48.00 54.55
46.05 55.85 60.83
52.33 63.71 67.11
24.50 28.71 37.33
34.55 41.28 47.38
39.58 47.56 52.40
44.61 53.84 57.43
70.86 85.00 110.50
98.65 119.74 138.29
112.55 137.11 152.19
126.44 154.48 166.08
34.28 41.15 53.49
46.85 56.85 66.06
53.13 64.71 72.34
59.41 72.56 78.62
29.63 35.12 45.66
39.68 47.69 55.71
44.71 53.97 60.74
49.73 60.25 65.76
—
100
200
80
100
100
110
40
50
50
60
35
45
45
50
80
100
110
125
40
50
60
20.11
25.13
37.70
—
10.05
12.57
18.85
—
8.04
10.05
15.08
—
25.13
37.70
50.26
—
12.57
18.85
25.13
—
10.05
15.08
20.11
—
27.79
41.69
55.58
—
12.57
18.85
25.13
—
208/230-3-60
460-3-60
26
12.9
11.5
26
22
60
80
640
750
950
1.2
11
9
60
575-3-60
10
15
—
10
15
20
—
10
15
20
—
10
15
20
—
10
15
20
—
10
15
20
—
10
15
20
80
100
7.5
208/230-3-60
460-3-60
2.5
1.2
1.4
2.5
1.2
1.4
22
11
9
200
60
12.9
11.5
34
80
60
35
45
50
60
80
575-3-60
50
110
125
N/A
N/A
50
60
70
70
45
208/230-3-60
460-3-60
30.8
14
11
200
80
16.5
14
10
100
60
10.05
15.08
20.11
50
60
60
575-3-60
LEGEND
80
ERV
FLA
Hp
—
—
—
—
—
—
—
—
Energy Recovery Ventilator
Full Load Amps
Horsepower
MCA
MOCP
NEC
N/A
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electric Code
Not Applicable
VFD
Variable Frequency Drive
*The VAV option is not available on 62M040 units.
†Fused disconnect only.
**Exhaust and supply fan motors are 230-3-60.
53
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20
19
18
17
16
15
14
Economizer
harness/plug coming
from control box in
HVAC unit.
Actuator
(Motor)
Black
Important: Remove
and re-install through
end switch
Jumper
in plug
leave.
Economizer
End switch
Jumper plug
shipped attached
economizer plug.
Fig. 48 — Economizer End Switch Wiring
Brown
Fig. 47 — Jumper Plug Detail
20
19
Economizer
Switch
Economizer
Gear hub
18
17
16
15
14
Switch
Bracket
Fig. 49 — Economizer Switch Wiring
54
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55
56
57
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START-UP
Use the following information and the Start-Up Checklist
on page CL-1 to check unit PRIOR to start-up.
Unit Preparation — Check that the unit has been in-
stalled in accordance with these installation instructions and all
applicable codes.
Check all fasteners and set screws for tightness. This is
critical for bearings and fan wheels. Also, if dampers are not
motorized, check that they open and close without binding.
Internal Wiring — Check all electrical connections in the
control box. Tighten as required.
Rain Hoods — Some ERV units will require the outside
air and/or exhaust hood to be field installed. Caulk coupled
flanges and screw to ERV unit.
NOTE: Units for indoor applications will not have rain hoods.
The outside air hood will include aluminum water entrain-
59
0.8
0.7
0.6
0.5
0.4
62M040
62M120
62M075
0.3
0.2
200
400
600
800
1000
1200
1400
Airflow (cfm)
*Data based on measurements taken using optional airflow test ports.
Fig. 54 — 62M040-120 ERV Wheel Pressure Drop*
1.2
1.1
62M330,430
1
0.9
0.8
62M285
62M170,225
0.7
0.6
0.5
0.4
1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000
Airflow (cfm)
*Data based on measurements taken using optional airflow test ports.
Fig. 55 — 62M170-430 ERV Wheel Pressure Drop*
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1.2
1.1
1
62M550,640
62M750,950
0.9
0.8
0.7
0.6
0.5
5000
5500
6000
6500
7000
7500
8000
8500
9000
9500
10000 10500 11000
Airflow (cfm)
*Data based on measurements taken using optional airflow test ports.
Fig. 56 — 62M550-950 ERV Wheel Pressure Drop* (cont)
61
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600
500
400
Supply Air High Speed
Supply Air Speed Three
Supply Air Speed Two
Supply Air Low Speed
300
200
100
0
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
External Static Pressure (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 57 — 62M040 Supply Air Fan Performance Curves
600
500
400
300
200
100
0
Exhaust Air High Speed
Exhaust Air Speed Three
Exhaust Air Speed Two
Exhaust Air Low Speed
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
External Static Pressure (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 58 — 62M040 Exhaust Air Fan Performance Curves
62
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1400
1200
1000
800
600
400
200
0
1112 rpm: 2 turns
1058 rpm: 3 turns
1002 rpm: 4 turns
942 rpm: 5 turns
0.1
0.3
0.5
0.7
0.9
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 59 — 62M075 Supply Air Fan Performance Curves
1200
1000
800
600
400
200
0
1136 rpm: 2 turns
1081 rpm: 3 turns
1010 rpm: 4 turns
946 rpm: 5 turns
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 60 — 62M075 Exhaust Air Fan Performance Curves
63
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1575
1375
11 75
975
1448 rpm: 2 turns
1315 rpm: 3 turns
1277 rpm: 4 turns
1194 rpm: 5 turns
775
575
375
0.2
0.4
0.6
0.8
1
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 61 — 62M120 Supply Air Fan Performance Curves
1475
1275
1075
875
1399 rpm: 2 turns
1332 rpm: 3 turns
1244 rpm: 4 turns
1162 rpm: 5 turns
675
475
275
0.2
0.4
0.6
0.8
1.0
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 62 — 62M120 Exhaust Air Fan Performance Curves
64
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2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
1121 rpm: 3 turns
1074 rpm: 4 turns
1017 rpm: 5 turns
937 rpm: 6 turns
0.2
0.4
0.6
0.8
1
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 63 — 62M170 Supply Air Fan Performance Curves
2600
2400
2200
2000
1800
1600
1400
1200
1000
1068 rpm: 3 turns
1045 rpm: 4 turns
1018 rpm: 5 turns
977 rpm: 6 turns
0.2
0.4
0.6
0.8
1
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 64 — 62M170 Exhaust Air Fan Performance Curves
65
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3000
2500
2000
1500
1000
1159 rpm: 3 turns
1114 rpm: 4 turns
1054 rpm: 5 turns
0.2
0.4
0.6
0.8
1
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 65 — 62M225 Supply Air Fan Performance Curves
3000
2500
2000
1500
1000
1077 rpm: 3 turns
1052 rpm: 4 turns
1024 rpm: 5 turns
964 rpm: 6 turns
0.2
0.4
0.6
0.8
1
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 66 — 62M225 Exhaust Air Fan Performance Curves
66
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3500
3000
2500
2000
1500
1000
1186 rpm: 2 turns
1109 rpm: 3 turns
1057 rpm: 4 turns
1010 rpm: 5 turns
0.1
0.3
0.5
0.7
0.9
1.1
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 67 — 62M285 Supply Air Fan Performance Curves
3500
3000
2500
1193 rpm: 2 turns
1147 rpm: 3 turns
1097 rpm: 4 turns
1062 rpm: 5 turns
2000
1500
1000
0.1
0.3
0.5
0.7
0.9
1.1
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 68 — 62M285 Exhaust Air Fan Performance Curves
67
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4500
4000
3500
3000
2500
2000
833 rpm: 2 turns
803 rpm: 3 turns
763 rpm: 4 turns
0.10
0.20
0.30
0.40
0.50
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 69 — 62M330 Supply Air Fan Performance Curves
4000
3800
3600
3400
3200
3000
2800
2600
2400
2200
2000
842 rpm: 2 turns
808 rpm: 3 turns
770 rpm: 4 turns
0.13
0.20
0.30
0.40
0.50
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 70 — 62M330 Exhaust Air Fan Performance Curves
68
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5500
5000
4500
4000
3500
3000
2500
962 rpm: 3 turns
942 rpm: 4 turns
891 rpm: 5 turns
0. 20
0. 40
0. 60
0. 80
1. 00
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 71 — 62M430 Supply Air Fan Performance Curves
5500
5000
4500
4000
3500
3000
2500
871 rpm: 4 turns
891 rpm: 5 turns
0. 20
0. 40
0. 60
0. 80
1. 00
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 72 — 62M430 Exhaust Air Fan Performance Curves
69
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6500
6000
5500
5000
4500
4000
3500
3000
2500
2000
1109 rpm: 2 turns
1068 rpm: 3 turns
1014 rpm: 4 turns
968 rpm: 5 turns
0.2
0.4
0.6
0.8
1.0
1.2
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 73 — 62M550 Supply Air Fan Performance Curves
6500
6000
5500
5000
4500
4000
3500
3000
2500
2000
1109 rpm: 2 turns
1049 rpm: 3 turns
998 rpm: 4 turns
947 rpm: 5 turns
0.3
0.4
0.6
0.8
1.0
1.2
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 74 — 62M550 Exhaust Air Fan Performance Curves
70
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7500
7000
6500
6000
5500
5000
1256 rpm: 2 turns
1174 rpm: 3 turns
1150 rpm: 4 turns
0.25
0.45
0.65
0.85
1.00
1.20
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 75 — 62M640 Supply Air Fan Performance Curves
8000
7500
7000
6500
6000
5500
5000
1202 rpm : 0 turns
1152 rpm: 1 turn
1123 rpm: 2 turns
1096 rpm: 3 turns
0.4
0.5
0.6
0.7
0.9
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 76 — 62M640 Exhaust Air Fan Performance Curves
71
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9500
9000
8500
8000
7500
7000
6500
6000
5500
906 rpm: 0 turns
870 rpm: 1 turns
847 rpm: 2 turns
821 rpm: 3 turns
807 rpm: 4 turns
0.10
0.30
0.50
0.70
0.90
1.10
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 77 — 62M750 Supply Air Fan Performance Curves
9000
8500
8000
7500
7000
6500
6000
5500
923 rpm : 0 turns
898 rpm: 1 turn
862 rpm: 2 turns
844 rpm: 3 turns
813 rpm: 4 turns
0.3
0.5
0.7
0.9
1.1
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 78 — 62M750 Exhaust Air Fan Performance Curves
72
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11500
11000
10500
10000
9500
9000
8500
8000
7500
7000
6500
966 rpm: 3 turns
896 rpm: 4 turns
831 rpm: 5 turns
0.10
0.30
0.50
0.70
0.90
1.10
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 79 — 62M950 Supply Air Fan Performance Curves
11000
10500
10000
9500
9000
8500
8000
7500
7000
1024 rpm: 3 turns
962 rpm: 4 turns
929 rpm: 5 turns
0.3
0.5
0.7
0.9
1.1
External Static (in. wg)
NOTE: Fan data includes pressure drop for 30% efficient 2-in. filters.
Fig. 80 — 62M950 Exhaust Air Fan Performance Curves
73
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Occupied Mode, with CO2 Sensor — When the CO2 sensor
is used, it will measure the space CO2 levels in parts per
million (ppm). The 62M ERV CO2 setting is factory set at
1,000 ppm but can be adjusted from 0 ppm to 2,000 ppm.
When either the scheduling program and/or the CO2 sensor
calls for ERV operation, the ERV will activate the following:
•
•
•
•
ERV wheel
Outdoor air blower motor
EXH blower motor
Two-position damper opens
NOTE: The two-position damper option may slightly delay
activation of the ERV blower motor.
Occupied Mode, with Frost Protection — In the occupied
mode, the frost protection option will eliminate frost build-up
on the ERV wheel using exhaust air. It is activated via a
pressure differential across the ERV wheel. This set point is
field set from 0.2 in. wg to 2.0 in. wg and must be set to 150%
of the normal static pressure across the wheel. The frost protec-
tion feature is automatically locked out above 35 F.
NOTE: If the outdoor-air temperature is below 35 F, a dirty
wheel may incorrectly activate the frost control feature if the
differential pressure across the wheel exceeds the set point.
Fig. 81 — Blower Motor Pulley Adjustment
When the frost protection option is activated the following
will occur:
•
•
•
ERV wheel turns on.
Outdoor air blower motor turns off.
EXH blower motor is on.
Occupied Mode, with the Pre-Heat Option — In the occu-
pied mode, the pre-heat option provides frost protection for the
ERV wheel and slightly warms the outdoor air. This feature is
factory set to activate at –5 F, and can be field adjusted from
–30 F to 100 F. It is recommended that this set point be set at
the frost threshold for the region in which it is used.
If desired, this feature may also be activated via a field
supplied pressure differential switch to determine if frost build
up has occurred on the ERV wheel.
Occupied Mode, with the Economizer Accessory — When
using the economizer option, this allows for up to 100%
outside air to be brought in for free cooling. During free
cooling, the rooftop unit mechanical cooling may or may not
be operating depending on the set points used with the rooftop
unit. When using the economizer accessory, it is recommended
that the minimum position be set to the closed position and the
ERV should be set such that it is locked out when the econo-
mizer opens far enough to bring in the same level of outdoor air
as the ERV.
Fig. 82 — Belt Alignment
If desired, this feature may also be activated via a
field-supplied pressure differential switch to determine if frost
build- up has occurred on the ERV wheel.
Variable Air Volume Option — This option can be
used in conjunction with the CO2 sensor option (ordered
separately). Outside air and exhaust air blower speeds are
independently controlled by variable frequency drives and
modulated based upon space occupancy, which can be
measured by CO2. The more people in the space the greater the
CO2 levels, the more outside air is introduced. This option
eliminates over ventilating the space in less than full condi-
tions. The ERV unit has completely different electrical charac-
teristics when used with a variable air volume option. Refer to
Tables 2 and 3.
During free cooling, the following occurs:
•
•
•
•
•
•
ERV wheel is turned off.
Outdoor air blower is turned off.
EXH blower motor turns on.
Two-position outdoor-air damper is closed (if used).
Two-position EXH damper is opened (if used).
Stop/jog option will periodically rotate the ERV wheel
to clean it during wheel bypass operation. This feature is
factory set to activate every 10 minutes, for 20 seconds
of operation. Both settings can be adjusted from 0 to 10
minutes.
Operating Sequence
Wheel Bypass Option — When using the wheel bypass option
(with the stop/jog option), this allows free cooling through the
wheel limited by the ERV airflow cfm limits. With this option
the unit can be in free cooling or not depending on the tempera-
ture of the outdoor-air compared to the set point. When not in
free cooling, the ERV will not operate. When in free cooling:
OCCUPIED MODE — While in occupied mode, the 62M
ERV will operate per the ERV Timer option (scheduling
program), the CO2 sensor input, a combination of the schedul-
ing option and CO2 input, or the economizer accessory.
Additionally, the low temperature lockout (LTLO) function
locks out the 62M ERV if the outdoor-air temperature entering
the wheel is below the set point. The LTLO is factory set at
–10 F, and can be field adjusted from –30 F to 100 F.
•
•
ERV wheel is turned off.
Outdoor-air blower is turned on.
74
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•
•
•
EXH blower motor is turned on.
To install the segments see the Installing Wheel Segments
(62M075-950) section.
The two-position damper is open (if used).
The stop/jog option will periodically rotate the ERV
wheel to clean it during wheel bypass operation. This
feature is factory set to activate every 10 minutes, for
20 seconds of operation. Both settings can be adjusted
from 0 to 10 minutes.
Removing and Installing Non-Segmented Wheel
for Cleaning (62M040 Units) — Non-segmented ener-
gy transfer wheels are secured to the shaft and bearing support
beam by a Phillips head screw and hub cover. See Fig. 84.
To remove the energy transfer wheel, follow Steps 1-4
below. (See Fig. 84.) Reverse procedure for wheel installation.
1. Remove front seal assembly (pulley side of cassette) if
present.
2. Remove belt from pulley and position temporarily around
wheel rim.
3. Remove the hub cover from the wheel. Note the wheel to
shaft alignment pin under the hub cover. Ensure this pin
engages the notch at the end of the shaft when reinstalling
the wheel.
UNOCCUPIED MODE — While in unoccupied mode, when
below the low temperature lockout set point, the ERV wheel is
off, and only the two-position damper option is opened to
allow free cooling when desired. The dampers are controlled
by either the ERV Timer option (scheduling program) or the
CO2 sensor input. Additionally, the frost protection and preheat
options are also off. The low temperature lockout (LTLO)
function locks out the 62M ERV if the outdoor-air temperature
entering the wheel is below the set point. The LTLO is factory
set at –10 F, and can be field adjusted from –30 F to 100 F.
When above the low temperature lockout set point and
cooling is desired the economizer or wheel bypass option is
also used. Depending on the option used with the 62M ERV,
several sequences of operation could occur.
4. Pull the wheel straight off the shaft. Handle wheel with
care to prevent distorting of the wheel.
Unoccupied Mode, with the Economizer Accessory — When
using the economizer option, this allows for up to 100% out-
side air to be brought in for free cooling. During free cooling,
no mechanical cooling is operating and the following occurs:
•
•
•
•
•
•
ERV wheel is turned off.
Outdoor air blower motor is off.
EXH blower motor is off.
Two-position OA damper option is closed (if used).
Two-position EXH damper is open (if used).
The stop/jog option will periodically rotate the ERV
wheel to clean it during wheel bypass operation.
When using the economizer option and mechanical cooling
is operating, the economizer should be closed or at the mini-
mum position.
Unoccupied Mode, with the Wheel Bypass Option — When
using the wheel bypass option (with the stop/jog option), this
allows free cooling through the wheel limited by the ERV cfm
limits. With this option the unit can be in free cooling or not
depending on the temperature of the OA compared to the
set point. When in free cooling:
Fig. 83 — Unlocking the
Segment Retaining Brackets
•
•
•
•
ERV wheel is turned off.
Outdoor air blower is on.
EXH blower motor is on.
Two-position damper is open (if used).
When not in free cooling:
•
•
•
•
ERV wheel is turned off.
Outdoor air blower motor is turned off.
EXH blower motor is turned off.
Two-position damper is closed (if used).
Alignment
Cassette
Pin
Housing/Frame
SERVICE
Shaft
Disconnect electrical power before servicing energy recov-
ery cassette.
Removing Wheel Segments for Cleaning
(62M170-950 Units)
Bearings (2)
1. Unlock and open the segment retaining brackets on both
Wheel &
Hub
Hub Cover
sides of the selected segment opening. Refer to Fig. 83.
2. Gently lift segment outward.
3. Close segment retaining latches and rotate wheel 180 de-
grees to remove next segment. Follow this pattern to
remove all segments. This pattern will help keep wheel
balanced.
Fig. 84 — 62M040 Energy
Transfer Wheel Assembly
75
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Removing and Installing Non-Segmented
Wheel for Cleaning (62M075, 120 Units) —
Non-segmented energy transfer wheels include the shaft and
are secured to two wheel support beams by two flange bearings
with locking collars. See Fig. 85.
To remove the energy transfer wheel follow Steps 1-4
below. Reverse procedure for wheel installation.
WHEEL,
HUB &
SHAFT
FLANGE
BEARINGS
(2)
1. Pull the wheel with shaft straight out of the motor side
wheel support beam and bearing. Handle wheel with care
to prevent distorting of the wheel.
2. Remove the pulley side wheel support beam with bearing
by removing the 4 support beam screws.
3. Remove the belt from the pulley and position temporarily
around the wheel rim.
SET
SCREWS
(2) EACH
4. Loosen the two set screws on each of the two wheel
bearings. See Fig. 85.
When replacing wheel, retighten the 4 bearing set screws.
Premature bearing failure could result.
WHEEL SUPPORT BEAMS
Fig. 85 — 62M075,120 Energy
Transfer Wheel Assembly
Installing Wheel Segments (62M170-950
Units)
Before performing service or maintenance operations on
unit, turn off main power switch to unit. Electrical shock
could cause personal injury.
HAMMER
USED AS
NOTE: Both installation and removal procedures must be per-
formed from the pulley side of the cassette.
“STOP”
Weight of the installed segment will cause the wheel to
accelerate in rotation. Failure to maintain control of the
wheel rotation while installing all segments could cause
severe injury to fingers or hand caught between revolving
spokes and the bearing support beam. Handle of hammer,
or other stop, should be inserted through spokes and above
or below bearing support beams to limit rotation of unbal-
anced wheel. See Fig. 86.
Fig. 86 — Using a Stop on the Wheel
NOTE: The 62M040-120 units contain non-segmented wheels
which must be completely removed to be cleaned.
1. Begin by positioning one segment opening at the top of
the cassette. Unlock and open the segment retaining
brackets on both sides of the selected segment opening.
2. Holding the segment as vertical as possible and
centered between spokes, insert nose of segment down-
ward between the hub plates. See Fig. 87.
NOTE: The face of the segment, with the imbedded
stiffener (vertical support between nose and rim end of
segment) must face the motor side of the cassette. See
Fig. 88.
3. Ease the segment downward until its outer rim clears the
inside of the wheel rim. Then press the segment inward
against the spoke flanges.
4. Close and latch segment retaining brackets to the position
shown in Fig. 89. Make certain the retaining bracket is
fully engaged under the catch.
5. Slowly rotate, by hand, the first installed segment to the
bottom of the cassette, then install the second segment
opposite the first. Repeat this sequence with the two
installed segments rotated to the horizontal position to
balance the weight of installed segments. Continue this
sequence with the remaining segments.
Fig. 87 — Inserting a Segment of the Wheel
76
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2. Using hexagonal wrench, loosen setscrew in bearing
locking collar. Using light hammer and drift (in drift pin
hole) tap collar in the direction of wheel rotation to
unlock collar. Remove collar.
Imbedded Stiffeners
3. Using socket wrench with extension, remove two nuts
which secure bearing housing to the bearing support
beam. Slide bearing from shaft.
NOTE: Slight hand pressure against wheel rim will
lift weight of wheel from inner race of bearing to assist
bearing removal and installation. If not removable by
hand, use bearing puller.
Fig. 88 — Motor Side View of Segment
Protect hands and belt from possible sharp edges of hole in
bearing support beam.
4. Using a wrench, remove diameter seal retaining screws or
hub seal retaining screws. Remove diameter seals or hub
seal from bearing beam. See Fig. 91.
5. Form a small loop of belt and pass it through the hole in
the bearing support beam. Grasp the belt at the wheel hub
and pull the entire belt down. Loop the trailing end of the
belt over the shaft (Fig. 91 shows belt partially through
the opening).
6. Reinstall the bearing onto the wheel shaft, being careful
to engage the two locating pins into the holes in the
bearing support beam. Secure the bearing with two
self-locking nuts.
PULL TAB
CATCH
Fig. 89— Latch Segment Retaining Brackets
Wheel Drive Motor and Pulley Replacement
(62M170-095 Units)
1. Disconnect power to wheel drive motor.
2. Remove belt from pulley and position temporarily around
wheel rim.
3. Loosen setscrew in wheel drive pulley using Allen
wrench and remove pulley from motor drive shaft.
4. While supporting weight of drive motor in one hand,
loosen and remove 4 mounting bolts.
5. Install replacement motor with hardware kit supplied.
6. Install pulley to dimension shown in Fig. 90 and secure
setscrew to drive shaft.
7. Stretch belt over pulley and engage in groove.
7. Install the belts around the wheel and pulley according to
the instructions provided with the belt.
8. Reinstall diameter seals or hub seal and tighten retaining
screws. Rotate wheel in clockwise direction to determine
that wheel rotates freely with slight drag on seals.
9. Reinstall bearing locking collar. Rotate collar by hand in
the direction the wheel rotates (see label provided on each
cassette for wheel rotation). Lock in position by tapping
drift pin hole with hammer and drift. Secure in position
by tightening setscrew.
10. Reinstall bearing access cover.
11. Apply power to wheel and ensure that the wheel rotates
freely without interference.
ALTERNATE BELT REPLACEMENT METHODS — Alter-
nate belt replacement methods may be used in some applica-
tions depending upon accessibility of the cassette. Consult
instructions provided with the belt for further information.
Belt Replacement
1. Obtain access to the pulley side bearing access plate.
Remove two bearing access plate retaining screws and
the access plate.
Insulation
Seal
Plate
62M
ERV
WHEEL DIMENSION A
UNIT SIZE WHEEL SERIES
(in.)
Dimension A
170
225
285
330
430
550
640
750
950
ERC-3623
ERC-3623
ERC-3628
ERC-5245
ERC-5245
ERC-5262
ERC-5262
ERC-6488
ERC-6488
36
36
36
52
52
52
52
64
64
Wheel
Drive
Motor
1
/
4
Pulley
7
/
16
NOTE: The ERV wheel model number contains the wheel series number,
and is located on a label near the drive pulley. For example, ERC-5245D is
a 52 series wheel.
Fig. 90 — Pulley Location
77
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Belt (Shown in
Place)
Locking
Collar
Bearing
Support
Beam
Wheel Rim
Locking
Nut (2)
Wheel
Bearing
Access Plate
Bearing
Housing
Hub (2)
Taper - Lock
Hub Collar (2)
Retaining
Screws
Set Screw
Shaft
Drift Hole
Locating Pin
PULL
FEED
Belt
Pulley
Side
Motor
Side
Fig. 91 — Belt Replacement (Diameter Seals Removed)
MAINTENANCE
To clean, gain access to the energy recovery wheel and
remove wheel. Brush foreign material from the face of the
wheel. Wash the wheel in a 5% solution of non-acid based coil
cleaner or alkaline detergent and warm water.
Routine maintenance of the energy recovery cassettes
includes periodic cleaning of the energy recovery wheel as well
as inspection of the air seals and wheel drive components as
follows:
Soak in the solution until grease and tar deposits are
loosened.
Cleaning — The need for periodic cleaning of the energy
recovery wheel will be a function of operating schedule, cli-
mate and contaminants in the indoor air being exhausted, and
the outdoor air being supplied to the building.
The air exchange wheel is “self-cleaning” with respect to
dry particles due to its laminar flow characteristics. Smaller
particles pass through; larger particles land on the surface and
are blown clear as the flow direction is reversed. Any material
that builds up on the face of the wheel can be removed with a
brush or vacuum. The primary need for cleaning is to remove
oil-based aerosols that have condensed on energy transfer
surfaces.
NOTE: Some staining of the desiccant may remain and is not
harmful to performance.
Before removing, rapidly run finger across surface of wheel
to separate polymer strips for better cleaning action. Rinse
dirty solution from wheel and remove excess water before
reinstalling.
Do not use acid based cleaners, aromatic solvents, steam or
temperatures in excess of 170 F; damage to the wheel may
result.
A characteristic of all dry desiccants, such films can close
off micron sized pores at the surface of the desiccant material,
reducing the efficiency by which the desiccant can adsorb and
desorb moisture and also build up so as to reduce airflow.
Air Seals — Diameter seals are provided on each cassette
to minimize transfer of air between the counter flowing
airstreams.
In a reasonably clean indoor environment such as a school
or office building, measurable reductions of airflow or loss of
sensible effectiveness may not occur for several years. Measur-
able changes in latent energy transfer can occur in shorter
periods of time in applications such as moderate occupant
smoking or cooking facilities. In applications experiencing
unusually high levels of occupant smoking or oil-based aero-
sols such as industrial applications involving the ventilation of
machine shop areas for example, annual washing of energy
transfer may be necessary to maintain latent transfer efficiency.
Proper cleaning of the energy recovery wheel will restore latent
effectiveness to near original performance.
To adjust diameter seals, loosen diameter seal adjusting
screws and back seals away from wheel surface (Fig. 92).
Rotate wheel clockwise until two opposing spokes are hidden
behind the bearing support beam. Using a folded piece of paper
as a feeler gage, position paper between the wheel surface and
diameter seals. Adjust seals towards wheel surface until a slight
friction on the feeler gage (paper) is detected when gage is
moved along the length of the spoke. Retighten adjusting
screws and recheck clearance with “feeler” gage.
78
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Wheel Drive Components — The wheel drive motor
bearings are pre-lubricated and no further lubrication is neces-
sary. Make certain air cooling ports are not blocked.
Rotation
The wheel drive a pulley is secured to the drive motor shaft
by a setscrew. The setscrew is secured with removable adhe-
sive to prevent loosening. Annually confirm setscrew is secure.
The wheel drive belt is a urethane stretch belt designed to
provide constant tension through the life of the belt. No adjust-
ment is required. Inspect the drive belt annually for proper
tracking and tension. A properly tensioned belt will turn
the wheel immediately after power is applied with no visible
slippage during start-up.
To
Adjust
Adjusting Screws
Feeler Gage
Fig. 92 — Diameter Seal Adjustment
79
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Copyright 2006 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 536-220 Printed in U.S.A. Form 62M-1SI Pg 80 1-06 Replaces: New
Book 1
4
Tab 10a 12a
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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
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