PERFORMANCE™ 13 50XP
SINGLE-PACKAGED ELECTRIC COOLING UNITS
WITH PURON® (R-410A) REFRIGERANT
2 to 5 Nominal Tons
Product Data
Single-Packaged Products with
Energy-Saving Features and Puron®
refrigerant.
• Low Sound Levels
• 13 SEER
• Variable Speed Blower-Standard
• Factory Installed TXV
Features/Benefits
One-piece cooling unit with optional
electric heater, low installation cost,
dependable performance and easy
maintenance.
Efficient operation
High-efficiency design with a SEER
(Seasonal Energy Efficiency Ratio)
of 13.0.
Puron® Environmentally Sound
Refrigerant is Carrier’s unique
refrigerant designed to help protect the
environment. Puron is an HFC
refrigerant which does not contain
chlorine that can harm the ozone layer.
The most important advantage of
Puron refrigerant is that it has not been
banned in future air conditioning
systems as the traditional refrigerant
R-22 has been. Puron refrigerant is in
service in thousands of systems
proving highly reliable,
UNIT 50XP
environmentally sound performance.
IdealHumidity™ Technology
featuring Thermidistat control and
Variable Speed Blower motor that
provides greater comfort, humidity
control, and energy efficiency. You can
expect up to 30 times better
dehumidification; economical constant
fan for less than $50 a year, which
provides improved indoor air quality
and more even temperatures from room
to room; and reduced indoor noise due
to lower air velocity. In addition, you’ll
realize improved installation flexibility
with 3 different airflow choices for best
overall comfort.
Easy Installation
Factory-assembled package is a
compact, fully self-contained, electric
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Model number nomenclature
—
50XP
024
3
Options
BT – AL evap, vinyl condens
CC – AL evap, CU condens
Model Number
50XP – Single
Packaged-Electric
Cooling
Options
CU – CU evap & condens
(None) – Wire Grille
TP – Base unit with tin plated indoor coil
AD – Louvered Grille
hairpins
TV – TP with vinyl coating on outdoor coil
BT – Wire Grille and Vinyl-Coated Condenser
Coil Fin
TC – TP with AL indoor coil & CU/CU out-
XT – Louvered Grille and Vinyl-Coated Con-
door coil
denser Coil Fin
Nominal Cooling Capacity
024 – 2 ton
030 – 2.5 ton
036 – 3 ton
042 – 3.5 ton
048 – 4 ton
060 – 5 ton
CC – Wire Grille, AL Evaporator and CU/CU
Only used if ordering an option
Condenser Coil
AC – Louvered Grille, AL Evaporator and CU/
CU con
V-Ph-Hz
3 – 208/230-1-60
5 – 208/230-3-60
AL — Aluminum
CU — Copper
ARI* capacities
COOLING CAPACITIES AND EFFICIENCIES
NET COOLING
STANDARD
CFM
SOUND
RATINGS‡
(dB)
UNIT
50XP
NOMINAL
TONS
CAPACITIES
(Btuh)
EER@A**
SEER†
024
030
036
042
048
060
2
2-1/2
3
800
24,000
28,800
36,000
41,000
45,000
57,000
11.0
11.0
11.0
11.0
11.0
11.0
13.0
13.0
13.0
13.0
13.0
13.0
72
72
72
72
78
78
1000
1100
1400
1450
1710
3-1/2
4
5
LEGEND
— Sound Levels (decibels)
— Dry Bulb
‡ Tested in accordance with ARI Standard 270-95 (not listed in ARI).
NOTES:
dB
db
1. Ratings are net values, reflecting the effects of circulating fan heat.
Ratings are based on:
SEER — Seasonal Energy Efficiency Ratio
wb — Wet Bulb
* Air Conditioning & Refrigeration Institute.
** “A” Conditions- 80°F indoor db/67°F indoor wb & 95°F outdoor db.
† Rated in accordance with U.S. Government DOE Department of
Energy) test procedures and/or ARI Standard 210/240-94.
Cooling Standard: 80°F db, 67°F wb indoor entering-air tempera-
ture and 95°F db outdoor entering-air temperature.
2. Before purchasing this appliance, read important energy cost and
efficiency information available from your retailer.
3
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OUTDOOR SOUND: OCTAVE BAND DATA—DECIBELS (Lw(A))
MODEL NO.
50XP
Frequency (Hz)
024
58.8
63.5
67.2
66.9
63.7
58.3
50.0
030
58.8
63.5
67.2
66.9
63.7
58.3
50.0
036
60.7
63.3
66.8
66.5
64.2
60.3
53.0
042
56.7
62.8
67.8
67.4
63.7
57.7
50.8
048
62.4
69.9
71.3
73.4
70.0
66.3
60.1
060
63.5
67.6
71.8
75.5
71.0
68.1
59.9
125
250
500
1000
2000
4000
8000
Physical data
UNIT SIZE 50XP
024
2
030
2-1/2
343
036
3
042
3-1/2
433
048
4
060
NOMINAL CAPACITY (ton)
OPERATING WEIGHT (lb)
COMPRESSOR
5
343
366
Scroll
456
492
REFRIGERANT (R-410A)
Quantity (lb)
7.3
8.0
9.5
10.7
TXV
11.25
TXV
13.2
TXV
REFRIGERANT METERING DEVICE
(Indoor)
TXV
TXV
TXV
CONDENSER COIL
Rows—Fins/in.
Face Area (sq ft)
2—21
11.95
2—21
12.0
2—21
13.6
2—21
15.4
2—21
17.4
2—21
19.3
CONDENSER FAN
Nominal Cfm
Diameter (in.)
2350
22
1/8 (825)
2700
22
1/8 (825)
2350
22
1/8 (825)
2800
22
1/8 (825)
3300
22
1/4 (1100)
3300
22
1/4 (1100)
Motor Hp (Rpm)
EVAPORATOR COIL
Rows—Fins/in.
Face Area (sq ft)
3—15
3.7
3—15
3.7
4—15
3.7
3—15
4.7
4—15
4.7
4—17
5.7
EVAPORATOR BLOWER
Nominal Airflow (Cfm)
Size (in.)
800
10 x 10
1/2
1000
10 x 10
1/2
1100
11 x 10
3/4
1400
11 x 10
3/4
1400
11 x 10
3/4
1750
11 x 10
1.0
Motor (Hp)
HIGH-PRESSURE SWITCH (psig)
Cutout
Reset (Auto.)
610 ± 15
420 ± 25
LOSS-OF-CHARGE/LOW-PRESSURE
SWITCH
(Liquid Line) (psig)
Cutout
Reset (Auto.)
20 ± 5
45 ± 10
RETURN-AIR FILTERS (in.)*
Throwaway
20 x 20 x 1
20 x 20 x 1
20 x 24 x 1
24 x 30 x 1
24 x 30 x 1
24 x 30 x 1
* Required filter sizes shown are based on the larger of the ARI (Air Conditioning & Refrigeration Institute) rated
cooling airflow or the heating airflow velocity of 300 ft/min for throwaway type or 450 ft/min for high-capacity
type. Air filter pressure drop for non-standard filters must not exceed 0.08 in. wg.
4
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Options and accessories
Factory-installed options
Coil options include Tin-Plated* indoor hairpins, copper/
copper and vinyl-coated construction for refrigerant coils.
Units are shipped standard with copper tube/aluminum fin
construction. See model number nomenclature for coil
options.
*Tin-Plated indoor coils are built with special hairpins
that are designed to resist both general pitting corrosion
and excessive indoor corrosion (Formicary Corrosion).
power supply for the entire unit, resulting in lower installed
costs.
Flat roof curbs in both 8 in. and 14 in. sizes are available
for roof mounted applications.
Square-to-round duct transition kit enables 024-048 size
units to be fitted to 14 in. round ductwork.
Thermidistat Control coupled with the system’s variable
speed indoor blower delivers Carrier’s patented
IdealHumidity™ Technology that allows for even greater
humidity control. Along with more precisely controlling
temperature and humidity, the Thermidistat offers full
seven-day programmability allowing you to further
customize your comfort and energy savings.
Field-installed accessories
Economizer with Solid-State Controls and Barometric
Relief Dampers
Manual Air Damper (25% open)
Electric Heaters
Thermostats provide control for the system heating and
cooling functions. Thermostat models are available in both
programmable and non-programmable versions.
Filter Rack
Flat Roof Curbs (8-in. and 14-in.)
Square-to-Round Duct Transition Kit
Thermidistat™
Lifting kit, including 4 metal brackets that are available to
assist in lifting this product onto a roof application.
Thermostats
Crankcase Heater
Crankcase heater provides anti-floodback protection for
low-load cooling applications.
Rigging Kit
Low Ambient Kit (Motormaster® II Control)
Solid-State Time Guard® II Device
Lifting Kit
Low-ambient kit (Motormaster II control) allows the
use of mechanical cooling down to outdoor temperatures as
low as 0°F.
Compressor Hard Start Kit
Solid-state Time Guard II device provides short-cycling
protection for the compressor. Not required with corporate
electronic thermostats.
Economizer with solid-state controls and barometric
relief dampers includes filter racks and provide outdoor air
during cooling and reduce compressor operation.
Manual outside air damper includes hood and filter rack
with adjustable damper blade for up to 25% outdoor air.
Electric heaters provide heat in the unit when required.
Each package has a heater module that slides into the
controls compartment. Heater sizes range from 5 to 20 kW.
The electric heater design allows the use of a single-point
Filter rack features easy installation, serviceability, and
high-filtering performance for vertical or horizontal
applications.
Compressor Hard start kit assists compressor start-up by
providing additional starting torque on single phase units
and prolongs compressor motor life.
ELECTRIC HEATERS
USED WITH SIZES
036 042
ELECTRIC HEATERS (208/230 — SINGLE PHASE — 60 Hz)
ODS CATALOG
ORDERING NO.
NOMINAL CAPACITY
(kW)
024
030
048
060
CPHEATER052A00
CPHEATER069A00
CPHEATER065A00
CPHEATER051A00
CPHEATER053A00
5.0
7.5
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
10.0
15.0
20.0
ELECTRIC HEATERS (208/230 — 3 PHASE — 60 Hz)
CPHEATER055A00
CPHEATER056A00
CPHEATER057A00
CPHEATER059A00
5.0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
10.0
15.0
20.0
LEGEND
ODS — Order Distribution System
NOTE: Electric heaters are rated at 240 v. Refer to Multiplication Factors table for other voltages.
MINIMUM AIRFLOW FOR RELIABLE ELECTRIC HEATER OPERATION
UNIT
024
030
036
042
048
060
1800
AIRFLOW
750
750
1250
1205
1500
5
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ECONOMIZER
FILTER RACK
MANUAL OUTSIDE AIR DAMPER
REPLACEMENT
PANEL
MANUAL OUTSIDE
AIR HOOD
DAMPER
BLADE
6
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Base unit dimensions—50XP024-036
CENTER OF GRAVITY
in. [mm]
UNIT HEIGHT
in. [mm]
“A”
UNIT WEIGHT
ELECTRICAL
CHARACTERISTICS
UNIT
lb
kg
X
Y
Z
50XP024
50XP030
50XP036
208/230-1-60
208/230-1-60
343
343
366
156
156
166
39.02 [991.1]
39.02 [991.1]
41.02 [1041.9]
20 [508]
20 [508]
20 [508]
19.3 [489]
19.3 [489]
14 [355.6]
17.6 [447]
17.6 [447]
13 [330.2]
208/230-1-60, 208/230-3-60
50XP 024-036 Dimensions
7
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Base unit dimensions—50XP042-060
CENTER OF GRAVITY
in. [mm]
UNIT HEIGHT
in. [mm]
“A”
UNIT WEIGHT
ELECTRICAL
CHARACTERISTICS
UNIT
lb
kg
X
Y
Z
50XP042
50XP048
50XP060
208/230-1-60, 208/230-3-60
208/230-1-60, 208/230-3-60
208/230-1-60, 208/230-3-60
433
456
492
197
207
223
42.98 [1091.7]
44.98 [1142.5]
46.98 [1193.3]
21 [533.4] 20.5 [520.2] 16.6 [421.6]
19.5 [495.3] 17.6 [447.6] 18.0 [457.2]
21 [533.4]
20 [508]
17.6 [447.0]
50XP 042-060 Dimensions
8
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Accessory dimensions
A
in. [mm]
B
in. [mm]
C
in. [mm]
D
in. [mm]
UNIT SIZE
ODS CATALOG NUMBER
CPRFCURB006A00
CPRFCURB007A00
CPRFCURB008A00
CPRFCURB009A00
8 [203]
14 [356]
8 [203]
11 [279]
16-1/2 [419]
16-1/2 [419]
17-3/8 [441]
17-3/8 [441]
28-3/4 [730]
28-3/4 [730]
40-1/4 [1022]
40-1/4 [1022]
50XP024-036
11 [279]
16-3/16 [411]
16-3/16 [411]
50XP042-060
14 [356]
NOTES:
1. Roof curb must be set up for unit being installed.
2. Seal strip must be applied, as required, to unit being installed.
3. Dimensions in [ ] are in millimeters.
4. Roof curb is made of 16-gage steel.
5. Table lists only the dimensions, per part number, that have changed.
6. Attach ductwork to curb (flanges of duct rest on curb).
7. Insulated panels: 1-in. thick fiberglass 1 lb density.
8. Dimensions are in inches.
9. When unit mounting screw is used (see Note A), a retainer bracket must be used as well.This bracket must also be used when required by code
for hurricane or seismic conditions. This bracket is available through Micrometl.
HVAC unit
base
HVAC unit
base
Gasketing
inner flange*
Screw
(NOTE A)
Screw
(NOTE A)
Gasketing
inner flange*
*Gasketing
outer flange
*Gasketing
outer flange
Wood nailer*
Wood nailer*
Flashing field
supplied
Flashing field
supplied
Roofcurb*
Roofcurb*
Insulation (field
supplied)
Insulation (field
supplied)
Roofing material
field supplied
Roofing material
field supplied
Duct work
field supplied
Duct work
field supplied
Cant strip
field supplied
Cant strip
field supplied
Roof
Roof
*Provided with roofcurb
*Provided with roofcurb
Roof Curb for Small Cabinet
Roof Curb for Large Cabinet
Note A: When unit mounting screw is used,
retainer bracket must also be used.
Note A: When unit mounting screw is used,
retainer bracket must also be used.
Supply opening
(B x C)
B Typ.
D
C Typ.
44 5/16"
(1125.5mm)
R/A
S/A
A
Short
Support
Insulated
deck pan
Long
Support
Return opening
(B X C)
C00076
9
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50XP Corner weights (In Pounds)
1
2
3
y
4
x
Small Base
Large Base
030
69
036
74
042
87
048
92
060
99
Model 50XP
Corner Weight #1
Corner Weight #2
Corner Weight #3
Corner Weight #4
Total Weight
024
69
53
53
57
67
71
77
83
83
88
104
174
433
110
183
456
119
198
492
138
343
138
343
147
366
Selection Procedure
I Determine cooling and heating requirements at design
conditions:
Given:
closely satisfies the heating required. To calculate kW at
208v, multiply the heater kW by multiplication factor 0.75
found in the Wattage Multiplication Factors table.
5 kW x 0.75 = 3.75 kW
Required Cooling Capacity (TC). . . . . . . . . . 34,500 Btuh
Sensible Heat Capacity (SHC). . . . . . . . . . . . 26,000 Btuh
Required Heating Capacity . . . . . . . . . . . . . . 15,000 Btuh
Condenser Entering Air Temperature . . . . . . . . . . . . 95°F
Indoor-Air Temperature. . . . . . . . . . . 80°F edb, 67°F ewb
Evaporator Air Quantity . . . . . . . . . . . . . . . . . . 1200 cfm
External Static Pressure . . . . . . . . . . . . . . . . . . . 0.2 in. wg
Electrical Characteristics . . . . . . . . . . . . . . . . . . .230-1-60
3.75 kW x 3414 Btuh/kW = 12,802.50 Btuh
IV Determine fan speed and power requirements at design
conditions.
Before entering the air delivery tables, calculate the total
static pressure required. From the given, Filter Pressure
Drop table, and the Accessory Electric Heat Pressure Drop
table, find:
II Select unit based on required cooling capacity.
Enter Cooling Capacities table at condenser entering
temperature of 95°F. The 036 unit at 1225 cfm and 67°F
ewb (entering wet bulb) will provide a total capacity of
36,500 Btuh and a SHC of 27,600 Btuh. Calculate SHC
correction, if required, using Note 4 under Cooling
Capacities tables.
Wet coil pressure drop
External static pressure
Filter
0.032 in. wg
0.200 in. wg
0.130 in. wg
Total static pressure
0.362 in. wg
Enter the table for Dry Coil Air Delivery — At 0.362 in. wg
external static pressure and NOM speed pin selection, the
motor delivers 1235 cfm.
III Select electric heat.
The required heating capacity is 15,000 Btuh (given).
Determine the electric heat capacity in kW.
15,000 Btuh
V Select unit that corresponds to power source available.
The Electrical Data table shows that the unit is designed to
operate at 208/230-1-60.
= 4.4 kW of heat required
3414 Btuh/kW
Enter the Electric Heater Packages table for 208/240,
single-phase, 036 unit. The 5-kW heater at 240v most
10
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Performance data-Standard ECM Indoor Motor
COOLING CAPACITIES
50XP024 COOLING PERFORMANCE TABLE
Evaporator Air—CFM/BF
Temp (F)
800/0.026
900/0.032
1000/0.04
Outdoor Air
Entering
Condenser
Evaporator Air — Ewb (F)
62
63*
67
72
62
63*
67
72
62
63*
67
72
TC
SHC
24.0
21.9
1.7
24.5
21.3
1.7
26.5
18.7
1.8
29.1
15.4
1.8
24.6
23.5
1.8
25.1
22.8
1.8
27.1
19.8
1.8
29.8
16.1
1.8
25.1
25.0
1.8
25.5
24.2
1.8
27.4
20.8
1.8
30.4
16.7
1.9
75
kW
TC
22.9
21.4
1.9
23.3
20.7
1.9
25.3
18.1
2.0
27.9
14.9
2.0
23.5
22.9
2.0
23.9
22.2
2.0
25.8
19.2
2.0
28.5
15.6
2.0
23.9
24.3
2.0
24.3
23.6
2.0
26.2
20.3
2.1
28.9
16.2
2.1
SHC
85
95
kW
TC
21.8
20.8
2.2
22.2
20.2
2.2
24.0
17.6
2.2
26.5
14.3
2.2
22.3
22.3
2.2
22.6
21.6
2.2
24.5
18.7
2.2
27.0
15.0
2.2
22.7
23.6
2.2
23.0
22.9
2.2
24.8
19.7
2.3
27.4
15.6
2.3
SHC
kW
TC
20.5
20.2
2.4
20.9
19.5
2.4
22.6
16.9
2.4
25.0
13.7
2.4
21.0
21.6
2.4
21.3
20.9
2.4
23.0
18.0
2.5
25.4
14.3
2.5
21.6
22.5
2.5
21.7
22.2
2.5
23.3
19.0
2.5
25.7
14.9
2.5
SHC
105
115
125
kW
TC
19.2
19.4
2.7
19.5
18.8
2.7
21.1
16.3
2.7
23.3
13.0
2.7
19.8
20.6
2.7
19.9
20.2
2.7
21.5
17.3
2.7
23.7
13.7
2.7
20.7
21.5
2.7
20.4
21.2
2.7
21.7
18.3
2.8
23.6
14.1
2.8
SHC
kW
TC
17.8
18.5
2.9
18.0
18.1
2.9
19.4
15.5
3.0
21.4
12.3
3.0
18.5
19.2
3.0
18.5
19.2
3.0
19.5
16.5
3.0
21.7
12.9
3.0
19.0
19.8
3.0
19.0
19.7
3.0
19.9
17.6
3.1
21.9
13.5
3.1
SHC
kW
50XP030 COOLING PERFORMANCE TABLE
Temp (F)
Evaporator Air—CFM/BF
1000/0.07
875/0.06
1125/0.08
Outdoor Air
Entering
Condenser
Evaporator Air — Ewb (F)
62
63*
67
72
62
63*
67
72
62
63*
67
72
TC
SHC
kW
27.9
24.1
2.1
28.6
20.0
2.1
30.7
20.6
2.1
33.6
16.8
2.1
28.8
26.0
2.1
29.4
21.2
2.1
31.6
22.1
2.1
34.5
17.8
2.2
29.3
27.0
2.1
30.0
22.6
2.1
32.2
23.5
2.1
35.2
18.7
2.2
75
85
TC
SHC
kW
26.9
23.8
2.3
27.5
19.5
2.3
29.5
20.3
2.4
32.3
16.4
2.4
27.6
25.6
2.3
28.1
20.8
2.4
30.2
21.7
2.4
33.1
17.4
2.4
28.3
26.5
2.4
28.7
22.1
2.4
30.8
23.1
2.4
33.7
18.3
2.4
TC
SHC
kW
25.6
23.1
2.6
26.2
19.1
2.6
28.2
19.9
2.6
30.8
16.0
2.6
26.3
24.7
2.6
26.8
20.5
2.6
28.8
21.3
2.6
31.5
16.9
2.6
27.0
26.2
2.6
27.3
21.7
2.6
29.3
22.6
2.6
32.0
17.8
2.6
95
TC
SHC
kW
24.3
22.4
2.9
24.7
18.6
2.9
26.6
19.3
2.9
29.2
15.4
2.9
25.1
23.8
2.9
25.3
19.9
2.9
27.2
20.8
2.9
29.7
16.3
2.9
25.9
24.4
2.9
25.7
21.1
2.9
27.5
22.1
2.9
30.1
17.2
2.9
105
TC
SHC
kW
22.8
21.7
3.2
23.2
18.0
3.2
24.9
18.8
3.2
27.3
14.8
3.2
23.8
22.3
3.2
23.6
19.3
3.2
25.3
20.2
3.2
27.7
15.7
3.2
24.5
23.7
3.2
24.0
20.5
3.2
25.7
21.5
3.2
28.1
16.6
3.2
115
125
TC
SHC
kW
21.4
20.7
3.5
21.4
17.3
3.5
24.9
18.8
3.2
27.3
14.8
3.2
23.8
22.3
3.2
23.6
19.3
3.2
25.3
20.2
3.2
27.7
15.7
3.2
24.5
23.7
3.2
24.0
20.5
3.2
25.7
21.5
3.2
28.1
16.6
3.2
See Legend and Notes on page 13.
11
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Performance data (cont)-Standard ECM Indoor Motor
COOLING CAPACITIES
50XP036 COOLING PERFORMANCE TABLE
Evaporator Air—CFM/BF
Temp (F)
1100/0.06
1225/0.07
1400/0.08
Outdoor Air
Entering
Condenser
Evaporator Air — Ewb (F)
62
63*
67
72
62
63*
67
72
62
63*
67
72
36.2
36.8
39.7
43.8
36.9
37.4
40.3
44.4
37.9
38.1
41.0
45.1
TC
SHC
kW
75
85
33.2
2.7
34.6
32.4
2.9
33.0
31.6
3.2
31.3
30.6
3.6
29.6
29.3
4.0
27.8
27.5
4.4
26.7
2.7
35.1
26.0
2.9
33.4
25.3
3.2
31.5
24.5
3.6
29.4
23.7
4.0
27.2
22.8
4.3
27.8
2.7
37.9
27.1
3.0
36.0
26.4
3.3
34.0
25.6
3.6
31.8
24.8
4.0
29.4
23.9
4.4
22.3
2.7
41.8
21.6
3.0
39.7
20.9
3.3
37.5
20.1
3.6
35.0
19.3
4.0
32.4
18.4
4.4
34.7
2.7
35.3
34.0
3.0
33.7
32.9
3.3
32.1
31.5
3.6
30.4
30.0
4.0
28.4
28.2
4.4
27.9
2.7
35.6
27.1
3.0
33.8
26.4
3.3
31.9
25.7
3.6
29.8
24.8
4.0
27.5
23.8
4.4
29.0
2.7
38.4
28.3
3.0
36.5
27.6
3.3
34.3
26.8
3.7
32.1
26.0
4.0
29.7
25.0
4.4
23.1
2.8
42.4
22.4
3.0
40.2
21.7
3.4
37.9
20.9
3.7
35.4
20.0
4.0
32.7
19.1
4.4
36.9
2.8
36.4
35.6
3.1
34.8
34.4
3.4
33.1
32.8
3.8
31.3
31.0
4.1
29.3
29.0
4.5
29.6
2.8
36.3
28.9
3.1
34.4
28.1
3.4
32.4
27.3
3.7
30.3
26.4
4.1
28.0
25.4
4.5
30.9
2.8
39.1
30.2
3.1
37.0
29.4
3.4
34.9
28.6
3.8
32.6
27.7
4.1
30.1
26.7
4.5
24.2
2.9
43.1
23.6
3.2
40.8
22.8
3.5
38.4
22.0
3.8
35.8
21.1
4.2
33.0
20.2
4.5
TC
SHC
kW
TC
SHC
kW
95
TC
SHC
kW
105
TC
SHC
kW
115
125
TC
SHC
kW
50XP042 COOLING PERFORMANCE TABLE
Temp (F)
Evaporator Air—CFM/BF
1225/0.07
1100/0.06
1400/0.08
Outdoor Air
Entering
Condenser
Evaporator Air — Ewb (F)
62
63*
67
72
62
63*
67
72
62
63*
67
72
TC
SHC
kW
39.6
33.5
3.0
40.4
27.6
3.0
43.4
28.6
3.0
47.6
23.4
3.1
40.5
35.4
3.0
41.2
29.0
3.0
44.2
30.0
3.0
48.4
24.3
3.1
41.5
37.9
3.0
42.1
30.8
3.0
45.1
31.9
3.0
49.4
25.6
3.1
75
85
TC
SHC
kW
37.9
32.8
3.3
38.7
26.9
3.3
41.5
27.8
3.4
45.5
22.7
3.4
38.7
34.6
3.3
39.4
28.2
3.3
42.3
29.2
3.4
46.3
23.6
3.4
39.7
37.0
3.3
40.2
30.0
3.3
43.2
31.1
3.4
47.2
24.8
3.4
TC
SHC
kW
36.2
32.0
3.7
36.8
26.1
3.7
39.6
27.0
3.7
43.4
21.9
3.8
36.9
33.8
3.7
37.5
27.4
3.7
40.3
28.4
3.7
44.1
22.8
3.8
37.8
35.9
3.7
38.2
29.1
3.7
41.0
30.3
3.7
44.9
24.0
3.8
95
TC
SHC
kW
34.2
31.0
4.1
34.8
25.2
4.1
37.4
26.2
4.1
41.0
21.1
4.1
34.9
32.7
4.1
35.4
26.5
4.1
38.0
27.6
4.1
41.6
22.0
4.1
36.0
34.3
4.1
36.0
28.3
4.1
38.7
29.4
4.1
42.3
23.2
4.1
105
TC
SHC
kW
32.1
30.0
4.5
32.6
24.3
4.5
35.0
25.2
4.5
38.4
20.2
4.5
32.8
31.4
4.5
33.1
25.6
4.5
35.5
26.6
4.5
38.9
21.0
4.6
34.0
32.8
4.5
33.7
27.3
4.5
36.1
28.5
4.5
39.5
22.2
4.6
115
125
TC
SHC
kW
29.8
28.6
4.9
30.1
23.2
4.9
32.3
24.2
4.9
35.3
19.1
5.0
30.6
29.6
4.9
30.5
24.5
4.9
32.7
25.5
4.9
35.7
20.0
5.0
31.7
30.6
4.9
31.0
26.1
4.9
33.2
27.3
4.9
36.2
21.1
5.0
See Legend and Notes on page 13.
12
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Performance data (cont)-Standard ECM Indoor Motor
COOLING CAPACITIES
50XP048 COOLING PERFORMANCE TABLE
Evaporator Air—CFM/BF
Temp (F)
1260/0.06
1400/0.06
1600/0.08
Outdoor Air
Entering
Condenser
Evaporator Air — Ewb (F)
62
63*
67
72
62
63*
67
72
62
63*
67
72
45.0
45.8
49.6
54.7
46.7
47.3
51.2
56.3
48.1
48.7
52.5
57.8
TC
SHC
kW
75
85
39.3
3.4
42.8
38.2
3.7
40.6
36.9
4.1
38.2
35.7
4.6
35.7
34.4
5.0
33.4
32.1
5.6
32.0
3.4
43.6
30.9
3.7
41.3
29.8
4.1
38.9
28.7
4.6
36.3
27.5
5.0
33.4
26.2
5.6
33.4
3.4
47.2
32.3
3.8
44.7
31.2
4.2
42.1
30.1
4.6
39.3
28.9
5.1
36.2
27.6
5.6
27.2
3.4
52.1
26.2
3.8
49.4
25.2
4.2
46.4
24.0
4.6
43.3
22.9
5.1
39.4
21.5
5.7
42.6
3.4
44.3
41.3
3.7
41.8
39.9
4.1
39.6
38.3
4.6
38.2
35.7
5.1
34.6
33.8
5.6
34.3
3.4
44.9
33.2
3.7
42.4
32.0
4.1
39.8
30.7
4.6
37.1
29.5
5.0
34.1
28.2
5.6
35.8
3.4
48.6
34.7
3.8
46.0
33.6
4.2
43.1
32.3
4.6
40.1
31.0
5.1
36.9
29.7
5.6
28.9
3.5
53.5
27.7
3.8
50.7
26.7
4.2
47.6
25.5
4.7
44.2
24.3
5.1
40.5
22.9
5.6
45.8
3.4
45.6
44.3
3.8
44.2
43.0
4.2
41.5
40.0
4.6
38.7
38.2
5.1
36.1
35.6
5.6
36.8
3.4
46.1
35.5
3.8
43.7
34.6
4.1
40.8
33.2
4.6
37.9
31.8
5.1
34.8
30.2
5.6
38.4
3.4
49.9
37.3
3.8
47.0
36.1
4.2
44.0
34.8
4.6
40.8
33.5
5.1
37.5
31.9
5.6
30.6
3.5
54.8
29.4
3.8
51.8
28.3
4.2
48.5
27.0
4.7
45.0
25.8
5.1
41.2
24.4
5.6
TC
SHC
kW
TC
SHC
kW
95
TC
SHC
kW
105
TC
SHC
kW
115
125
TC
SHC
kW
50XP060 COOLING PERFORMANCE TABLE
Temp (F)
Evaporator Air—CFM/BF
1750/0.007
1500/0.004
2000/0.01
Outdoor Air
Entering
Condenser
Evaporator Air — Ewb (F)
62
63*
67
72
62
63*
67
72
62
63*
67
72
57.2
58.2
62.4
68.1
58.8
59.7
64.0
69.8
60.0
60.8
64.9
70.8
TC
SHC
kW
75
85
49.4
4.1
54.7
48.2
4.5
52.2
47.0
5.0
49.4
45.7
5.5
46.5
44.3
6.1
43.3
42.8
6.7
47.9
4.1
55.6
46.7
4.5
53.0
45.4
5.0
50.2
44.1
5.6
47.2
42.7
6.2
43.9
41.2
6.8
41.6
4.2
59.7
40.4
4.6
56.9
39.2
5.1
53.8
37.9
5.6
50.5
36.4
6.2
46.7
34.9
6.8
33.8
4.2
65.2
32.6
4.7
62.0
31.4
5.2
58.7
30.1
5.7
55.0
28.7
6.3
52.2
27.8
6.8
53.6
4.2
56.2
52.4
4.7
53.5
51.1
5.1
50.7
49.8
5.7
48.1
48.1
6.2
45.2
45.2
6.8
51.8
4.3
57.0
50.5
4.7
54.3
49.2
5.2
51.4
47.9
5.7
48.3
46.6
6.3
45.1
45.1
6.9
44.5
4.3
61.1
43.2
4.8
58.0
41.9
5.3
54.8
40.6
5.8
51.3
39.2
6.4
47.4
37.6
7.0
35.4
4.4
66.6
34.2
4.9
63.2
32.9
5.3
59.6
31.6
5.9
56.8
30.6
6.4
52.5
28.9
7.0
57.6
4.4
57.4
56.3
4.8
55.0
55.0
5.2
52.5
52.5
5.8
49.7
49.7
6.4
46.4
46.4
7.0
55.4
4.4
58.1
54.2
4.9
55.3
52.9
5.3
52.4
51.6
5.8
49.7
49.7
6.4
46.4
46.4
7.0
47.1
4.5
61.9
45.8
5.0
58.7
44.5
5.5
55.4
43.2
6.0
51.8
41.8
6.6
47.9
40.2
7.2
36.8
4.6
67.4
35.6
5.0
64.1
34.4
5.5
60.2
33.0
6.1
57.0
31.7
6.6
52.2
29.7
7.2
TC
SHC
kW
TC
SHC
kW
95
TC
SHC
kW
105
TC
SHC
kW
115
125
TC
SHC
kW
LEGEND
Bypass Factor
sensible capacity (Btuh)
1.10 x cfm
BF
—
t
= t
ꢀ
ldb
edb
Ewb
kW
SHC
TC
—
—
—
—
—
—
Entering Wet-Bulb
Total Unit Power Input
t
= Wet-bulb temperature corresponding to enthalpy of air leaving
lwb
Sensible Heat Capacity (1000 Btuh)
Cooling Capacity (1000 Btuh)
Electronic Computated Motor
evaporator coil (h
)
lwb
total capacity (Btuh)
4.5 x cfm
ECM
*
h
= h
ꢀ
lwb
ewb
TVA Conditions (75°F Entering Dry Bulb)
Where:
h
= Enthalpy of air entering evaporator coil
ewb
NOTES:
1. Ratings are net; they do account for the effects
of the evaporator-fan motor power and heat.
2. Direct interpolation is permissible. Do not extrapolate.
3. The following formulas may be used:
4. The SHC is based on 80°F Edb (Entering dry bulb) air temperature
through Evaporator coil. Below 80°F Edb, subtract (Correction Factor x
CFM) from SHC. Above 80°F Edb, add (Correction Factor x CFM) to
SHC. Correction Factor = 1.10 x (1 – BF) x (Edb – 8)
13
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Performance data (cont)
ECONOMIZER 1-in. FILTER PRESSURE DROP (in. wg)
UNIT50XP
024-036
PRESSURE DROP
0.20
0.25
042-060
MULTIPLICATION FACTORS
HEATER kW
RATING
VOLTAGE
DISTRIBUTION
MULTIPLICATION
FACTOR
200
208
230
240
.69
.75
.92
1.00
240
Example: 15.0 kW (at 240v) heater on 208 v
= 15.0 (.75 mult factor)
= 11.25 capacity at 208 v
FILTER PRESSURE DROP (In. wg)
CFM
FILTER SIZE
500
600
700
800
900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
20 X 20 X 1
20 X 24 X 1
24 X 30 X 1
0.05 0.07 0.08 0.10 0.12 0.13 0.14 0.15
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.09 0.10 0.11 0.13 0.14 0.15 0.16
—
—
—
0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18
ELECTRIC HEAT PRESSURE DROP TABLES
Small Cabinet: 024-036
CFM
STATIC
500
0.00
0.00
0.00
0.00
600
0.00
0.00
0.00
0.00
700
800
0.00
0.00
0.00
0.02
900
0.00
0.00
0.00
0.04
1000
0.00
0.00
0.02
0.06
1100
0.00
0.02
0.04
0.08
1200
0.00
0.03
0.06
0.10
1300
0.02
0.05
0.07
0.12
1400
0.04
0.07
0.09
0.14
1500
0.06
0.08
0.10
0.16
1600
0.07
0.09
0.11
0.18
5 kW
0.00
0.00
0.00
0.00
7.5 kW
10 kW
15 kW
Large Cabinet: 042-060
CFM
STATIC
1100
0.00
1200
1300
1400
1500
0.02
0.03
0.03
0.05
0.06
1600
0.03
0.04
0.04
0.06
0.07
1700
0.04
0.05
0.05
0.07
0.08
1800
0.05
0.06
0.06
0.08
0.09
1900
0.06
0.07
0.07
0.09
0.10
2000
0.07
0.08
0.08
0.10
0.11
2100
2200
2300
0.10
0.11
0.11
0.13
0.14
2400
2500
0.12
0.13
0.13
0.15
0.16
5 kW
0.00
0.00
0.00
0.02
0.03
0.00
0.01
0.01
0.03
0.04
0.01
0.02
0.02
0.04
0.05
0.08
0.09
0.09
0.11
0.12
0.09
0.10
0.10
0.12
0.13
0.11
0.12
0.12
0.14
0.15
7.5 kW
10 kW
15 kW
20 kW
0.00
0.00
0.00
0.02
14
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50XP ECM DRY COIL AIRFLOW–SMALL CABINET
CFM ADJUST
PIN SELECT
LO PIN
NOM PIN
HI PIN
UNIT
SIZE
EXTERNAL STATIC
PRESSURE RANGE
0.0–0.39
800
0.4–0.69
725
0.7–1.0
—
0.0–0.39
885
0.4–0.69
805
0.7–1.0
0.0–0.39
0.4–0.69
0.7–1.0
COOLING
730
645
990
795
930
775
855
745
024
030
036
COOLING
DEHUMIDIFY
715
670
—
715
695
COOLING
1010
890
920
825
795
970
910
1105
890
1030
865
930
825
1255
1010
1400
1125
1160
980
1050
925
COOLING
DEHUMIDIFY
845
COOLING
1115
940
1355
1110
1280
1085
1110
990
1025
960
1235
990
1175
975
COOLING
DEHUMIDIFY
50XP ECM DRY COIL AIRFLOW–LARGE CABINET
CFM ADJUST
PIN SELECT
LO PIN
NOM PIN
HI PIN
UNIT
SIZE
042
048
060
EXTERNAL STATIC
PRESSURE RANGE
0.1–1.0
1100
980
0.1–1.0
1225
980
0.1–1.0
1410
1125
1610
1290
2010
1610
COOLING
COOLING
DEHUMIDIFY
COOLING
1260
1120
1575
1400
1400
1120
1750
1400
COOLING
DEHUMIDIFY
COOLING
COOLING
DEHUMIDIFY
50XP ECM WET COIL PRESSURE DROP
STANDARD CFM
UNIT
SIZE
600
0.005
—
700
800
900
1000
1100
1200
1300
1400
—
1500
—
1600
—
1700
—
1800
—
1900
—
2000
2100
—
024
030
036
042
048
060
0.007 0.010 0.012 0.015
—
—
—
—
—
—
—
0.007 0.010 0.012 0.015 0.018 0.021 0.024
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.019 0.023 0.027 0.032 0.037 0.042 0.047
—
—
—
—
—
—
—
—
—
0.014 0.017 0.020 0.024 0.027 0.031 0.035 0.039 0.043
—
—
—
—
—
—
—
0.027 0.032 0.036 0.041 0.046 0.052 0.057 0.063 0.068
—
—
—
—
—
0.029 0.032 0.036 0.040 0.045 0.049 0.053
15
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Typical piping and wiring
ROOF-MOUNTING
CURB
ROOF
RETURN-AIR
FLEXIBLE DUCT
SUPPLY-AIR
FLEXIBLE DUCT
CEILING
CONCENTRIC DIFFUSER BOX
(FIELD-SUPPLIED)
C00023
INDOOR
THERMOSTAT
RETURN
AIR
FROM
POWER
SOURCE
TOP COVER
DISCONNECT
PER NEC*
*NEC - NATIONAL ELECTRICAL CODE
C00063
16
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Application data
Condensate trap — A 2-in. condensate trap must be field
supplied.
openings. Remove the inserts similar to removing an
electrical knock-out. Leave on duct covers to seal the
horizontal discharge openings in the unit. Units installed in
horizontal discharge orientation do not require duct covers.
1” MIN.
TRAP
OUTLET
Maximum cooling airflow — To minimize the possibility
of condensate blow-off from the evaporator, airflow through
the units should not exceed 450 cfm/ton.
2” MIN.
Minimum cooling airflow — The minimum airflow is 350
cfm/ton for standard cooling modes. Airflow can be lower in
certain modes when humidity removal is an issue.
Minimum cooling operating outdoor air temperature —
All standard units have a minimum outdoor operating
temperature of 55°F. With accessory low ambient temperature
kit, units can operate at temperatures down to 0°F.
Ductwork — Secure downflow discharge ductwork to roof
curb. For horizontal discharge applications, attach ductwork
to unit with flanges.
To convert a unit to downflow discharge — Units are
equipped with factory-installed inserts in the downflow
Maximum cooling operating outdoor air temperature —
Maximum outdoor operating air temperature is 125°F.
17
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Electrical data
UNIT
VOLTAGE
RANGE
OUTDOOR INDOOR
FAN MOTOR FAN MOTOR
COMPRESSOR
ELECTRIC HEAT
POWER SUPPLY
MAX FUSE
UNIT MCA or CKT. BKR.
SIZE
50XP
V-PH-Hz
Min
Max
RLA
LRA
FLA
FLA
Nominal kW*
—/—
3.8/5
FLA
—/—
MOCP
—
—
22.0/22.0
27.9/31.4
37.9/42.9
50.5/57.5
25.0/25.0
27.9/31.4
37.9/42.9
50.5/57.5
28.7/28.7
31.1/34.5
41.0/46.0
53.6/60.6
76.2/86.6
22.9/22.9
22.9/23.5
34.6/38.6
47.6/53.6
35.6/35.6
35.6/35.6
41.0/46.0
53.6/60.6
76.2/86.6
98.8/112.7
26.9/26.9
26.9/26.9
34.6/38.6
47.6/53.6
60.5/68.5
35.0/35.0
35.0/35.0
41.0/46.0
53.6/60.6
76.2/86.6
98.8/112.7
26.8/26.8
26.8/26.8
34.6/38.6
47.6/53.6
60.5/68.5
44.5/44.5
44.5/44.5
44.5/48.9
56.5/63.5
79.1/89.5
30/30
30/35
40/45
60/60
30/30
30/35
40/45
60/60
35/35
35/40
45/50
—
18.1/20.8
26/30
024 208/230-1-60
030 208/230-1-60
187
253
13.5
61.0
0.8
4.3
5.4/7.2
7.5/10
—/—
—
—
—
—
36.1/41.7
—/—
3.8/5
18.1/20.8
26/30
187
187
187
253
253
253
15.9
16.9
12.2
73.0
83.0
77.0
0.8
0.8
0.8
4.3
6.8
6.8
5.4/7.2
7.5/10
—/—
—
—
—
—
36.1/41.7
—/—
3.8/5
18.1/20.8
26/30
208/230-1-60
5.4/7.2
7.5/10
11.3/15
—/—
—
36.1/41.7
54.2/62.5
—/—
60/70
80/90
—
036
—
30/30
30/30
40/40
50/60
45/45
45/45
45/50
—
5
10
10.4/12
20.8/24.1
31.3/36.1
—/—
—
—
208/230-3-60
15
—/—
3.8/5
—
—
18.1/20.8
26/30
—
—
5.4/7.2
7.5/10
11.3/15
15/20
—/—
208/230-1-60
187
187
187
187
187
187
253
253
253
253
253
253
22.4
15.4
21.3
14.7
27.0
19.2
105.0
88.0
0.8
0.8
1.6
1.6
1.6
1.6
6.8
6.8
6.8
6.8
9.1
9.1
36.1/41.7
54.2/62.5
72.2/83.3
—/—
60/70
80/90
100/125
—
—
—
042
35/35
35/35
40/40
50/60
—
45/45
45/45
45/50
—
3.8/5
10.4/12
20.8/24.1
31.3/36.1
41.6/48
—/—
—
—
208/230-3-60
7.5/10
11.3/15
15/19.94
—/—
—
70/70
—
—
3.8/5
18.1/20.8
26/30
5.4/7.2
7.5/10
11.3/15
15/20
—/—
—
208/230-1-60
109.0
91.0
36.1/41.7
54.2/62.5
72.2/83.3
—/—
60/70
80/90
100/125
—
—
—
048
35/35
35/35
40/40
50/60
—
60/60
60/60
60/60
—
3.8/5
10.4/12
20.8/24.1
31.3/36.1
41.6/48
—/—
—
—
208/230-3-60
7.5/10
11.3/15
15/19.94
—/—
—
70/70
—
—
3.8/5
18.1/20.8
26/30
5.4/7.2
7.5/10
11.3/15
15/20
—/—
—
208/230-1-60
145.0
137.0
36.1/41.7
54.2/62.5
60/70
80/90
100/125
—
—
—
060
72.2/83.3 101.6/115.5
—/—
34.7/34.7
34.7/34.7
37.4/41.4
50.5/56.5
63.3/71.3
40/40
40/40
45/45
60/60
—
3.8/5
10.4/12
20.8/24.1
31.3/36.1
41.6/48
—
—
208/230-3-60
7.5/10
11.3/15
15/19.94
—
70/80
See Legend and Notes on p. 19
18
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EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
LEGEND
FLA
LRA
MCA
— Full Load Amps
— Locked Rotor Amps
— Minimum Circuit Amps
452 + 464 + 455
®
Average Voltage =
3
1371
3
MOCP — Maximum Overcurrent Protection
RLA
— Rated Load Amps
=
*Heater capacity (KW) based on heater voltage of 208v, 240v, & 480v.
If power distribution voltage to unit varies from rated heater voltage,
heater KW will vary accordingly.
= 457
Determine maximum deviation from average voltage.
(AB) 457 452 = 5 v
NOTES:
(BC) 464 457 = 7 v
(AC) 457 455 = 2 v
1. In compliance with NEC (National Electrical Code) requirements
for multimotor and combination load equipment (refer to NEC
Articles 430 and 440), the overcurrent protective device for the
unit shall be Power Supply fuse. The CGA (Canadian Gas
Association) units may be fuse or circuit breaker.
2. Minimum wire size is based on 60 C copper wire. If other than
60 C wire is used, or if length exceeds wire length in table,
determine size from NEC.
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
7
457
% Voltage Imbalance = 100 x
= 1.53%
3. Unbalanced 3-Phase Supply Voltage
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
Never operate a motor where a phase imbalance in supply volt-
age is greater than 2%. Use the following formula to determine
the percentage of voltage imbalance.
IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact your local electric utility company
immediately.
% Voltage imbalance
max voltage deviation from average voltage
= 100 x
average voltage
19
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Typical wiring schematic— 208/230-1-60
20
C01037
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Typical wiring schematic— 208/230-3-60
C03026
21
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Controls
Heating — If accessory electric heaters are installed, on a
call for heat, circuit R-W is made through the thermostat
contacts. Circuit R-G is made which energizes the IFM. If
the heaters are staged, then the thermostat closes a second set
of contacts (W2) when second stage is required. When
thermostat is satisfied, contacts open, deenergizing the
heater relay. After a preselected delay, the IFM shuts off. If
the thermostat fan selector switch is in the “ON” position,
the IFM will run continuously at speed selected on Easy
Select™ Board.
Operating sequence
Cooling — When the system thermostat calls for cooling, 24
V is supplied to the “Y” and “G” terminals of the thermostat.
This completes the circuit to the contactor coil (C) and
indoor (evaporator) fan time delay relay (TDR). The
normally open contacts of C close and complete the circuit
to compressor motor (COMP) and to outdoor (condenser)
fan motor (OFM). Both motors start instantly. The IFM starts
according to the selection pin set-up on the Easy Select™
Board.
On the loss of the thermostat call for cooling, 24 v is
removed from both the “Y” and “G” terminals (provided the
fan switch is in the “AUTO” position) deenergizing the
compressor contactor and opening the contacts supplying
power to compressor/OFM. After preselected delay, the IFM
shuts off. If the thermostat fan selector switch is in the “ON”
position, the IFM will run continuously at speed selected on
Easy Select™ Board.
NOTE: On units with a Time Guard® II device: once the
compressor has started and then stopped, it cannot be
restarted again until 5 minutes have elapsed.
The indoor blower operation with a call for fan operation (G)
in cooling mode will perform by the on/off delay profile
selected at start up on the Easy Select™ Board.
22
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Guide specifications
Packaged Electric Cooling Units
Constant Volume Application
5. Unit shall have a field-supplied condensate trap.
C. Fans:
1. The evaporator fan shall be direct-drive variable
speed motor and control, as shown on equipment
drawings.
HVAC Guide Specifications
Size Range: 2 to 5 Tons, Nominal Cooling
Carrier Model Number: 50XP
2. Fan wheel shall be made from steel, and shall be
double-inlet type with forward curved blades with
corrosion resistant finish. Fan wheel shall be dy-
namically balanced.
3. Condenser fan shall be direct drive propeller type
with aluminum blades riveted to corrosion resistant
steel spiders, be dynamically balanced, and dis-
charge air vertically.
Part 1—General
SYSTEM DESCRIPTION
Outdoor rooftop or ground mounted, electric cooling
unit utilizing a hermetic compressor for cooling duty
and optional electric heating. Unit shall discharge sup-
ply air vertically or horizontally as shown on contract
drawings. Condenser fan/coil section shall have a
draw-thru design with vertical discharge for minimum
sound levels.
D. Compressor:
1. Fully hermetic compressors with factory-installed
vibration isolation.
2. Scroll compressors shall be standard on all units.
E. Coils:
Evaporator and condenser coils shall have aluminum
plate fins mechanically bonded to seamless copper
tubes with all joints brazed. (Copper/copper and vinyl-
coated construction available as option.) Tube sheet
openings shall be belled to prevent tube wear.
F. Refrigerant Metering Device:
QUALITY ASSURANCE
A. Unit shall be rated in accordance with ARI Standards
210/240-94 and 270-95.
B. Unit shall be designed in accordance with UL Standard
1995.
C. Unit shall be manufactured in a facility registered to
ISO 9001 manufacturing quality standard.
D. Unit shall be UL listed and c-UL certified as a total
package for safety requirements.
E. Roof curb shall be designed to conform to NRCA Stan-
dards.
Refrigerant metering device shall be of the TXV type.
G. Filters:
F. Insulation and adhesives shall meet NFPA 90A re-
quirements for flame spread and smoke generation.
G. Cabinet insulation shall meet ASHRAE Standard 62P.
DELIVERY, STORAGE AND HANDLING
Unit shall be stored and handled per manufacturer’s
recommendations.
Filter section shall consist of field-installed, throw-
away, 1-in. thick fiberglass filters of commercially
available sizes.
H. Controls and Safeties:
1. Unit controls shall be complete with a self-con-
tained low voltage control circuit.
2. Units shall incorporate an internal compressor pro-
tector that provides reset capability.
3. Unit shall provide High and Low/Loss-of-Charge
Pressure Safety Protection.
I. Operating Characteristics:
Part 2 — Products
EQUIPMENT
A. General:
Factory-assembled, single-piece, cooling unit. Con-
tained within the enclosure shall be all factory wiring,
piping, controls, refrigerant charge (R-410A), and spe-
cial features required prior to field start-up.
B. Unit Cabinet:
1. Unit shall be capable of starting and running at
125°F ambient outdoor temperature, exceeding
maximum load criteria of ARI Standard 210.
2. Compressor with standard controls shall be capable of
operation down to 55° F ambient outdoor temperature.
3. Indoor Fan on/off delay profile is selected (for cool-
ing) on the Easy Select™ Board.
1. Unit cabinet shall be constructed of phosphated,
zinc-coated, pre-painted steel capable of withstand-
ing 500 hours of salt spray.
2. Normal service shall be through a single removable
cabinet panel.
3. The unit shall be constructed on a rust proof base-
pan that has an externally trapped, integrated sloped
drain pan.
4. Evaporator fan compartment top surface shall be in-
sulated with a minimum 1/2-in. thick, flexible fiber-
glass insulation, coated on the air side and retained
by adhesive and mechanical means. The evaporator
wall sections will be insulated with a minimum
semi-rigid foil-faced board capable of being wiped
clean. Aluminum foil-faced fiberglass insulation
shall be used in the entire indoor air cavity section.
J. Electrical Requirements:
All unit power wiring shall enter the unit cabinet at a
single location.
K. Motors:
1. Compressor motors shall be of the refrigerant-
cooled type with line-break thermal and current
overload protection.
2. All fan motors shall have permanently lubricated
bearings, and inherent, automatic reset, thermal
overload protection.
3. Condenser fan motor shall be totally enclosed.
23
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Guide specifications (cont)
L. Grille
7. Filter Rack Kit:
Shall provide filter mounting for downflow or hori-
zontal applications.
8. Square-To-Round Duct Transitions (024-048):
Shall have the ability to convert the supply and re-
turn openings from rectangular to round. (024-048
only)
9. Compressor Protection (Time Guard® II Kit)
Solid-state control shall protect compressor by pre-
venting “short cycling.”
1. Louvered Grille:
Louvered grille shall be standard on all units.
M. Special Features Available
1. Coil Options:
Shall include factory-installed optional tin-plated
indoor, copper/copper and vinyl-coated refriger-
ant coils.
2. Economizer:
a. Economizer controls capable of providing free
cooling using outside air.
10. Crankcase Heater:
b. Equipped with low leakage dampers not to ex-
ceed 3% leakage, at 1.0 in. wg pressure differen-
tial.
Shall provide anti-floodback protection for low-
load cooling applications.
11. Electric heaters:
c. Spring return motor shuts off outdoor damper on
power failure.
3. Flat Roof Curb:
a. Electric heater shall be available as a field-
installed option.
b. Heater elements shall be open wire type, ade-
quately supported and insulated with ceramic
bushings.
Curbs shall have seal strip and a wood nailer for
flashing and shall be installed per manufacturer’s
instructions.
c. Electric heater packages must provide single
point power connection capability.
12. Compressor Hard start kit:
4. Manual Outdoor Air Damper:
Package shall consist of damper, birdscreen, and
rainhood which can be preset to admit outdoor air
for year-round ventilation.
Shall be available to give a boost to the compressor
motor at each start-up. (Single Phase only).
5. Thermostat:
To provide for one-stage heating and cooling in ad-
dition manual or automatic changeover and indoor
fan control.
6. Low Ambient Package:
Shall consist of a solid-state control and condenser
coil temperature sensor for controlling condenser-
fan motor operation, which shall allow unit to oper-
ate down to 0° F outdoor ambient temperature.
Copyright 2005 Carrier Corp. • 7310 W. Morris St. • Indianapolis, IN 46231
Printed in U.S.A.
edition date: 10/05
Manufacturer reserves the right to change, at any time, specifications or designs without notice and obligations
Catalog No: 50XP-4PD
Replaces: 50XP-3PD
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