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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
UNIT 50XP
Refrigerant
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,
environmentally sound performance.
IdealHumidity™ Technology
featuring Thermidistat control and
Variable Speed Blower motor
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.
is Carrier’s unique
that
Easy Installation
Factory-assembled package is a
compact, fully self-contained, electric
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cooling unit that is pre-wired, prepiped, and pre-charged for minimum
installation expense. 50XP units are
available in a variety of standard
cooling sizes with voltage options to
meet residential and light commercial
requirements. Units are light weight,
and install easily on a rooftop or at
ground-level. The hightech, composite
base pan eliminates rust problems
associated with ground level
applications.
Durable, dependable
components
Scroll Compressors are designed for
50XP
high efficiency. Each compressor is
hermetically sealed against
contamination to help promote longer
life and dependable operation.
Vibration isolation provides quiet
operation. Compressors have internal
high-pressure and overcurrent
protection.
Convertible duct configuration
Unit is designed for easy use in either
downflow or horizontal applications.
Each unit is easily converted from
horizontal to downflow.
Direct-drive variable speed blower
motor
is standard on all 50XP models.
Direct-drive, PSC condenser-fan
motors
energy consumption and provide for
cooling operation down to 55°F outdoor
temperature. Motormaster® II low
ambient kit is available as a fieldinstalled accessory.
Corporate thermostats include the
Time Guard® II anti-short cycle
protection circuitry. If a non-Corporate
thermostat without anti-short cycle
are designed to help reduce
protection, is used the Time Guard II
field installed anti-short cycle kit is
recommended.
Refrigerant system is designed to
provide dependability. Liquid refrigerant
filter driers are used to promote clean,
unrestricted operation. Each unit leaves
the factory with a full Puron® refrigerant
charge. Refrigerant service connections
are standard on the suction and discharge
lines for checking operating pressures.
Thermostatic Expansion Valve – A
hard shutoff, balance port TXV
maintains a constant superheat at the
evaporator exit (cooling cycle) resulting
in higher overall system efficiency.
Evaporator and condenser coils are
computer-designed for optimum heat
transfer and cooling efficiency. The
evaporator coil is fabricated from
copper tube and aluminum fins and is
located inside the unit for protection
against damage. The condenser coil is
internally mounted on the top tier of the
unit. Copper fin coils and pre-coated fin
coils are available from the factory by
special order. These coils are
recommended in applications where
aluminum fins are likely to be damaged
due to corrosion. They are ideal for
seacoast applications.
High and Low Pressure Switches give
added safety and reliability to the
compressor.
Low sound ratings ensure a quiet
indoor and outdoor environment with
sound ratings as low as 72 dB.
(See page 3.)
Easy to service cabinets provide easy
single-panel accessibility to serviceable
components during maintenance and
installation. The basepan with
integrated drain pan provides easy
ground level installation with or without
a mounting pad. Convenient handholds
are provided to manipulate the unit on
the jobsite. A nesting feature ensures a
positive basepan to roof curb seal when
the unit is roof mounted. A convenient
3/4-in. wide perimeter flange makes
frame mounting on a rooftop easy.
Louvered Grille provides hail and
vandalism protection for the coil.
Downflow operation is easily provided
in the field to allow vertical ductwork
connections. The basepan utilizes
knockout style seals on the bottom
openings to ensure a positive seal in the
horizontal airflow mode.
Cabinets are constructed of heavy-
duty, phosphated, zinc-coated
prepainted steel capable of
withstanding 500 hours of salt spray.
Interior surfaces of the evaporator and
electric heater compartments are
insulated with cleanable semi-rigid
insulation board, which keeps the
conditioned air from being affected by
the outdoor ambient temperature and
provides improved indoor air quality.
(Conforms to American Society of
Heating, Refrigeration and Air
Conditioning Engineers No. 62P.) The
sloped drain pan minimizes standing
water in the drain, which is provided
with an external drain.
Standard metal duct covers with
insulation come with the unit and cover
the horizontal duct openings. These can
be left in place if the unit is converted to
downflow.
Table of contents
Page
Features/Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,2
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
ARI Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Options and Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,6
Base Unit Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,8
Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-15
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Electrical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18, 19
Typical Wiring Schematics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20, 21
Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23, 24
2
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AD
BT
XT
CC
AC
CC
CU
TP
TV
TC
AL
CU
5
Model number nomenclature
— Aluminum
— Copper
Model Number
50XP – Single
Packaged-Electric
Cooling
Nominal Cooling Capacity
024 – 2 ton
030 – 2.5 ton
036 – 3 ton
042 – 3.5 ton
048 – 4 ton
060 – 5 ton
V-Ph-Hz
3 – 208/230-1-60
– 208/230-3-60
50XP 024 3
—
Options
BT – AL evap, vinyl condens
– AL evap, CU condens
Options
– CU evap & condens
(None) – Wire Grille
– Base unit with tin plated indoor coil
– Louvered Grille
hairpins
– Wire Grille and Vinyl-Coated Condenser
– TP with vinyl coating on outdoor coil
Coil Fin
– TP with AL indoor coil & CU/CU out-
– Louvered Grille and Vinyl-Coated Con-
door coil
denser Coil Fin
– Wire Grille, AL Evaporator and CU/CU
Only used if ordering an option
Condenser Coil
– Louvered Grille, AL Evaporator and CU/
CU con
50XP
ARI* capacities
COOLING CAPACITIES AND EFFICIENCIES
UNIT
50XP
024 2 800 24,000 11.0 13.0 72
030 2-1/2 1000 28,800 11.0 13.0 72
036 3 1100 36,000 11.0 13.0 72
042 3-1/2 1400 41,000 11.0 13.0 72
048 4 1450 45,000 11.0 13.0 78
060 5 1710 57,000 11.0 13.0 78
LEGEND
dB — Sound Levels (decibels)
db — Dry Bulb
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.
NOMINAL
TONS
STANDARD
CFM
NET COOLING
CAPACITIES
(Btuh)
‡ Tested in accordance with ARI Standard 270-95 (not listed in ARI).
NOTES:
1. Ratings are net values, reflecting the effects of circulating fan heat.
Ratings are based on:
Cooling Standard: 80°F db, 67°F wb indoor entering-air temperature and 95°F db outdoor entering-air temperature.
2. Before purchasing this appliance, read important energy cost and
efficiency information available from your retailer.
EER@A** SEER†
SOUND
RATINGS‡
(dB)
3
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OUTDOOR SOUND: OCTAVE BAND DATA—DECIBELS (Lw(A))
MODEL NO. 50XP
Frequency (Hz) 024 030 036 042 048 060
125
250
500
1000
2000
4000
8000
Physical data
50XP
50XP
58.8 58.8 60.7 56.7 62.4 63.5
63.5 63.5 63.3 62.8 69.9 67.6
67.2 67.2 66.8 67.8 71.3 71.8
66.9 66.9 66.5 67.4 73.4 75.5
63.7 63.7 64.2 63.7 70.0 71.0
58.3 58.3 60.3 57.7 66.3 68.1
50.0 50.0 53.0 50.8 60.1 59.9
UNIT SIZE 50XP 024 030 036 042 048 060
NOMINAL CAPACITY (ton)
OPERATING WEIGHT (lb)
COMPRESSOR
2 2-1/2 3 3-1/2 4 5
343 343 366 433 456 492
Scroll
REFRIGERANT (R-410A)
Quantity (lb)
7.3 8.0 9.5 10.7 11.25 13.2
REFRIGERANT METERING DEVICE
(Indoor)
CONDENSER COIL
Rows—Fins/in.
Face Area (sq ft)
CONDENSER FAN
Nominal Cfm
Diameter (in.)
Motor Hp (Rpm)
EVAPORATOR COIL
Rows—Fins/in.
Face Area (sq ft)
EVAPORATOR BLOWER
Nominal Airflow (Cfm)
Size (in.)
Motor (Hp)
HIGH-PRESSURE SWITCH (psig)
Cutout
Reset (Auto.)
TXV TXV TXV TXV TXV TXV
2—21
11.95
2350
22
1/8 (825)
3—15
3.7
800
10 x 10
1/2
2—21
12.0
2700
22
1/8 (825)
3—15
3.7
1000
10 x 10
1/2
2—21
13.6
2350
22
1/8 (825)
4—15
3.7
1100
11 x 10
3/4
610 ± 15
420 ± 25
LOSS-OF-CHARGE/LOW-PRESSURE
SWITCH
(Liquid Line) (psig)
Cutout
20 ± 5
45 ± 10
Reset (Auto.)
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.
2—21
15.4
2800
22
1/8 (825)
3—15
4.7
1400
11 x 10
3/4
2—21
17.4
3300
22
1/4 (1100)
4—15
4.7
1400
11 x 10
3/4
2—21
19.3
3300
22
1/4 (1100)
4—17
5.7
1750
11 x 10
1.0
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Options and accessories
Factory-installed options
Coil options
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).
Field-installed accessories
Economizer with Solid-State Controls and Barometric
Relief Dampers
Manual Air Damper (25% open)
Electric Heaters
Filter Rack
Flat Roof Curbs (8-in. and 14-in.)
Square-to-Round Duct Transition Kit
Thermidistat™
Thermostats
Crankcase Heater
Rigging Kit
Low Ambient Kit (Motormaster® II Control)
Solid-State Time Guard® II Device
Lifting Kit
Compressor Hard Start Kit
Economizer with solid-state controls and barometric
relief dampers
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
include Tin-Plated* indoor hairpins, copper/
includes filter racks and provide outdoor air
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.
Thermostats provide control for the system heating and
cooling functions. Thermostat models are available in both
programmable and non-programmable versions.
Lifting kit, including 4 metal brackets that are available to
assist in lifting this product onto a roof application.
Crankcase heater provides anti-floodback protection for
low-load cooling applications.
Low-ambient kit (Motormaster II control) allows the
use of mechanical cooling down to outdoor temperatures as
low as 0°F.
Solid-state Time Guard II device provides short-cycling
protection for the compressor. Not required with corporate
electronic thermostats.
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.
50XP
ELECTRIC HEATERS
ODS CATALOG
ORDERING NO.
CPHEATER052A00
CPHEATER069A00
CPHEATER065A00
CPHEATER051A00
CPHEATER053A00
CPHEATER055A00
CPHEATER056A00
CPHEATER057A00
CPHEATER059A00
LEGEND
ODS — Order Distribution System
NOTE: Electric heaters are rated at 240 v. Refer to Multiplication Factors table for other voltages.
NOMINAL CAPACITY
(kW)
5.0 XXXXXX
7.5 XXXXXX
10.0 X X X X X X
15.0 X X X X X
20.0 XXX
5.0 XXXXX
10.0 X X X X X
15.0 X X X X
20.0 XXX
024 030 036 042 048 060
ELECTRIC HEATERS (208/230 — SINGLE PHASE — 60 Hz)
ELECTRIC HEATERS (208/230 — 3 PHASE — 60 Hz)
USED WITH SIZES
MINIMUM AIRFLOW FOR RELIABLE ELECTRIC HEATER OPERATION
UNIT 024 030 036 042 048 060
AIRFLOW
750 750 1250 1205 1500 1800
5
Page 6
50XP
50XP
ECONOMIZER
FILTER RACK MANUAL OUTSIDE AIR DAMPER
REPLACEMENT
PANEL
MANUAL OUTSIDE
AIR HOOD
DAMPER
BLADE
6
Page 7
Base unit dimensions—50XP024-036
50XP
UNIT
50XP024 208/230-1-60 343 156 39.02 [991.1] 20 [508] 19.3 [489] 17.6 [447]
50XP030 208/230-1-60 343 156 39.02 [991.1] 20 [508] 19.3 [489] 17.6 [447]
50XP036 208/230-1-60, 208/230-3-60 366 166 41.02 [1041.9] 20 [508] 14 [355.6] 13 [330.2]
50XP 024-036 Dimensions
ELECTRICAL
CHARACTERISTICS
UNIT WEIGHT
lb kg X Y Z
UNIT HEIGHT
in. [mm]
“A”
CENTER OF GRAVITY
in. [mm]
7
Page 8
Base unit dimensions—50XP042-060
50XP
UNIT
50XP042 208/230-1-60, 208/230-3-60 433 197 42.98 [1091.7] 21 [533.4] 20.5 [520.2] 16.6 [421.6]
50XP048 208/230-1-60, 208/230-3-60 456 207 44.98 [1142.5] 19.5 [495.3] 17.6 [447.6] 18.0 [457.2]
50XP060 208/230-1-60, 208/230-3-60 492 223 46.98 [1193.3] 21 [533.4] 20 [508] 17.6 [447.0]
ELECTRICAL
CHARACTERISTICS
UNIT WEIGHT
lb kg X Y Z
UNIT HEIGHT
in. [mm]
“A”
CENTER OF GRAVITY
in. [mm]
50XP 042-060 Dimensions
8
Page 9
Accessory dimensions
UNIT SIZE ODS CATALOG NUMBER
50XP024-036
50XP042-060
CPRFCURB006A00 8 [203] 11 [279] 16-1/2 [419] 28-3/4 [730]
CPRFCURB007A00 14 [356] 11 [279] 16-1/2 [419] 28-3/4 [730]
CPRFCURB008A00 8 [203] 16-3/16 [411] 17-3/8 [441] 40-1/4 [1022]
CPRFCURB009A00 14 [356] 16-3/16 [411] 17-3/8 [441] 40-1/4 [1022]
A
in. [mm]
B
in. [mm]
C
in. [mm]
D
in. [mm]
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
Screw
(NOTE A)
*Gasketing
outer flange
Flashing field
supplied
Roofing material
field supplied
Cant strip
field supplied
base
Gasketing
inner flange*
Wood nailer*
Roofcurb*
Insulation (field
supplied)
Duct work
field supplied
Flashing field
Roofing material
Screw
(NOTE A)
*Gasketing
outer flange
supplied
field supplied
Cant strip
field supplied
HVAC unit
base
Gasketing
inner flange*
Duct work
field supplied
Wood nailer*
Roofcurb*
Insulation (field
supplied)
50XP
Roof
*Provided with roofcurb
Roof Curb for Small Cabinet
Note A: When unit mounting screw is used,
retainer bracket must also be used.
B Typ.
Insulated
deck pan
Return opening
(B X C)
5/16"
44
(1125.5mm)
Supply opening
(B x C)
D
C Typ.
Long
Support
Short
Support
Roof
*Provided with roofcurb
Roof Curb for Large Cabinet
Note A: When unit mounting screw is used,
retainer bracket must also be used.
R/A
A
Gasket around
S/A
duct
Insulated
deck pan
Gasket around
outer edge
C00076
9
Page 10
50XP Corner weights (In Pounds)
12
y
50XP
50XP
43
Small Base Large Base
Model 50XP 024
Corner Weight #1 69 69 74 87 92 99
Corner Weight #2 53 53 57 67 71 77
Corner Weight #3 83 83 88 104 110 119
Corner Weight #4 138 138 147 174 183 198
Total Weight 343 343 366 433 456 492
Selection Procedure
I Determine cooling and heating requirements at design
conditions:
Given:
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
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.
III Select electric heat.
The required heating capacity is 15,000 Btuh (given).
Determine the electric heat capacity in kW.
15,000 Btuh
3414 Btuh/kW
Enter the Electric Heater Packages table for 208/240,
single-phase, 036 unit. The 5-kW heater at 240v most
= 4.4 kW of heat required
030 036 042 048 060
x
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
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:
Wet coil pressure drop 0.032 in. wg
External static pressure 0.200 in. wg
Filter 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.
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.
10
Page 11
Performance data-Standard ECM Indoor Motor
COOLING CAPACITIES
50XP024 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
TC
Temp (F)
Entering
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC 27.9 28.6 30.7 33.6 28.8 29.4 31.6 34.5 29.3 30.0 32.2 35.2
SHC 24.1 20.0 20.6 16.8 26.0 21.2 22.1 17.8 27.0 22.6 23.5 18.7
kW 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.2 2.1 2.1 2.1 2.2
TC 26.9 27.5 29.5 32.3 27.6 28.1 30.2 33.1 28.3 28.7 30.8 33.7
SHC 23.8 19.5 20.3 16.4 25.6 20.8 21.7 17.4 26.5 22.1 23.1 18.3
kW 2.3 2.3 2.4 2.4 2.3 2.4 2.4 2.4 2.4 2.4 2.4 2.4
TC 25.6 26.2 28.2 30.8 26.3 26.8 28.8 31.5 27.0 27.3 29.3 32.0
SHC 23.1 19.1 19.9 16.0 24.7 20.5 21.3 16.9 26.2 21.7 22.6 17.8
kW 2.6 2.6 2.6 2.6 2.6 2.6 2.6 2.6 2.6 2.6 2.6 2.6
TC 24.3 24.7 26.6 29.2 25.1 25.3 27.2 29.7 25.9 25.7 27.5 30.1
SHC 22.4 18.6 19.3 15.4 23.8 19.9 20.8 16.3 24.4 21.1 22.1 17.2
kW 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9
TC 22.8 23.2 24.9 27.3 23.8 23.6 25.3 27.7 24.5 24.0 25.7 28.1
SHC 21.7 18.0 18.8 14.8 22.3 19.3 20.2 15.7 23.7 20.5 21.5 16.6
kW 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2
TC 21.4 21.4 24.9 27.3 23.8 23.6 25.3 27.7 24.5 24.0 25.7 28.1
SHC 20.7 17.3 18.8 14.8 22.3 19.3 20.2 15.7 23.7 20.5 21.5 16.6
kW 3.5 3.5 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2
75
85
95
105
115
125
50XP030 COOLING PERFORMANCE TABLE
Outdoor Air
Condenser
75
85
95
105
115
125
62 63* 67 72 62 63* 67 72 62 63* 67 72
24.0 24.5 26.5 29.1 24.6 25.1 27.1 29.8 25.1 25.5 27.4 30.4
21.9 21.3 18.7 15.4 23.5 22.8 19.8 16.1 25.0 24.2 20.8 16.7
1.7 1.7 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.9
22.9 23.3 25.3 27.9 23.5 23.9 25.8 28.5 23.9 24.3 26.2 28.9
21.4 20.7 18.1 14.9 22.9 22.2 19.2 15.6 24.3 23.6 20.3 16.2
1.9 1.9 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.1 2.1
21.8 22.2 24.0 26.5 22.3 22.6 24.5 27.0 22.7 23.0 24.8 27.4
20.8 20.2 17.6 14.3 22.3 21.6 18.7 15.0 23.6 22.9 19.7 15.6
2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.3 2.3
20.5 20.9 22.6 25.0 21.0 21.3 23.0 25.4 21.6 21.7 23.3 25.7
20.2 19.5 16.9 13.7 21.6 20.9 18.0 14.3 22.5 22.2 19.0 14.9
2.4 2.4 2.4 2.4 2.4 2.4 2.5 2.5 2.5 2.5 2.5 2.5
19.2 19.5 21.1 23.3 19.8 19.9 21.5 23.7 20.7 20.4 21.7 23.6
19.4 18.8 16.3 13.0 20.6 20.2 17.3 13.7 21.5 21.2 18.3 14.1
2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.8 2.8
17.8 18.0 19.4 21.4 18.5 18.5 19.5 21.7 19.0 19.0 19.9 21.9
18.5 18.1 15.5 12.3 19.2 19.2 16.5 12.9 19.8 19.7 17.6 13.5
2.9 2.9 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.1 3.1
62 63* 67 72 62 63* 67 72 62 63* 67 72
See Legend and Notes on page 13.
800/0.026 900/0.032 1000/0.04
875/0.06 1000/0.07 1125/0.08
Evaporator Air—CFM/BF
Evaporator Air — Ewb (F)
Evaporator Air—CFM/BF
Evaporator Air — Ewb (F)
50XP
11
Page 12
Performance data (cont)-Standard ECM Indoor Motor
COOLING CAPACITIES
50XP036 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
TC
75
85
95
50XP
105
115
125
50XP042 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
75
85
95
105
115
125
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC 39.6 40.4 43.4 47.6 40.5 41.2 44.2 48.4 41.5 42.1 45.1 49.4
SHC 33.5 27.6 28.6 23.4 35.4 29.0 30.0 24.3 37.9 30.8 31.9 25.6
kW 3.0 3.0 3.0 3.1 3.0 3.0 3.0 3.1 3.0 3.0 3.0 3.1
TC 37.9 38.7 41.5 45.5 38.7 39.4 42.3 46.3 39.7 40.2 43.2 47.2
SHC 32.8 26.9 27.8 22.7 34.6 28.2 29.2 23.6 37.0 30.0 31.1 24.8
kW 3.3 3.3 3.4 3.4 3.3 3.3 3.4 3.4 3.3 3.3 3.4 3.4
TC 36.2 36.8 39.6 43.4 36.9 37.5 40.3 44.1 37.8 38.2 41.0 44.9
SHC 32.0 26.1 27.0 21.9 33.8 27.4 28.4 22.8 35.9 29.1 30.3 24.0
kW 3.7 3.7 3.7 3.8 3.7 3.7 3.7 3.8 3.7 3.7 3.7 3.8
TC 34.2 34.8 37.4 41.0 34.9 35.4 38.0 41.6 36.0 36.0 38.7 42.3
SHC 31.0 25.2 26.2 21.1 32.7 26.5 27.6 22.0 34.3 28.3 29.4 23.2
kW 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1
TC 32.1 32.6 35.0 38.4 32.8 33.1 35.5 38.9 34.0 33.7 36.1 39.5
SHC 30.0 24.3 25.2 20.2 31.4 25.6 26.6 21.0 32.8 27.3 28.5 22.2
kW 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.6 4.5 4.5 4.5 4.6
TC 29.8 30.1 32.3 35.3 30.6 30.5 32.7 35.7 31.7 31.0 33.2 36.2
SHC 28.6 23.2 24.2 19.1 29.6 24.5 25.5 20.0 30.6 26.1 27.3 21.1
kW
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
33.2 26.7 27.8 22.3 34.7 27.9 29.0 23.1 36.9 29.6 30.9 24.2
2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.8 2.8 2.8 2.8 2.9
34.6 35.1 37.9 41.8 35.3 35.6 38.4 42.4 36.4 36.3 39.1 43.1
32.4 26.0 27.1 21.6 34.0 27.1 28.3 22.4 35.6 28.9 30.2 23.6
2.9 2.9 3.0 3.0 3.0 3.0 3.0 3.0 3.1 3.1 3.1 3.2
33.0 33.4 36.0 39.7 33.7 33.8 36.5 40.2 34.8 34.4 37.0 40.8
31.6 25.3 26.4 20.9 32.9 26.4 27.6 21.7 34.4 28.1 29.4 22.8
3.2 3.2 3.3 3.3 3.3 3.3 3.3 3.4 3.4 3.4 3.4 3.5
31.3 31.5 34.0 37.5 32.1 31.9 34.3 37.9 33.1 32.4 34.9 38.4
30.6 24.5 25.6 20.1 31.5 25.7 26.8 20.9 32.8 27.3 28.6 22.0
3.6 3.6 3.6 3.6 3.6 3.6 3.7 3.7 3.8 3.7 3.8 3.8
29.6 29.4 31.8 35.0 30.4 29.8 32.1 35.4 31.3 30.3 32.6 35.8
29.3 23.7 24.8 19.3 30.0 24.8 26.0 20.0 31.0 26.4 27.7 21.1
4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.1 4.1 4.1 4.2
27.8 27.2 29.4 32.4 28.4 27.5 29.7 32.7 29.3 28.0 30.1 33.0
27.5 22.8 23.9 18.4 28.2 23.8 25.0 19.1 29.0 25.4 26.7 20.2
4.4 4.3 4.4 4.4 4.4 4.4 4.4 4.4 4.5 4.5 4.5 4.5
62 63* 67 72 62 63* 67 72 62 63* 67 72
4.9 4.9 4.9 5.0 4.9 4.9 4.9 5.0 4.9 4.9 4.9 5.0
See Legend and Notes on page 13.
1100/0.06 1225/0.07 1400/0.08
1100/0.06 1225/0.07 1400/0.08
Evaporator Air—CFM/BF
Evaporator Air — Ewb (F)
Evaporator Air—CFM/BF
Evaporator Air — Ewb (F)
12
Page 13
Performance data (cont)-Standard ECM Indoor Motor
COOLING CAPACITIES
50XP048 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
TC
75
85
95
105
115
125
50XP060 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
75
85
95
105
115
125
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
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
39.3 32.0 33.4 27.2 42.6 34.3 35.8 28.9 45.8 36.8 38.4 30.6
3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.5 3.4 3.4 3.4 3.5
42.8 43.6 47.2 52.1 44.3 44.9 48.6 53.5 45.6 46.1 49.9 54.8
38.2 30.9 32.3 26.2 41.3 33.2 34.7 27.7 44.3 35.5 37.3 29.4
3.7 3.7 3.8 3.8 3.7 3.7 3.8 3.8 3.8 3.8 3.8 3.8
40.6 41.3 44.7 49.4 41.8 42.4 46.0 50.7 44.2 43.7 47.0 51.8
36.9 29.8 31.2 25.2 39.9 32.0 33.6 26.7 43.0 34.6 36.1 28.3
4.1 4.1 4.2 4.2 4.1 4.1 4.2 4.2 4.2 4.1 4.2 4.2
38.2 38.9 42.1 46.4 39.6 39.8 43.1 47.6 41.5 40.8 44.0 48.5
35.7 28.7 30.1 24.0 38.3 30.7 32.3 25.5 40.0 33.2 34.8 27.0
4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.7 4.6 4.6 4.6 4.7
35.7 36.3 39.3 43.3 38.2 37.1 40.1 44.2 38.7 37.9 40.8 45.0
34.4 27.5 28.9 22.9 35.7 29.5 31.0 24.3 38.2 31.8 33.5 25.8
5.0 5.0 5.1 5.1 5.1 5.0 5.1 5.1 5.1 5.1 5.1 5.1
33.4 33.4 36.2 39.4 34.6 34.1 36.9 40.5 36.1 34.8 37.5 41.2
32.1 26.2 27.6 21.5 33.8 28.2 29.7 22.9 35.6 30.2 31.9 24.4
5.6 5.6 5.6 5.7 5.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6
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
49.4 47.9 41.6 33.8 53.6 51.8 44.5 35.4 57.6 55.4 47.1 36.8
4.1 4.1 4.2 4.2 4.2 4.3 4.3 4.4 4.4 4.4 4.5 4.6
54.7 55.6 59.7 65.2 56.2 57.0 61.1 66.6 57.4 58.1 61.9 67.4
48.2 46.7 40.4 32.6 52.4 50.5 43.2 34.2 56.3 54.2 45.8 35.6
4.5 4.5 4.6 4.7 4.7 4.7 4.8 4.9 4.8 4.9 5.0 5.0
52.2 53.0 56.9 62.0 53.5 54.3 58.0 63.2 55.0 55.3 58.7 64.1
47.0 45.4 39.2 31.4 51.1 49.2 41.9 32.9 55.0 52.9 44.5 34.4
5.0 5.0 5.1 5.2 5.1 5.2 5.3 5.3 5.2 5.3 5.5 5.5
49.4 50.2 53.8 58.7 50.7 51.4 54.8 59.6 52.5 52.4 55.4 60.2
45.7 44.1 37.9 30.1 49.8 47.9 40.6 31.6 52.5 51.6 43.2 33.0
5.5 5.6 5.6 5.7 5.7 5.7 5.8 5.9 5.8 5.8 6.0 6.1
46.5 47.2 50.5 55.0 48.1 48.3 51.3 56.8 49.7 49.7 51.8 57.0
44.3 42.7 36.4 28.7 48.1 46.6 39.2 30.6 49.7 49.7 41.8 31.7
6.1 6.2 6.2 6.3 6.2 6.3 6.4 6.4 6.4 6.4 6.6 6.6
43.3 43.9 46.7 52.2 45.2 45.1 47.4 52.5 46.4 46.4 47.9 52.2
42.8 41.2 34.9 27.8 45.2 45.1 37.6 28.9 46.4 46.4 40.2 29.7
6.7 6.8 6.8 6.8 6.8 6.9 7.0 7.0 7.0 7.0 7.2 7.2
1260/0.06 1400/0.06 1600/0.08
1500/0.004 1750/0.007 2000/0.01
Evaporator Air—CFM/BF
Evaporator Air — Ewb (F)
Evaporator Air—CFM/BF
Evaporator Air — Ewb (F)
50XP
LEGEND
BF — Bypass Factor
Ewb — Entering Wet-Bulb
kW — Total Unit Power Input
SHC — Sensible Heat Capacity (1000 Btuh)
TC — Cooling Capacity (1000 Btuh)
ECM — Electronic Computated Motor
* — TVA Conditions (75°F Entering Dry Bulb)
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:
t=t
ldb edb
t = Wet-bulb temperature corresponding to enthalpy of air leaving
lwb
evaporator coil (h )
h=h
lwb ewb
Where: h = Enthalpy of air entering evaporator coil
sensible capacity (Btuh)
1.10 x cfm
lwb
total capacity (Btuh)
4.5 x cfm
ewb
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
Page 14
Performance data (cont)
ECONOMIZER 1-in. FILTER PRESSURE DROP (in. wg)
UNIT50XP PRESSURE DROP
024-036 0.20
042-060 0.25
MULTIPLICATION FACTORS
HEATER kW
RATING
240
50XP
Example: 15.0 kW (at 240v) heater on 208 v
= 15.0 (.75 mult factor)
= 11.25 capacity at 208 v
VOLTAGE
DISTRIBUTION
200
208
230
240
MULTIPLICATION
FACTOR
.69
.75
.92
1.00
FILTER PRESSURE DROP (In. wg)
FILTER SIZE
20 X 20 X 1 0.05 0.07 0.08 0.10 0.12 0.13 0.14 0.15 — — — — — — — — — — —
20 X 24 X 1 ————0.09 0.10 0.11 0.13 0.14 0.15 0.16 — — — — — — — —
24 X 30 X 1 ———————0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18
500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
CFM
ELECTRIC HEAT PRESSURE DROP TABLES
Small Cabinet: 024-036
STATIC
5 kW 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07
7.5 kW 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.03 0.05 0.07 0.08 0.09
10 kW 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07 0.09 0.10 0.11
15 kW 0.00 0.00 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18
500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600
CFM
Large Cabinet: 042-060
STATIC
5 kW 0.00 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12
7.5 kW 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13
10 kW 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13
15 kW 0.00 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15
20 kW 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16
1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500
CFM
14
Page 15
UNIT
SIZE
024
030
036
UNIT
SIZE
042
048
060
CFM ADJUST
PIN SELECT
EXTERNAL STATIC
PRESSURE RANGE
COOLING
COOLING
DEHUMIDIFY
COOLING
COOLING
DEHUMIDIFY
COOLING
COOLING
DEHUMIDIFY
CFM ADJUST
PIN SELECT
EXTERNAL STATIC
PRESSURE RANGE
COOLING
COOLING
DEHUMIDIFY
COOLING
COOLING
DEHUMIDIFY
COOLING
COOLING
DEHUMIDIFY
50XP ECM DRY COIL AIRFLOW–SMALL CABINET
LO PIN NOM PIN HI PIN
0.0–0.39 0.4–0.69 0.7–1.0 0.0–0.39 0.4–0.69 0.7–1.0 0.0–0.39 0.4–0.69 0.7–1.0
800 725 — 885 805 730 990 930 855
715 670 — 715 695
1010 920 825 1105 1030 930 1255 1160 1050
890 845 795 890 865
1110 1025 970 1235 1175
990 960 910 990 975
645 795 775 745
825 1010 980 925
1115 1400 1355 1280
940 1125 1110 1085
50XP ECM DRY COIL AIRFLOW–LARGE CABINET
LO PIN NOM PIN HI PIN
0.1–1.0 0.1–1.0 0.1–1.0
1100 1225 1410
980 980 1125
1260 1400 1610
1120 1120 1290
1575 1750 2010
1400 1400 1610
50XP
UNIT
SIZE
024 0.005
030 —
036
042
048
060
600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100
— — — 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
50XP ECM WET COIL PRESSURE DROP
STANDARD CFM
0.007 0.010 0.012 0.015 — — — — — — — — — — —
0.007 0.010 0.012 0.015 0.018 0.021 0.024 — — — — — — — —
15
Page 16
Typical piping and wiring
ROOF-MOUNTING
CURB
ROOF
50XP
50XP
SUPPLY-AIR
FLEXIBLE DUCT
CONCENTRIC DIFFUSER BOX
(FIELD-SUPPLIED)
RETURN
AIR
CEILING
RETURN-AIR
FLEXIBLE DUCT
C00023
INDOOR
THERMOSTAT
16
TOP COVER
FROM
POWER
SOURCE
DISCONNECT
PER NEC*
*NEC - NATIONAL ELECTRICAL CODE
C00063
Page 17
Application data
Condensate trap — A 2-in. condensate trap must be field
supplied.
1” MIN.
TRAP
OUTLET
2” MIN.
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
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.
Maximum cooling airflow — To minimize the possibility
of condensate blow-off from the evaporator, airflow through
the units should not exceed 450 cfm/ton.
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.
Maximum cooling operating outdoor air temperature —
Maximum outdoor operating air temperature is 125°F.
50XP
17
Page 18
Electrical data
UNIT
SIZE
50XP
024 208/230-1-60 187 253 13.5 61.0 0.8 4.3
030 208/230-1-60 187 253 15.9 73.0 0.8 4.3
036
V-PH-Hz
208/230-1-60 187 253 16.9 83.0 0.8 6.8
VO LTAGE
RANGE
Min Max RLA LRA FLA FLA Nominal kW* FLA UNIT MCA
COMPRESSOR
50XP
208/230-3-60 187 253 12.2 77.0 0.8 6.8
208/230-1-60 187 253 22.4 105.0 0.8 6.8
042
208/230-3-60 187 253 15.4 88.0 0.8 6.8
208/230-1-60 187 253 21.3 109.0 1.6 6.8
048
208/230-3-60 187 253 14.7 91.0 1.6 6.8
208/230-1-60 187 253 27.0 145.0 1.6 9.1
060
208/230-3-60 187 253 19.2 137.0 1.6 9.1
See Legend and Notes on p. 19
OUTDOOR
FAN MOTOR
INDOOR
FAN MOTOR ELECTRIC HEAT POWER SUPPLY
—/—
3.8/5
5.4/7.2
7.5/10
—/—
3.8/5
5.4/7.2
7.5/10
—/—
3.8/5
5.4/7.2
7.5/10
11.3/15
—/—
5
10
15
—/—
3.8/5
5.4/7.2
7.5/10
11.3/15
15/20
—/—
3.8/5
7.5/10
11.3/15
15/19.94
—/—
3.8/5
5.4/7.2
7.5/10
11.3/15
15/20
—/—
3.8/5
7.5/10
11.3/15
15/19.94
—/—
3.8/5
5.4/7.2
7.5/10
11.3/15
15/20
—/—
3.8/5
7.5/10
11.3/15
15/19.94
—/—
18.1/20.8
26/30
36.1/41.7
—/—
18.1/20.8
26/30
36.1/41.7
—/—
18.1/20.8
26/30
36.1/41.7
54.2/62.5
—/—
10.4/12
20.8/24.1
31.3/36.1
—/—
18.1/20.8
26/30
36.1/41.7
54.2/62.5
72.2/83.3
—/—
10.4/12
20.8/24.1
31.3/36.1
41.6/48
—/—
18.1/20.8
26/30
36.1/41.7
54.2/62.5
72.2/83.3
—/—
10.4/12
20.8/24.1
31.3/36.1
41.6/48
—/—
18.1/20.8
26/30
36.1/41.7
54.2/62.5
72.2/83.3
—/—
10.4/12
20.8/24.1
31.3/36.1
41.6/48
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
101.6/115.5
34.7/34.7
34.7/34.7
37.4/41.4
50.5/56.5
63.3/71.3
MAX FUSE
or CKT. BKR. MOCP
30/30
30/35
40/45
60/60
30/30
30/35
40/45
60/60
35/35
35/40
45/50
—
—
30/30
30/30
40/40
50/60
45/45
45/45
45/50
—
—
—
35/35
35/35
40/40
50/60
—
45/45
45/45
45/50
—
—
—
35/35
35/35
40/40
50/60
—
60/60
60/60
60/60
—
—
—
40/40
40/40
45/45
60/60
—
—
—
—
—
—
—
—
—
—
—
—
60/70
80/90
—
—
—
—
—
—
—
60/70
80/90
100/125
—
—
—
—
70/70
—
—
—
60/70
80/90
100/125
—
—
—
—
70/70
—
—
—
60/70
80/90
100/125
—
—
—
—
70/80
18
Page 19
LEGEND
FLA — Full Load Amps
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
RLA
*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.
NOTES:
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.
3. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is greater than 2%.
the percentage of voltage imbalance.
% Voltage imbalance
—
= 100 x
Rated
Load Amps
Use the following formula to determine
max voltage deviation from average voltage
average voltage
®
EXAMPLE: Supply voltage is 460-3-60.
Determine maximum deviation from average voltage.
(AB) 457
(BC) 464
(AC) 457
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
% Voltage Imbalance = 100 x
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact your local electric utility company
immediately.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
452=5v
457=7v
455=2v
= 1.53%
457
=
= 457
7
452 + 464 + 455
3
1371
3
50XP
19
Page 20
Typical wiring schematic— 208/230-1-60
50XP
20
C01037
Page 21
Typical wiring schematic— 208/230-3-60
50XP
C03026
21
Page 22
Controls
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
50XP
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.
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.
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
Page 23
Guide specifications
Packaged Electric Cooling Units
Constant Volume Application
HVAC Guide Specifications
Size Range: 2 to 5 Tons, Nominal Cooling
Carrier Model Number: 50XP
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 supply 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.
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.
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.
Part 2 — Products
EQUIPMENT
A. General:
Factory-assembled, single-piece, cooling unit. Contained within the enclosure shall be all factory wiring,
piping, controls, refrigerant charge (R-410A), and special features required prior to field start-up.
B. Unit Cabinet:
1. Unit cabinet shall be constructed of phosphated,
zinc-coated, pre-painted steel capable of withstanding 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 basepan that has an externally trapped, integrated sloped
drain pan.
4. Evaporator fan compartment top surface shall be insulated with a minimum 1/2-in. thick, flexible fiberglass 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.
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.
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 dynamically balanced.
3. Condenser fan shall be direct drive propeller type
with aluminum blades riveted to corrosion resistant
steel spiders, be dynamically balanced, and discharge air vertically.
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 vinylcoated construction available as option.) Tube sheet
openings shall be belled to prevent tube wear.
F. Refrigerant Metering Device:
Refrigerant metering device shall be of the TXV type.
G. Filters:
Filter section shall consist of field-installed, throwaway, 1-in. thick fiberglass filters of commercially
available sizes.
H. Controls and Safeties:
1. Unit controls shall be complete with a self-contained low voltage control circuit.
2. Units shall incorporate an internal compressor protector that provides reset capability.
3. Unit shall provide High and Low/Loss-of-Charge
Pressure Safety Protection.
I. Operating Characteristics:
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 cooling) on the Easy Select™ Board.
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 refrigerantcooled 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.
50XP
23
Page 24
Guide specifications (cont)
L. Grille
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 refrigerant coils.
2. Economizer:
a. Economizer controls capable of providing free
cooling using outside air.
b. Equipped with low leakage dampers not to ex-
ceed 3% leakage, at 1.0 in. wg pressure differential.
c. Spring return motor shuts off outdoor damper on
power failure.
3. Flat Roof Curb:
Curbs shall have seal strip and a wood nailer for
flashing and shall be installed per manufacturer’s
instructions.
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.
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 condenserfan motor operation, which shall allow unit to operate down to 0° F outdoor ambient temperature.
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 return openings from rectangular to round. (024-048
only)
9. Compressor Protection (Time Guard® II Kit)
Solid-state control shall protect compressor by preventing “short cycling.”
10. Crankcase Heater:
Shall provide anti-floodback protection for lowload cooling applications.
11. Electric heaters:
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.
c. Electric heater packages must provide single
point power connection capability.
12. Compressor Hard start kit:
Shall be available to give a boost to the compressor
motor at each start-up. (Single Phase only).
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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