12 SEER straight cool (Puron)
Product
Data
50GL
Single-Package
Electric Cooling
Units
with Puron® (R-410A) Refrigerant
2 to 5 Nominal Tons
Single-Package Products with
Energy-Saving Features and Puron®
refrigerant.
• Low Sound Levels
• 12 SEER
• Variable Speed Blower Option
Features/Benefits
One-piece cooling unit with optional
electric heater, low installation cost,
dependable performance and easy
maintenance.
Efficient operation
UNIT 50GL
High-efficiency design with a SEER
(Seasonal Energy Efficiency Ratio)
of 12.0.
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,
environmentally sound performance.
ComfortHeat™ Technology
featuring Variable Speed Blower
motors provides better comfort and
energy efficiency. You can expect up to
30 times better dehumidification; a
SEER boost of up to 12.7; economical
constant fan for less than $30 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
Copyright 2001 Carrier Corporation
Form 50GL-2PD
cooling unit that is pre-wired, prepiped, and pre-charged for minimum
installation expense. 50GL 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
protection circuitry. If a non-Corporate
thermostat without anti-short cycle
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.
Unit is designed for easy use in either
downflow or horizontal applications.
Each unit is easily converted from
horizontal to downflow.
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.
Direct-drive multi-speed, PSC
(permanent split capacitor) blower
motor is standard on all 50GL models.
High and Low Pressure Switches give
added safety and reliability to the
compressor.
Direct-drive, PSC condenser-fan
motors are designed to help reduce
energy consumption and provide for
cooling operation down to 40°F outdoor
temperature. Motormaster® II low
ambient kit is available as a fieldinstalled accessory.
Low sound ratings ensure a quiet
indoor and outdoor environment with
sound ratings as low as 72 dB.
(See page 3.)
Scroll Compressors are designed for
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
Corporate thermostats include the
Time Guard® II anti-short cycle
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 heavyduty, 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-16
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Electrical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19, 20
Typical Wiring Schematics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21, 24
Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26, 27
2
Model number nomenclature
50GL
024
3
VS
Options
BT – AL evap, vinyl condens
CC – AL evap, CU condens
Options
CU –
– Wire
CU Grille
evap & condens
(None)
AD – Louvered Grille
– Grille
Variable
(VS) Unit
BT VS
– Wire
andspeed
Vinyl-Coated
Condenser
VTCoil
– Fin
VS, AL evap, vinyl condens
VC
–
VS,
AL
evap,
CU
condens
XT – Louvered Grille and Vinyl-Coated ConVU
– VS,
CU
evap & condens
denser
Coil
Fin
used
if ordering
an option
CC Only
– Wire
Grille,
AL Evaporator
and CU/CU
Condenser Coil
AC – Louvered Grille, AL Evaporator and CU/
CU con
Model Number
50GL – 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
AL — Aluminum
CU — Copper
V-Ph-Hz
3 – *208/230-1-60
5 – 208/230-3-60
6 – 460-3-60
*Variable speed units are only available
in 208/230-1-60 (3)
ARI* capacities
COOLING CAPACITIES AND EFFICIENCIES
UNIT
50GL
NOMINAL
TONS
STANDARD
CFM
NET COOLING
CAPACITIES
(Btuh)
SEER†
SOUND
RATINGS‡
(dB)
024
030
036
042
048
060
2
2-1/2
3
3-1/2
4
5
800
1000
1200
1400
1600
1750
24,000
29,000
35,000
41,000
48,000
59,000
12.0
12.0
12.0
12.0
12.0
12.0
72
72
72
73
78
76
LEGEND
dB
— Sound Levels (decibels)
db
— Dry Bulb
SEER — Seasonal Energy Efficiency Ratio
wb
— Wet Bulb
* Air Conditioning & Refrigeration Institute.
† Rated in accordance with U.S. Government DOE Department of
Energy) test procedures and/or ARI Standard 210/240-94.
‡ 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.
50GL WITH ICM FIOP RATINGS
UNIT
50GL
“A”**
CAPACITY
“A”**
EER
SEER
024
030
036
042
048
060
24,000
29,000
35,000
41,000
48,000
59,000
10.7
10.7
10.6
10.7
10.5
10.4
12.7
12.7
12.5
12.5
12.3
12.3
**“A” Capacity- 80°F indoor db/67°F indoor wb & 95°F outdoor db.
3
OUTDOOR SOUND: ONE-THIRD OCTAVE BAND DATA—DECIBELS
UNIT
50GL
Frequency (Hz)
024
030
036
042
048
060
63
44.8
48.0
50.0
49.1
51.4
53.7
125
60.4
58.2
60.4
63.9
65.2
62.6
250
58.3
59.2
61.6
65.2
69.7
65.9
500
64.8
65.8
66.9
67.9
72.7
70.6
1000
66.9
67.7
67.8
66.7
72.9
71.6
2000
64.3
64.8
64.6
63.8
69.8
68.2
4000
59.8
61.8
60.7
60.2
65.8
65.8
8000
51.8
53.6
52.8
50.7
57.9
58.3
Physical data
UNIT SIZE 50GL
024
030
036
042
048
NOMINAL CAPACITY (ton)
2
2-1/2
3
3-1/2
4
5
OPERATING WEIGHT (lb)
270
291
299
321
326
399
9.0
9.5
10.0
COMPRESSOR
060
Scroll
REFRIGERANT (R-410A)
Quantity (lb)
5.0
5.5
6.9
Accurater® Piston
REFRIGERANT METERING DEVICE
Orifice ID (in.)
.057
.057
.065
.070
.073
.086
CONDENSER COIL
Rows—Fins/in.
Face Area (sq ft)
1—17
9.1
1—17
12.7
2—17
9.1
2—17
12.3
2—17
12.3
2—17
16.4
CONDENSER FAN
Nominal Cfm
Diameter (in.)
Motor Hp (Rpm)
2350
22
1/8 (825)
2350
22
1/8 (825)
2350
22
1/8 (825)
2350
22
1/8 (825)
3300
22
1/4 (1100)
3300
22
1/4 (1100)
3—15
3.7
3—15
3.7
3—15
3.7
3—15
4.7
4—15
4.7
4—15
4.7
STANDARD EVAPORATOR BLOWER
Nominal Airflow (Cfm)
Size (in.)
Motor (Hp)
800
10 x 10
1/4
1000
10 x 10
1/4
1200
10 x 10
1/2
1400
11 x 10
3/4
1600
11 x 10
3/4
1750
11 x 10
1.0
EVAPORATOR BLOWER ICM FIOP ONLY
Nominal Airflow (Cfm)
Size (in.)
Motor (Hp)
800
10 x 10
1/2
1000
10 x 10
1/2
1200
10 x 10
3/4
1400
11 x 10
3/4
1600
11 x 10
3/4
1750
11 x 10
1.0
24 x 30 x 1
24 x 30 x 1
24 x 30 x 1
EVAPORATOR COIL
Rows—Fins/in.
Face Area (sq ft)
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
5
2
4
3
UNIT
AR
A
AIR
CO
Y
NING
ITIO
ND
A2
T
IFIED O ARI A
RT
S
C
CE
EQ
RI
YING WITH
PL
OM
MANUFACTUR
ER
* 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.
UIP M E NT
STA
NDARD
21
0
Options and accessories
controls compartment. Heater sizes range from 5.0 to
20.0 kW. The electric heater design allows the use of a
single-point 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.
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 fit into the
hand-holds, a support strap and two safety straps, is
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 shortcycling protection for the compressor. Not required with
corporate electronic thermostats.
Filter rack features easy installation, serviceability, and
high-filtering performance for vertical applications.
Compressor Hard start kit assists compressor start-up
by providing additional starting torque on single phase
units and prolongs compressor motor life.
Factory-installed options
Coil options include 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.
Electronic Variable-Speed Motor — ICM Motors
(Integrated Control Motor) provide variable-speed
operation to optimize comfort levels year round. They are
also more economical to operate than standard motors.
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
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 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
ELECTRIC HEATERS
USED WITH SIZES
024
030
036
042
ELECTRIC HEATERS (208/230 — SINGLE PHASE — 60 Hz)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
ELECTRIC HEATERS (208/230 — 3 PHASE — 60 Hz)
X
X
X
X
X
X
X
X
X
X
ELECTRIC HEATERS (460 V — 3 PHASE — 60 Hz)
X
X
X
X
X
X
X
ODS CATALOG
ORDERING NO.
NOMINAL CAPACITY
(kW)
048
060
CPHEATER052A00
CPHEATER069A00
CPHEATER065A00
CPHEATER051A00
CPHEATER054A00
5.0
7.5
10.0
15.0
20.0
X
X
X
X
X
X
X
X
X
X
CPHEATER055A00
CPHEATER056A00
CPHEATER057A00
CPHEATER059A00
5.0
10.0
15.0
20.0
X
X
X
X
X
X
X
X
CPHEATER060A00
CPHEATER061A00
CPHEATER062A00
CPHEATER063A00
5.0
10.0
15.0
20.0
X
X
X
X
X
X
X
X
LEGEND
ODS — Order Distribution System
NOTE: Electric heaters are rated at 240 v and 480 v. Refer to Multiplication Factors table for other voltages.
MINIMUM AIRFLOW FOR RELIABLE ELECTRIC HEATER OPERATION
UNIT
AIRFLOW
024
750
030
750
036
1250
042
1205
048
1500
060
1800
5
ECONOMIZER
FILTER RACK
MANUAL OUTSIDE AIR DAMPER
REPLACEMENT
PANEL
MANUAL OUTSIDE
AIR HOOD
DAMPER
BLADE
6
Base unit dimensions—50GL024-036
UNIT
ELECTRICAL
CHARACTERISTICS
50GL024
208/230-1-60
lb
kg
UNIT HEIGHT
in. [mm]
“A”
270
122.5
37.02 [940.3]
UNIT WEIGHT
CENTER OF GRAVITY
in. [mm]
X
Y
Z
18.5 [469.9]
14.5 [368.3]
16.0 [406.4]
50GL030
208/230-1-60, 208/230-3-60
291
132.0
39.02 [991.1]
19.5 [495.3]
15.5 [393.7]
17.6 [447.0]
50GL036
208/230-1-60, 208/230-3-60, 460-3-60
299
135.6
35.02 [889.5]
19.5 [495.3]
15.3 [387.4]
16.5 [419.1]
50GL 024-036 Dimensions
7
Base unit dimensions—50GL042-060
ELECTRICAL
CHARACTERISTICS
lb
50GL042
208/230-1-60, 208/230-3-60, 460-3-60
321
50GL048
208-230-1-60, 208/230-3/60, 460-3-60
326
50GL060
208/230-1-60, 208/230-3-60, 460-3-60
399
50GL 042-060 Dimensions
8
CENTER OF GRAVITY
in. [mm]
kg
UNIT HEIGHT
in. [mm]
“A”
X
Y
Z
146
38.98 [990.2]
20.5 [520.7]
16.8 [425.5]
16.6 [421.6]
148
38.98 [990.2]
19.5 [495.3]
17.6 [447.6]
18.0 [457.2]
181
42.98 [1091.7]
20.5 [520.7]
16.2 [412.8]
17.6 [447.0]
UNIT WEIGHT
UNIT
Accessory dimensions
UNIT SIZE
A
in. [mm]
B
in. [mm]
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]
ODS CATALOG NUMBER
50GL024-036
50GL042-060
C
in. [mm]
D
in. [mm]
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]
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
Screw
(NOTE A)
Screw
(NOTE A)
Gasketing
inner flange*
*Gasketing
outer flange
Gasketing
inner flange*
*Gasketing
outer flange
Wood nailer*
Flashing field
supplied
Wood nailer*
Flashing field
supplied
Roofcurb*
Insulation (field
supplied)
Roofing material
field supplied
Insulation (field
supplied)
Roofing material
field supplied
Duct work
field supplied
Cant strip
field supplied
Roofcurb*
Cant strip
field supplied
Duct work
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.
44 5/16"
D
C Typ.
R/A
A
Insulated
deck pan
Short
Support
S/A
Gasket around
duct
Insulated
deck pan
Gasket around
outer edge
Long
Support
Return opening
(B X C)
9
50GL Corner weights (In Pounds)
1
2
y
4
3
x
Small Base
Large Base
Model 50GL
Corner Weight #1
024
76
030
036
042
048
060
84
85
71
78
85
Corner Weight #2
49
60
60
55
56
66
Corner Weight #3
57
61
64
85
80
108
Corner Weight #4
88
86
90
110
112
140
Total Weight
270
291
299
321
326
399
Selection Procedure
I Determine cooling and heating requirements at design
conditions:
Given:
Required Cooling Capacity (TC) . . . . . . . . . . 33,500 Btuh
Sensible Heat Capacity (SHC). . . . . . . . . . . . 24,500 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 50GL036 unit at 1200 cfm and
67°F ewb (entering wet bulb) will provide a total capacity
of 35,000 Btuh and a SHC of 26,000 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
= 4.4 kW of heat required
3414 Btuh/kW
Enter the Electric Heater Packages table for 208/240,
single-phase, 50GL036 unit. The 5-kW heater at 240v most
10
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:
External static pressure
0.200 in. wg
Filter
0.130 in. wg
Total static pressure
0.330 in. wg
Enter the table for Wet Coil Air Delivery — (230 and 460
V.) At 0.33 in. wg external static pressure and low speed,
the motor delivers 1228 cfm, and 440 watts.
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.
Performance data-Standard PSC Indoor Motor
COOLING CAPACITIES
50GL024 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
Evaporator Air—CFM/BF
600/0.08
800/0.10
1000/0.12
Evaporator Air — Ewb (F)
62
67
72
62
67
72
62
67
72
23.7
19.6
1.74
22.4
18.9
1.91
21.2
18.4
2.11
19.1
17.1
2.37
16.9
15.9
2.73
14.7
14.7
3.16
26.0
16.8
1.76
25.0
16.3
1.96
23.7
15.8
2.17
21.5
14.6
2.45
19.3
13.5
2.82
16.8
12.5
3.28
28.1
13.9
1.78
27.2
13.4
1.97
26.2
13.0
2.21
23.8
12.0
2.47
21.8
11.1
2.89
19.2
10.2
3.38
24.7
22.3
1.88
23.6
21.8
2.07
22.3
21.1
2.25
20.1
19.5
2.52
18.2
18.2
2.88
16.1
16.1
3.34
26.9
18.6
1.90
25.8
18.2
2.09
24.0
17.3
2.25
22.3
16.4
2.61
20.0
15.4
3.01
17.4
14.2
3.46
28.7
14.5
1.91
27.7
14.2
2.11
26.7
13.8
2.35
24.2
12.8
2.61
22.3
11.9
3.02
19.6
11.1
3.51
25.2
24.4
2.04
24.1
24.1
2.22
23.0
23.0
2.40
21.0
21.0
2.68
19.2
19.2
3.07
16.9
16.9
3.54
26.9
19.7
2.09
25.9
19.4
2.29
24.7
19.0
2.52
22.3
17.8
2.81
20.1
16.8
3.21
17.5
15.7
3.68
28.7
14.9
2.11
27.5
14.6
2.30
26.4
14.1
2.52
24.1
13.1
2.81
22.1
12.6
3.23
19.4
11.6
3.72
50GL030 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
Evaporator Air—CFM/BF
750/0.08
1000/0.11
1250/0.15
Evaporator Air — Ewb (F)
62
67
72
62
67
72
62
67
72
29.0
25.2
2.11
27.5
24.5
2.34
25.9
23.7
2.58
23.3
22.0
2.90
21.5
21.2
3.14
19.7
19.7
3.55
32.2
21.5
2.14
30.7
20.9
2.38
29.4
20.4
2.65
26.2
18.7
3.00
24.4
17.9
3.28
22.2
16.8
3.69
34.3
17.2
2.15
33.3
16.8
2.44
31.9
16.3
2.67
29.1
15.1
3.01
26.9
14.2
3.33
24.7
13.4
3.70
30.4
29.0
2.28
28.7
28.1
2.52
27.5
27.5
2.78
24.8
24.8
3.07
23.1
23.1
3.39
21.4
21.4
3.78
32.8
23.5
2.32
31.7
23.3
2.60
29.0
21.9
2.75
27.0
21.1
3.19
24.9
20.2
3.49
22.7
19.2
3.86
34.6
18.0
2.33
33.4
17.6
2.62
32.3
17.2
2.85
29.4
16.0
3.20
27.5
15.2
3.48
24.8
14.3
3.89
31.1
31.1
2.46
29.8
29.8
2.68
28.5
28.5
2.95
25.9
25.9
3.31
24.2
24.2
3.62
22.3
22.3
4.00
32.6
24.7
2.58
31.5
24.4
2.87
29.8
24.3
3.09
27.0
22.9
3.43
24.8
22.0
3.74
22.5
21.0
4.10
34.2
18.1
2.59
33.3
18.0
2.84
31.9
17.7
3.12
29.1
16.4
3.47
26.8
15.7
3.79
24.6
14.8
4.10
See Legend and Notes on page 13.
11
Performance data (cont)-Standard PSC Indoor Motor
COOLING CAPACITIES
50GL036 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
Evaporator Air—CFM/BF
900/0.09
1200/0.13
1500/0.18
Evaporator Air — Ewb (F)
62
67
72
62
67
72
62
67
72
35.2
30.3
2.58
32.9
28.7
2.83
31.0
27.9
3.11
27.9
26.0
3.49
25.5
24.7
3.85
22.2
22.2
4.48
38.7
25.5
2.61
36.9
24.8
2.88
34.9
24.0
3.19
31.5
22.2
3.59
28.8
21.0
3.96
24.6
19.1
4.59
41.6
20.7
2.61
39.9
20.1
2.89
37.9
19.3
3.20
34.3
17.7
3.60
31.4
16.5
3.96
27.0
14.8
4.61
36.6
34.0
2.79
34.8
33.3
3.05
32.4
30.8
3.33
29.3
28.3
3.73
27.5
27.5
4.07
24.0
24.0
4.71
39.8
28.0
2.84
37.9
27.4
3.11
35.0
26.0
3.33
32.2
24.8
3.82
29.4
23.4
4.19
25.0
21.5
4.79
41.9
21.6
2.83
40.2
21.0
3.12
38.3
20.3
3.43
34.6
18.6
3.82
31.5
17.5
4.19
27.0
15.8
4.84
37.3
37.3
3.03
35.5
35.5
3.28
33.8
33.8
3.56
30.7
30.7
3.97
28.3
28.3
4.34
24.5
24.5
4.98
39.5
29.3
3.14
37.7
28.8
3.43
35.7
28.0
3.74
32.0
26.5
4.15
29.2
25.2
4.46
24.8
23.0
5.09
41.5
21.6
3.14
39.8
21.1
3.43
37.8
20.5
3.73
34.0
18.7
4.13
31.0
17.6
4.51
26.3
15.8
5.15
50GL042 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
Evaporator Air—CFM/BF
1050/0.10
1750/0.17
62
67
72
62
67
72
62
67
72
40.9
35.2
2.93
38.8
34.2
3.26
36.5
33.1
3.60
31.9
30.3
4.26
28.6
28.6
4.92
25.3
26.6
5.62
44.6
29.5
2.97
42.7
28.7
3.31
40.7
27.8
3.70
35.8
25.3
4.42
32.0
23.6
5.10
28.4
21.8
5.84
48.1
23.4
2.99
46.3
22.8
3.35
44.2
22.0
3.73
39.4
20.0
4.46
35.6
18.6
5.18
32.0
17.1
5.97
42.3
39.8
3.20
40.4
39.0
3.53
38.1
38.1
3.87
33.9
33.9
4.50
30.8
30.8
5.06
27.8
27.8
5.66
45.8
32.4
3.27
43.8
31.7
3.62
41.0
30.4
3.94
36.8
28.5
4.75
32.9
26.9
5.47
29.1
25.1
6.24
49.1
24.6
3.30
47.1
24.0
3.66
45.0
23.3
4.03
40.0
21.3
4.78
36.0
20.0
5.49
32.1
18.5
6.26
43.1
43.1
3.48
41.5
41.5
3.76
39.8
39.8
4.15
35.5
35.5
4.91
32.2
32.2
5.63
29.0
29.0
6.41
45.9
34.4
3.70
43.9
33.8
4.04
41.6
33.0
4.43
36.5
30.7
5.17
32.7
29.1
5.84
28.9
27.2
6.57
48.8
25.1
3.72
46.9
24.5
4.07
44.7
23.9
4.45
39.8
22.1
5.21
35.5
20.6
5.94
31.3
19.0
6.73
See Legend and Notes on page 13.
12
1500/0.13
Evaporator Air — Ewb (F)
Performance data (cont)-Standard PSC Indoor Motor
COOLING CAPACITIES
50GL048 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
Evaporator Air—CFM/BF
1200/0.06
1600/0.08
2000/0.11
Evaporator Air — Ewb (F)
62
67
72
62
67
72
62
67
72
47.9
41.5
3.38
45.7
40.4
3.77
43.3
39.1
4.15
39.2
36.4
4.67
35.3
34.4
5.32
32.0
32.0
6.16
52.3
34.8
3.43
50.2
34.1
3.80
47.9
33.1
4.23
43.7
30.8
4.79
39.6
29.0
5.50
35.2
27.0
6.31
56.8
28.2
3.48
54.7
27.4
3.86
52.3
26.5
4.28
47.9
24.6
4.82
43.7
23.0
5.54
38.7
21.0
6.34
49.6
47.4
3.68
47.5
46.5
4.03
45.3
45.3
4.41
41.5
41.5
4.93
38.2
38.2
5.65
34.4
34.4
6.47
53.7
38.7
3.78
51.6
37.9
4.16
48.0
36.2
4.46
44.6
34.6
5.14
40.3
32.8
5.85
35.5
30.8
6.63
58.1
29.9
3.82
56.1
29.3
4.21
53.7
28.5
4.63
48.9
26.4
5.19
44.3
24.7
5.89
39.3
22.8
6.69
50.5
50.5
4.01
48.9
48.9
4.36
47.0
47.0
4.78
42.9
42.9
5.34
39.3
39.3
6.06
35.0
35.0
6.89
54.0
41.6
4.23
51.6
40.9
4.63
48.9
39.9
5.07
44.3
37.5
5.60
40.1
35.7
6.27
35.2
33.4
7.04
57.7
30.7
4.27
56.0
30.3
4.68
53.5
29.5
5.11
48.9
27.6
5.66
44.0
26.0
6.36
38.8
24.0
7.16
50GL060 COOLING PERFORMANCE TABLE
Temp (F)
Outdoor Air
Entering
Condenser
75
85
95
105
115
125
BF
Ewb
kW
SHC
TC
PSC
—
—
—
—
—
—
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
Evaporator Air—CFM/BF
1500/0.05
1750/0.06
2000/0.07
2500/0.08
Evaporator Air — Ewb (F)
62
67
72
62
67
72
62
67
72
62
67
72
57.6
50.6
4.63
54.4
49.0
5.06
51.2
47.5
5.54
45.8
44.0
6.17
41.9
41.9
6.75
38.6
38.6
7.36
64.3
43.0
4.69
60.9
41.6
5.17
57.5
40.0
5.68
51.9
37.0
6.35
47.6
35.1
6.94
43.2
33.2
7.64
69.9
34.4
4.75
67.0
33.4
5.21
63.7
32.2
5.72
57.7
29.5
6.39
53.2
27.8
6.98
48.3
25.8
7.67
59.8
55.5
4.67
56.4
53.6
5.10
53.1
51.9
5.58
47.8
47.8
6.23
44.5
44.5
6.83
41.1
41.1
7.58
66.1
46.2
4.71
63.0
45.0
5.17
59.0
43.2
5.64
53.4
40.3
6.36
49.0
38.3
6.95
44.5
36.3
7.64
71.7
36.3
4.78
68.6
35.2
5.23
65.3
34.0
5.74
59.1
31.4
6.41
54.4
29.6
6.99
49.4
27.6
7.68
61.7
59.8
4.68
58.0
58.0
5.14
55.1
55.1
5.64
50.2
50.2
6.30
46.8
46.8
6.82
43.1
43.1
7.63
67.6
49.3
4.73
64.5
48.2
5.18
60.7
46.8
5.69
54.6
43.4
6.37
50.1
41.5
6.95
45.4
39.3
7.64
73.1
38.1
4.80
69.9
37.0
5.26
66.5
35.8
5.76
60.1
33.1
6.42
55.2
31.3
7.01
50.0
29.1
7.69
65.0
65.0
4.70
62.3
62.3
5.17
59.3
59.3
5.68
53.8
53.8
6.36
50.0
50.0
6.94
46.0
46.0
7.64
69.6
54.8
4.75
66.4
54.0
5.21
62.7
52.8
5.71
56.2
49.3
6.38
51.6
47.1
6.95
46.7
44.5
7.65
75.1
41.3
4.84
71.6
40.2
5.29
68.1
39.1
5.79
61.4
36.2
6.44
56.5
34.5
7.03
51.0
32.1
7.71
LEGEND
Bypass Factor
Entering Wet-Bulb
Total Unit Power Input
Sensible Heat Capacity (1000 Btuh)
Cooling Capacity (1000 Btuh)
Permanent Split Capacitor
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
ldb
= t
edb
sensible capacity (Btuh)
1.10 x cfm
t lwb = Wet-bulb temperature corresponding to enthalpy of air leaving
evaporator coil (h lwb )
hlwb = hewb
total capacity (Btuh)
4.5 x cfm
Where: h ewb = Enthalpy of air entering evaporator coil
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
Performance data (cont)
ECONOMIZER 1-in. FILTER PRESSURE DROP (in. wg)
UNIT50GL
PRESSURE DROP
024-036
0.20
042-060
0.25
MULTIPLICATION FACTORS
HEATER kW
RATING
VOLTAGE
DISTRIBUTION
MULTIPLICATION
FACTOR
240
200
208
230
240
.69
.75
.92
1.00
480
440
460
480
.84
.92
1.00
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
20 X 20 X 1
0.05
0.07
0.08
0.10
0.12
0.13
0.14
0.15
—
—
—
—
—
—
—
—
—
—
2300
—
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
ELECTRIC HEAT PRESSURE DROP TABLES
Small Cabinet: 024-036
STATIC
CFM
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
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
Large Cabinet: 042-060
STATIC
CFM
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
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
14
WET COIL DELIVERY—STANDARD 50GL UNIT 024-060
230 AND 460 VOLT
Unit
50GL
Motor Speed
Low
024
Med
High
Low
030
Med
High
Low
036
Med
High
Low
042
Med
High
Low
048
Med
High
Low
060
Med
High
External Static Pressure (in.wg)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
—
—
—
—
—
—
—
Watts
281
282
281
278
276
Cfm
833
776
702
638
554
Watts
—
—
—
375
370
363
357
352
—
—
Cfm
—
—
—
894
800
754
636
518
—
—
—
Watts
—
—
—
—
—
468
457
444
431
423
—
Cfm
—
—
—
—
—
884
802
697
467
397
—
Watts
246
244
243
241
—
—
—
—
—
—
—
Cfm
910
806
749
680
—
—
—
—
—
—
—
Watts
343
339
336
332
328
322
317
—
—
—
—
Cfm
1148
1104
1028
958
850
782
645
—
—
—
—
Watts
—
—
—
—
441
432
421
410
400
—
—
Cfm
—
—
—
—
1102
988
896
783
529
—
—
Watts
—
470
458
445
430
415
399
384
—
—
—
1257
1240
1199
1107
1015
924
—
—
—
Cfm
—
1350
Watts
—
—
514
501
487
471
455
438
422
—
—
Cfm
—
—
1338
1295
1288
1181
1111
968
813
—
—
Watts
—
—
—
646
636
626
614
602
589
—
—
Cfm
—
—
—
1385
1268
1196
1159
1032
948
—
—
Watts
—
625
614
605
593
574
549
518
485
454
—
Cfm
—
1540
1510
1473
1396
1348
1288
1192
1124
1037
—
Watts
—
—
—
—
726
695
661
625
591
561
540
Cfm
—
—
—
—
1648
1593
1530
1446
1352
1237
1114
Watts
—
—
—
—
—
—
—
790
766
742
713
Cfm
—
—
—
—
—
—
—
1616
1492
1394
1283
Watts
—
588
577
572
566
556
539
517
491
—
—
Cfm
—
1514
1543
1467
1408
1374
1324
1237
1161
—
—
Watts
—
756
738
719
699
676
650
623
596
572
555
1253
Cfm
—
1785
1765
1706
1628
1577
1503
1421
1357
1298
Watts
—
—
—
—
896
862
829
800
775
752
728
Cfm
—
—
—
—
1880
1804
1704
1547
1565
1406
1367
Watts
903
898
873
842
814
792
777
764
743
701
618
Cfm
2190
2158
2081
2026
1958
1866
1822
1744
1678
1535
1377
Watts
—
1002
978
960
941
914
880
839
798
764
750
Cfm
—
2389
2291
2216
2120
2020
1952
1852
1727
1617
1549
Watts
—
—
—
1080
1080
1066
1041
1008
972
938
—
Cfm
—
—
—
2316
2181
2122
2101
2000
1802
1672
—
NOTES:
1. Deduct 10% For 208v.
2. Deduct field-supplied air filter pressure drop to obtain external Static pressure available for ducting.
3. Air delivery values are without air filter.
4. Dashes indicate portions of table that are beyond the blower motor capacity or are not recommended.
15
50GL ICM FIOP DRY COIL AIRFLOW–SMALL CABINET
UNIT
SIZE
024
030
036
CFM ADJUST
PIN SELECT
LO PIN
NOM PIN
HI PIN
EXTERNAL STATIC
PRESSURE RANGE
0.0–0.4
0.4–0.7
0.7–1.0
0.0–0.4
0.4–0.7
0.7–1.0
0.0–0.4
0.4–0.7
0.7–1.0
COOLING
800
725
—
885
805
730
990
930
855
COOLING
DEHUMIDIFY
715
670
—
715
695
645
795
775
745
COOLING
1010
920
825
1105
1030
930
1255
1160
1050
COOLING
DEHUMIDIFY
890
845
795
890
865
825
1010
980
925
COOLING
1110
1025
970
1235
1175
1115
1400
1355
1280
COOLING
DEHUMIDIFY
990
960
910
990
975
940
1125
1110
1085
50GL ICM FIOP DRY COIL AIRFLOW–LARGE CABINET
UNIT
SIZE
CFM ADJUST
PIN SELECT
LO PIN
NOM PIN
HI PIN
EXTERNAL STATIC
PRESSURE RANGE
0.1–1.0
0.1–1.0
0.1–1.0
COOLING
1100
1225
1410
042
COOLING
DEHUMIDIFY
980
980
1125
COOLING
1260
1400
1610
048
COOLING
DEHUMIDIFY
1120
1120
1290
COOLING
1575
1750
2010
060
COOLING
DEHUMIDIFY
1400
1400
1610
50GL ICM FIOP WET COIL PRESSURE DROP
16
STANDARD CFM
UNIT
SIZE
600
700
800
900
1000
024
0.005
0.007
0.010
0.012
0.015
—
030
—
0.007
0.010
0.012
0.015
0.018
036
—
—
—
0.019
0.023
0.027
042
—
—
—
—
0.014
048
—
—
—
—
060
—
—
—
—
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2100
—
—
—
—
—
—
—
—
—
—
0.021
0.024
—
—
—
—
—
—
—
—
0.032
0.037
0.042
0.047
—
—
—
—
—
—
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
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
TOP COVER
FROM
POWER
SOURCE
DISCONNECT
PER NEC*
*NEC - NATIONAL ELECTRICAL CODE
C00063
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
18
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 cooling airflow
is 350 cfm/ton.
Minimum cooling ambient operating temperature — All
standard units have a minimum ambient operating
temperature of 40°F. Units with the ICM Indoor Motor FIOP
have a minimum cooling outdoor operating temperature of
55°F. With accessory low ambient temperature kit, units can
operate at temperatures down to 0°F.
Maximum operating outdoor air temperature — Maximum
outdoor operating air temperature for cooling is 125°F.
Electrical data
UNIT
SIZE
50GL
024
V-PH-Hz
VOLTAGE
RANGE
Min
Max
COMPRESSOR
RLA
LRA
OUTDOOR
INDOOR
FAN MOTOR FAN MOTOR
FLA
FLA
208/230-1-60
187
253
13.5
61.0
0.8
2.0
208/230-1-60
187
253
14.7
73.0
0.8
2.1
208/230-3-60
187
253
9.6
63.0
0.8
2.1
208/230-1-60
187
253
15.4
83.0
0.8
3.6
208/230-3-60
187
253
12.2
77.0
0.8
3.6
460-3-60
414
506
5.1
35.0
0.8
1.9
208/230-1-60
187
253
18.6
105.0
0.8
4.1
208/230-3-60
187
253
13.8
88.0
0.8
4.1
460-3-60
414
506
6.3
39.0
0.8
2.0
208/230-1-60
187
253
20.5
109.0
1.6
4.1
208/230-3-60
187
253
14.7
91.0
1.6
4.1
460-3-60
414
506
6.5
46.0
0.9
2.0
208/230-1-60
187
253
27.6
158.0
1.6
6.2
208/230-3-60
187
253
18.1
137.0
1.6
6.2
460-3-60
414
506
9.0
62.0
0.9
3.2
030
036
042
048
060
See Legend and Notes on p. 20
ELECTRIC HEAT
Nominal kW*
FLA
—/—
3.8/5.0
5.4/7.2
7.5/10.0
—/—
3.8/5.0
5.4/7.2
7.5/10.0
—/—
3.8/5.0
7.5/10.0
—/—
3.8/5.0
5.4/7.2
7.5/10.0
11.3/15.0
—/—
3.8/5.0
7.5/10.0
11.3/15.0
—/—
5.0
10.0
15.0
—/—
3.8/5.0
5.4/7.2
7.5/10.0
11.3/15.0
15.0/20.0
—/—
3.8/5.0
7.5/10.0
11.3/15.0
15.0/20.0
—/—
5.0
10.0
15.0
20.0
—/—‚
3.8/5.0
5.4/7.2
7.5/10.0
11.3/15.0
15.0/20.0
—/—
3.8/5.0
7.5/10.0
11.3/15.0
15.0/20.0
—/—
5.0
10.0
15.0
20.0
—/—
3.8/5.0
5.4/7.2
7.5/10.0
11.3/15.0
15.0/20.0
—/—
3.8/5.0
7.5/10.0
11.3/15.0
15.0/20.0
—/—
5.0
10.0
15.0
20.0
—/—
18.1/20.8
25.9/30.0
36.1/41.7
—/—
18.1/20.8
25.9/30.0
36.1/41.7
—/—
10.4/12.0
20.8/24.1
—/—
18.1/20.8
25.9/30.0
36.1/41.7
54.2/62.5
—/—
10.4/12.0
20.8/24.1
31.3/36.1
—/—
6.0
12.0
18.0
—/—
18.1/20.8
25.9/30.0
36.1/41.7
54.2/62.5
72.2/83.3
—/—
10.4/12.0
20.8/24.1
31.3/36.1
41.6/48
—/—
6.0
12.0
18.0
24.1
—/—
18.1/20.8
25.9/30.0
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
—/—
6.0
12.0
18.0
24.1
—/—
18.1/20.8
25.9/30.0
36.1/41.7
54.2/62.5
72.2/83.3
—/—
10.4/12.0
20.8/24.1
31.3/36.1
41.6/48
—/—
6.0
12.0
18.0
24.1
POWER SUPPLY
MAX FUSE
UNIT MCA or CKT. BKR.
MOCP
19.7/19.7
25.1/28.5
34.9/40.0
47.6/54.6
21.3/21.3
25.2/28.7
35.0/40.1
47.8/54.7
14.9/14.9
15.7/17.7
28.7/32.7
23.7/23.7
27.1/30.5
36.9/42.0
49.6/56.6
72.2/82.6
19.7/19.7
19.7/19.7
30.6/34.6
43.6/49.6
9.1
9.9
17.4
24.9
28.2/28.2
28.2/31.2
37.5/42.6
50.3/57.2
72.8/83.3
95.4/109.3
22.2/22.2
22.2/22.2
31.2/35.2
44.2/50.2
57.1/65.1
10.7
10.7
17.5
25.1
32.6
31.3/31.3
31.3/31.3
37.5/42.6
50.3/57.2
72.8/83.3
95.4/109.3
24.1/24.1
24.1/24.1
31.2/35.2
44.2/50.2
57.1/65.1
11.0
11.0
17.5
25.1
32.6
42.3/42.3
42.3/42.3
40.1/42.6
52.9/59.8
75.4/85.9
98.0/111.9
30.4/30.4
30.4/30.4
33.8/37.8
46.8/52.9
59.7/67.7
15.4
15.4
19.0
26.6
34.1
25/25
25/30
40/50
50/60
25/25
25/30
40/50
50/60
20/20
20/20
30/35
30/30
30/30
40/50
50/60
—
25/25
25/25
35/35
45/50
15
15
20
25
35/35
35/35
40/50
60/60
—
—
30/30
30/30
35/40
45/60
—
15
15
20
30
35
40/40
40/40
40/50
60/60
—
—
30/30
30/30
35/40
45/60
—
15
15
20
30
35
50/50
50/50
40/50
60/60
—
—
35/35
35/35
35/40
50/60
—
20
20
20
30
35
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
80/90
—
—
—
—
—
—
—
—
—
—
—
—
80/90
100/110
—
—
—
—
60/70
—
—
—
—
—
—
—
—
—
80/90
100/110
—
—
—
—
60/70
—
—
—
—
—
—
—
—
—
80/90
100/125
—
—
—
—
60/70
—
—
—
—
—
19
50GL WITH ICM FIOP ELECTRICAL DATA
UNIT
SIZE
50GL
VOLTAGE
RANGE
V-PH-Hz
Min
Max
OUTDOOR
INDOOR
FAN MOTOR FAN MOTOR
COMPRESSOR
RLA
LRA
FLA
FLA
024
208/230-1-60
187
253
13.5
61.0
0.8
4.3
030
208/230-1-60
187
253
14.7
73.0
0.8
4.3
036
208/230-1-60
187
253
16.9
83.0
1.6
6.8
042
208/230-1-60
187
253
22.4
105.0
0.9
6.8
048
208/230-1-60
187
253
20.5
109.0
1.6
6.8
060
208/230-1-60
187
253
27.6
158.0
1.6
9.1
—
—
—
—
—
Full Load Amps
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
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.
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%. Use the following formula to determine
the percentage of voltage imbalance.
% Voltage imbalance
max voltage deviation from average voltage
= 100 x
average voltage
20
Nominal kw*
—/—
3.8/5.0
5.4/7.2
7.5/10.0
—/—
3.8/5.0
5.4/7.2
7.5/10.0
—/—
3.8/5.0
5.4/7.2
7.5/10.0
11.3/15.0
—/—
3.8/5.0
5.4/7.2
7.5/10.0
11.3/15.0
15.0/20.0
—/—
3.8/5.0
5.4/7.2
7.5/10.0
11.3/15.0
15.0/20.0
—/—
3.8/5.0
5.4/7.2
7.5/10.0
11.3/15.0
15.0/20.0
FLA
—/—
18.1/20.8
25.9/30.0
36.1/41.7
—/—
18.1/20.8
25.9/30.0
36.1/41.7
—/—
18.1/20.8
25.9/30.0
36.1/41.7
54.2/62.5
—/—
18.1/20.8
25.9/30.0
36.1/41.7
54.2/62.5
72.2/83.3
—/—
18.1/20.8
25.9/30.0
36.1/41.7
54.2/62.5
72.2/83.3
—/—
18.1/20.8
25.9/30.0
36.1/41.7
54.2/62.5
72.2/83.3
SINGLE POINT
POWER SUPPLY
MAX FUSE
UNIT MCA or CKT. BKR.
22.2/22.0
27.9/31.4
37.8/42.9
50.5/27.5
23.5/23.5
27.9/31.4
37.8/42.9
50.5/57.5
26.9/26.9
31.1/34.5
40.9/46.0
53.6/60.6
76.2/86.6
30.9/30.9
31.1/34.5
40.9/46.0
53.6/60.6
76.2/86.6
98.8/112.7
34.0/34.0
34.0/34.5
40.9/46.0
53.6/60.6
76.2/86.6
98.8/112.7
45.2/45.2
45.2/45.2
43.8/48.9
56.5/63.5
79.1/89.5
101.6/115.5
30/30
30/35
40/50
60/60
30/30
30/35
40/50
60/60
35/35
35/40
50/50
60/–
—
40/10
40/40
50/50
60/–
—
—
40/40
40/40
50/50
60/–
—
—
60/60
60/60
50/50
60/–
—
—
MOCP
—
—
—
—
—
—
—
—
—
—
—
–/70
80/90
—
—
—
–/70
90/90
100/125
—
—
—
–/70
90/90
100/125
—
—
—
–/70
90/90
110/125
EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
LEGEND
FLA
LRA
MCA
MOCP
RLA
ELECTRIC HEAT
Average Voltage = 452 + 464 + 455
3
1371
=
3
= 457
Determine maximum deviation from average voltage.
(AB) 457 452 = 5 v
(BC) 464 457 = 7 v
(AC) 457 455 = 2 v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
7
% Voltage Imbalance = 100 x
457
= 1.53%
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.
Typical wiring schematic — 208/230-1-60 shown
21
Typical wiring schematic — 208/230-3-60 shown
208/230-3-30
22
Typical wiring schematic — 460-3-60 shown
23
ICM FIOP wiring schematic— 208-230-1-60
24
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 set of
normally open contacts of TDR close and complete the
circuit through IFM. The IFM starts instantly.
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 a 60-second delay, the
IFM shuts off. If the thermostat fan selector switch is in the
“ON” position, the IFM will run continuously.
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 TDR. 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 and the TDR. After a 60-second delay, the IFM
shuts off. If the thermostat fan selector switch is in the “ON”
position, the IFM will run continuously.
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.
ICM FIOP Models Only — 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.
25
Guide specifications
Packaged Electric Cooling Units
Constant Volume Application
HVAC Guide Specifications
Size Range: 2 to 5 Tons, Nominal Cooling
Carrier Model Number: 50GL
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 Standards.
F. Insulation and adhesives shall meet NFPA 90A requirements 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.
26
5. Unit shall have a field-supplied condensate trap.
C. Fans:
1. The evaporator fan shall be 3-speed, direct-drive, as
shown on equipment drawings, or factory installed
variable speed motor and control.
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 single body
fixed orifice feed 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 40° F ambient outdoor temperature.
(55°F with ICM FIOP)
3. Unit shall be provided with 60-second fan time delay after the thermostat is satisfied (with standard
indoor blower motor).
4. On ICM FIOP-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.
Guide specifications (cont)
2. All fan motors shall have permanently lubricated
bearings, and inherent, automatic reset, thermal
overload protection.
3. Condenser fan motor shall be totally enclosed.
L. Grille
1. Louvered Grille:
Louvered grille shall be standard on all units.
M. Special Features Available
1. ICM Indoor Blower FIOP: Integral control motor
shall be a factory installed option for optimizing
comfort levels in all operating modes and increasing
system efficiency.
2. Coil Options:
Shall include factory-installed optional copper/
copper and vinyl-coated refrigerant coils.
3. Economizer:
a. Economizer controls capable of providing free
cooling using outside air.
b. Equipped with low leakage dampers not to exceed 3% leakage, at 1.0 in. wg pressure differential.
c. Spring return motor shuts off outdoor damper on
power failure.
4. Flat Roof Curb:
Curbs shall have seal strip and a wood nailer for
flashing and shall be installed per manufacturer’s
instructions.
5. Manual Outdoor Air Damper:
Package shall consist of damper, birdscreen, and
rainhood which can be preset to admit outdoor air
for year-round ventilation.
6. Thermostat:
To provide for one-stage heating and cooling in ad-
7.
8.
9.
10.
11.
12.
13.
dition manual or automatic changeover and indoor
fan control.
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.
Filter Rack Kit:
Shall provide filter mounting for downflow applications.
Square-To-Round Duct Transitions:
Shall have the ability to convert the supply and return openings from rectangular to round. (024-048
only)
Compressor Protection (Time Guard® II Kit)
Solid-state control shall protect compressor by preventing “short cycling.”
Crankcase Heater:
Shall provide anti-floodback protection for lowload cooling applications.
Electric heaters:
a. Electric heater shall be available as a fieldinstalled option.
b. Heater elements shall be open wire type, adequately supported and insulated with ceramic
bushings.
c. Electric heater packages must provide single
point power connection capability.
Compressor Hard start kit:
Shall be available to give a boost to the compressor
motor at each start-up. (Single Phase only).
27
Carrier Corporation • Indianapolis, IN 46231
5-01
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1
Tab
4
1b 1a
New Book 1
Tab
OP2a
Page 28
Catalog No. 525-00013
Printed in U.S.A.
PC 101
Form 50GL-2PD
Replaces: 50GL-1PD
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