Product Data
Product
Data
48/50TJ016-028
Single-Package
Rooftop Units
60 Hz
15 to 25 Nominal Tons
Standard Efficiency Rooftop Units
with:
• Dual, electrically and mechanically
independent refrigerant circuits
• Scroll compressors on each circuit
• TXV refrigerant metering devices
• Pre-painted galvanized steel cabinet
for long life and quality appearance
• Non-corrosive, sloped condensate drain pans meet ASHRAE
62-89 (IAQ)
• Two-inch return air filters
• Heating options:
— Natural gas (48TJ Only)
— LP gas (48TJ Only)
— Electric heat (50TJ Only)
— Hydronic glycol heating coil
(50TJ Only)
48/50TJ016,020
Features/Benefits
Every compact one-piece
unit arrives fully assembled,
charged, tested, and ready
to run.
Durable, dependable
construction
48/50TJ024,028
Copyright 1998 Carrier Corporation
Designed for durability in any climate,
the weather-resistant cabinets are
constructed of galvanized steel, bonderized, and all exterior panels are
coated with a prepainted baked enamel
finish. The paint finish is non-chalking,
and is capable of withstanding
ASTM B117 500-hour Salt Spray
Test. All internal cabinet panels are
primed, permitting longer life and
a more attractive appearance for the
entire unit. Totally enclosed condenserfan motors and permanently-lubricated
bearings provide additional unit
dependability.
Form 48/50TJ-1PD
Easy installation
All units fit one size roof curb. The
contractor can order and install the
roof curb early in the construction
stage, before decisions on size requirements are made.
All units feature base rail design
with forklift slots and rigging holes for
easier maneuvering. Durable packaging protects all units during shipment
and storage.
The units can be easily converted
from a vertical to a horizontal discharge configuration by using the
horizontal supply/return adapter roof
curbs.
NOTE: On units using horizontal supply and return, the accessory barometric relief or power exhaust MUST
be installed on the return ductwork.
Convenient duct openings in the
unit basepans permit side-by-side
or concentric duct connections (see
Application data section on page 59)
without requiring internal unit
modification.
The non-corrosive sloped condensate pan permits either an external, horizontal, side condensate drain
(outside the roof curb) or an internal, vertical, bottom drain (inside the
roof curb). Both options require an
external, field-supplied P-trap.
Factory- and field-installed electric
heaters are available in a wide range
of capacities (50TJ). Gas heat is available on 48TJ units.
Indoor-air quality begins with
Carrier rooftops
Sloped condensate pans minimize biological growth in rooftop units in
accordance with ASHRAE (American
Society of Heating, Refrigeration,
and Air Conditioning Engineers) Standard 62. Two-in. filters with optional
dirty filter indicator switch provide for
greater particle reduction in the return air. The face-split evaporator
coils improve the dehumidification capability of the standard units, and
standard enthalpy controls provided
with the optional economizers
maximize building humidity control.
Simple electrical connections
Terminal boards, located in the base
unit control box, facilitate connections
to room thermostat, outdoor thermostat(s), economizer, and electric
heat. Service panels are quickly
removed, permitting easy servicing.
2
Thru-the-curb service connections
allow power and control wiring to
be routed through the curb, minimizing roof penetrations. Both power
and control connections are made on
the same side of the unit to simplify
installation. In addition, color-coded
wires permit easy tracing and
diagnostics.
Integrated economizers and
outdoor air
During a first stage call for cooling, if
the outdoor-air temperature is below the control changeover set point,
the discharge-air sensor modulates
the economizer outdoor-air damper
open to achieve the set point. When
second-stage cooling is called for,
the compressor is energized in addition to the economizer. If the outdoorair temperature is above the
changeover set point, the first stage of
compression is activated and the
economizer stays at vent position.
Economizer operation is controlled by
Accusensor™ I dry-bulb thermostat
that senses outdoor-air temperature.
Accessory upgrade kits include
solid-state enthalpy sensor control
and differential enthalpy sensor.
For units without economizer, yearround ventilation is enhanced by a
Table of contents
manual outdoor-air damper. The
damper can be preset to admit up to
25% outdoor air.
In addition, the barometric relief
damper or power exhaust accessory
can be utilized to help maintain proper
building pressure.
Quiet, efficient operation and
dependable performance
Scroll compressors have vibration isolators for extremely quiet operation.
Efficient fan and motor design permits
operation at very low sound levels.
These units offer high energy efficiency and lower utility costs through
part load operation using 2 stages
of cooling. Each stage of cooling has
its own scroll compressor and independent refrigerant circuit. Each circuit
features a thermostatic expansion
valve (TXV) for refrigerant metering.
Quiet and efficient operation is provided by belt-driven evaporator fans.
The belt-driven evaporator-fan with
variable-pitch pulleys allows adjustment
to available static pressure to meet
the job requirements of even the most
demanding applications. A standard
(low-medium static) and alternate (high
static) drive is available for these
units.
Page
Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,5
ARI Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,7
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-12
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-16
Base Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-20
Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-23
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-39
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40-42
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43,44
Typical Wiring Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45-49
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50-58
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59,60
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61-64
Features/Benefits (cont)
Gas heating units
Integrated gas unit controller
(IGC) (48TJ models) — All ignition
components are contained in the
compact IGC which is easily accessible for servicing. The IGC control board, designed and manufactured
exclusively for Carrier rooftop units,
provides built-in diagnostic capability.
An LED (light-emitting diode) simplifies troubleshooting by providing visual fault notification and system
status confirmation.
The IGC also contains an exclusive
anti-cycle protection for gas heat
operation. After 4 continuous cycles
on the unit high-temperature limit
switch, the gas heat operation is disabled, and an error code is issued.
This feature greatly improves reliability
of the rooftop unit.
The IGC also contains burner control logic for accurate and dependable gas ignition. The LED is visible
without removing the unit control box
access panel. This LED faultnotification system reduces service
person troubleshooting time and minimizes service costs. The IGC also
maximizes heating efficiency by controlling evaporator-fan on and off
delays.
Efficient, dependable operation
— Tubular, dimpled gas heat exchangers optimize heat transfer for
improved efficiency. The tubular design
permits hot gases to make multiple
passes across the path of the supply air. The dimpled design creates a
turbulent gas flow to maximize heating
efficiency. The extra thick Alumagard™ heat exchanger coating provides corrosion resistance and ensures
long life.
The unsightly appearance of flue
stacks is eliminated and the effects of
wind on heating operations are diminished by the induced draft combustion system. The inducer fan draws
hot combustion gas through the heat
exchanger at the optimum rate for the
most effective heat transfer. The heat
exchanger operates under negative
pressure, preventing flue gas leakage
into the indoor supply air.
During the Heating mode, the
evaporator-fan relay automatically
starts the evaporator fan after the
heat exchanger warms up to a suitable temperature. The 30-second fan
delay prevents cold air from entering
the supply duct system when the conditioned space is calling for heat to
maximize efficiency.
The direct-spark ignition system
saves operating expense when compared to pilot ignition systems. No
crossover tube is required, therefore
no sooting or pilot fouling problems
can occur.
All 48TJ standard units are designed for natural gas, but an accessory LP (liquid propane) conversion kit
is available, if required.
Safety is built in — All 48TJ units
have a flame rectification sensor to
quickly sense the burner flame and
ignite burners almost immediately.
Fast shutdown is a certainty since the
sensor reacts quickly to any flame
outage or system failure. In the event
of a shutdown, an error code is issued at the IGC board.
Safety is also assured due to the
heating safety controls which will shut
down the unit if there is a problem.
If excessive temperatures develop,
limit switches shut off the gas valve.
After 4 continuous short cycles of the
high-temperature limit switch, the
IGC board locks out the gas heat
cycle to prevent any further short
cycles. This safety feature is provided
exclusively on Carrier rooftop units.
The rollout switch also deenergizes
the gas valve in the event of a flame
rollout.
Carrier Apollo controls add
reliability, efficiency, and
simplification
The Apollo direct digital controls are
ordered as a factory-installed option. Designed and manufactured
exclusively by Carrier, the controls can
be used to actively monitor and control all modes of operation, as well
as to monitor evaporator-fan status, filter status, indoor-air quality (humidity and carbon dioxide), supplyair temperature, and outdoor-air
temperature.
The Apollo communicating controls
are factory-installed into the unit
control box, and come equipped with
built-in diagnostic capabilities. Lightemitting diodes (LEDs) simplify troubleshooting by indicating thermostat
commands for both stages of heating
and cooling, evaporator fan operation, and economizer operation. The
Apollo communicating controls are
designed to work specifically with the
Carrier TEMP and VVTt (variable volume and temperature) thermostats.
The Apollo controls, combined with
Carrier thermostats, incorporate a
5-minute recycle delay timer between
modes of operation to prevent short
cycling.
The standard rooftop control system is readily adaptable to all conventional and programmable thermostats. In addition, units with the Apollo
controls are suitable for integration
into building monitor control systems
if required. This system gives these
units the flexibility to communicate
with almost any thermostat or building
control system.
Service option package
Servicing a rooftop unit has never
been easier with the new factoryinstalled service option package for
these rooftop units. This package
includes the following features:
• Hinged access panels are provided
for the filter/indoor-fan motor,
compressors, evaporator fan, and
control box areas. Quick access
to major components is accomplished
by simply unlatching and swinging
open the various panels. Each
hinged panel is permanently
mounted to the unit, thereby eliminating the concern of a dropped
or wind-blown panel puncturing
delicate roof materials. The 4 extended access panels are also
equipped with ‘‘tie back’’ retaining
devices to hold the door in the
open position while servicing the
unit.
• An external, covered, 115-v Ground
Fault Interrupt (GFI) receptacle is
provided as a convenient power
source for drills, lights, refrigerant
recovery units, or other electrical service tools. Simply connect
the outlet to a field-supplied and
properly fused branch circuit power
supply.
• An integral non-fused disconnect
switch within the rooftop unit reduces installation time, labor and
material costs. Safety is assured by
an interlock which prevents access to the control box unless the
switch is in the OFF position. In
addition, the externally mounted
handle incorporates power lockout
capability to further protect service personnel.
3
Model number nomenclature
LEGEND
AL — Aluminum
CU — Copper
4
50
TJ
–
024
Z
–
–
6
– – YA
50 – Cooling Only/Cooling with
Optional Electric Heat
Factory-Installed Options*
TJ – Constant Volume
Packaging
1 – Domestic
Nominal Tons
016 – 15 Tons
020 – 18 Tons
024 – 20 Tons
028 – 25 Tons
Service/Control Options
- – Standard Controls
G – Service Option
Y – Service Option with Apollo Control
Z – Apollo Controls
Fan Drive Position (Standard Motor)
- – Standard Motor
Design Series
0 – Original
1 – 1st design change
2 – 2nd design change, etc.
Voltage
1 – 575-3-60
2 – 380-3-60
5 – 208/230-3-60
6 – 460-3-60
Coil Protection Options
- – Al/Cu Condenser & Evaporator
B – Cu/Cu Condenser & Evaporator
C – Cu/Cu Condenser & Al/Cu Evaporator
V – Black Pre-Coated Condenser Fins
LEGEND
Al
— Aluminum
Cu
— Copper
FIOP — Factory-Installed Option
*Refer to 50TJ Price Pages for 50TJ FIOP code table or contact your local Carrier representative for more details.
5
ARI* capacity ratings
Bels
db
EER
IPLV
wb
UNIT
48TJD
NOMINAL
TONS
STANDARD
CFM
016
020
024
028
15
18
20
25
5250
6200
6600
7200
UNIT
48TJF
NOMINAL
TONS
STANDARD
CFM
016
020
024
028
15
18
20
25
5250
6200
6600
7200
UNIT
50TJ
NOMINAL
TONS
STANDARD
CFM
016
020
024
028
15
18
20
25
5250
6200
6600
7200
—
—
—
—
—
NET COOLING
CAPACITY
(Btuh)
174,000
188,000
220,000
268,000
TOTAL
WATTS
EER
20,128
21,619
25,513
31,068
8.6
8.7
8.6
8.6
NET COOLING
CAPACITY
(Btuh)
174,000
186,000
218,000
268,000
TOTAL
WATTS
EER
20,154
21,798
25,719
31,600
8.6
8.5
8.5
8.5
TOTAL
WATTS
EER
19,813
21,298
25,146
30,858
8.9
8.8
8.7
8.7
NET COOLING
CAPACITY
(Btuh)
176,000
188,000
220,000
268,000
LEGEND
Sound Levels (1 bel = 10 decibels)
Dry Bulb
Energy Efficiency Ratio
Integrated Part-Load Values
Wet Bulb
*Air Conditioning and Refrigeration Institute.
NOTES:
1. Rated in accordance with ARI Standards 360-89 and 270-89.
2. The 48/50TJ028 is beyond the scope of the ARI Certification Program.
3. ARI ratings are net values, reflecting the effects of circulating fan heat.
4. Ratings are based on:
Cooling Standard: 80 F db, 67 F wb indoor entering-air temperature and 95 F db air entering outdoor unit.
IPLV Standard: 80 F db, 67 F wb indoor entering-air temperature and 80 F db outdoor entering-air temperature.
6
SOUND
RATING
(Bels)
8.8
8.8
9.5
9.5
SOUND
RATING
(Bels)
8.8
8.8
9.5
9.5
SOUND
RATING
(Bels)
8.8
8.8
9.5
9.5
IPLV
9.3
9.5
8.7
9.2
IPLV
9.3
9.3
8.5
8.9
IPLV
9.6
9.8
8.9
9.3
ARI HEATING CAPACITIES AND EFFICIENCIES — 48TJ016-028
HEATING INPUT
(Btuh)
Stage 2/Stage 1*
230,000/172,000
300,000/225,000
275,000/206,000
360,000/270,000
275,000/206,000
360,000/270,000
275,000/206,000
360,000/270,000
UNIT
48TJ
D016
F016
D020
F020
D024
F024
D028
F028
OUTPUT CAPACITY
(Btuh)
TEMPERATURE
RISE (F)
STEADY-STATE
EFFICIENCY (%)
MINIMUM
HEATING CFM
186,000
243,000
223,000
292,000
223,000
292,000
223,000
292,000
15-45
30-60
15-45
20-50
15-45
20-50
15-45
20-50
81.0
81.0
81.0
81.0
81.0
81.0
81.0
81.0
3800
3800
4750
5450
4750
5450
4750
5450
*All units are 2-stage heat.
NOTE: Minimum allowable temperature of mixed-air entering the heat exchanger during first-stage
heating is 45 F. There is no minimum mixed-air temperature limitation during second-stage heating.
For entering-air temperatures below 45 F both stages of heat must be energized together to minimize
condensation issues and ensure proper unit operation.
AIR QUANTITY LIMITS
UNIT 48/50TJ
016
020
024
028
MINIMUM CFM
4500
5400
6000
7000
MAXIMUM CFM
7,500
9,000
10,000
11,250
ELECTRIC RESISTANCE HEATER DATA — 50TJ016-028
UNIT
50TJ
208
26
42
56
26
42
56
26
42
56
26
42
56
016
020
024
028
HEATER kW
Unit Voltages
230
380
460
34
20.3
32
56
34.5
55
75
—
80
34
20.3
32
56
34.5
55
75
—
80
34
20.3
32
56
34.5
55
75
—
80
34
20.3
32
56
34.5
55
75
—
80
575
—
—
50
—
—
—
—
—
—
—
—
—
HEATER
STAGES
HEAT
PER STAGE
MAXIMUM
STAGES*
2
2
2
2
2
2
2
2
2
2
2
2
50/50
33/67
50/50
50/50
33/67
50/50
50/50
33/67
50/50
50/50
33/67
50/50
2
3
4
2
3
4
2
3
4
2
3
4
MINIMUM
HEATING CFM
Cfm
L/s
4500
2124
5400
2549
6000
2832
7000
3304
*Maximum number of stages using accessory low-ambient kit or head pressure control device and
low-ambient kit.
NOTE: Heaters are rated at 240, 480, and 600v. Use the Multiplication Factors table below to determine heater capacity for your particular voltage.
MULTIPLICATION FACTORS
HEATER RATING
VOLTAGE
240
480
600
200
0.694
—
—
208
0.751
—
—
230
0.918
—
—
ACTUAL HEATER VOLTAGE VOLTAGE
240
380
440
460
480
1.000
—
—
—
—
—
0.626
0.840
0.918
1.000
—
—
—
—
—
550
—
—
0.840
575
—
—
0.918
600
—
—
1.000
NOTE: The following equation converts kW of heat energy to Btuh: kW x 3.413 = Btuh.
EXAMPLE: 26.0 kW (at 240 v) heater on 208 v
= 26.0 (.751 mult factor)
= 19.5 kW capacity at 208 v.
7
Physical data (gas heating units)
UNIT 48TJ
016D/F
208/230, 460 v
575 v
15
NOMINAL CAPACITY (tons)
OPERATING WEIGHT
COMPRESSOR/MANUFACTURER
Quantity ... Model (Ckt 1 , Ckt 2)
2...ZR94KC
Number of Refrigerant Circuits
Oil (oz) (Ckt 1 , Ckt 2)
REFRIGERANT TYPE
Expansion Device
Operating Charge (lb-oz)
Circuit 1 *
Circuit 2
CONDENSER COIL
2
81, 81
Rows...Fins/in.
Total Face Area (sq ft)
EVAPORATOR FAN
Quantity...Size (in.)
Type Drive
Nominal Cfm
Motor Hp
Motor Nominal Rpm
Maximum Continuous Bhp
Motor Bearing Type
Maximum Allowable Rpm
Motor Pulley Pitch Diameter
Min/Max (in.)
Nominal Motor Shaft Diameter (in.)
Fan Pulley Pitch Diameter (in.)
Nominal Fan Shaft Diameter (in.)
Belt, Quantity...Type...Length (in.)
Low-Medium Static
High Static
Low-Medium Static
High Static
Low-Medium Static
High Static
Low-Medium Static
High Static
Pulley Center Line Distance (in.)
Speed Change per Full Turn of
Low-Medium Static
Movable Pulley Flange (rpm)
High Static
Movable Pulley Maximum Full Turns
From Closed Position
Factory Speed
Factory Speed Setting (rpm)
Low-Medium Static
High Static
Fan Shaft Diameter at Pulley (in.)
18
20
For Operating Weights see page 12.
Scroll/Copeland
1...ZR108KC,
1...ZR125KC,
1...ZR94KC
1...ZR108KC
2
2
106,81
106, 106
R-22
TXV
028D/F
25
1...ZR16M3,
1...ZR125KC
2
136, 106
15-5
16-0
20-13
12-3
13-6
13- 0
Cross-Hatched 3⁄8-in. Copper Tubes, Aluminum Lanced,
Aluminum Pre-Coated, or Copper Plate Fins
2...17
3...15
3...15
4...15
21.7
21.7
21.7
21.7
Propeller Type
10,500
10,500
14,200
14,200
3...22
3...22
2...30
2...30
1⁄2...1050
1⁄2...1050
1...1075
1...1075
1100
1100
3400
3400
Cross-Hatched 3⁄8-in. Copper Tubes, Aluminum Lanced or
Copper Plate Fins, Face Split
2...17
3...15
3...15
4...15
17.5
17.5
17.5
17.5
Centrifugal Type
2...10 x 10
2...10 x 10
2...12 x 12
2...12 x 12
2...12 x 12
Belt
Belt
Belt
Belt
Belt
6000
6000
7200
8000
10,000
3.7
3.0
5
7.5
10
1725
1725
1745
1745
1740
8.7 [208/230, 575 v] 10.2 [208/230, 575 v]
4.25
3.45
5.90
9.5 [380, 460 v]
11.8 [380, 460 v]
56H
56H
184T
213T
215T
—
—
—
—
—
891-1179
1159-1429
910-1095
1002-1225
1066-1283
1227-1550
—
1069-1287
1193-1458
1332-1550
Ball
Ball
Ball
Ball
Ball
1550
1550
1550
1550
1550
3.1/4.1
4.3/5.3
4.9/5.9
5.4/6.6
4.9/5.9
3.7/4.7
—
4.9/5.9
5.4/6.6
4.9/5.9
7⁄8
1
3
7 ⁄8
1 ⁄8
1 ⁄8
13⁄8
6.0
6.4
9.4
9.4
8.0
5.2
—
8.0
7.9
6.4
13⁄16
13⁄16
17⁄16
17⁄16
17⁄16
1...BX...42
1...BX...45
1...BX...50
1...BX...53
2...BX...50
1...BX...42
—
1...BX...48
1...BX...50
2...BX...47
13.5-15.5
13.5-15.5
13.3-14.8
14.6-15.4
14.6-15.4
48
44
37
37
36
55
—
34
44
45
5
5
5
5
5
3.5
1035
1389
13⁄16
3.5
1296
—
13⁄16
3.5
1002
1178
17⁄16
LEGEND
Bhp — Brake Horsepower
TXV — Thermostatic Expansion Valve
*Circuit 1 uses the lower portion of the condenser coil and lower portion of the evaporator coils; and
Circuit 2 uses the upper portion of both coils.
†Rollout switch is manual reset.
**The 48TJ028 unit requires 2-in. industrial-grade filters capable of handling face velocities up to 625 ft/min
(such as American Air Filter no. 5700 or equivalent).
NOTE: The 48TJ016-028 units have a low-pressure switch (standard) located on the suction side.
8
024D/F
10-10
10-10
Rows...Fins/in.
Total Face Area (sq ft)
CONDENSER FAN
Nominal Cfm
Quantity...Diameter (in.)
Motor Hp...Rpm
Watts Input (Total)
EVAPORATOR COIL
Motor Frame Size
Nominal Rpm High/Low
Fan Rpm Range
020D/F
3.5
1120
1328
17⁄16
3.5
1182
1470
17⁄16
UNIT 48TJ
FURNACE SECTION
Rollout Switch Cutout Temp (F)†
Burner Orifice Diameter (in. ...drill size)
Natural Gas
Thermostat Heat Anticipator Setting (amps)
208/230, 575 v Stage 1
Stage 2
460 v
Stage 1
Stage 2
Gas Input
Stage 1
Stage 2
Efficiency (Steady-State) (%)
Temperature Rise Range
Manifold Pressure (in. wg)
Natural Gas
Gas Valve Quantity
Gas Valve Pressure Range
in. wg
psig
Field Gas Connection Size (in.-FPT)
HIGH-PRESSURE SWITCH (psig)
Cutout
Reset (Auto)
LOW-PRESSURE SWITCH (psig)
Cutout
Reset (Auto)
FREEZE PROTECTION THERMOSTAT (F)
Opens
Closes
OUTDOOR-AIR INLET SCREENS
Quantity...Size (in.)
RETURN-AIR FILTERS
Quantity...Size (in.)
POWER EXHAUST
016D/F
020D/F
024D/F
028D/F
190
190
190
190
0.1285...30/0.136...29
0.1285...30/0.136...29
0.1285...30/0.136...29
0.1285...30/0.136...29
0.98
0.44
0.80
0.44
172,000/225,000
230,000/300,000
81
15-45/30-60
0.98
0.44
0.80
0.44
206,000/270,000
275,000/360,000
81
15-45/20-50
0.98
0.44
0.80
0.44
206,000/270,000
275,000/360,000
81
15-45/20-50
0.98
0.44
0.80
0.44
206,000/270,000
275,000/360,000
81
15-45/20-50
3.3
1
3.3
1
3.3
1
3.3
1
5.5-13.5
0.235-0.487
3 ⁄4
5.5-13.5
0.235-0.487
3 ⁄4
5.5-13.5
0.235-0.487
3⁄4
5.5-13.5
0.235-0.487
3 ⁄4
426
320
27
44
30 ± 5
45 ± 5
Cleanable
2...20 X 25 X 1
1...20 X 20 X 1
Throwaway**
4...20 x 20 x 2
4...16 x 20 x 2
1⁄2 Hp, 208/230-460 v Motor Direct Drive, Propeller-Fan (Factory-Wired for 460 v)
LEGEND
Bhp — Brake Horsepower
TXV — Thermostatic Expansion Valve
*Circuit 1 uses the lower portion of the condenser coil and lower portion of the evaporator coils; and Circuit
2 uses the upper portion of both coils.
†Rollout switch is manual reset.
**The 48TJ028 unit requires 2-in. industrial-grade filters capable of handling face velocities up to 625 ft/min
(such as American Air Filter no. 5700 or equivalent).
NOTE: The 48TJ016-028 units have a low-pressure switch (standard) located on the suction side.
9
Physical data (electric heating units)
— English
UNIT 50TJ
016
208/230, 380, 460 v
15
NOMINAL CAPACITY (tons)
OPERATING WEIGHT
COMPRESSOR/MANUFACTURER
Quantity...Model (Ckt 1 , Ckt 2)
2...ZR94KC
2
81, 81
Number of Refrigerant Circuits
Oil (oz) (Ckt 1 , Ckt 2)
REFRIGERANT TYPE
Expansion Device
Operating Charge (lb-oz)
Circuit 1*
Circuit 2
CONDENSER COIL
Motor Bearing Type
Maximum Allowable Rpm
Motor Pulley Pitch Diameter
Min/Max (in.)
Nominal Motor Shaft Diameter (in.)
Fan Pulley Pitch Diameter (in.)
Nominal Fan Shaft Diameter (in.)
Belt, Quantity...Type...Length (in.)
Pulley Center Line Distance (in.)
Speed Change per Full Turn of
Movable Pulley Flange (rpm)
Movable Pulley Maximum Full Turns
From Closed Position
Factory Speed
Factory Speed Setting (rpm)
Fan Shaft Diameter at Pulley (in.)
HIGH-PRESSURE SWITCH (psig)
Cutout
Reset (Auto)
LOW-PRESSURE SWITCH (psig)
Cutout
Reset (Auto)
FREEZE PROTECTION THERMOSTAT (F)
Opens
Closes
OUTDOOR-AIR INLET SCREENS
Quantity...Size (in.)
RETURN-AIR FILTERS
Quantity...Size (in.)
POWER EXHAUST
020
028
25
1...ZR16M3,
1...ZR125KC
2
136, 106
Low-Medium Static
High Static
Low-Medium Static
High Static
Low-Medium Static
High Static
Low-Medium Static
High Static
Low-Medium Static
High Static
Low-Medium Static
High Static
15-5
16-0
20-13
12-3
13-6
13- 0
Cross-Hatched 3⁄8-in. Copper Tubes, Aluminum Lanced,
Aluminum Pre-Coated, or Copper Plate Fins
2...17
3...15
3...15
4...15
21.7
21.7
21.7
21.7
Propeller Type
10,500
10,500
14,200
14,200
3...22
3...22
2...30
2...30
1⁄2...1050
1⁄2...1050
1...1075
1...1075
1100
1100
3400
3400
Cross-Hatched 3⁄8-in. Copper Tubes, Aluminum Lanced or
Copper Plate Fins, Face Split
2...17
3...15
3...15
4...15
17.5
17.5
17.5
17.5
Centrifugal Type
2...10 x 10
2...10 x 10
2...12 x 12
2...12 x 12
2...12 x 12
Belt
Belt
Belt
Belt
Belt
6000
6000
7200
8000
10,000
3.7
3.0
5
7.5
10
1725
1725
1745
1745
1740
8.7 [208/230, 575 v] 10.2 [208/230, 575 v]
4.25
3.45
5.90
9.5 [380, 460 v]
11.8 [380, 460 v]
56H
56H
184T
213T
215T
—
—
—
—
—
891-1179
1159-1429
910-1095
1002-1225
1066-1283
1227-1550
—
1069-1287
1193-1458
1332-1550
Ball
Ball
Ball
Ball
Ball
1550
1550
1550
1550
1550
3.1/4.1
4.3/5.3
4.9/5.9
5.4/6.6
4.9/5.9
3.7/4.7
—
4.9/5.9
5.4/6.6
4.9/5.9
7⁄8
7⁄8
11⁄8
13⁄8
13⁄8
6.0
6.4
9.4
9.4
8.0
5.2
—
8.0
7.9
6.4
3
3
7
7
1 ⁄16
1 ⁄16
1 ⁄16
17⁄16
1 ⁄16
1...BX...42
1...BX...45
1...BX...50
1...BX...53
2...BX...50
1...BX...42
—
1...BX...48
1...BX...50
2...BX...47
13.5-15.5
13.5-15.5
13.3-14.8
14.6-15.4
14.6-15.4
48
44
37
37
36
55
—
34
44
45
5
5
5
5
5
3.5
3.5
3.5
3.5
3.5
1035
1296
1002
1120
1182
1389
—
1178
1328
1470
3
3
7
7
1 ⁄16
1 ⁄16
1 ⁄16
17⁄16
1 ⁄16
426
320
27
44
30 ± 5
45 ± 5
Cleanable
2...20 X 25 X 1
1...20 X 20 X 1
Throwaway†
...]20 x 20 x 2
4...16 x 20 x 2
1⁄2 Hp, 208/230-460 v Motor Direct Drive, Propeller-Fan (Factory-Wired for 460 v)
LEGEND
Bhp — Brake Horsepower
TXV — Thermostatic Expansion Valve
*Circuit 1 uses the lower portion of the condenser coil and lower portion of the evaporator coils; and
Circuit 2 uses the upper portion of both coils.
†The 50TJ028 unit requires 2-in. industrial-grade filters capable of handling face velocities up to 625 ft/min
(such as American Air Filter no. 5700 or equivalent).
NOTE: The 50TJ016-028 units have a low-pressure switch (standard) located on the suction side.
10
024
18
20
For Operating Weights see page 12.
Scroll/Copeland
1...ZR108KC,
1...ZR125KC,
1...ZR94KC
1...ZR108KC
2
2
106,81
106, 106
R-22
TXV
10-10
10-10
Rows...Fins/in.
Total Face Area (sq ft)
CONDENSER FAN
Nominal Cfm
Quantity...Diameter (in.)
Motor Hp...Rpm
Watts Input (Total)
EVAPORATOR COIL
Rows...Fins/in.
Total Face Area (sq ft)
EVAPORATOR FAN
Quantity...Size (in.)
Type Drive
Nominal Cfm
Motor Hp
Motor Nominal Rpm
Maximum Continuous Bhp
Motor Frame Size
Nominal Rpm High/Low
Fan Rpm Range
575 v
Physical data (electric heating units)
— SI
UNIT 50TJ
016
208/230, 380, 460 v
51
NOMINAL CAPACITY (kW)
OPERATING WEIGHT
COMPRESSOR/MANUFACTURER
Quantity...Model (Ckt 1 , Ckt 2)
2...ZR94KC
2
2395, 2395
Number of Refrigerant Circuits
Oil (ml) (Ckt 1 , Ckt 2)
REFRIGERANT TYPE
Expansion Device
Operating Charge (kg)
Circuit 1*
Circuit 2
CONDENSER COIL
Motor Bearing Type
Maximum Allowable R/s
Motor Pulley Pitch Diameter
Min/Max (mm)
Nominal Motor Shaft Diameter (mm)
Fan Pulley Pitch Diameter (mm)
Nominal Fan Shaft Diameter (mm)
Belt, Quantity...Type...Length (mm)
Pulley Center Line Distance (mm)
Speed Change per Full Turn of
Movable Pulley Flange (r/s)
Movable Pulley Maximum Full Turns
From Closed Position
Factory Speed
Factory Speed Setting (r/s)
Fan Shaft Diameter at Pulley (mm)
HIGH-PRESSURE SWITCH (kPa)
Cutout
Reset (Auto)
LOW-PRESSURE SWITCH (kPa)
Cutout
Reset (Auto)
FREEZE PROTECTION THERMOSTAT (C)
Opens
Closes
OUTDOOR-AIR INLET SCREENS
Quantity...Size (mm)
RETURN-AIR FILTERS
Quantity...Size (mm)
POWER EXHAUST
020
024
61
68
For Operating Weights see page 12.
Scroll/Copeland
1...ZR108KC,
1...ZR125KC,
1...ZR94KC
1...ZR108KC
2
2
3135, 2395
3135, 3135
R-22
TXV
028
85
1...ZR16M3,
1.ZR125KC
2
4022, 3135
4.8
4.8
Rows...Fins/m
Total Face Area (sq m)
CONDENSER FAN
Nominal L/s
Quantity...Diameter (mm)
Motor BkW...r/s
Watts Input (Total)
EVAPORATOR COIL
Rows...Fins/m
Total Face Area (sq m)
EVAPORATOR FAN
Quantity...Size (mm)
Type Drive
Nominal L/s
Motor BkW
Motor Nominal R/s
Maximum Continuous BkW
Motor Frame Size
Nominal Rpm High/Low
Fan R/s Range
575 v
Low-Medium Static
High Static
Low-Medium Static
High Static
Low-Medium Static
High Static
Low-Medium Static
High Static
Low-Medium Static
High Static
Low-Medium Static
High Static
6.9
7.3
9.4
5.5
6.1
5.9
Cross-Hatched 3⁄8-in. Copper Tubes, Aluminum Lanced,
Aluminum Pre-Coated, or Copper Plate Fins
2...669
3...590
3...590
4...590
2.02
2.02
2.02
2.02
Propeller Type
4956
4956
6700
6700
3...559
3...559
2...762
2...762
0.37...14.3
0.37...14.3
0.75...17.9
0.75...17.9
1100
1100
3400
3400
Cross-Hatched 3⁄8-in. Copper Tubes, Aluminum Lanced or
Copper Plate Fins, Face Split
2...669
3...590
3...590
4...590
1.63
1.63
1.63
1.63
Centrifugal Type
2...254 x 254
2...254 x 254 2...305 x 305
2...305 x 305
2...305 x 305
Belt
Belt
Belt
Belt
Belt
2832
2832
3398
3776
4720
2.76
2.24
3.73
5.59
7.46
28.75
28.75
29.08
29.08
29.00
6.49 [208/230, 575 v] 7.61 (208/230, 575 v]
3.17
2.57
4.40
7.08 [380, 460 v]
8.80 [380, 460 v]
56H
56H
184T
213T
215T
—
—
—
—
—
14.9-19.7
19.3-23.8
15.2-18.3
16.7-20.4
17.8-21.4
20.5-25.8
—
17.8-21.5
19.9-24.3
22.2-25.8
Ball
Ball
Ball
Ball
Ball
25.8
25.8
25.8
25.8
25.8
79/104
109/135
124.5/149.9
137/168
124/150
94/119
—
124.5/149.9
137/168
125/150
22
22
28.6
35
35
152
163
238.8
239
203
132
—
203.2
201
163
30
30
36.5
36.5
36.5
1...BX...1067
1...BX...1143 1...BX...1270
1...BX...1346
2...BX...1270
1...BX...1067
—
1...BX...1219
1...BX...1270
2...BX...1194
343-394
343-394
338-376
371-391
371-391
0.80
0.73
0.62
0.62
0.60
0.92
—
0.57
0.73
0.75
5
5
5
5
5
3.5
3.5
3.5
3.5
3.5
17.3
21.6
16.71
18.7
19.7
23.2
—
19.63
21.1
24.5
30
30
36.5
36.5
36.5
2951
2206
186
303
−1
7
Cleanable
2...508 x 635 x 25
2...508 x 508 x 25
Throwaway†
4...508 x 508 x 50
4...406 x 508 x 50
0.37 kW 208/230-460 v Motor Direct Drive, Propeller-Fan (Factory-Wired for 460 v)
LEGEND
BkW — Brake Kilowatts
TXV — Thermostatic Expansion Valve
*Circuit 1 uses the lower portion of the condenser coil and lower portion of the evaporator coils; and Circuit 2 uses
the upper portion of both coils.
†The 50TJ028 unit requires 2-in. industrial-grade filters capable of handling face velocities up to 3.2 m/s (such as
American Air Filter no. 5700 or equivalent).
NOTE: The 50TJ016-028 units have a low-pressure switch (standard) located on the suction side.
11
Physical data (cont)
OPERATING AND RIGGING WEIGHTS
UNIT
48TJD/F
50TJ
BASE UNIT OPERATING WEIGHTS*
020
024
lb
kg
lb
1800
816
1850
1650
748
1700
016
lb
1700
1550
kg
771
703
028
kg
839
771
lb
2000
1850
kg
907
839
*Base unit weight does not include electric heaters, copper coils, economizer, power exhaust, barometric relief or crating. See Options and Accessories table below for more information.
NOTE: For 016 and 020 unit sizes add 75 lb (34 kg) for domestic crating. For 024 and 028 unit sizes
add 135 lb (61 kg). For export crating add 500 lb (227 kg).
OPTIONS AND ACCESSORIES
(Weight Adders)
OPTION/
ACCESSORY
Barometric Relief Damper
Power Exhaust
Electric Heater*
Economizer
Cu Condenser Coil
Cu Condenser and Evaporator Coils
Roof Curb (14-in. curb)
Horizontal Adapter Curb
LEGEND
Cu — Copper
*Electric heaters are available for 50TJ units only.
12
016
lb
50
85
50
110
150
280
200
250
kg
23
39
23
50
68
127
91
113
OPTION/ACCESSORY WEIGHTS
020
024
lb
kg
lb
kg
50
23
50
23
85
39
85
39
50
23
50
23
110
50
110
50
150
68
150
68
280
127
280
127
200
91
200
91
250
113
250
113
028
lb
50
85
50
110
150
280
200
250
kg
23
39
23
50
68
127
91
113
Options and accessories
ITEM
OPTION* ACCESSORY†
Apollo Direct Digital Communicating Controls
X
Service Option Package
X
Integrated Economizer
X
X
Electric Heat (50TJ016-028)**
X
Enviro-Shield™ Condenser Coil Options
X
Hail Guard Condenser Coil Grille
X
Alternate Drive
X
LP (Liquid Propane) Conversion Kit (48TJ016-028)
X
Electronic Programmable Thermostat
X
25% Open Two-Position Damper
X
Barometric Relief Damper**
X
Roof Curbs
X
Horizontal Adapter Curb
X
Remote Control Panel
X
Thermostats and Subbases
X
Power Exhaust**
X
Low-Ambient Kit
X
Winter Start Time-Delay Relay
X
MotormasterT Head Pressure Control (016,020) (Speed Control)
X
Motormaster III Head Pressure Control (024,028) (Speed Control)
X
Time GuardT II Control Circuit
X
Accusensor™ III Enthalpy Sensor
X
Service Valves
X
Hydronic Glycol Coil (50TJ016-028)
X
*Factory-installed.
†Field-installed.
**Not available with horizontal adapter curb (016-028).
NOTE: Refer to 48/50TJ price pages or contact your local representative for accessory and option
package information.
HEAD PRESSURE CONTROL
The 48/50TJ016-028 standard units are designed to operate in cooling at outdoor temperatures down
to 40 F (4.4 C). With accessory Motormaster control (016,020) (condenser-fan speed modulation), or
Motormaster III control (024,028) (condenser fan speed modulation) units can operate at outdoor temperatures down to −20 F (−28.9 C). The head pressure controls, which mount in the condenser section, control the condenser-fan motor to maintain correct condensing temperature. Refer to Price pages
or contact your local Carrier representative for appropriate accessory combinations for desired outdoor
ambient temperature operation.
MOTORMASTER CONTROL
(016,020)
MOTORMASTER III CONTROL
(024,028)
13
Options and accessories (cont)
FACTORY-INSTALLED APOLLO
COMMUNICATING CONTROLS
ACCUSENSOR™ III
(Enthalpy and Differential Enthalpy Control)
+
The Apollo direct digital controls are designed exclusively by
Carrier, and are used to actively monitor and control all modes
of operation as well as to monitor evaporator-fan status, filter
status, supply-air temperature, outdoor-air temperature, and indoorair quality. They are designed to work in conjunction with Carrier
TEMP and VVTT (Variable Volume/Variable Temperature) system
thermostats.
Accusensor economizer controls help provide efficient, economical
economizer operation. The unit economizer provides the decisionmaking function internally, and requires one Accusensor III sensor
for solid-state enthalpy sensing. A second Accusensor III sensor provides information for comparison of outdoor temperature and humidity to return-air temperature and humidity and determines the most
economical mixture of air (purchased in addition to first solid-state
enthalpy sensor for differential enthalpy sensing for all units).
LIQUID PROPANE (LP) CONVERSION KITS
(48TJ016-028 Only)
ELECTRONIC PROGRAMMABLE
THERMOSTAT
The LP conversion kit allows the unit to utilize a liquid propane fuel
supply in areas where natural gas is unavailable, and permits the
unit to be converted from natural gs to LP gas use. The kit contains
the orifices required for LP operation.
CARRIER COMMERCIAL THERMOSTAT
Carrier’s electronic programmable thermostat provides efficient temperature control by allowing you to program heating and cooling setbacks and set ups with provisions for weekends and holidays. Accessory remote sensing package is also available to provide tamperproof
control in high traffic spaces. Used in conjunction with factory-installed
Apollo control, this thermostat provides a 5-minute recycle timer between modes of operation for short-cycle protection.
TIME GUARDt II CONTROL
Time Guard II Control automatically prevents compressor from restarting for at least 5 minutes after a shutdown. Accessory prevents
short cycling of compressor if thermostat is changed rapidly. Time
Guard II control mounts in the control compartment of unit.
14
Designed specifically for use with Carrier commercial systems, this
Carrier programmable thermostat features LED occupied/unoccupied
displays and setback mode which can override continuous fan
operation.
ELECTRRIC HEATERS
(50TJ016-028 Only)
BAROMETRIC RELIEF/POWER EXHAUST
Electric heaters (and single point kits) are available in a wide range
of capacities for factory or field installation.
When used with accessory/optional economizer, the barometric relief or power exhaust accessory helps to relieve building
overpressurization.
NOTE: This is not available with horizontal supply adapter curb.
GLYCOL COIL
(50TJ016-028 Only)
CARRIER DEBONAIR THERMOSTAT
Carrier
®
Pm
COOL
AUTO
HEAT
Glycol coil is intended for add-on type applications or new work where
a boiler system is available. Glycol coil and electric heat cannot be
installed together.
Carrier’s Debonair line of commercial programmable thermostats are
wall-mounted, low-voltage thermostats which maintain room temperature by controlling operation of an HVAC (Heating, Ventilation,
and Air-Conditioning) system. Separate heating and cooling set points
and autochangeover capability allow occupied and unoccupied programming for energy savings.
ENVIRO-SHIELD™ CONDENSER COIL OPTIONS
Condenser coil options are available to match coil construction to site conditions for the best corrosion durability.
Pre-coated coils provide protections in mild coastal environments. All copper coils are best suited for moderate
coastal applications, while post-coated coils provide superior protection in severe coastal and industrial applications.
CONDENSER COIL PROTECTION APPLICATIONS
DESCRIPTION
(Enviro-Shield Option)
Standard, Al/Cu
Pre-Coated Al/Cu
Cu/Cu
Post-Coated Al/Cu
Post-Coated Cu/Cu
Standard,
Non-Corrosive
X
Mild
Coastal
ENVIRONMENT*
Moderate
Severe
Coastal
Coastal
Industrial
Combined Coastal
and Industrial
X
X
X
X
X
LEGEND
Al/Cu
— Aluminum Fin with Copper Tube Coil
Cu/Cu
— Copper Fin with Copper Tube Coil
Enviro-Shield — Family of Coil Protection Options
Post-Coated — Organic Coating applied to Entire Coil Assembly
Pre-Coated
— Epoxy Coating Applied to Fin Stock Material
*See ‘‘Selection Guide: Environmental Corrosion Protection’’ Catalog No. 811-839 for more information.
15
Options and accessories (cont)
SERVICE OPTION PACKAGE
UNIT MOUNTED DISCONNECT HINGED ACCESS PANEL (CONTROL BOX SHOWN)
Factory-installed, internally-mounted, NEC (National Electrical Code)
and UL (Underwriters’ Laboratories) approved non-fused switch provides unit power shutoff with disconnect lockout protection capability. The control box access door is interlocked with the non-fused
disconnect. The non-fused disconnect must be in the OFF position
to open this door. The switch is accessible from outside the unit.
CONVENIENCE OUTLET
Factory-installed, internally mounted and externally accessible 115-v
female receptacle. Includes 15-amp GFI (Ground Fault Interrupter)
receptacle with independent fuse protection. Voltage required to operate convenience outlet is provided by a field-installed transformer.
16
Lb
110
110
48TJD, 1700 771
TJF016
48TJD,
TJF020 1800 816
Lb
50
50
Kg
Kg
Lb
Kg
Lb
Kg
Lb
Kg
DIM A
3-2
3-3
965
991
Direction of airflow.
DIM C
1067
1-8
1041 1-10
508
559
ft-in. mm
5. Ductwork to be attached to accessory roof curb only.
6. Minimum clearance:
• Rear: 78-09 (2134) for coil removal. This dimension can be reduced to
48-09 (1219) if conditions permit coil removal from the top.
• 48-09 (1219) to combustible surfaces, all four sides (includes between
units).
• Left side: 48-09 (1219) for proper condenser coil airflow.
• Front: 48-09 (1219) for control box access.
• Right side: 48-09 (1219) for proper operation of damper and power
exhaust if so equipped.
• Top: 68-09 (1829) to assure proper condenser fan operation.
• Bottom: 149 (356) to combustible surfaces (when not using curb).
• Control box side: 38-09 (914) to ungrounded surfaces, non-combustible.
• Control box side: 38-69 (1067) to block or concrete walls, or other grounded
surfaces.
• Local codes or jurisdiction may prevail.
7. With the exception of clearance for the condenser coil and the damper/
power exhaust as stated in Note no. 6, a removable fence or barricade
requires no clearance.
8. Dimensions are from outside of corner post. Allow 08-5⁄169 (8) on each side
for top cover drip edge.
9. See page 23 for service option details.
4.
3-6
3-5
mm
DIM B
ft-in. mm ft-in.
NOTES:
1. Refer to print for roof curb accessory dimensions.
2. Dimensions in ( ) are in millimeters.
3.
Center of Gravity.
422 192 397 180 452 205 503 228
411 186 381 173 438 199 471 213
Lb
STD UNIT ECONOMIZER CORNER CORNER CORNER CORNER
WEIGHT
WEIGHT
A
B
C
D
Kg
UNIT
Base unit dimensions — 48TJ016,020
17
18
Lb
110
110
48TJD,
TJF024 1850 839
48TJD,
TJF028 2000 907
Lb
50
50
Kg
Kg
Lb
Kg
Lb
Kg
Lb
Kg
DIM A
3-1
3-2
940
965
Direction of airflow.
1092
1041
DIM C
1-8
1-8
508
508
ft-in. mm
5. Ductwork to be attached to accessory roof curb only.
6. Minimum clearance:
• Rear: 78-09 (2134) for coil removal. This dimension can be reduced to 48-09
(1219) if conditions permit coil removal from the top.
• 48-09 (1219) to combustible surfaces, all four sides (includes between units).
• Left side: 48-09 (1219) for proper condenser coil airflow.
• Front: 48-09 (1219) for control box access.
• Right side: 48-09 (1219) for proper operation of damper and power exhaust if
so equipped.
• Top: 68-09 (1829) to assure proper condenser fan operation.
• Bottom: 149 (356) to combustible surfaces (when not using curb).
• Control box side: 38-09 (914) to ungrounded surfaces, non-combustible.
• Control box side: 38-69 (1067) to block or concrete walls, or other grounded
surfaces.
• Local codes or jurisdiction may prevail.
7. With the exception of clearance for the condenser coil and the damper/power
exhaust as stated in Note no. 6, a removable fence or barricade requires no
clearance.
8. Dimensions are from outside of corner post. Allow 08-5⁄169 (8) on each side for
top cover drip edge.
9. See page 23 for service option details.
4.
3-7
3-5
mm
DIM B
ft-in. mm ft-in.
NOTES:
1. Refer to print for roof curb accessory dimensions.
2. Dimensions in ( ) are in millimeters.
3.
Center of Gravity.
451 204 426 193 562 255 562 255
441 200 408 185 474 215 526 239
Lb
STD UNIT ECONOMIZER CORNER CORNER CORNER CORNER
WEIGHT
WEIGHT
A
B
C
D
Kg
UNIT
Base unit dimensions — 48TJ024,028
1550
1650
50TJ020
Lb
748
703
Kg
STD UNIT
WEIGHT
50TJ016
UNIT
110
110
Lb
50
50
Kg
ECONOMIZER
WEIGHT
181
177
Kg
384
365
Lb
174
166
Kg
CORNER
B
402
384
Lb
182
174
Kg
CORNER
C
439
410
Lb
199
186
Kg
CORNER
D
3-4
3-5
1016
1041
mm
DIM A
ft-in.
Direction of airflow.
3-6
3-6
1067
1067
mm
DIM B
ft-in.
1- 8
1-10
508
559
mm
DIM C
ft-in.
5. Ductwork to be attached to accessory roof curb only.
6. Minimum clearance:
• Rear: 78-09 (2134) for coil removal. This dimension can be reduced to 48-09
(1219) if conditions permit coil removal from the top.
• Left side: 48-09 (1219) for proper condenser coil airflow.
• Front: 48-09 (1219) for control box access.
• Right side: 48-09 (1219) for proper operation of damper and power exhaust if
so equipped.
• Top: 68-09 (1829) to assure proper condenser fan operation.
• Local codes or jurisdiction may prevail.
7. With the exception of clearance for the condenser coil and the damper/power
exhaust as stated in Note no. 6, a removable fence or barricade requires no
clearance.
8. Dimensions are from outside of corner post. Allow 08-5⁄169 (8) on each side for
top cover drip edge.
9. See page 23 for service option details.
4.
NOTES:
1. Refer to print for roof curb accessory dimensions.
2. Dimensions in ( ) are in millimeters.
3.
Center of Gravity.
399
391
Lb
CORNER
A
Base unit dimensions — 50TJ016,020
19
20
Lb
110
110
50TJ024 1700 771
50TJ028 1850 839
Lb
50
50
Kg
Kg
Lb
Kg
Lb
Kg
Lb
Kg
3-4
3-2
965
1016
mm
DIM A
ft-in.
Direction of airflow.
3-7
3-5
1092
1041
mm
DIM B
ft-in.
DIM C
1-8
1-8
508
508
ft-in. mm
5. Ductwork to be attached to accessory roof curb only.
6. Minimum clearance:
• Rear: 78-09 (2134) for coil removal. This dimension can be reduced to 48-09
(1219) if conditions permit coil removal from the top.
• Left side: 48-09 (1219) for proper condenser coil airflow.
• Front: 48-09 (1219) for control box access.
• Right side: 48-09 (1219) for proper operation of damper and power exhaust if
so equipped.
• Top: 68-09 (1829) to assure proper condenser fan operation.
• Local codes or jurisdiction may prevail.
7. With the exception of clearance for the condenser coil and the damper/power
exhaust as stated in Note no. 6, a removable fence or barricade requires no
clearance.
8. Dimensions are from outside of corner post. Allow 08-5⁄169 (8) on each side for
top cover drip edge.
9. See page 23 for service option details.
4.
NOTES:
1. Refer to print for roof curb accessory dimensions.
2. Dimensions in ( ) are in millimeters.
3.
Center of Gravity.
428 194 412 187 511 232 499 226
419 190 394 179 425 193 463 210
Lb
STD UNIT ECONOMIZER CORNER CORNER CORNER CORNER
WEIGHT
WEIGHT
A
B
C
D
Kg
UNIT
Base unit dimensions — 50TJ024,028
Accessory dimensions
HORIZONTAL AND VERTICAL ROOF CURBS AND HORIZONTAL ADAPTER CURB
NOTES:
1. Roof curb accessory is shipped unassembled.
2. Insulated panels, 19 thick neoprene coated, 11⁄2 lb density.
3. Dimensions in ( ) are in millimeters.
4.
NOTE: To prevent the hazard of stagnant water build-up in
the drain pan of the indoor section, unit can only be pitched
as shown.
Direction of airflow.
LEGEND
COMPR SECT. — Compressor Section
5. Roof curb: 16 ga. (VA03-56) steel.
PKG. NO. REF.
50PQ900221
CURB
HEIGHT
18-29
(305)
50PQ900141
28-09
(610)
50PQ900151
28-09
(610)
DESCRIPTION
Standard curb
149 high
Standard curb for
units requiring
high installation
Side supply and
return curb for
high installation
DIMENSIONS (degrees and inches)
UNIT
48/50TJ
A
DEG.
.28
B
IN.
.45
DEG.
.28
IN.
.43
UNIT LEVELING TOLERANCES*
*From edge of unit to horizontal.
21
Accessory dimensions (cont)
HORIZONTAL SUPPLY/RETURN ADAPTER INSTALLATION
NOTE: 50DP900211 is a fully factory preassembled horizontal adapter and includes an insulated high static regain transition duct which substantially improves fan static performance.
The Barometric Relief Damper and Power Exhaust accessories are not available with the horizontal adapter.
ACCESSORY
PACKAGE NO.
50DP900211
BAROMETRIC RELIEF/POWER EXHAUST
2'-1 5/8"
2'-2 1/16"
1'-6 5/16"
22
CURB
HEIGHT
18-119
(584)
DESCRIPTION
Pre-Assembled, High Static,
Horizontal Adapter
FACTORY-INSTALLED CONVENIENCE OUTLET
LEGEND
K.O. — Knockout
FACTORY-INSTALLED NON-FUSED DISCONNECT
COMPRESSOR
SECTION DOOR
TOP
CONTROL BOX
SECTION DOOR
DISCONNECT
HANDLE
2'-5 1/4"
(743)
FRONT VIEW
1'-1 11/16" (347)
23
Selection procedure
(with 48TJF016 example)
I Determine cooling and heating requirements at
design conditions.
Given:
Required Cooling Capacity . . . . . . . . . 170,000 Btuh
Sensible Heat Capacity . . . . . . . . . . . . 111,000 Btuh
Required Heating Capacity . . . . . . . . . 200,000 Btuh
Condenser Entering Air Temp . . . . . 95 F (Summer)
Evaporator Entering Air Temp . . . . . . . . . . 80 F edb,
67 F ewb
Evaporator Air Quantity . . . . . . . . . . . . . . 4,500 cfm
External Static Pressure . . . . . . . . . . . . . . . 0.6 in. wg
Electrical Characteristics (V-Ph-Hz) . . . . . . 460-3-60
Vertical discharge unit with optional economizer
required.
edb — Entering dry-bulb
ewb — Entering wet-bulb
II Select unit based on required cooling capacity.
Enter Cooling Capacities table for 48TJ016 (page 25)
at condenser entering temperature 95 F, evaporator
air entering at 4,500 cfm and 67 F wb. The 48TJF016
unit will provide a total cooling capacity of 178,000 Btuh
and a sensible heating capacity of 117,000 Btuh. For
air entering evaporator at temperatures other than
80 F edb, calculate sensible heat capacity correction
as required using the formula in the notes following the
Cooling Capacities tables.
NOTE: Unit ratings are gross capacities and do not include the effect of evaporator-fan motor heat. To calculate net capacities, see Step V.
III Select heating capacity of unit to provide design
condition requirements.
In the ARI Heating Capacities and Efficiencies table
(page 7) note that the 48TJF016 will provide an output capacity of 243,000 Btuh, which is adequate for
the given application.
24
IV Determine fan speed and power requirements
at design conditions.
Before entering the Fan Performance tables, calculate the total static pressure required based on unit
components. From the given and the Accessory/FIOP
Static Pressure and Gas Heat Fan Performance Loss
tables on pages 37 and 30 find:
External static pressure
0.60 in. wg
Economizer static pressure
0.04 in. wg
48TJ016F static pressure drop 0.17 in. wg
Total static pressure
0.81 in. wg
Enter the Fan Performance table 48TJ016 (page 30)
at 4,500 cfm and 0.81 in. wg external static pressure.
By interpolation, find that the rpm is 981 and the watts
are 1661.
V Determine net cooling capacity.
Cooling capacities are gross capacities and do not include indoor (evaporator) fan motor (IFM) heat. Use
the watts input power to the motor calculated in Section IV above.
IFM Watts = 1661
Determine net cooling capacity using the following
formula:
Net capacity = Gross capacity – IFM heat
= 178,000 Btuh – 1661 Watts
(3.412 Btuh )
Watts
= 178,000 Btuh – 5667 Btuh
= 172,333 Btuh
Net sensible capacity = 117,000 Btuh – 5667 Btuh
= 111,333 Btuh
The calculations show that a 48TJF016 unit with the
standard motor and standard low-medium static drive
is the correct selection for the given conditions.
Performance data
COOLING CAPACITIES — ENGLISH
48/50TJ016 (15 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
75
85
95
105
115
118
120
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
4500/0.10
62
177
146
14.0
170
142
15.2
163
139
16.4
155
135
17.6
148
131
19.0
145
130
19.4
144
129
19.6
67
193
124
14.4
186
120
15.6
178
117
16.9
170
114
18.2
162
111
19.5
159
110
19.9
157
109
20.2
5250/0.12
72
212
100
15.0
204
98
16.1
195
94
17.4
186
91
18.7
176
88
20.0
173
87
20.4
171
86
20.6
62
181
157
14.2
174
152
15.3
167
148
16.6
159
144
17.8
151
140
19.1
148
139
19.5
147
139
19.8
67
197
132
14.6
190
129
15.8
182
126
17.0
174
122
18.3
165
118
19.7
162
117
20.0
160
116
20.2
Evaporator Air Quantity — Cfm/BF
6000/0.14
6750/0.15
Evaporator Air — Ewb (F)
72
62
67
72
62
67
72
216
184
202
220
188
204
224
105
169
140
111
176
147
116
15.1
14.3
14.7
15.2
14.4
14.9
15.4
208
178
194
212
181
197
216
102
163
137
107
172
144
112
16.3
15.5
15.9
16.5
15.6
16.1
16.6
200
170
186
204
173
189
206
100
158
133
104
168
141
109
17.6
16.7
17.2
17.7
16.8
17.3
17.8
190
162
177
193
165
179
196
96
155
130
101
163
137
105
18.8
17.9
18.5
18.9
18.1
18.5
19.1
180
153
167
183
157
169
185
93
150
126
97
156
133
102
20.2
19.2
19.8
20.2
19.4
19.9
20.4
177
151
164
179
154
166
182
92
148
125
96
154
131
100
20.6
19.6
20.2
20.6
19.8
20.2
20.8
—
149
162
—
153
164
—
—
147
124
—
153
130
—
—
19.9
20.4
—
20.0
20.4
—
7500/0.16
62
190.2
185
14.5
183
180
15.7
175
175
16.9
168
168
18.2
160
160
19.5
158
158
19.9
156
156
20.2
67
206
157
14.9
199
151
16.1
190
147
17.4
181
143
18.6
171
140
19.9
168
138
20.4
166
137
20.6
72
226
120
15.4
218
117
16.7
208
113
17.9
197
109
19.1
187
106
20.4
183
105
20.8
—
—
—
48/50TJ020 (18 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
75
85
95
105
115
117
120
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
5400/0.095
62
191
165
14.6
184
161
15.8
176
158
17.0
168
154
18.3
160
150
19.6
158
149
19.9
155
147
20.3
67
211
138
15.2
202
135
16.3
194
132
17.5
185
128
18.8
176
125
20.1
174
124
20.4
171
123
20.9
6000/0.105
72
231
111
15.7
224
108
16.9
214
105
18.2
204
102
19.4
194
99
20.7
192
98
21.1
—
—
—
62
194
173
14.7
187
170
15.9
179
166
17.1
171
162
18.4
162
157
19.8
160
156
20.0
158
155
20.5
67
213
145
15.3
206
142
16.5
196
138
17.7
187
135
18.9
177
131
20.3
175
130
20.5
172
129
20.9
Evaporator Air Quantity — Cfm/BF
7000/0.120
8000/0.140
Evaporator Air — Ewb (F)
72
62
67
72
62
67
235
198
218
239
202
221
115
187
155
121
199
166
15.9
14.9
15.4
16.0
15.1
15.6
226
191
209
231
194
213
112
183
152
119
194
162
17.1
16.1
16.6
17.2
16.3
16.8
217
183
200
222
187
203
109
178
149
115
187
159
18.3
17.3
17.8
18.5
17.5
18.0
207
174
191
209
180
193
106
174
145
112
179
154
19.6
18.6
19.1
19.7
18.8
19.2
196
167
180
198
172
182
102
167
141
108
172
151
20.9
20.0
20.4
21.0
20.2
20.5
194
165
178
196
170
180
101
165
140
107
170
150
21.1
20.3
20.7
21.3
20.5
20.7
—
163
175
—
168
177
—
162
139
—
167
149
—
20.7
21.1
—
20.9
21.1
9000/0.150
72
243
128
16.2
234
125
17.4
224
121
18.6
213
118
19.9
200
114
21.1
198
113
21.4
—
—
—
62
206.6
206
15.2
199
199
16.4
192
192
17.7
184
184
19.0
176
176
20.3
174
174
20.7
172
171
21.1
67
223
175
15.7
215
172
16.9
205
168
18.1
194
164
19.3
183
160
20.5
181
159
20.9
178
157
21.2
72
245
133
16.3
237
131
17.5
226
128
18.7
215
124
19.9
203
120
21.2
200
119
21.5
—
—
—
25
Performance data (cont)
COOLING CAPACITIES — ENGLISH (cont)
48/50TJ024 (20 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
75
85
95
150
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
6,000/0.075
62
222
190
16.0
214
186
17.3
207
182
18.7
197
178
20.1
188
173
21.7
178
168
23.2
67
246
160
16.6
237
157
17.9
228
153
19.3
218
149
20.6
207
145
22.1
196
141
23.7
7,000/0.085
72
270
130
17.2
261
126
18.5
252
123
19.8
241
119
21.3
228
117
22.8
217
111
24.3
62
228
205
16.2
220
201
17.5
211
196
18.9
202
192
20.2
192
187
21.9
182
181
23.4
67
251
171
16.8
242
168
18.1
233
164
19.4
222
160
20.8
211
156
22.3
200
152
23.8
Evaporator Air Quantity — Cfm/BF
8,000/0.100
9,000/0.110
Evaporator Air — Ewb (F)
72
62
67
72
62
67
72
277
231
256
282
235
259
286
136
219
182
143
231
193
149
17.4
16.3
16.9
17.6
16.5
17.1
17.7
267
224
246
272
227
250
276
133
215
179
140
226
189
147
18.7
17.6
18.2
18.9
17.8
18.4
19.0
257
215
237
261
220
239
265
130
210
175
136
219
185
143
20.1
19.0
19.6
20.2
19.2
19.8
20.4
246
205
226
250
212
228
254
126
204
171
133
211
181
139
21.5
20.4
21.0
21.7
20.7
21.1
21.8
233
197
215
237
203
217
240
122
197
166
128
203
177
135
22.9
22.0
22.4
23.1
22.2
22.6
23.2
221
188
202
224
194
204
226
117
188
162
125
194
172
130
24.4
23.6
23.9
24.6
23.8
24.1
24.7
10,000/0.120
62
240
240
16.7
233
233
18.0
225
225
19.4
216
216
20.9
207
207
22.4
198
198
23.9
67
262
203
17.2
252
200
18.5
241
195
19.8
230
191
21.3
218
186
22.6
206
181
24.2
72
289
156
17.8
279
153
19.2
267
149
20.5
255
145
21.9
242
141
23.3
227
137
24.8
48/50TJ028 (25 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
75
85
95
105
115
121
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
7,000/0.05
62
271
232
19.5
262
227
21.4
252
223
23.3
241
218
25.3
231
212
27.4
224
209
28.7
67
298
195
20.4
287
191
22.2
277
187
24.1
266
182
26.1
254
178
28.3
246
175
29.6
8,000/0.06
72
328
158
21.2
317
155
23.1
306
150
25.1
293
146
27.0
279
141
29.1
—
—
—
62
277
250
19.7
267
244
21.6
258
240
23.6
247
233
25.6
236
228
27.7
229
223
29.0
67
304
208
20.6
294
203
22.4
283
199
24.4
272
195
26.4
259
189
28.5
251
186
29.8
Evaporator Air Quantity — Cfm/BF
9,000/0.07
10,000/0.08
Evaporator Air — Ewb (F)
72
62
67
72
62
67
72
334
281
308
339
286
312
342
167
265
223
177
279
235
184
21.4
19.9
20.7
21.6
20.2
20.9
21.8
324
272
298
330
278
303
334
162
259
216
170
271
226
177
23.3
21.8
22.6
23.5
22.0
22.8
23.7
312
261
288
317
267
291
321
158
254
210
165
263
222
172
25.3
23.8
24.5
25.5
24.0
24.7
25.7
299
252
275
302
257
279
307
153
246
205
161
255
217
167
27.4
25.8
26.5
27.5
26.1
26.7
27.7
284
241
261
288
247
264
291
148
238
201
156
247
211
162
29.3
27.9
28.6
29.5
28.2
28.8
29.7
—
235
253
—
240
256
—
—
233
197
—
240
208
—
—
29.2
29.9
—
29.5
30.1
—
LEGEND
BF
— Bypass Factor
Edb — Entering Dry-Bulb
Ewb — Entering Wet-Bulb
kW — Compressor Motor Power Input
ldb — Leaving Dry-Bulb
lwb — Leaving Wet-Bulb
SHC — Sensible Heat Capacity (1000 Btuh) Gross
TC
— Total Capacity (1000 Btuh) Gross
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
sensible capacity (Btuh)
tldb = tedb −
1.10 x cfm
tlwb = Wet-bulb temperature corresponding to enthalpy of air leaving evaporator coil (hlwb)
total capacity (Btuh)
hlwb = hewb −
4.5 x cfm
Where: hewb = Enthalpy of air entering evaporator coil
26
11,250/0.09
62
293
291
20.4
284
283
22.3
274
274
24.3
264
264
26.3
253
253
28.4
246
246
29.7
67
316
249
21.0
306
243
22.9
294
236
24.9
282
230
26.9
267
225
29.0
258
221
30.2
72
346
197
21.9
337
189
23.9
326
181
25.8
311
175
27.9
294
170
29.9
—
—
—
3. The SHC is based on 80 F edb temperature of air entering evaporator coil.
Below 80 F edb, subtract (corr factor x cfm) from SHC.
Above 80 F edb, add (corr factor x cfm) to SHC.
BYPASS
FACTOR
(BF)
79
81
.05
.10
.20
.30
1.04
.98
.87
.76
ENTERING AIR DRY-BULB TEMP (F)
78
77
76
75
under 75
82
83
84
85
over 85
Correction Factor
2.07
3.11
4.14
5.18
1.96
2.94
3.92
4.90
Use formula
1.74
2.62
3.49
4.36
shown below.
1.53
2.29
3.05
3.82
Interpolation is permissible.
Correction Factor = 1.10 x (1 − BF) x (edb − 80).
COOLING CAPACITIES — SI
50TJ016 (51 kW)
Temp (C)
Air Entering
Condenser
(Edb)
24
29
35
40.5
46
48
49
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
2124/0.10
17
51.7
42.8
14.0
49.7
41.7
15.2
47.6
40.8
16.4
45.5
39.4
17.6
43.3
38.3
19.0
42.6
38.0
19.4
42.1
37.7
19.6
19
56.5
36.2
14.4
54.5
35.3
15.6
52.3
34.4
16.9
49.9
33.5
18.2
47.3
32.5
19.5
46.5
32.1
19.9
46.0
31.9
20.2
2478/0.12
22
62.1
29.4
15.0
59.8
28.6
16.1
57.3
27.7
17.4
54.6
26.7
18.7
51.7
25.7
20.0
50.8
25.4
20.4
50.2
25.2
20.6
17
53.1
46.0
14.2
51.0
44.7
15.3
49.0
43.4
16.6
46.7
42.3
17.8
44.3
41.1
19.1
43.5
40.8
19.5
43.0
40.6
19.8
19
57.8
38.7
14.6
55.7
37.9
15.8
53.4
36.9
17.0
51.0
35.7
18.3
48.3
34.7
19.7
47.5
34.3
20.0
46.9
34.1
20.2
Evaporator Air Quantity — L/s/BF
2832/0.14
3186/0.15
Evaporator Air — Ewb (C)
22
17
19
22
17
19
22
63.3
54.0
59.2
64.5
55.1
59.8
65.6
30.9
49.4
41.0
32.6
51.6
43.1
33.9
15.1
14.3
14.7
15.2
14.4
14.9
15.4
60.9
52.2
56.8
62.1
52.9
57.7
63.3
30.0
47.8
40.0
31.4
50.4
42.1
32.7
16.3
15.5
15.9
16.5
15.6
16.1
16.6
58.6
49.8
54.4
59.8
50.6
55.3
60.4
29.2
46.4
39.1
30.4
49.2
41.2
31.9
17.6
16.7
17.2
17.7
16.8
17.3
17.8
55.7
47.5
51.8
56.5
48.3
52.4
57.3
28.2
45.4
38.0
29.5
47.6
40.1
30.8
18.8
17.9
18.5
18.9
18.1
18.5
19.1
52.7
44.9
49.0
53.6
45.9
49.6
54.3
27.1
43.9
36.9
28.5
45.8
38.9
29.8
20.2
19.2
19.8
20.2
19.4
19.9
20.4
51.8
44.2
48.1
52.5
45.2
48.7
53.2
26.8
43.5
36.6
28.1
45.2
38.5
29.4
20.6
19.6
20.2
20.6
19.8
20.2
20.8
—
43.7
47.5
—
44.7
48.1
—
—
43.1
36.3
—
44.7
38.2
—
—
19.9
20.4
—
20.0
20.4
—
3540/0.16
17
55.7
54.1
14.5
53.7
52.7
15.7
51.4
51.2
16.9
49.3
49.2
18.2
47.0
46.9
19.5
46.2
46.2
19.9
45.8
45.6
20.2
19
60.4
45.9
14.9
58.3
44.2
16.1
55.8
43.1
17.4
52.9
42.0
18.6
50.0
41.0
19.9
49.1
40.6
20.4
48.5
40.3
20.6
22
66.2
35.2
15.4
63.9
34.3
16.7
60.9
33.1
17.9
57.8
32.0
19.1
54.7
31.0
20.4
53.6
30.6
20.8
—
—
—
50TJ020 (61 kW)
Temp (C)
Air Entering
Condenser
(Edb)
24
29
35
40.5
46
47
49
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
2548.8/0.095
17
56.0
48.3
14.6
53.8
47.3
15.8
51.7
46.2
17.0
49.2
45.1
18.3
46.8
43.8
19.6
46.3
43.5
19.9
45.4
43.2
20.3
19
61.8
40.6
15.2
59.2
39.6
16.3
56.9
38.6
17.5
54.2
37.6
18.8
51.4
36.5
20.1
50.8
36.3
20.4
50.0
36.0
20.9
22
67.7
32.6
15.7
65.6
31.7
16.9
62.8
30.8
18.2
59.7
29.8
19.4
56.8
29.1
20.7
56.2
28.8
21.1
—
—
—
2832/0.105
17
56.9
50.7
14.7
54.8
49.8
15.9
52.4
48.7
17.1
50.0
47.3
18.4
47.4
46.1
19.8
46.9
45.8
20.0
46.1
45.3
20.5
19
62.5
42.4
15.3
60.2
41.5
16.5
57.5
40.5
17.7
54.8
39.5
18.9
52.0
38.3
20.3
51.4
38.1
20.5
50.5
37.7
20.9
Evaporator Air Quantity — L/s/BF
3304/0.120
3776/0.140
Evaporator Air — Ewb (C)
22
17
19
22
17
19
22
68.9
58.0
64.0
70.0
59.1
64.8
71.2
33.8
54.8
45.5
35.6
58.2
48.5
37.4
15.9
14.9
15.4
16.0
15.1
15.6
16.2
66.2
55.9
61.4
67.7
56.9
62.4
68.6
32.9
53.7
44.6
34.7
56.7
47.5
36.7
17.1
16.1
16.6
17.2
16.3
16.8
17.4
63.6
53.5
58.6
65.0
54.7
59.6
65.6
32.0
52.3
43.5
33.8
54.7
46.5
35.6
18.3
17.3
17.8
18.5
17.5
18.0
18.6
60.7
51.1
55.8
61.4
52.7
56.5
62.3
30.9
50.8
42.4
32.7
52.6
45.2
34.6
19.6
18.6
19.1
19.7
18.8
19.2
19.9
57.4
48.8
52.7
58.0
50.3
53.4
58.6
29.8
48.8
41.3
31.7
50.3
44.1
33.5
20.9
20.0
20.4
21.0
20.2
20.5
21.1
56.8
48.3
52.1
57.5
49.8
52.7
58.0
29.7
48.3
41.1
31.5
49.8
43.8
33.2
21.1
20.3
20.7
21.3
20.5
20.7
21.4
—
47.6
51.2
—
49.1
51.8
—
—
47.6
40.8
—
49.0
43.5
—
—
20.7
21.1
—
20.9
21.1
—
4248/0.150
17
60.5
60.5
15.2
58.4
58.4
16.4
56.3
56.2
17.7
54.0
53.9
19.0
51.6
51.5
20.3
51.0
51.0
20.7
50.3
50.2
21.1
19
65.3
51.2
15.7
62.9
50.3
16.9
60.1
49.1
18.1
56.9
48.0
19.3
53.6
46.8
20.5
53.1
46.5
20.9
52.1
46.1
21.2
22
71.8
39.1
16.3
69.4
38.2
17.5
66.2
37.4
18.7
62.8
36.2
19.9
59.5
35.2
21.2
58.6
34.9
21.5
—
—
—
27
Performance data (cont)
COOLING CAPACITIES — SI (cont)
50TJ024 (68 kW)
Temp (C)
Air Entering
Condenser
(Edb)
24
29
35
40.5
46
52
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
2832/0.075
17
65.0
55.7
16.0
62.8
54.6
17.3
60.5
53.3
18.7
57.8
52.0
20.1
55.1
50.8
21.7
52.3
49.3
23.2
19
72.1
46.9
16.6
69.4
45.9
17.9
66.8
44.8
19.3
63.9
43.6
20.6
60.7
42.4
22.1
57.5
41.2
23.7
3304/0.085
22
79.1
37.9
17.2
76.5
36.9
18.5
73.8
35.9
19.8
70.6
34.8
21.3
66.8
34.1
22.8
63.6
32.4
24.3
17
66.8
60.1
16.2
64.5
59.0
17.5
61.8
57.5
18.9
59.1
56.2
20.2
56.3
54.8
21.9
53.4
53.1
23.4
19
73.5
50.2
16.8
70.9
49.2
18.1
68.3
48.1
19.4
65.0
46.9
20.8
61.9
45.7
22.3
58.5
44.4
23.8
Evaporator Air Quantity — L/s/BF
3776/0.100
4248/0.110
Evaporator Air — Ewb (C)
22
17
19
22
17
19
22
81.2
67.7
75.0
82.6
68.9
75.9
83.8
40.0
64.2
53.4
41.9
67.7
56.5
43.8
17.4
16.3
16.9
17.6
16.5
17.1
17.7
78.2
65.6
72.1
79.7
66.5
73.2
80.9
39.0
62.9
52.5
41.0
66.2
55.4
42.9
18.7
17.6
18.2
18.9
17.8
18.4
19.0
75.3
62.9
69.4
76.5
64.5
70.0
77.6
38.0
61.4
51.3
39.9
64.2
54.3
41.8
20.1
19.0
19.6
20.2
19.2
19.8
20.4
72.1
60.2
66.2
73.2
62.1
66.8
74.4
36.9
59.8
50.0
38.8
61.7
53.0
40.6
21.5
20.4
21.0
21.7
20.7
21.1
21.8
68.3
57.8
62.9
69.4
59.4
63.6
70.3
35.7
57.7
48.8
37.6
59.4
51.8
39.5
22.9
22.0
22.4
23.1
22.2
22.6
23.2
64.8
55.1
59.2
65.6
56.7
59.8
66.2
34.3
55.1
47.5
36.5
56.7
50.4
38.1
24.4
23.6
23.9
24.6
23.8
24.1
24.7
4720/0.120
17
70.3
70.3
16.7
68.3
68.3
18.0
65.9
65.9
19.4
63.3
63.3
20.9
60.7
60.6
22.4
57.9
57.9
23.9
19
76.8
59.6
17.2
73.8
58.5
18.5
70.6
57.1
19.8
67.4
55.9
21.3
63.9
54.4
22.6
60.3
53.1
24.2
22
84.7
45.8
17.8
81.7
44.7
19.2
78.2
43.6
20.5
74.7
42.4
21.9
70.9
41.2
23.3
66.5
40.0
24.8
50TJ028 (85 kW)
Temp (C)
Air Entering
Condenser
(Edb)
24
29
35
40.5
46
49
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
3304/0.05
17
79.4
68.0
19.5
76.8
66.6
21.4
73.8
65.3
23.3
70.6
63.8
25.3
67.8
62.2
27.4
65.7
61.1
28.7
19
87.3
57.2
20.4
84.1
56.0
22.2
81.2
54.8
24.1
77.9
53.4
26.1
74.4
52.1
28.3
72.1
51.1
29.6
3776/0.06
22
96.1
46.4
21.2
92.9
45.4
23.1
89.7
44.0
25.1
85.8
42.7
27.0
81.7
41.3
29.1
—
—
—
17
81.2
73.2
19.7
78.2
71.5
21.6
75.6
70.2
23.6
72.4
68.3
25.6
69.1
66.7
27.7
67.1
65.3
29.0
19
89.1
60.9
20.6
86.1
59.5
22.4
82.9
58.3
24.4
79.7
57.0
26.4
75.9
55.5
28.5
73.5
54.5
29.8
Evaporator Air Quantity — L/s/BF
4248/0.07
4720/0.08
Evaporator Air — Ewb (C)
22
17
19
22
17
19
22
97.9
82.3
90.2
99.3
83.8
91.4
100.2
48.8
77.6
65.2
51.8
81.7
68.8
53.9
21.4
19.9
20.7
21.6
20.2
20.9
21.8
94.9
79.7
87.3
96.7
81.5
88.8
97.9
47.5
75.9
63.2
49.7
79.4
66.3
51.8
23.3
21.8
22.6
23.5
22.0
22.8
23.7
91.4
76.5
84.4
92.9
78.2
85.3
94.1
46.2
74.4
61.6
48.3
77.1
65.0
50.2
25.3
23.8
24.5
25.5
24.0
24.7
25.7
87.6
73.8
80.6
88.5
75.3
81.7
90.0
44.8
72.1
60.2
47.3
74.7
63.5
48.8
27.4
25.8
26.5
27.5
26.1
26.7
27.7
83.2
70.6
76.5
84.4
72.4
77.4
85.3
43.3
69.7
58.8
45.6
72.4
61.9
47.4
29.3
27.9
28.6
29.5
28.2
28.8
29.7
—
68.8
74.1
—
70.3
75.0
—
—
68.2
57.8
—
70.3
60.9
—
—
29.2
29.9
—
29.5
30.1
—
LEGEND
BF
— Bypass Factor
Edb — Entering Dry Bulb Temperature (C)
Ewb — Entering Wet Bulb Temperature (C)
kW — Compressor Input (kW)
Ldb — Leaving Dry-Bulb Temperature (C)
Lwb — Leaving Wet-Bulb Temperature (C)
SHC — Sensible Heat Capacity (kW)
TC
— Total Capacity (kW)
NOTES:
1. Ratings are gross, and do not account for the effects of the evaporatorfan motor power and heat.
2. Direct interpolation is permissible. Do not extrapolate.
3. SHC is based on 26.7 C db temperature of air entering the unit. At
any other temperature, correct the SHC read from the table of cooling capacities as follows:
Corrected SHCkW
= SHC 1 [1.23 x 1023 x (1 2 BF) x (Cdb 2 26.7) x L/s]
28
5310/0.09
17
85.8
85.3
20.4
83.2
82.9
22.3
80.3
80.3
24.3
77.4
77.4
26.3
74.1
74.1
28.4
72.1
72.1
29.7
19
92.6
73.0
21.0
89.7
71.2
22.9
86.1
69.3
24.9
82.6
67.5
26.9
78.2
65.9
29.0
75.6
64.8
30.2
22
101.4
57.8
21.9
98.7
55.4
23.9
95.5
53.1
25.8
91.1
51.2
27.9
86.1
49.8
29.9
—
—
—
Observe the rule of sign. Above 26.7 C, SHC correction will be positive; add it to SHC. Below 26.7 C, SHC correction will be negative;
subtract it from SHC.
4. Formulas:
SHCkW x 1000
Cldb = Cedb 2
1.23 x L/s
Leaving wet bulb = wet bulb temperature corresponding to enthalpy
of air leaving coil (hlwb).
TCkW x 1000
hlwb = hewb 2
1.20 x L/s
Where hewb is enthalpy of air entering evaporator coil (kJ/kg).
GLYCOL HEATING PERFORMANCE
GLYCOL COIL (50TJ016-028)
Temperature
Entering
Condenser
Edb
Ewt
200
180
160
200
180
160
200
180
160
55
70
80
4400
Cap
310
255
200
274
218
164
249
194
140
25
Gpm
33
27
21
29
23
17
26
21
15
Ldb
120
108
97
127
116
104
132
121
109
Cap
293
237
181
257
201
146
233
177
123
50
Gpm
33
27
21
29
23
17
27
20
14
Ldb
116
105
93
124
112
100
129
117
106
Air Entering Evaporator — Cfm
5400
Percent Glycol
25
50
Cap Gpm Ldb Cap Gpm Ldb
347
37
115 327
37
111
285
30
104 264
30
101
223
24
94 202
23
90
306
32
123 287
33
119
244
26
112 224
26
109
183
19
101 162
19
98
279
30
128 260
30
125
217
23
117 197
23
114
156
16
107 136
16
103
7200
Cap
405
332
259
357
284
212
325
252
180
25
Gpm
43
35
27
38
30
22
34
26
18
Ldb
107
98
89
116
107
97
122
113
103
Cap
381
306
233
333
259
187
302
228
156
50
Gpm
43
35
27
38
30
22
34
27
19
Ldb
104
95
85
113
104
94
119
109
100
GLYCOL COIL (50TJ016-028) (cont)
Air Entering Evaporator — Cfm
Temperature
9000
Entering
Percent Glycol
Condenser
25
50
Edb
Ewt
Cap Gpm Ldb Cap Gpm Ldb
200
453
48
102 425
48
99
55
180
371
39
93 342
39
90
160
290
31
85 260
30
82
200
400
42
111 372
42
108
70
180
317
34
103 287
33
100
160
237
25
94 208
24
91
200
364
39
118 337
38
115
80
180
281
30
109 254
29
106
160
201
21
101 173
20
78
GLYCOL COIL RATINGS (50TJ016-028)
Entering
Fluid
Temp (F)
200
180
160
Cap
Edb
Ewt
Gpm
Ldb
—
—
—
—
—
4,000
Gpm
27
22
16
Cfm
6,000
5,000
D P*
1.2
0.9
0.6
LEGEND
Btuh × 1000
Entering Dry Bulb Temperature (F)
Entering Water Temperature (F)
Gallons Per Minute
Leaving Dry-Bulb Temperature (F)
Gpm
31
25
19
D P*
1.5
1.1
0.7
Gpm
35
27
20
8,000
D P*
1.8
1.3
0.8
Gpm
41
32
24
10,000
D P*
2.4
1.6
1.0
Gpm
47
36
27
DP*
2.9
2.0
1.2
NOTES:
1. This accessory glycol coil is intended for use with a MINIMUM of 25%
glycol solution. It IS NOT intended for use solely with water due to
freeze-up conditions and the resulting water damage to the conditioned space.
2. Water D = 20 F.
*DP is the fluid pressure in ft of head.
29
Performance data (cont)
FAN PERFORMANCE — 48/50TJ016-028 UNITS — ENGLISH*
50TJ016 (15 TONS)†
Airflow
(Cfm)
4500
4800
5100
5400
5700
6000
6300
6600
6900
7200
7500
Rpm
684
715
747
779
812
845
878
912
946
981
1016
0.2
Bhp
1.28
1.47
1.67
1.90
2.14
2.40
2.68
2.98
3.29
3.63
3.99
Watts
1102
1265
1442
1635
1844
2068
2309
2566
2841
3133
3443
Available External Static Pressure (in. wg)
0.6
0.8
Rpm Bhp Watts Rpm Bhp Watts
887 1.70 1466
977 1.92 1652
910 1.90 1638
997 2.12 1828
934 2.12 1825 1018 2.34 2019
959 2.35 2027 1040 2.58 2226
985 2.60 2245 1063 2.84 2448
1011 2.87 2478 1087 3.11 2685
1039 3.16 2728 1112 3.41 2939
1067 3.47 2994 1138 3.72 3209
1096 3.80 3277 1165 4.05 3496
1125 4.15 3578
—
—
—
—
—
—
—
—
—
Rpm
791
817
844
872
901
931
961
992
1023
1055
1087
0.4
Bhp
1.49
1.68
1.89
2.12
2.37
2.64
2.92
3.22
3.55
3.89
4.25
Rpm
1285
1297
1311
1326
1342
1359
—
—
—
—
—
Available External Static
1.6
1.8
Bhp Watts Rpm Bhp
2.82 2430 1353 3.05
3.04 2619 1364 3.27
3.27 2823 1376 3.51
3.53 3043 1390 3.77
3.80 3278 1405 4.05
4.09 3530 1421 4.34
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
——
—
Watts
1283
1451
1633
1831
2044
2273
2518
2780
3059
3355
3669
Rpm
1061
1078
1097
1117
1138
1160
1183
1207
1232
—
—
1.0
Bhp
2.13
2.34
2.57
2.81
3.07
3.35
3.65
3.97
4.31
—
—
Watts
1841
2021
2216
2426
2652
2893
3151
3425
3716
—
—
Rpm
1139
1155
1171
1189
1209
1229
1250
1273
—
—
—
1.2
Bhp
2.36
2.57
2.80
3.05
3.31
3.60
3.90
4.22
—
—
—
Watts
2034
2217
2416
2629
2858
3103
3365
3642
—
—
—
50TJ016 (15 TONS)† (cont)
Airflow
(Cfm)
4500
4800
5100
5400
5700
6000
6300
6600
6900
7200
7500
Rpm
1214
1228
1243
1259
1277
1295
1315
—
—
—
—
1.4
Bhp
2.59
2.80
3.04
3.29
3.56
3.84
4.15
—
—
—
—
Watts
2230
2417
2618
2835
3067
3316
3580
—
—
—
—
LEGEND
Bhp — Brake Horsepower
FIOP — Factory-Installed Option
Watts — Input Watts to Motor
*See Gas Heat Fan Performance Loss Table below for 48TJ016 fan
performance loss.
†Standard low-medium static drive range is 891 to 1179 rpm (for 208/
230-460-v units) or 1159 to 1429 rpm (for 575-v units). Alternate highstatic drive range is 1227 to 1550 (for 208/230-460-v units). The alternate high-static drive is not available for 48/50TJ016 575-v units. Other
rpms require a field-supplied drive.
NOTES:
1. Maximum continuous bhp is 4.25 (208/230-460 v) or 3.45 (575 v)
and the maximum continuous watts are 3775 (208/230-460 v) or
3065 (575 v). Do not adjust motor rpm such that motor maximum
bhp and/or watts is exceeded at the maximum operating cfm.
2. Static pressure losses (i.e., economizer) must be added to external
static pressure before entering Fan Performance table.
3. Interpolation is permissible. Do not extrapolate.
4. Fan performance is based on wet coils, clean filters, and casing losses.
See page 37 for accessory/FIOP static pressure information.
5. Extensive motor and drive testing on these units ensures that the full
horsepower and watts range of the motor can be utilized with confidence. Using your fan motors up to the watts or bhp rating shown
will not result in nuisance tripping or premature motor failure. Unit
warranty will not be affected.
6. Use of a field-supplied motor may affect wiring size. Contact your
Carrier representative for details. For additional information on motor
performance, refer to Evaporator-Fan Motor Performance table on
page 39.
30
Pressure (in. wg)
1.9
Watts Rpm Bhp
2633 1386 3.17
2825 1396 3.40
3031 1408 3.64
3254 1421 3.90
3492 1435 4.17
3746
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Watts
2736
2928
3136
3360
3600
—
—
—
—
—
—
Rpm
1418
1428
1439
1452
1466
—
—
—
—
—
—
2.0
Bhp
3.29
3.52
3.76
4.02
4.30
—
—
—
—
—
—
Watts
2839
3033
3242
3467
3708
—
—
—
—
—
—
GAS HEAT FAN PERFORMANCE LOSS
48TJD/F016 (15 TONS)
Airflow
48TJD016
cfm
in. wg
4500
0.16
4800
0.17
5100
0.19
5400
0.20
5700
0.21
6000
0.23
6300
0.24
6600
0.26
6900
0.28
7200
0.29
7500
0.31
48TJF016
in. wg
0.17
0.19
0.20
0.22
0.24
0.26
0.28
0.30
0.33
0.35
0.37
FAN PERFORMANCE — 48/50TJ016-028 UNITS — ENGLISH* (cont)
50TJ020, 024 (18 and 20 TONS)†
Airflow
(Cfm)
5,500
6,000
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
Rpm
682
730
778
828
878
928
979
1030
1082
1134
0.2
Bhp
1.99
2.38
2.82
3.31
3.84
4.42
5.05
5.73
6.46
7.25
Watts
1675
2005
2373
2780
3227
3715
4245
4817
5433
6093
Rpm
760
802
846
892
938
985
1033
1082
1131
1180
0.4
Bhp
2.29
2.68
3.13
3.62
4.15
4.74
5.38
6.06
6.80
7.59
Watts
1922
2257
2630
3042
3494
3986
4521
5098
5718
6382
Available External Static Pressure (in. wg)
0.6
0.8
Rpm Bhp Watts Rpm Bhp Watts
832 2.59 2177
901 2.90 2441
871 2.99 2516
935 3.31 2783
911 3.44 2893
972 3.76 3164
953 3.94 3310 1011 4.26 3583
996 4.48 3766 1051 4.81 4043
1040 5.07 4263 1093 5.40 4544
1085 5.71 4801 1136 6.05 5086
1131 6.40 5382 1180 6.74 5671
1178 7.14 6007 1225 7.49 6299
1226 7.94 6675 1270 8.29 6971
Rpm
965
997
1031
1067
1105
1144
1185
1227
1270
1313
1.0
Bhp
3.22
3.63
4.09
4.59
5.14
5.74
6.39
7.09
7.84
8.65
Watts
2712
3057
3440
3863
4326
4830
5375
5964
6595
7271
Rpm
1027
1056
1087
1121
1156
1194
1232
1272
1313
1356
1.2
Bhp
3.56
3.97
4.43
4.93
5.49
6.09
6.74
7.44
8.20
9.01
Watts
2990
3337
3722
4148
4613
5120
5669
6260
6895
7574
50TJ020, 024 (18 and 20 TONS)† (cont)
Airflow
(Cfm)
5,500
6,000
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
Rpm
1086
1112
1142
1173
1207
1242
1279
1317
1356
1397
1.4
Bhp
3.89
4.31
4.77
5.28
5.83
6.44
7.10
7.80
8.56
9.37
Watts
3275
3623
4010
4438
4906
5415
5966
6561
7198
7881
Rpm
1142
1167
1194
1224
1255
1289
1324
1360
1398
1438
Available
1.6
Bhp Watts
4.24 3567
4.66 3915
5.12 4304
5.63 4733
6.19 5203
6.80 5714
7.45 6268
8.16 6865
8.93 7505
9.74 8190
External Static
1.8
Rpm Bhp
1197
4.59
1219
5.01
1245
5.47
1273
5.98
1302
6.55
1334
7.16
1368
7.82
1403
8.53
1440
9.29
1477 10.11
LEGEND
Bhp — Brake Horsepower
FIOP — Factory-Installed Option
Watts — Input Watts to Motor
*See Gas Heat Fan Performance Loss Table below for 48TJ020 and
024 fan performance loss.
†Standard low-medium static drive range for the 020 size is 910 to
1095 rpm. Standard low-medium static drive range for the 024 size is
1002 to 1225 rpm. Alternate high-static drive range for the 020 size is
1069 to 1287. Alternate high-static drive range for the 024 size is 1193
to 1458 rpm. Other rpms require a field-supplied drive.
NOTES:
1. Maximum continuous bhp for the 020 size is 5.90. Maximum continuous bhp for the 024 size is 8.7 (208/230, 575 v) or 9.5 (380,
460 v). The maximum continuous watts for the 020 size is 5180. The
maximum continuous watts for the 024 size is 7915 (208/230, 575 v)
or 8640 (380, 460 v). Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm.
2. Static pressure losses (i.e., economizer) must be added to external
static pressure before entering Fan Performance table.
3. Interpolation is permissible. Do not extrapolate.
4. Fan performance is based on wet coils, clean filters, and casing losses.
See page 37 for accessory/FIOP static pressure information.
5. Extensive motor and drive testing on these units ensures that the full
horsepower and watts range of the motor can be utilized with confidence. Using your fan motors up to the watts or bhp rating shown
will not result in nuisance tripping or premature motor failure. Unit
warranty will not be affected.
6. Use of a field-supplied motor may affect wiring size. Contact your
Carrier representative for details. For additional information on motor
performance, refer to Evaporator-Fan Motor Performance table on
page 39.
Pressure (in. wg)
1.9
Watts Rpm Bhp
3864 1223 4.77
4213 1245 5.19
4602 1270 5.65
5033 1296 6.17
5504 1326 6.73
6018 1357 7.34
6573 1389 8.00
7173 1424 8.71
7815 1460 9.48
8503
—
—
Watts
4015
4364
4754
5184
5657
6171
6728
7328
7972
—
Rpm
1249
1270
1294
1320
1348
1379
1411
1445
1480
—
2.0
Bhp
4.96
5.37
5.83
6.35
6.91
7.52
8.18
8.90
9.67
—
Watts
4167
4516
4906
5337
5810
6325
6883
7484
8129
—
GAS HEAT FAN PERFORMANCE LOSS
48TJD/F020, 024 (18 AND 20 TONS)
Airflow
48TJD020,024
Cfm
in. wg
5,500
0.23
6,000
0.26
6,500
0.30
7,000
0.33
7,500
0.37
8,000
0.41
8,500
0.46
9,000
0.50
9,500
0.55
10,000
0.60
48TJF020,024
in. wg
0.31
0.37
0.43
0.49
0.56
0.63
0.70
0.78
0.87
0.96
31
Fan performance (cont)
FAN PERFORMANCE — 48/50TJ016-028 UNITS — ENGLISH* (cont)
50TJ028 (25 TONS)†
Airflow
(Cfm)
7,000
7,500
8,000
8,500
9,000
9,500
10,000
10,500
11,000
11,250
Rpm
845
896
948
1001
1053
1106
1159
1213
1266
1293
Available External Static Pressure
0.2
0.4
0.6
0.8
Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp
3.26 2693
909
3.60 2979
969
3.96 3272 1028
4.32
3.82 3156
956
4.17 3450 1014
4.54 3752 1069
4.91
4.43 3667 1005
4.80 3969 1060
5.17 4278 1112
5.56
5.11 4226 1054
5.49 4537 1106
5.87 4853 1156
6.26
5.85 4836 1104
6.23 5155 1154
6.63 5478 1202
7.02
6.65 5498 1155
7.04 5824 1202
7.44 6155 1248
7.85
7.52 6214 1206
7.92 6547 1251
8.33 6886 1295
8.74
8.45 6984 1257
8.86 7325 1300
9.28 7671 1342
9.70
9.45 7810 1309
9.87 8159 1350 10.29 8511 1391 10.73
9.97 8245 1334 10.40 8597 1375 10.83 8953 1415 11.26
50TJ028 (25 TONS)† (cont)
Available External Static Pressure (in. wg)
Airflow
1.4
1.6
1.8
(Cfm)
Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp
7,000 1189 5.47 4,524 1239 5.87 4,854 1288 4.91
7,500 1224 6.08 5,026 1272 6.48 5,362 1320 5.56
8,000 1261 6.75 5,577 1307 7.16 5,917 1353 6.26
8,500 1299 7.47 6,177 1344 7.89 6,523 1388 7.02
9,000 1338 8.26 6,828 1382 8.68 7,179 1424 7.85
9,500 1379 9.11 7,530 1421 9.54 7,887 1462 8.74
10,000 1421 10.02 8,286 1461 10.46 8,648 1501 9.70
10,500 1464 11.00 9,096 1503 11.45 9,464 1541 10.73
11,000 1508 12.05 9,963 1546 12.50 10,336 —
—
11,250 1530 12.60 10,417 —
—
—
—
—
Watts
3574
4060
4593
5175
5808
6492
7229
8020
8868
9313
1.0
1.2
Rpm Bhp Watts Rpm Bhp Watts
1083
4.70 3883 1137
5.08
4,200
1123
5.29 4375 1174
5.68
4,698
1163
5.94 4915 1213
6.34
5,243
1205
6.66 5504 1253
7.06
5,838
1248
7.43 6142 1294
7.84
6,483
1293
8.26 6833 1336
8.68
7,179
1338
9.16 7577 1380
9.59
7,929
1384 10.13 8375 1424 10.56
8,733
1431 11.16 9229 1470 11.60
9,594
1454 11.70 9677 1493 12.15 10,045
Watts
5191
5703
6263
6873
7534
8247
9014
9835
—
—
LEGEND
Bhp — Brake Horsepower
FIOP — Factory-Installed Option
Watts — Input Watts to Motor
*See Gas Heat Fan Performance Loss Table below for 48TJ028 fan
performance loss.
†Standard low-medium static drive range is 1066 to 1283 rpm. Alternate
high-static drive range is 1332 to 1550. Other rpms require a fieldsupplied drive.
NOTES:
1. Maximum continuous bhp is 10.2 (208/230, 575 v) or 11.8 (380,
460 v) and the maximum continuous watts are 9510 (208/230,
575 v) or 11,000 (380, 460 v). Do not adjust motor rpm such that
motor maximum bhp and/or watts is exceeded at the maximum operating cfm.
2. Static pressure losses (i.e., economizer) must be added to external
static pressure before entering Fan Performance table.
3. Interpolation is permissible. Do not extrapolate.
4. Fan performance is based on wet coils, clean filters, and casing losses.
See page 37 for accessory/FIOP static pressure information.
5. Extensive motor and drive testing on these units ensures that the full
horsepower and watts range of the motor can be utilized with confidence. Using your fan motors up to the watts or bhp rating shown
will not result in nuisance tripping or premature motor failure. Unit
warranty will not be affected.
6. Use of a field-supplied motor may affect wiring size. Contact your
Carrier representative for details. For additional information on motor
performance, refer to Evaporator-Fan Motor Performance tableon
page 39.
32
(in. wg)
GAS HEAT FAN PERFORMANCE LOSS
48TJD/F028 (25 TONS)
Airflow
48TJD028
Cfm
in. wg
7,000
0.33
7,500
0.37
8,000
0.41
8,500
0.46
9,000
0.50
9,500
0.55
10,000
0.60
10,500
0.65
11,000
0.70
11,250
0.73
48TJF028
in. wg
0.49
0.56
0.63
0.70
0.78
0.87
0.96
1.05
1.15
1.20
FAN PERFORMANCE — 50TJ016-028 UNITS — SI
50TJ016 (51 kW)*
Airlfow
2124
2266
2408
2549
2691
2833
2974
3116
3257
3399
3541
r/s
11.4
11.9
12.4
13.0
13.5
14.1
14.6
15.2
15.8
16.3
16.9
50
BkW
0.95
1.09
1.24
1.40
1.58
1.77
1.98
2.20
2.44
2.69
2.95
kW
1.10
1.26
1.44
1.64
1.84
2.07
2.31
2.57
2.84
3.13
3.44
r/s
13.2
13.6
14.1
14.5
15.0
15.5
16.0
16.5
17.0
17.6
18.1
100
BkW
1.10
1.24
1.40
1.57
1.75
1.95
2.16
2.39
2.62
2.88
3.15
kW
1.28
1.45
1.63
1.83
2.04
2.27
2.52
2.78
3.06
3.36
3.67
Available External Static Pressure
149
199
r/s
BkW
kW
r/s
BkW
14.8
1.26
1.47 16.3
1.42
15.2
1.41
1.64 16.6
1.57
15.6
1.57
1.83 17.0
1.73
16.0
1.74
2.03 17.3
1.91
16.4
1.93
2.25 17.7
2.10
16.9
2.13
2.48 18.1
2.30
17.3
2.34
2.73 18.5
2.52
17.8
2.57
2.99 19.0
2.75
18.3
2.81
3.28 19.4
3.00
18.8
3.07
3.58
—
—
—
—
—
—
—
(Pa)
kW
1.65
1.83
2.02
2.23
2.45
2.69
2.94
3.21
3.50
—
—
r/s
17.7
18.0
18.3
18.6
19.0
19.3
19.7
20.1
20.5
—
—
249
BkW
1.58
1.73
1.90
2.08
2.28
2.48
2.70
2.94
3.19
—
—
kW
1.84
2.02
2.22
2.43
2.65
2.89
3.15
3.43
3.72
—
—
r/s
19.0
19.2
19.5
19.8
20.1
20.5
20.8
21.2
—
—
—
299
BkW
1.75
1.90
2.07
2.26
2.45
2.66
2.89
3.13
—
—
—
kW
2.03
2.22
2.42
2.63
2.86
3.10
3.36
3.64
—
—
—
50TJ016 (51 kW)* (cont)
Airflow
(L/s)
2124
2266
2408
2549
2691
2833
2974
3116
3257
3399
3541
r/s
20.2
20.5
20.7
21.0
21.3
21.6
21.9
—
—
—
—
349
BkW
1.91
2.07
2.25
2.43
2.63
2.84
3.07
—
—
—
—
kW
2.23
2.42
2.62
2.83
3.07
3.32
3.58
—
—
—
—
r/s
21.4
21.6
21.8
22.1
22.4
22.7
—
—
—
—
—
399
BkW
2.08
2.25
2.42
2.61
2.81
3.03
—
—
—
—
—
Available External Static
448
kW
r/s
BkW
2.43
22.6
2.26
2.62
22.7
2.42
2.82
22.9
2.60
3.04
23.2
2.79
3.28
23.4
3.00
3.53
23.7
3.21
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Pressure (Pa)
kW
2.63
2.82
3.03
3.25
3.49
3.75
—
—
—
—
—
r/s
23.1
23.3
23.5
23.7
23.9
—
—
—
—
—
—
473
BkW
2.35
2.51
2.69
2.88
3.09
—
—
—
—
—
—
kW
2.74
2.93
3.14
3.36
3.60
—
—
—
—
—
—
r/s
23.6
23.8
24.0
24.2
24.4
—
—
—
—
—
—
498
BkW
2.44
2.60
2.78
2.97
3.18
—
—
—
—
—
—
kW
2.84
3.03
3.24
3.47
3.71
—
—
—
—
—
—
LEGEND
BkW — Brake Kilowatts
FIOP — Factory-Installed Option
kW
— Input Kilowatts to Motor
*Standard low-medium static drive range is 14.4 to 19.7 r/s (for 208/
230-460-v units) or 19.3 to 23.8 (for 575-v units). Alternate high-static
drive range is 20.5 to 25.8 r/s (for 208/230-460-v units). The alternate
high-static drive is not available for 50TJ016 575-v units. Other r/s require a field-supplied drive.
NOTES:
1. Maximum continuous bkW is 3.17 (208/230-460 v) or 2.57 (575 v)
and the maximum continuous watts are 3775 (208/230-460 v) or 3065
(575 v). Do not adjust motor rpm such that motor maximum bkW
and/or watts is exceeded at the maximum operating L/s.
2. Static pressure losses (i.e., economizer) must be added to external
static pressure before entering Fan Performance table.
3. Interpolation is permissible. Do not extrapolate.
4. Fan performance is based on wet coils, clean filters, and casing losses.
See page 38 for accessory/FIOP static pressure information.
5. Extensive motor and drive testing on these units ensures that the full
brake kilowatt and watts range of the motor can be utilized with confidence. Using your fan motors up to the watts or bkW rating shown
will not result in nuisance tripping or premature motor failure. Unit
warranty will not be affected.
6. Use of a field-supplied motor may affect wiring size. Contact your
Carrier representative for details. For additional information on motor
performance, refer to Evaporator-Fan Motor Performance table on
page 39.
33
Performance data (cont)
FAN PERFORMANCE — 50TJ016-028 UNITS — SI (cont)
50TJ020,024 (61 and 68 kW)*
Airflow
(L/s)
2833
3069
3305
3541
3777
4013
4249
4485
4721
r/s
12.2
13.0
13.8
14.6
15.5
16.3
17.2
18.0
18.9
50
BkW
1.76
2.09
2.45
2.84
3.27
3.74
4.24
4.78
5.36
kW
2.01
2.37
2.78
3.23
3.72
4.24
4.82
5.43
6.09
r/s
13.4
14.1
14.9
15.6
16.4
17.2
18.0
18.8
19.7
100
BkW
1.99
2.31
2.68
3.07
3.51
3.98
4.49
5.03
5.62
kW
2.26
2.63
3.04
3.49
3.99
4.52
5.10
5.72
6.38
Available External Static Pressure
149
199
r/s
BkW
kW
r/s
BkW
14.5
2.21
2.52 15.6
2.45
15.2
2.55
2.89 16.2
2.78
15.9
2.91
3.31 16.8
3.15
16.6
3.31
3.77 17.5
3.56
17.3
3.75
4.26 18.2
4.00
18.1
4.22
4.80 18.9
4.48
18.9
4.74
5.38 19.7
4.99
19.6
5.29
6.01 20.4
5.54
20.4
5.87
6.68 21.2
6.13
(Pa)
kW
2.78
3.16
3.58
4.04
4.54
5.09
5.67
6.30
6.97
r/s
16.6
17.2
17.8
18.4
19.1
19.7
20.4
21.2
21.9
249
BkW
2.69
3.03
3.40
3.81
4.25
4.73
5.25
5.80
6.40
kW
3.06
3.44
3.86
4.33
4.83
5.38
5.96
6.60
7.27
50TJ020,024 (61 and 68 kW)* (cont)
Airflow
(L/s)
2833
3069
3305
3541
3777
4013
4249
4485
4721
r/s
18.5
19.0
19.6
20.1
20.7
21.3
21.9
22.6
23.3
349
BkW
3.19
3.53
3.91
4.32
4.77
5.25
5.77
6.33
6.93
kW
3.62
4.01
4.44
4.91
5.41
5.97
6.56
7.20
7.88
r/s
19.4
19.9
20.4
20.9
21.5
22.1
22.7
23.3
24.0
Available
399
BkW
kW
3.45
3.92
3.79
4.30
4.16
4.73
4.58
5.20
5.03
5.71
5.52
6.27
6.04
6.86
6.60
7.51
7.21
8.19
External Static Pressure (Pa)
448
473
r/s
BkW
kW
r/s
BkW
20.3
3.71
4.21 20.8
3.84
20.7
4.05
4.60 21.2
4.18
21.2
4.43
5.03 21.6
4.56
21.7
4.84
5.50 22.1
4.98
22.2
5.30
6.02 22.6
5.43
22.8
5.78
6.57 23.2
5.92
23.4
6.31
7.17 23.7
6.45
24.0
6.88
7.82 24.3
7.02
24.6
7.48
8.50
—
—
LEGEND
BkW — Brake Horsepower
FIOP — Factory-Installed Option
kW
— Input Kilowatts to Motor
*Standard low-medium static drive range for the 020 size is 13.6 to
17.3 r/s. Standard low-medium static drive range for the 024 size is
16.7 to 20.4 r/s. Alternate high-static drive range for the 020 size is 16.6
to 20.0 r/s. Alternate high-static drive range for the 024 size is 19.9 to
24.3 r/s. Other r/s require a field-supplied drive.
NOTES:
1. Maximum continuous bkW for the 020 size is 4.40. Maximum continuous bkW for the 024 size is 6.49 (208/230, 575 v) or 7.08 (380,
460 v). The maximum continuous watts for the 020 size is 5180. The
maximum continuous watts for the 024 size is 7915 (208/230, 575 v)
or 8640 (380, 460 v). Do not adjust motor rpm such that motor maximum bkW and/or watts is exceeded at the maximum operating L/s.
2. Static pressure losses (i.e., economizer) must be added to external
static pressure before entering Fan Performance table.
3. Interpolation is permissible. Do not extrapolate.
4. Fan performance is based on wet coils, clean filters, and casing losses.
See page 38 for accessory/FIOP static pressure information.
5. Extensive motor and drive testing on these units ensures that the full
brake kilowatt and watts range of the motor can be utilized with confidence. Using your fan motors up to the watts or bkW rating shown
will not result in nuisance tripping or premature motor failure. Unit
warranty will not be affected.
6. Use of a field-supplied motor may affect wiring size. Contact your
Carrier representative for details. For additional information on motor
performance, refer to Evaporator-Fan Motor Performance table on
page 39.
34
kW
4.36
4.75
5.18
5.66
6.17
6.73
7.33
7.97
—
r/s
21.2
21.6
22.0
22.5
23.0
23.5
24.1
24.7
—
498
BkW
3.97
4.32
4.70
5.11
5.57
6.06
6.59
7.15
—
kW
4.52
4.91
5.34
5.81
6.32
6.88
7.48
8.13
—
r/s
17.6
18.1
18.7
19.3
19.9
20.5
21.2
21.9
22.6
299
BkW
2.94
3.28
3.65
4.06
4.51
4.99
5.51
6.07
6.67
kW
3.34
3.72
4.15
4.61
5.12
5.67
6.26
6.90
7.57
FAN PERFORMANCE — 50TJ016-028 UNITS — SI (cont)
50TJ028 (85 kW)*
Airflow
(L/s)
3305
3541
3777
4013
4249
4485
4721
4957
5193
5311
r/s
14.1
14.9
15.8
16.7
17.6
18.4
19.3
20.2
21.1
21.5
50
BkW
2.41
2.82
3.28
3.78
4.33
4.92
5.56
6.25
6.99
7.38
kW
2009
2355
2735
3153
3608
4102
4635
5210
5826
6151
50TJ028 (85 kW)* (cont)
Available
Airflow
349
(L/s)
r/s
BkW
kW
3305
19.8 4.05 3375
3541
20.4 4.50 3750
3777
21.0 4.99 4161
4013
21.6 5.53 4608
4249
22.3
6.11
5094
4485
23.0 6.74 5618
4721
23.7 7.42 6182
4957
24.4 8.14 6786
5193
25.1 8.92 7432
5311
25.5 9.32 7771
r/s
15.1
15.9
16.7
17.6
18.4
19.2
20.1
20.9
21.8
22.2
100
BkW
2.67
3.09
3.55
4.06
4.61
5.21
5.86
6.56
7.30
7.69
kW
2222
2574
2961
3384
3845
4345
4884
5464
6086
6413
Available External Static Pressure
149
199
r/s
BkW
kW
r/s
BkW
16.2 2.93 2441 17.1 3.20
16.9 3.36 2799 17.8 3.63
17.7 3.83 3191 18.5 4.11
18.4 4.34 3620 19.3 4.63
19.2 4.90 4087 20.0 5.20
20.0 5.51 4592 20.8 5.81
20.8 6.16 5137 21.6 6.47
21.7 6.87 5722 22.4 7.18
22.5 7.62 6349 23.2 7.94
22.9 8.01 6679 23.6 8.34
External Static Pressure (Pa)
399
448
r/s
BkW
kW
r/s
BkW
20.7 4.34 3621 21.5 3.63
21.2 4.80 4000 22.0
4.11
21.8 5.30 4414 22.5 4.63
22.4 5.84 4866 23.1 5.20
23.0 6.42 5355 23.7 5.81
23.7 7.06 5883 24.4 6.47
24.4 7.74 6451 25.0 7.18
25.1 8.47 7060 25.7 7.94
25.8 9.25 7710
—
—
—
—
—
—
—
(Pa)
kW
2666
3029
3427
3861
4332
4843
5393
5983
6616
6948
r/s
18.1
18.7
19.4
20.1
20.8
21.5
22.3
23.1
23.8
24.2
249
BkW
3.48
3.92
4.40
4.93
5.50
6.12
6.78
7.50
8.26
8.66
kW
2897
3264
3667
4106
4582
5097
5652
6248
6885
7219
r/s
19.0
19.6
20.2
20.9
21.6
22.3
23.0
23.7
24.5
24.9
299
BkW
3.76
4.20
4.69
5.22
5.80
6.43
7.10
7.82
8.59
8.99
kW
3133
3504
3911
4355
4836
5356
5915
6515
7157
7494
kW
3873
4255
4673
5128
5621
6153
6724
7337
—
—
LEGEND
BkW — Brake Kilowatts
FIOP — Factory-Installed Option
kW
— Input Kilowatts to Motor
*Standard low-medium static drive range is 17.8 to 21.4 r/s. Alternate
high static drive range is 22.2 to 25.8 r/s. Other r/s require a fieldsupplied drive.
NOTES:
1. Maximum continuous bkW is 7.61 (208/230, 575 v) or 8.80 (380,
460 v) and the maximum continuous watts are 9510 (208/230,
575 v) or 11,000 (380, 460 v). Do not adjust motor rpm such that
motor maximum bkW and/or watts is exceeded at the maximum operating L/s.
2. Static pressure losses (i.e., economizer) must be added to external
static pressure before entering Fan Performance table.
3. Interpolation is permissible. Do not extrapolate.
4. Fan performance is based on wet coils, clean filters, and casing losses.
See page 38 for accessory/FIOP static pressure information.
5. Extensive motor and drive testing on these units ensures that the full
brake kilowatt and watts range of the motor can be utilized with confidence. Using your fan motors up to the watts or bkW rating shown
will not result in nuisance tripping or premature motor failure. Unit
warranty will not be affected.
6. Use of a field-supplied motor may affect wiring size. Contact your
Carrier representative for details. For additional information on motor
performance, refer to Evaporator-Fan Motor Performance table on
page 39.
35
Performance data (cont)
HORIZONTAL SUPPLY/RETURN FAN PERFORMANCE WITH 50DP900211
HIGH STATIC REGAIN ADAPTER
NOTE: The 50DP900211 high static regin adapter accessory may
be used to provide horizontal supply/return.
NOTE: The 50DP900211 horizontal supply/return adapter accessory
improves 48/50TJ016-028 fan performance by increasing external
static pressure by amount shown above. To convert from in. wg to
Pa use the following formula:
in. wg x 249.1 = Pa
FAN PERFORMANCE USING ACCESSORY POWER EXHAUST (48/50TJ016-028)
ALTITUDE COMPENSATION* —
48TJ016-028
ELEVATION
(ft)
0-3,000
3,000- 7,000
7,000- 9,000
9,000-10,000
above 10,000
NATURAL GAS ORIFICE SIZE†
Low Heat
High Heat
30
29
31
30
32
31
33
31
35
32
*Includes a 4% input reduction per each 1,000 feet.
†Orifices available through your Carrier dealer.
36
ALTITUDE DERATING FACTOR* —
48TJ016-028
ELEVATION
(ft)
0-2,000
2,001-3,000
3,001-4,000
4,001-5,000
5,001-6,000
MAXIMUM HEATING VALUE
(Btu/ft3)
1,100
1,050
1,000
950
900
*Derating of the unit is not required unless the heating value of the gas
exceeds the values listed in the table above, or if the elevation exceeds
6000 ft. Derating conditions must be 4% per thousand ft above sea
level. For example, at 4000 ft, if the heating value of the gas exceeds
1000 Btu/ft3, the unit will require a 16% derating. For elevations above
6000 ft, the same formula applies. For example, at 7000 ft, the unit will
require a 28% derating of the maximum heating value per the National
Fuel Gas Code.
EVAPORATOR-FAN MOTOR EFFICIENCY
UNIT
48/50TJ
016 (3.0 Hp)
016 (3.7 Hp)
020 (5 Hp)
024 (7.5 Hp)
028 (10 Hp)
MOTOR EFFICIENCY
(%)
81.7
85.8
87.5
88.5
89.5
NOTE: All indoor-fan motors 5 hp and larger meet the minimum efficiency requirements as established by the Energy Policy Act of 1992
(EPACT) effective October 24, 1997.
OUTDOOR SOUND POWER
UNIT
48/50TJ
016
020
024
028
SOUND
RATING
(60 Hz)
8.8 Bels
8.8 Bels
9.5 Bels
9.5 Bels
OCTAVE BANDS
A-WEIGHTED
(dB)
63
125
250
500
1000
2000
4000
8000
87.8
87.8
94.1
94.1
90.8
90.8
98.7
98.7
88.7
88.7
92.3
92.3
86.4
86.4
93.8
93.8
84.3
84.3
90.9
90.9
83.5
83.5
89.6
89.6
78.4
78.4
85.9
85.9
75.6
75.6
80.3
80.3
66.8
66.8
74.3
74.3
LEGEND
Bels — Sound Levels (1 bel = 10 decibels)
ACCESSORY/FIOP STATIC PRESSURE (in. wg)* — 48TJ016-028
COMPONENT
Economizer
4500
0.04
5000
0.05
5400
0.06
6000
0.07
CFM
7200
0.09
7500
0.10
9000
0.11
10,000
0.12
11,250
0.14
LEGEND
FIOP — Factory-Installed Option
*The static pressure must be added to external static pressure. The sum and the
evaporator entering-air cfm should then be used in conjunction with the Fan Performance tables to determine blower rpm and watts.
ACCESSORY/FIOP STATIC PRESSURE (in. wg)* — 50TJ016 — ENGLISH
COMPONENT
Economizer
Glycol Coil
Electric Heat (kW)
26/34
32
42/56
50
55
56/75
80
4500
0.04
0.22
5000
0.05
0.26
CFM
6000
0.07
0.35
7200
0.09
0.44
7500
0.10
0.46
0.06
0.06
0.07
0.09
0.07
0.09
0.09
0.07
0.07
0.08
0.10
0.08
0.10
0.10
0.09
0.09
0.12
0.15
0.12
0.15
0.15
0.11
0.11
0.16
0.20
0.15
0.20
0.20
0.12
0.12
0.17
0.21
0.17
0.21
0.21
LEGEND
FIOP — Factory-Installed Option
*The static pressure must be added to external static pressure. The sum and the
evaporator entering-air cfm should then be used in conjunction with the Fan Performance tables to determine blower rpm and watts.
37
Performance data (cont)
ACCESSORY/FIOP STATIC PRESSURE (Pa)* — 50TJ016 — SI
COMPONENT
Economizer
Glycol Coil
Electric Heat (kW)
26/34
32
42/56
50
55
56/75
80
2124
10
55
2361
12
65
L/s
2833
17
87
3399
22
110
3541
25
115
15
15
17
22
17
22
22
17
17
20
25
20
25
25
22
22
30
37
30
37
37
27
27
40
50
37
50
50
30
30
42
52
42
52
52
LEGEND
FIOP — Factory-Installed Option
*The static pressure must be added to external static pressure. The sum and the
evaporator entering-air L/s should then be used in conjunction with the Fan Performance tables to determine blower r/s and watts.
ACCESSORY/FIOP STATIC PRESSURE (in. wg)* — 50TJ020-028 — ENGLISH
COMPONENT
Economizer
Glycol Coil
Electric Heat (kW)
26/34
32
42/56
55
56/75
80
CFM
5400
0.06
0.30
6000
0.07
0.35
7200
0.09
0.44
9000
0.11
0.58
10,000
0.12
0.66
11,250
0.14
0.77
0.08
0.08
0.11
0.11
0.14
0.14
0.09
0.09
0.12
0.12
0.15
0.15
0.11
0.11
0.15
0.15
0.20
0.20
0.15
0.15
0.19
0.19
0.24
0.24
0.17
0.17
0.21
0.21
0.26
0.26
0.20
0.20
0.24
0.24
0.29
0.29
LEGEND
FIOP — Factory-Installed Option
*The static pressure must be added to external static pressure. The sum and the
evaporator entering-air cfm should then be used in conjunction with the Fan Performance tables to determine blower rpm and watts.
ACCESSORY/FIOP STATIC PRESSURE (Pa)* — 50TJ020-028 — SI
COMPONENT
Economizer
Glycol Coil
Electric Heat (kW)
26/34
32
42/56
55
56/75
80
L/s
2549
15
75
2833
17
87
3399
22
110
4249
27
144
4721
30
164
5311
35
192
20
20
27
27
35
35
22
22
30
30
37
37
27
27
37
37
50
50
37
37
47
47
60
60
42
42
52
52
65
65
50
50
60
60
72
72
LEGEND
FIOP — Factory-Installed Option
*The static pressure must be added to external static pressure. The sum and the
evaporator entering-air L/s should then be used in conjunction with the Fan Performance tables to determine blower r/s and watts.
38
FAN RPM AT MOTOR PULLEY SETTINGS* — ENGLISH
UNIT
48/50TJ
016 (208/230, 380, 460 v)†
016 (208/230, 380, 460 v)**
016 (575 v)†
020†
020**
024†
024**
028†
028**
0
††
††
††
††
††
††
††
††
††
⁄
††
††
††
††
††
††
††
††
††
12
1
1179
1559
1429
1095
1287
1225
1458
1283
—
11⁄2
1150
1522
1403
1077
1265
1209
1434
1269
—
2
1121
1488
1376
1058
1243
1187
1407
1247
1551
MOTOR PULLEY TURNS OPEN
21⁄2
3
31⁄2
4
1093
1064
1035
1006
1455
1422
1389
1356
1349
1323
1296
1269
1040
1021
1002
984
1222
1200
1178
1156
1165
1143
1120
1098
1381
1354
1328
1301
1225
1203
1182
1160
1524
1497
1470
1443
41⁄2
978
1323
1242
965
1134
1076
1275
1138
1415
5
949
1289
1215
947
1112
1053
1248
1116
1388
51⁄2
920
1256
1188
928
1091
1031
1222
1095
1361
6
891
1227
1159
910
1069
1002
1193
1066
1332
41⁄2
16.30
22.05
20.70
16.09
18.90
17.93
21.25
18.97
23.58
5
15.82
21.48
20.25
15.78
18.54
17.55
20.80
18.60
23.13
51⁄2
15.33
20.93
19.80
15.47
18.18
17.18
20.37
18.25
22.68
6
14.85
20.45
19.32
15.16
17.81
16.70
19.88
17.77
22.20
*Approximate fan rpm shown.
†Indicates standard drive package.
**Indicates alternate drive package.
††Due to belt and pulley size, pulley cannot be set to this number of turns open.
FAN R/S AT MOTOR PULLEY SETTINGS* — SI
UNIT
48/50TJ
016 (208/230, 380, 460 v)†
016 (208/230, 380, 460 v)**
016 (575 v)†
020†
020**
024†
024**
028†
028**
0
††
††
††
††
††
††
††
††
††
⁄
††
††
††
††
††
††
††
††
††
12
1
19.65
25.98
23.82
18.25
21.45
20.42
24.30
21.38
—
11⁄2
19.17
25.37
23.38
17.95
21.09
20.15
23.90
21.15
—
2
18.68
24.80
22.93
17.64
20.72
19.78
23.45
20.78
25.85
MOTOR PULLEY TURNS OPEN
21⁄2
3
31⁄2
4
18.22
17.73
17.25
16.77
24.25
23.70
23.15
22.60
22.48
22.05
21.60
21.15
17.33
17.02
16.71
16.40
20.36
19.99
19.63
19.27
19.42
19.05
18.67
18.30
23.02
22.57
22.13
21.68
20.42
20.05
19.70
19.33
25.40
24.95
24.50
24.05
*Approximate fan rpm shown.
†Indicates standard drive package.
**Indicates alternate drive package.
††Due to belt and pulley size, pulley cannot be set to this number of turns open.
EVAPORATOR-FAN MOTOR PERFORMANCE
UNIT
48/50TJ
016
020
024
028
UNIT
VOLTAGE
208/230
380†, 460
575
208/230
380†, 460
575
208/230
380†, 460
575
208/230
380†, 460
575
MAXIMUM
ACCEPTABLE
CONTINUOUS
BHP*
4.25
4.25
3.45
MAXIMUM
ACCEPTABLE
CONTINUOUS
BkW*
3.17
3.17
2.57
MAXIMUM
ACCEPTABLE
OPERATING
WATTS
3,775
3,775
3,065
5.9
4.40
5,180
8.70
9.50
8.70
10.20
11.80
10.20
6.49
7.08
6.49
7.61
8.80
7.61
7,915
8,640
7,915
9,510
11,000
9,510
MAXIMUM
AMP DRAW
10.5
4.8
3.9
15.8
7.9
6.0
22.0
13.0
10.0
28.0
14.6
13.0
LEGEND
BHP — Brake Horsepower
BkW — Brake Kilowatts
*Extensive motor and electrical testing on these units ensures that the full horsepower (brake kilowatt)
range of the motors can be utilized with confidence. Using your fan motors up to the horsepower
(brake kilowatt) ratings shown in this table will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.
†50TJ units only.
NOTE: All indoor-fan motors 5 hp and larger meet the minimum efficiency requirements as established
by the Energy Policy Act of 1992 (EPACT) effective October 24, 1997.
39
Electrical data — 48TJ016-028
UNIT
48TJ
016
(15 Tons)
020
(18 Tons)
024
(20 Tons)
028
(25 Tons)
COMPRESSOR
VOLTAGE
NOMINAL
OFM
RANGE
VOLTAGE
No. 1
No. 2
(3 Ph, 60 Hz) Min Max RLA LRA RLA LRA Qty Hp FLA (ea)
208/230
187
253
28.8
195
28.8
195
3
0.5
1.7
460
414
508
14.7
95
14.7
95
3
0.5
0.8
575
518
633
10.8
80
10.8
80
3
0.5
0.8
208/230
187
253
30.1
225
28.8
195
3
0.5
1.7
460
414
508
15.5
114
14.7
95
3
0.5
0.8
575
518
633
12.1
80
10.8
80
3
0.5
0.8
208/230
187
253
37.8
239
30.1
225
2
1
6.6
460
414
508
17.2
125
15.5
114
2
1
3.3
575
518
633
12.4
80
12.1
80
2
1
3.4
208/230
187
253
41.0
350
37.8
239
2
1
6.6
460
414
508
21.8
158
17.2
125
2
1
3.3
575
518
633
17.3
125
12.4
80
2
1
3.4
LEGEND
FLA
— Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM
— Indoor (Evaporator) Fan Motor
LRA
— Locked Rotor Amps
MCA
— Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC
— National Electrical Code
OFM
— Outdoor (Condenser) Fan Motor
RLA
— Rated Load Amps
*Fuse or HACR circuit breaker.
IFM
Hp
FLA
POWER COMBUSTION
EXHAUST FAN MOTOR
FLA
—
4.6
—
3.7
4.8
2.3
—
3.0
3.9
2.1
—
5.0 15.8/15.8
4.6
—
5.0
7.9
2.3
—
5.0
6.0
2.1
—
7.5 25.0/25.0
4.6
—
7.5
13.0
2.3
—
7.5
10.0
2.1
—
10.0 28.0/28.0
4.6
—
10.0
14.6
2.3
—
10.0
13.0
2.1
3.7 10.5/11.0
LRA
—
18.8
—
6.0
—
4.8
—
18.8
—
6.0
—
4.8
—
18.8
—
6.0
—
4.8
—
18.8
—
6.0
—
4.8
FLA
0.57
0.57
0.30
0.30
0.57
0.57
0.57
0.57
0.30
0.30
0.57
0.57
0.57
0.57
0.30
0.30
0.57
0.57
0.57
0.57
0.30
0.30
0.57
0.57
POWER
SUPPLY
MCA
81/81
85/86
40
43
30
32
87/87
92/92
44
47
34
36
116/116
120/120
57
59
44
46
130/130
135/135
66
68
54
56
MOCP*
100/100
110/110
50
50
40
40
110/110
110/110
50
60
40
40
150/150
150/150
70
70
50
50
150/150
175/175
80
80
70
70
% Voltage Imbalance
max voltage deviation from average voltage
= 100 x
average voltage
EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
=
452 + 464 + 455
3
1371
3
= 457
NOTES:
1. In compliance with NEC requirements for multimotor and combination load
equipment (refer to NEC Articles 430 and 440), the overcurrent protective
device for the unit shall be fuse or HACR breaker. Canadian units may be
fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is
greater than 2%. Use the following formula to determine the percent voltage imbalance.
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 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.
40
Electrical data — 50TJ016-028
UNIT
50TJ
COMPRESSOR
VOLTAGE
NOMINAL
OFM
RANGE
VOLTAGE
No. 1
No. 2
(3 Ph, 60 Hz) Min Max RLA LRA RLA LRA Qty Hp FLA (ea) Hp
208/230
187
253
28.8
195
28.8
195
3
0.5
1.7
380
342
418
15.0
123
15.0
123
3
0.5
1.7
460
414
508
14.7
95
14.7
95
3
0.5
0.8
575
518
633
10.8
80
10.8
80
3
0.5
0.75
208/230
187
253
30.1
225
28.8
195
3
0.5
1.7
460
414
508
15.5
114
14.7
95
3
0.5
0.8
575
518
633
12.1
80
10.8
80
3
0.5
0.75
208/230
187
253
37.8
239
30.1
225
2
1
6.6
380
342
418
21.2
145
16.7
140
2
1
3.9
460
414
508
17.2
125
15.5
114
2
1
3.3
575
518
633
12.4
80
12.1
80
2
1
3.4
016
(15 Tons)
020
(18 Tons)
024
(20 Tons)
IFM
FLA
POWER
EXHAUST
FLA
—
4.6
—
4.6
3.7 10.5/11.0
—
4.6
—
4.6
—
2.3
—
3.7
3.9
2.3
—
2.3
—
2.3
—
2.3
3.7
4.8
—
2.3
—
2.3
—
2.1
3.0
3.9
—
2.1
—
4.6
—
4.6
5.0 15.8/15.8
—
4.8
—
4.6
—
2.3
—
2.3
5.0
7.9
—
2.3
—
2.3
—
5.0
6.0
2.1
—
4.6
—
4.6
7.5 25.0/25.0
—
4.6
—
4.6
—
2.3
—
7.5
15.0
2.3
—
2.3
—
2.3
—
2.3
7.5
13.0
—
2.3
—
2.3
—
7.5
10.0
2.1
LRA
—
18.8
—
18.8
—
18.8
—
18.8
—
6.0
—
6.0
—
6.0
—
6.0
—
6.0
—
6.0
—
6.0
—
4.8
—
4.8
—
18.8
—
18.8
—
18.8
—
18.8
—
6.0
—
6.0
—
6.0
—
6.0
—
4.8
—
18.8
—
18.8
—
18.8
—
18.8
—
6.0
—
6.0
—
6.0
—
6.0
—
6.0
—
6.0
—
6.0
—
4.8
ELECTRIC
HEAT*
kW
—
—
26/34
26/34
42/56
42/56
56/75
56/75
—
—
20
20
35
35
—
—
32
32
55
55
80
80
—
—
50
50
—
—
26/34
26/34
42/56
42/56
56/75
56/75
—
—
32
32
55
55
80
80
—
—
—
—
26/34
26/34
42/56
42/56
56/75
56/75
—
—
20
20
35
35
—
—
32
32
55
55
80
80
—
—
FLA
—
—
71/82
71/82
117/135
117/135
156/180
156/180
—
—
30
30
52
52
—
—
39
39
66
66
96
96
—
—
48
48
—
—
71/82
71/82
117/135
117/135
156/180
156/180
—
—
39
39
66
66
96
96
—
—
—
—
71/82
71/82
117/135
117/135
156/180
156/180
—
—
30
30
52
52
—
—
39
39
66
66
96
96
—
—
POWER
SUPPLY
MCA
81/81
85/86
102/116
108/122
159/149
165/155
169/194
175/200
43
45
43
46
70
73
40
43
55
58
72
75
102
105
30
32
65
67
87/87
92/92
109/122
114/128
166/155
172/161
176/200
182/206
44
47
59
61
76
79
106
109
34
36
116/116
120/120
120/134
126/140
178/166
183/172
187/211
193/217
66
68
66
68
84
87
57
59
65
68
82
85
112
115
44
46
MOCP*
100/100
110/110
110/125
110/125
175/175
175/175
200/225
200/225
50
60
50
60
80
80
50
50
60
60
80
80
110
110
40
40
70
70
110/110
110/110
110/125
125/150
175/175
175/175
200/225
200/225
50
60
60
70
90
90
125
125
40
40
150/150
150/150
150/150
150/150
200/175
200/175
200/225
200/225
80
80
80
80
90
90
70
70
70
70
90
90
125
125
50
50
41
Electrical data — 50TJ015-028 (cont)
UNIT
50TJ
028
(25 Tons)
COMPRESSOR
VOLTAGE
NOMINAL
OFM
RANGE
VOLTAGE
No. 1
No. 2
(3 Ph, 60 Hz) Min Max RLA LRA RLA LRA Qty Hp FLA (ea)
208/230
187
253
41.0
350
37.8
239
2
1
6.6
380
342
418
21.8
151
21.2
145
2
1
3.9
460
414
508
21.8
158
17.2
125
2
1
2.8
575
518
633
17.3
125
12.4
80
2
1
3.4
IFM
Hp
FLA
POWER
EXHAUST
FLA
—
4.6
—
4.6
10.0 28.0/28.0
—
4.6
—
4.6
—
2.3
—
10.0
17.0
2.3
—
2.3
—
2.3
—
2.3
10.0
14.6
—
2.3
—
2.3
—
10.0
13.0
2.1
LRA
—
18.8
—
18.8
—
18.8
−
18.8
—
6.0
—
6.0
—
6.0
—
6.0
—
6.0
—
6.0
—
6.0
—
4.8
ELECTRIC
HEAT*
kW
—
—
26/34
26/34
42/56
42/56
56/75
56/75
—
—
20
20
35
35
—
—
32
32
55
55
80
80
—
—
FLA
—
—
71/82
71/82
117/135
117/135
156/180
156/180
—
—
30
30
52
52
—
—
39
39
66
66
96
96
—
—
POWER
SUPPLY
MCA
130/130
135/135
130/138
135/143
181/170
187/176
191/215
197/221
73
76
73
76
87
90
66
68
67
70
84
87
114
117
54
56
MOCP†
150/150
175/175
150/150
175/175
200/175
200/200
200/225
200/225
90
90
90
90
90
90
80
80
80
80
90
100
125
125
70
70
LEGEND AND NOTES FOR ELECTRICAL DATA TABLES PAGES 41-42
FLA
HACR
IFM
LRA
MCA
MOCP
NEC
OFM
RLA
—
—
—
—
—
—
—
—
—
LEGEND
Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor (Evaporator) Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Outdoor (Condenser) Fan Motor
Rated Load Amps
*Heater capacity (kW) is based on heater voltage of 208 v, 240 v, 380 v,
480 v, and 600 v. Heaters are rated at 240 v, 480 v, or 600 v. If power
distribution voltage to unit varies from rated heater voltage, heater kW will
vary accordingly. To determine heater capacity at actual unit voltage, multiply 240 v, 480 v, or 600 v capacity by multipliers found in table on
page 7.
†Fuse or HACR circuit breaker.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load
equipment (refer to NEC Articles 430 and 440), the overcurrent protective
device for the unit shall be fuse or HACR breaker. The Canadian units
may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is
greater than 2%. Use the following formula to determine the percent of
voltage imbalance.
% Voltage Imbalance
= 100 x max voltage deviation from average voltage
average voltage
EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage = 452 + 464 + 455
3
1371
=
3
= 457
42
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.
3. MCA calculation for 50TJ016-028 units with electric heaters over 50 kW =
(1.25 x IFM amps) + (1.00 x heater FLA).
Typical piping and wiring — 48TJ016-028
(48TJ016 shown)
LEGEND
NEC — National Electrical Code
43
Typical piping and wiring — 50TJ016-028
(50TJ016 shown)
LEGEND
NEC — National Electrical Code
NOTES:
1. Illustration shown is a general guide only and is not intended to include all details for any specific
installation.
2. Installation must comply with all applicable codes.
3. A 90-degree elbow must be installed on the supply duct connection for units equipped with electric
heat.
44
Typical wiring schematic
(48TJ016, 208/230-v shown)
45
Typical wiring schematic —
(48TJ016, 208/230-v shown) (cont)
AHA
C
CAP
CB
CC
CLO
CLS
COMP
CR
CT
DM
DU
EC
EQUIP
FU
FPT
GND
HPS
HS
HV
I
IDM
IFC
IFM
IGC
L
LOR
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Adjustable Heat Anticipator
Contactor, Compressor
Capacitor
Circuit Breaker
Cooling Compensator
Compresor Lockout
Compressor Lockout Switch
Compressor Motor
Control Relay
Current Transformer
Damper Motor
Dummy Terminal
Enthalpy Control
Equipment
Fuse
Freeze Protection Thermostat
Ground
High-Pressure Switch
Hall Effect Sensor
High Voltage
Ignitor
Induced-Draft Motor
Indoor-Fan Contactor
Indoor-Fan Motor
Integrated Gas Unit Controller
Light
Lockout Relay
LEGEND
LPS
LS
MAT
MGV
OAT
OFC
OFM
PL
PRI
QT
R
RS
SW
TB
TC
TH
TRAN
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Low-Pressure Switch
Limit Switch
Mixed-Air Thermostat
Main Gas Valve
Outdoor-Air Thermostat
Outdoor-Fan Contactor
Outdoor-Fan Motor
Plug Assembly
Primary
Quadruple Terminal
Relay
Rollout Switch
Switch
Terminal Block
Thermostat, Cooling
Thermostat, Heating
Transformer
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Factory Wiring
Field Wiring
To indicate common potential only,
not to represent wiring.
NOTES:
1. Compressor and/or fan motor(s) thermally protected. Three phase motors protected
against primary single phasing conditions.
2. If any of the original wire furnished must be replaced, it must be replaced with
Type 90° C or its equivalent.
3. Jumpers are omitted when unit is equipped with economizer.
4. On 208/230-v unit TRAN1 is factory wired to ORN lead for 230-v power supply. If unit
is to run on 208-v power supply, TRAN1 must be rewired as follows: Disconnect the
BLK wire on TRAN1 and connect it to 208-v RED wire and insulate 230-v ORN wire.
5. The CLO locks out the compressor to prevent short cycling on compressor overload
and safety devices. Before replacing CLO, check these devices.
6. Number(s) indicate the line location of used contacts. A bracket over (2) numbers signifies a single-pole, double-throw contact. An underlined number signifies a normally
closed contact. Plain (no line) number signifies a normally open contact.
46
Typical wiring schematic —
(50TJ016, 460-v shown)
47
Typical wiring schematic —
(50TJ016, 460-v shown) (cont)
AHA
BRK W/AT
C
CAP
CB
CC
CLO
CLS
COMP
CT
DM
EQUIP
FL
FPT
FU
GND
HC
HPS
HTR
IFC
IFM
IFR
L
LLSV
LOR
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND
Adjustable Heat Anticipator
LPS
Breaks with Amp Turns
LS
Contactor, Compressor
MAT
Capacitor
OAT
Circuit Breaker
OFC
Cooling Compensator
OFM
Compresor Lockout
PL
Compressor Lockout Switch
PRI
Compressor Motor
QT
Current Transformer
SW
Damper Motor
TB
Equipment
TC
Fuse Link
TH
Freeze Protection Thermostat
TRAN
Fuse
Ground
Heater Contactor
High-Pressure Switch
Heater
Indoor-Fan Contactor
Indoor-Fan Motor
Indoor-Fan Relay
Light
Liquid Line Solenoid Valve
Lockout Relay
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Low-Pressure Switch
Limit Switch
Mixed-Air Thermostat
Outdoor-Air Thermostat
Outdoor-Fan Contactor
Outdoor-Fan Motor
Plug Assembly
Primary
Quadruple Terminal
Switch
Terminal Block
Thermostat, Cooling
Thermostat, Heating
Transformer
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Factory Wiring
Field Wiring
To indicate common potential only,
not to represent wiring.
Option/Accessory Wiring
NOTES:
1. Compressor and/or fan motor(s) thermally protected. Three phase motors protected
against primary single phasing conditions.
2. If any of the original wire furnished must be replaced, it must be replaced with
Type 90° C or its equivalent.
3. Jumpers are omitted when unit is equipped with economizer.
4. The CLO locks out the compressor to prevent short cycling on compressor overload
and safety devices. Before replacing CLO, check these devices.
5. Number(s) indicate the line location of used contacts. A bracket over (2) numbers signifies a single pole, double throw contact. An underlined number signifies a normally
closed contact. Plain (no line) number signifies a normally open contact.
48
Typical wiring schematic (cont)
NON-FUSED DISCONNECT
NOTES:
1. If the Service Option Package is ordered for size 016-028 units, the Non-Fused Disconnect shall be
factory-installed.
2. The Disconnect takes the place of TB-1 as shown on the unit wiring diagram label and the component arrangement label.
49
Controls
Operating sequence
Cooling, units without economizer — When thermostat calls for cooling, terminals G and Y1 are energized. The
indoor (evaporator) fan contactor (IFC) and compressor contactor no. 1 (C1) are energized, and evaporator-fan motor
(IFM), compressor no. 1 and condenser fan(s) start. The
condenser-fan motor(s) runs continuously while unit is cooling. When the thermostat calls for a second stage of cooling by energizing Y2, compressor contactor no. 2 (C2) is
energized and compressor no. 2 starts.
Heating, units without economizer (48TJ016-028)
NOTE: The 48TJ016-028 units have 2 stages of heat.
When the thermostat calls for heating, power is sent to
W on the IGC (integrated gas unit controller) board. An LED
(light-emitting diode) on the IGC board will be on during
normal operation. A check is made to ensure that the rollout switch and limit switch are closed. The induced-draft
motor is then energized, and when speed is proven with
the hall effect sensor on the motor, the ignition activation
period begins. The burners will ignite within 5 seconds.
If the burners do not light, there is a 22-second delay before another 5-second attempt. If the burners still do not
light, this sequence is repeated for 15 minutes. After the
15 minutes have elapsed, if the burners still have not lighted,
heating is locked out. To reset the control, break 24-v power
to the thermostat.
When ignition occurs the IGC board will continue to monitor the condition of the rollout and limit switches, the hall
effect sensor, as well as the flame sensor. If the unit is controlled through a room thermostat set for fan auto., 45 seconds after ignition occurs, the indoor-fan motor will be energized. If for some reason the overtemperature limit opens
prior to the start of the indoor fan blower, on the next attempt, the 45-second delay will be shortened to 5 seconds
less than the time from initiation of heat to when the limit
tripped. Gas will not be interrupted to the burners and heating will continue. Once modified, the fan on delay will not
change back to 45 seconds unless power is reset to the
control.
When additional heat is required, W2 closes and initiates
power to the second stage of the main gas valve. When the
thermostat is satisfied, W1 and W2 open and the gas valve
closes, interrupting the flow of gas to the main burners. If
the call for W1 lasted less than 1 minute, the heating cycle
will not terminate until 1 minute after W1 became active. If
the unit is controlled through a room thermostat set for fan
50
auto., the indoor-fan motor will continue to operate for an
additional 45 seconds then stop. If the overtemperature limit
opens after the indoor motor is stopped within 10 minutes
of W1 becoming inactive, on the next cycle the time will be
extended by 15 seconds. The maximum delay is 3 minutes.
Once modified, the fan off delay will not change back to
45 seconds unless power is reset to the control.
A LED indicator is provided on the IGC to monitor
operation. The IGC is located by removing the side panel
and viewing the IGC through the view port located in the
control box access panel. During normal operation, the LED
is continuously on.
Heating, units without economizer (50TJ016-028,
if accessory or optional heater is installed) — Upon
a call for heating through terminal W1, IFC and heater contactor no. 1 (HC1) are energized. On units equipped for
2 stages of heat, when additional heat is needed, HC2 is
energized through W2.
Cooling, units with economizer — Upon a call for cooling, when outdoor ambient is above the temperature control setting, the economizer damper moves to VENT position. The compressors and evaporator and condenser fans
energize.
Upon a first call for cooling, when outdoor ambient is
below the temperature control setting, the evaporator fan
starts and the economizer opens to maintain 53 F leavingair temperature. The compressors remain off.
Upon a second-stage call for cooling, compressor no. 1
is energized and mechanical cooling is integrated with economizer cooling. If the outdoor-air temperature drops below
50 F, a cooling lockout switch prevents the compressors
from running.
When supply-air temperature drops below a fixed set point,
the economizer damper modulates to maintain the temperature at the fixed set point.
Freeze protection thermostats (FPT) are located on the
evaporator coil. They detect frost build-up and turn the
compressors off locking them out and requiring a manual
reset. Once frost has melted, the compressors can be
reenergized.
Heating, units with economizer — Outdoor-air damper
stays at VENT position while evaporator fan is operating.
Refer to Heating, Units Without Economizer (48TJ016028) and Heating, Units Without Economizer (50TJ016028, If Accessory or Optional Heater is Installed) sections
on this page for remainder of operating sequence.
INDOOR-AIR QUALITY AND APOLLO CONTROLS WIRING
*Filter status switch and humidity sensor cannot function simultaneously. Only one sensor can be wired.
†Such as a CO2 sensor.
**Set auxiliary option to ‘‘2’’ — IAQ Control per VTS or
VVT Installation Instructions.
CO2
COM
DX
HVAC
IAQ
LED
MIN.
NC
OAT
R.V.
SAT
TEMP
TRAN
VTS
VVTT
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND
Carbon Dioxide
Common
Direct Expansion Coil Sensor
Heating, Ventilation, and Air Conditioning
Indoor-Air Quality
Light-Emitting Diode
Minimum
Normally Closed
Outdoor-Air Thermostat
Reversing Valve
Supply-Air Temperature Sensor
Temperature
Transformer
Carrier TEMP System
Variable Volume and Temperature
51
Controls (cont)
TYPICAL SMOKE CONTROL/FIRE SHUTDOWN WIRING — 48TJ016-028
OPEN ON E
CLOSED ON BP
OPEN
ON BP
EAS
CLOSED ON
BP,SP,E
OPEN
ON SD
COMPRESSOR WIRING
SWITCH CLOSES
ON BP,SP,E
See Legend on page 46.
*Included in power exhaust accessory.
NOTE: All switches are field supplied.
OPERATING MODES
BP — Building Pressurization:
E
— Evacuation:
SD — Complete Unit Shutdown:
SP — Smoke Purge:
52
Evaporator fan on, economizer energized to fully open position, power
exhaust disabled.
Evaporator fan off, economizer energized to fully open position, power
exhaust on (open).
Breaks 24-v power to the thermostat.
Evaporator fan on, economizer energized to fully open position, power
exhaust on.
* EMC
TYPICAL SMOKE CONTROL/FIRE SHUTDOWN WIRING — 50TJ016-028
LEGEND
Field Wiring
Field-Supplied Switch
See Legend on page 48.
*Included in power exhaust accessory.
OPERATING MODES
BP — Building Pressurization:
E
— Evacuation:
SD — Complete Unit Shutdown:
SP — Smoke Purge:
Evaporator fan on, economizer energized to fully open position, power
exhaust disabled.
Evaporator fan off, economizer deenergized to fully closed position,
power exhaust on (open).
Breaks 24-v power to thermostat.
Evaporator fan on, economizer energized to fully open position, power
exhaust on.
53
Controls (cont)
TEMP systems
A TEMP System is a network of communicating Carrier
TEMP System Thermostats and rooftop, factory-mounted
Apollo direct digital controls, each serving its own zone and
heating/cooling unit. Networking allows your building manager to easily access each of your systems from a single
location...whether they are in the same building or located
throughout town.
The TEMP System’s inherently flexible, modular base design supports the exact number of independent, single zone
systems you require...no more, no less, no compromises.
Ideal for department stores, small office buildings, fast
food chains, schools, and hotels, a TEMP System is a
cost-effective way to maintain comfortable building
environments.
NOTE: Unit temperature rise must not be exceeded for
proper unit operation.
STANDARD UNIT TYPICAL FIELD THERMOSTAT WIRING
LEGEND
TB — Terminal Block
54
Variable Volume/Variable Temperature VVTt
Systems
VVT Systems are dedicated to total building comfort.
Carrier thermostats, zone dampers, and HVAC equipment
with factory-mounted direct digital controls continually monitor and adjust their operation to ensure uninterrupted and
personalized comfort for all occupants.
Through the use of communicating electronic controls,
VVT Systems are able to provide the comfort of a multiple
zone system while using the installation, operating and maintenance economics of single zone equipment...virtually putting an end to the cost vs comfort compromise.
NOTE: Unit temperature rise must not be exceeded for
proper unit operation.
55
Controls (cont)
ratings on page 7 for minimum heating cfm required for
proper operation of the rooftop heating system. These minimum heating cfm levels must be maintained during all phases
of heating operation. The heating cfm values take precedence over listed minimum cooling cfm values.) This permits the use of constant volume rooftop units on VVT applications. Without the bypass damper, the restriction of the
zone dampers that are closing at partial loads will reduce
the airflow through the unit to below the minimum levels.
The installer is responsible for ensuring that the bypass
controller is configured and the system is balanced so that
the minimum airflow is higher than 300 cfm/ton (40 L/s
per kW). To accomplish proper configuration set the System Setup Enable Function (Category 5, option 7) to ON.
This will close the bypass damper and force all of the zone
dampers to open. The air balance should be completed after the zones minimum airflow has been set, verifying the
total airflow through the equipment is above the minimum
airflow level.
VVT bypass design layout — Particular attention must
be given to bypass duct layout. It has been a source of VVT
system operating problems when neglected. Proper layout
consists of the five factors:
1. Proper location of the bypass
2. Adequately sizing the bypass
3. Avoiding short-circuiting of supply and return air
4. Proper location of the static pickup
5. Facilitating the mixing of bypass air with return air
VVTt application guidelines
General — The VVT system is a zoning system that allows
a single-zone heating/cooling system to operate as a multiplezone system. For this system to function correctly and not
adversely affect the reliability of the heating/cooling system, the information provided here must be followed.
There are two parts of the VVT system installation that
are important for successful operation: the bypass damper
and the HVAC (Heating, Ventilation, and Air-Conditioning)
equipment configuration settings. The following information will provide important details for these two items as
well as specific instructions for the 48/50TJ rooftop units.
This information is intended as a supplement to the Installation Instructions shipped with both the 33CS system controls and the 48/50TJ rooftop equipment.
Bypass damper — The bypass damper and controller serve
to accomplish two functions in the VVT system. First, the
bypass damper keeps supply duct pressure and velocity down
at partial load. This permits the VVT system to utilize standard low-velocity, low-pressure supply ductwork, duct insulation, and duct sealing methods. Without the bypass damper,
the restriction of the zone dampers that are closing at partial loads would cause duct static pressure to climb, adding
stress to all supply duct materials. Accompanying velocity
and noise would create problems in the conditioned space.
Second, when the bypass damper is set up correctly, it
ensures that the airflow through the HVAC equipment remains above the minimum required levels. (See capacity
VVT BYPASS DESIGN
CEILING PLENUM LAYOUT FOR MANUFACTURING OFFICE
STATIC PRESSURE SENSOR
AND BYPASS DAMPER ACTUATOR
ROOFTOP
UNIT
BYPASS DAMPER WITH SHORT
DUCT - SUPPORT PROPERLY
AIM BYPASS DAMPER DISCHARGE
AWAY FROM RETURN INLET
STATIC
PRESSURE
TUBING
5-CONDUCTOR
SHIELDED
CABLE (24V)
T
MONITOR
THERMOSTAT
BC
BYPASS
CONTROLLER
MOUNT BYPASS CONTROLLER
ON THE WALL NEXT TO THE
MONITOR THERMOSTAT
56
AVOID RETURN GRILLES IN
CLOSE PROXIMITY TO BYPASS
DISCHARGE AIR PATH
LOCATE PICKUP IN AREA OF LEAST TURBULENCE,
5 DUCT DIAMETERS DOWNSTREAM OF BYPASS
TAKEOFF BUT UPSTREAM OF FIRST ZONE TAKEOFF
OR MAJOR JUNCTION
STATIC
PRESSURE
PICKUP
The recommended location of the bypass damper is for
it to duct the bypass air either into the ceiling plenum or
into unoccupied spaces. See figure below for a typical installation. This method of installation prevents interference
with intended fresh air intake through the unit and economizer operation.
It is highly recommended that the bypass damper is not
ducted between the supply duct and the return duct as shown
in the diagram below. This type of installation may result in
the return duct becoming pressurized causing many problems such as:
• Preventing intended fresh intake for ventilation from entering the unit.
• Preventing proper operation of the economizer and causing mechanical cooling to energize needlessly.
• Preventing proper mixing of bypass air and return air resulting in low return temperatures in cooling, and high
return temperature in heating.
If the diversity within the space does not vary much, then
bypass can be installed as shown in the diagram above successfully. Care must be taken to ensure that maximum bypass air at part load conditions does not exceed 25% of the
full load airflow.
The bypass junction must be installed with sufficient duct
length between it and the unit to allow complete mixing of
the bypass air an the return air. Wihout adequate mixing,
comfort control will be lost as the equipment will be cycled
off and equipment failures may result if left at the extremes.
When the HVAC equipment uses an economizer, a backdraft damper needs to be installed between the connection
of the bypass duct and the closet room return air grille.
Monitor thermostat configuration — The monitor thermostat controls the operation of its own zone and of each
associated zone controller. The monitor thermostat determines system operation from the information received from
each device that it controls. The monitor thermostat must
be configured for proper control of the system. Part of the
configuration is Category 4.0, which deals with HVAC settings. The Category 4.0 HVAC Equipment table shows the
default settings for this category.
NOTE: In the majority of cases only categories 4.5, 4.6,
4.7, 4.8 and 4.15 will require changing by the installer.
Leaving-air temperature (LAT) monitoring must be always used. This function prevents the HVAC equipment
from operating in a range that will cause equipment safety
trips, leading to shortened equipment life.
The Constant Volume Electric Cooling/Heating and the
Constant Volume Electric Cooling/Gas Heating tables provide the recommended cooling and heating limits that the
monitor thermostat configures for 4.5, First Stage Cooling
Limit; 4.6, Second Stage Cooling Limit; 4.7, First Stage
Heating Limit; and 4.8, Second Stage Heating Limit.
There are tradeoffs involved in the selection of the system mode demand, monitor thermostat configurations 4.15.
Lower setting levels tend to improve comfort but tend to
increase operating costs and reduce equipment reliability.
Buildings that have large core areas that are likely to make
a call when others are not should use lower system mode
demand levels. For buildings with zones that have more similar load patterns from zone to zone, or smaller zones or
more uniformly sized zones, a higher setting should be used.
VVT BYPASS DESIGN
DUCTED RETURN LAYOUT FOR MANUFACTURING OFFICE
LOCATE RETURN/BYPASS JUNCTION
A MINIMUM OF 15 FT. FROM
UNIT OUTLET
ROOFTOP
UNIT
RETURN BACKDRAFT
DAMPER
AVOID THE TEMPTATION
TO INSTALL A SHORT-CIRCUIT
BYPASS HERE. IT WILL CAUSE
NUISANCE TRIPS WITH ZONE
CAPACITY INTERRUPTION
BYPASS
DAMPER
*
STATIC PRESSURE
SENSOR AND BYPASS
DAMPER ACTUATOR
5-CONDUCTOR
SHIELDED
CABLE (24V)
* SIZE BYPASS DUCT TO HANDLE
100% OF BLOCK PEAK CFM AT
1000 FPM OR LESS
T
LOCATE PICKUP IN AREA OF LEAST TURBULENCE,
5 DUCT DIAMETERS DOWNSTREAM OF BYPASS
TAKEOFF BUT UPSTREAM OF FIRST ZONE TAKEOFF
OR MAJOR JUNCTION
BC
STATIC
PRESSURE
TUBING
STATIC
PRESSURE
PICKUP
57
Controls (cont)
CATEGORY 4.0 HVAC EQUIPMENT —
DEFAULT SETTINGS
SETTING
DESCRIPTION
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
Fan Operation
Time GuardT Device between modes
Time Guard Device Override
LAT Monitoring
First Stage Cooling Limit (F)
Second Stage Cooling Limit
First Stage Heating Limit
Second Stage Heating Limit
Auxiliary Relay (0= No Control,
1=Occupied Schedule, 2=IAQ,
3=Reversing Valve, 4=Economizer)
Optimize Staging
Cooling Temperature lockout
Cooling Lockout Set Point
Heating Temperature Lockout
Heating Lockout Set Point
System Mode Demand
System Mode Re-Select (minutes)
Minimum Heat Run Time
Minimum Cool Run Time
Pre-occupancy Purge
Fan Switch (0=Thermostat Switch Position,
1=Fan Switch On, 2=Fan Switch Off)
Cool Switch (0=Thermostat Switch Position,
1=Cool Switch Auto, 2=Cool Switch Off)
Heat Switch (0=Thermostat Switch Position,
1=Heat Switch Auto, 2=Heat Switch Off)
4.10
4.11
4.12
4.13
4.14
4.15
4.16
4.17
4.18
4.19
4.20
4.21
4.22
CURRENT
DEFAULT
Off
On
Off
On
70 F
60 F
97 F
110 F
0
On
On
45 F
Off
60 F
3
30
5
3
Off
0
These units use a TXV metering device.
Electrical connection from the VVT system to the units
will be the typical thermostat connections from the relay
pack to the unit.
Refer to the tables below for LAT set points.
CONSTANT VOLUME (CV)
ELECTRIC COOLING/HEATING
UNIT
50TJ
HEATER
kW
016
020
024
028
32
55
80
32
55
80
32
55
80
32
55
88
F
60
60
60
70
70
70
70
70
70
70
70
70
HVAC SETTINGS
4.7
4.8
F
C
F
C
93 33.9 107 41.7
95 35.0 126 52.2
114 45.6 147 63.9
93 33.9 107 41.7
103 39.4 126 52.2
114 45.6 147 63.9
93 33.9 107 41.7
103 39.4 126 52.2
114 45.6 147 63.9
90 32.2 100 37.8
97 36.1 115 46.1
108 42.2 135 57.8
0
CONSTANT VOLUME ELECTRIC
COOLING/GAS HEATING (F)
0
UNIT
DX coil sensor installation — The use of a DX coil sensor is recommended. The DX temperature sensor should
be installed in the ductwork as close to the equipment as
possible. Care must be taken not to have the sensor within
9line of site9 of the equipment’s heating elements. Radiation from the heat can cause the sensor to read an elevated
reading.
The majority of the units referred to by these application
guidelines are two compressor units. The monitor thermostat has the ability to read only one DX coil sensor, which
can only be installed within the equipment on a single compressor unit. All of the LAT settings have been determined
assuming supply duct temperatures versus coil temperatures. Be sure the DX coil sensor option is turned on. Category 5.6 under the monitor configurations, should be ON.
48/50TJ application guidelines — The 48/50TJ units
are constant volume units and will require the use a bypass
damper and controller. Refer to page 56 for details regarding the use and installation of the bypass damper.
58
CATEGORY 4.0
4.6
C
F
C
15.6 59 15.0
15.6 59 15.0
15.6 59 15.0
21.1 59 15.0
21.1 59 15.0
21.1 59 15.0
21.1 60 15.6
21.1 60 15.6
21.1 60 15.6
21.1 59 15.0
21.1 59 15.0
21.1 59 15.0
4.5
48TJD016
48TJF016
48TJD020
48TJF020
48TJD024
48TJF024
48TJD028
48TJF028
4.5
60
60
70
70
70
70
70
70
CATEGORY 4.0 HVAC SETTINGS
4.6
4.7
59
112
59
123
59
112
59
116
60
112
60
116
59
112
59
116
4.8
125
140
125
130
125
130
125
130
Application data
Ductwork
Minimum temperature (48TJ016-028 only)
Ductwork should be attached to the curb on all units. Interior installation may proceed before unit is set in place on
roof. If ductwork will be attached to the unit, do not drill in
condensate drain pan area — leaks may result. See figures
on page 60 for information on field-installed concentric ductwork when applicable.
Air entering the heat exchanger in heating must be a
minimum of 50 F (10 C) continuous and 45 F (7.2 C)
intermittent.
Electric heat (50TJ016-028 only)
On 50TJ016-028 units with electric heat, a field-supplied
90-degree elbow must be installed on the supply ductwork
below the unit discharge connection.
Thru-the-curb service connections
Roof curb connections allow field power wires, control
wires, and gas supply (48TJ) to enter through the roof curb
opening.
Thermostat
Use of 2-stage cooling thermostat is recommended for all
units. A 2-stage cooling thermostat is required on units with
accessory economizer to provide integrated cooling.
Heating-to-cooling changeover
All units are automatic changeover from heating to cooling
when automatic changeover thermostat and subbase are
used.
Airflow
Units are draw-thru on cooling and blow-thru on heating.
Maximum airflow
To minimize the possibility of condensate blow-off from
evaporator, airflow through units should not exceed
500 cfm/nominal ton (67.1 L/s per kW) on size 016024 units, and 11,250 cfm (5311 L/s) on size 028 units.
Minimum airflow
The minimum airflow for cooling is 300 cfm/nominal ton
(40 L/s per kW) on size 016-024 units and 280 nominal
cfm/ton (38 L/s per kW) on size 028 units. Refer to ARI
Heating Capacities and Efficiencies table on page 7 for minimum airflow cfm for heating on size 016-028 units.
Minimum ambient cooling operation
temperature
Units are designed to operate at outdoor temperatures down
to 40 F (4.4 C). To operate at lower outdoor-air temperatures, see Price Pages or contact your local Carrier representative for appropriate accessory combinations for specific applications.
Maximum operating outdoor-air temperature
For cooling, this temperature is 120 F (49 C) for 016 and
020 sizes, 125 F (52 C) for 024 size, and 121 F (49 C) for
028 size. Refer to the cooling Capacity tables on pages
25-28 for further details.
Internal unit design
Due to Carrier’s internal unit design (draw-thru over the motor), air path, and specially designed motors, the full horsepower (maximum continuous bhp) listed in the Physical Data
table and the notes following each Fan Performance table
can be utilized with extreme confidence.
Using Carrier motors with the values listed in the Physical and Fan Performance Data tables will not result in
nuisance tripping or premature motor failure. The unit
warranty will not be affected.
Apollo direct digital communicating controls
The Apollo direct digital controls must be used with either a
Carrier master or monitor thermostat.
Condenser coil protection (Enviro-Shield™)
Precoated aluminum-fin coils have a durable epoxyphenolic coating applied to the fin prior to the fin stamping
process to provide protection in mildly corrosive coastal environments. Precoated coils have an inert barrier between
the aluminum fin and copper tube. This barrier electrically
disconnects the dissimilar metals to minimize the potential
for galvanic corrosion. This economical option provides substantial corrosion protection beyond the standard uncoated
coil construction.
Copper-fin coils provide increased corrosion resistance
in moderate coastal environments where industrial air
pollution is not present. All copper coils eliminate bi-metallic
construction to eliminate the potential for galvanic corrosion. Application in industrial environments is not recommended due to potential attack from sulfur, sulfur oxide,
nitrogen oxides, carbon and several other industrial airborne contaminants. In moderate seacoast environments,
copper-fin coils have extended life compared to standard
or precoated aluminum-fin coils.
Postcoated aluminum-fin coils have a durable organic
coating uniformly applied over all coil surfaces. Postcoated
coils provide superior protection since all coil surfaces are
completely encapsulated from atmospheric contamination.
Specify postcoated aluminum-fin coils for industrial environments with high levels of air pollution. This option also
provides better protection than standard or precoated
aluminum-fin coils in industrial environments.
Postcoated copper-fin coils have a durable organic coating uniformly applied over all coil surfaces. This option combines the natural salt and corrosion resistance of all-copper
construction with the highest level of corrosion protection.
Specify postcoated copper-fin coils in the harshest combination of coastal and industrial environments.
High altitude (48TJ016-028 only)
A change to the gas orifice may be required at high altitudes. Refer to Altitude Compensation charts on page 36.
59
Application data (cont)
CONCENTRIC DUCT AIR DISTRIBUTION
NOTE: Do not drill in this area, damage to basepan may result in
water leak.
CONCENTRIC DUCT DETAILS
Shaded area indicates block-off panels.
NOTE: Dimensions A, A8 and B, B8 are obtained from field-supplied ceiling diffuser.
Concentric ducts may only be installed on units without electric
heat. Personal injury or unit damage may result.
60
Guide specifications — 48/50TJ016-028
Packaged Rooftop Electric Cooling
Unit with Gas, Electric, or Glycol Heat —
Constant Volume Application
HVAC Guide Specifications
Size Range: 15 to 25 Tons, Nominal (Cooling)
172,000 to 360,000 Btuh, Nominal
(Input Heating) (Gas Units)
26 to 80 kW (Electric Heat)
123,000 to 405,000 Btuh
(Glycol Heating)
Carrier Model Numbers: 48TJD, 48TJF
50TJ
Part 1 — General
1.01 SYSTEM DESCRIPTION
Unit is an outdoor rooftop mounted, electrically controlled heating and cooling unit utilizing scroll hermetic compressors for cooling duty and gas combustion for heating duty. Supply air shall be discharged
downward or horizontally (with horizontal supply/
return curb adapter assembly), as shown on contract
drawings. Standard unit shall include a manual outdoorair inlet.
1.02 QUALITY ASSURANCE
A. Unit (016-024) shall be rated in accordance with ARI
Standards 270 and 360 and all units shall be designed in accordance with UL Standard 1995.
NOTE: The 48/50TJ028 is beyond the scope of the
ARI certification program.
B. Unit shall be designed to conform to ASHRAE 15.
C. Unit shall be ETL and ETL, Canada tested and certified in accordance with ANSI Z21.47 Standards as
a total package.
D. Roof curb shall be designed to conform to NRCA
Standards.
E. Insulation and adhesive shall meet NFPA 90A requirements for flame spread and smoke generation.
F. Unit casing shall be capable of withstanding
500-hour salt spray exposure per ASTM B117
(scribed specimen).
G. Unit shall be manufactured in a facility registered to
ISO 9002/BS5750, Part 2.
1.03 DELIVERY, STORAGE, AND HANDLING
Unit shall be stored and handled per manufacturer’s
recommendations.
Part 2 — Products
2.01 EQUIPMENT (STANDARD)
A. General:
The 48/50TJ unit shall be a factory assembled, singlepiece heating and cooling unit. Contained within the
unit enclosure shall be all factory wiring, piping, controls, refrigerant charge (R-22), and special features
required prior to field start-up.
B. Unit Cabinet:
1. Unit cabinet shall be constructed of galvanized steel,
bonderized and coated with a prepainted baked
enamel finish.
2. Indoor blower compartment interior surfaces shall
be insulated with a minimum 1⁄2-in. (13 mm) thick,
1 lb (.45 kg) density neoprene cooled, fiberglass
insulation coated on the air side. Aluminum foilfaced fiberglass insulation shall be used in the gas
heat compartment.
3. Cabinet panels shall be easily removable for
servicing.
4. Filters shall be accessible through an access panel.
5. Holes shall be provided in the base rails for rigging shackles to facilitate overhead rigging.
6. Unit shall have a factory-installed internal condensate drain connection and a sloped condensate pan.
C. Fans:
1. Indoor blower (evaporator fan):
a. Fan shall be belt driven. Belt drive shall include an adjustable pulley. The standard fan
drive shall have a factory-installed low-medium
static pressure fan drive. The alternate fan
drive option shall have a factory-installed high
static pressure fan drive.
b. Fan wheel shall be made from steel with a
corrosion resistant finish. It shall be a dynamically balanced, double-inlet type with forwardcurved blades.
2. Condenser fans shall be of the direct-driven propeller type, with corrosion-resistant blades riveted
to corrosion-resistant steel supports. They shall be
dynamically balanced and discharge air upwards.
3. Induced-draft blower shall be of the direct-driven,
single inlet, forward-curved, centrifugal type. It shall
be made from steel with a corrosion-resistant finish and shall be dynamically balanced.
D. Compressor(s):
1. Fully hermetic, scroll type, internally protected.
2. Factory spring-shock mounted and internally spring
mounted for vibration isolation.
3. On electrically and mechanically independent refrigerant circuits.
E. Coils:
1. Standard evaporator and condenser coils shall have
copper or aluminum plate fins mechanically bonded
to seamless internally grooved copper tubes with
all joints brazed.
2. Optional precoated aluminum-fin coils shall have
a durable epoxy-phenolic coating to provide protection in mildly corrosive coastal environments.
Coating shall be applied to the aluminum fin stock
prior to the fin stamping process to create an inert barrier between the aluminum fin and copper
tube. Epoxy-phenolic barrier shall minimize galvanic action between dissimilar metals.
3. Copper-fin coils shall be constructed of copper fins
mechanically bonded to copper tubes. All copper
construction shall provide protection in moderate
coastal applications.
61
Guide specifications — 48/50TJ016-028 (cont)
F.
G.
H.
I.
62
4. Postcoated aluminum-fin coils shall have a durable
organic coating uniformly applied over all coil surfaces. Coating shall be deep brown color applied
by a dip and bake process to ensure complete encapsulation of all coil surfaces. Coated coil shall
withstand 1,000 hour salt spray in accordance with
ASTM (U.S.A.) B117. Coil construction shall be
aluminum fins mechanically bonded to copper tubes.
5. Postcoated copper-fin coils shall have a durable
organic coating uniformly applied over all coil surfaces. Coating shall be deep brown color applied
by a dip and bake process to ensure complete encapsulation of all coil surfaces. Coated coil shall
withstand 1,000 hour salt spray in accordance with
ASTM (U.S.A.) B117. Coil construction shall be
copper fins mechanically bonded to copper tubes.
Heating Section (48 Series Units):
1. Induced-draft combustion type with energy saving
direct-spark ignition system and redundant main
gas valve.
2. The heat exchanger shall be of the tubular-section
type constructed of a minimum of 20-gage steel
coated with a nominal 1.2 mil aluminum-silicone
alloy for corrosion resistance.
3. Burners shall be of the in-shot type constructed of
aluminum-coated steel.
4. All gas piping shall enter the unit at a single
location.
Refrigerant Components:
Refrigerant circuit components shall include:
1. Thermostatic expansion valve (TXV).
2. Filter driers.
3. Gage port and connections on suction, discharge,
and liquid lines.
Filter Section:
Standard filter section shall consist of 2 sizes of factoryinstalled 2-in. (51 mm) thick throwaway fiberglass filters of commercially available sizes.
Controls and Safeties:
1. Unit Controls:
a. Economizer control (optional)
b. Capacity control (2-step)
c. Unit shall be complete with self-contained lowvoltage control circuit.
2. Safeties:
a. Unit shall incorporate a solid-state compressor lockout which provides reset capability
at the space thermostat, should any of the
following safety devices trip and shut off
compressor:
1) Compressor lockout protection provided
for either internal or external overload.
2) Low-pressure switch.
3) Freezestats (evaporator coil).
4) High-pressure switch.
b. Supply-air thermostat shall be located in the
unit.
c.
J.
K.
L.
M.
*
Heating section (48 Series) shall be provided
with the following minimum protections:
1) High-temperature limit switch.
2) Induced-draft motor speed sensor.
3) Flame rollout switch.
4) Flame proving controls.
5) Redundant gas valve.
Operating Characteristics:
1. Unit shall be capable of starting and running at
120 F ambient outdoor temperature per maximum load criteria of ARI Standard 360.
2. Unit with standard controls will operate in cooling down to an outdoor ambient temperature of
40 F (4.4 C).
3. Unit shall be provided with fan time delay to prevent cold air delivery.
Electrical Requirements:
All unit power wiring shall enter unit cabinet at a
single location.
Motors:
1. Compressor motors shall be cooled by refrigerant
gas passing through motor windings and shall
have line break thermal and current overload
protection.
2. All fan motors shall have permanently lubricated,
sealed bearings and inherent automatic-reset thermal overload protection or manual reset calibrated
circuit breakers.
3. All indoor-fan motors 5 hp and larger shall meet
the minimum efficiency requirements as established by the Energy Policy Act of 1992 (EPACT)
effective October 24, 1997.
Special Features:
Certain features are not applicable when the features
designated * are specified. For assistance in amending the specifications, contact your local Carrier Sales
Office.
1. Direct Digital Communicating Controls:
a. Shall be available as a factory-installed option.
b. Shall actively monitor all modes of operation, as well as evaporator-fan status, filter
status, indoor-air quality, supply-air temperature, and outdoor-air temperature.
c. Shall work with Carrier TEMP and VVTt
systems.
d. Shall have built-in diagnostics for thermostat
commands for both staged heating and cooling, evaporator-fan operation, and economizer operation.
e. Shall be equipped with a 5-minute time delay between modes of operation.
2. Roof Curbs (Horizontal and Vertical):
a. Formed of 16-gage galvanized steel with wood
nailer strip and shall be capable of supporting entire unit weight.
b. Permits installing and securing ductwork to
curb prior to mounting unit on the curb.
*
*
*
*
*
*
3. Horizontal Adapter Roof Curb:
Includes factory-assembled adapter and duct
and substantially improves evaporator fan static
performance.
4. Integrated Economizer:
a. Integrated type capable of simultaneous economizer and compressor operation to provide
cooling with outdoor air.
b. Equipped with low-leakage dampers not to
exceed 3% leakage, at 1.0 in. wg (249 Pa)
pressure differential.
c. Capable of introducing up to 100% outdoor
air.
d. Equipped with dry-bulb temperature control
to govern economizer changeover.
e. Equipped with a mixed-air sensor that controls the economizer to a 55° F (30.5° C)
control point.
5. Two-Position Damper:
Two-position damper package shall include single
blade damper and motor. Admits up to 25% outdoor air, and shall close upon unit shutoff.
6. Accessory Compressor Cycle Delay:
Compressor shall be prevented from restarting
for a minimum of 5 minutes after shutdown.
7. Thermostats and Subbases:
To provide staged heating and cooling in addition to automatic (or manual) changeover and fan
control.
8. Barometric Relief Damper Package:
a. Package shall include damper, seals, hardware, and hoods to relieve excess internal
pressure.
b. Damper shall close due to gravity upon unit
shutdown.
9. Power Exhaust:
Package shall include an exhaust (propeller style)
fan, 1⁄2 Hp 208-230, 460 v (factory-wired for
460 v) motor, and damper for vertical flow units
with economizer to control overpressurization of
building.
10. Head Pressure Control Package:
Consists of an accessory outdoor-air package and
a solid-state control with condenser coil temperature sensor for controlling condenser-fan motor
speed to maintain condensing temperature between 90 F (32.2 C) and 100 F (43.3 C) at outdoor ambient temperature down to −20 F
(−29.8 C).
11. Low-Ambient Kits:
When used, allows units to operate at lower outdoor ambient temperatures.
12. Enthalpy Sensor:
a. For use with economizer only.
b. Capable of comparing heat content (temperature and humidity) of outdoor air and indoor
*
13.
*
14.
15.
16.
17.
air and controlling economizer cut-in point at
the most economical level.
NOTE: Two accessory enthalpy sensors are
required for differential enthalpy control.
Remote Control Panel:
Panel shall be a decorative, indoor, wall-mounted
panel consisting of:
a. Two-stage heat/2-stage cool thermostat.
b. Automatic changeover.
c. System switch with HEAT-COOL-AUTO.OFF settings.
d. Fan switch with ON-AUTO. settings.
e. Ventilation control for remote variation of the
amount of outdoor-air intake.
f. Indicator lights for HEAT-COOL-FAN
operation.
g. Three unused indicator lights for field use.
Electronic Programmable Thermostat:
Capable of using deluxe full-featured electronic
thermostat.
Winter Start Time-Delay Relay:
Used in conjunction with the accessory lowambient kit or head pressure control device, permits operation in cooling at lower outdoor ambient temperatures. See price pages for more
information.
Liquid Propane Conversion Kit (48 Series):
Kit shall contain all the necessary hardware and
instructions to convert a standard natural gas unit
for use with liquified propane gas.
Service Option Package:
a. Hinged access panels for the filter, compressors, evaporator fan, and control box areas.
Filter hinged access panels permit tool-less
entry for changing filters. Evaporator fan hinged
access panel shall be field-convertable to a
tool-less entry by removing and discarding
screws. Each external hinged access panel
shall be permanently attached to the rooftop
unit.
b. Convenience outlet: Shall be factory-installed
and internally-mounted with an externally accessible 115-v, 15 amp. GFI, female receptacle with hinged cover. Voltage required to
operate convenience outlet shall be provided
by a field-installed separate branch circuit.
c. Non-fused disconnect switch: Shall be factoryinstalled, internally-mounted, NEC and UL approved non-fuse switch shall provide unit power
shutoff. The control access door shall be interlocked with the non-fused disconnect. The
disconnect switch must be in the OFF position to open the control box access door. Shall
be accessible from outside the unit and shall
provide power off lockout capability.
63
Guide specifications — 48/50TJ016-028 (cont)
1.625 in. ODM) copper stubs for sweat connections. Coil shall be furnished with suitable support rails, end plates, and hardware for ready field
installation in heater compartment.
21. Alternate Drive:
Shall provide higher static drive capability to enhance evaporator-fan performance rpm range.
22. Hail Guard, Condenser Coil Grille:
Shall protect the condenser coil from hail, flying
debris, and damage by large objects without increasing unit clearances.
18. Service Valves:
Shall provide positive isolation ball-type suction
and discharge valves with gage port connections.
19. Electric Heater Package (50 Series Units Only):
Fully assembled for installation. The packages are
designed in accordance with UL standards and
all units feature a single point connection.
20. Glycol Coil (50 Series Units Only):
Coil shall be 2-row copper tube (1⁄2-in. OD) with
aluminum plate fins (590 fins/m; 15 fins/in.) and
(41.28 mm; 1.625 in. OD) copper headers. Input and output connections shall be 41.28 mm;
Carrier Corporation • Syracuse, New York 13221
9-98
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 1
Tab 1a 1b
New
Book 1
1
Tab OP1b OP2b
Page 64
Catalog No. 524-802
Printed in U.S.A.
PC 111
Form 48/50TJ-1PD
Replaces: New
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