Product Data - AHI Carrier

Product
Data
50TJ016-028
Single-Package Rooftop Units
Electric Cooling
with Electric Heat Option
50 Hz
Nominal Capacity: 52.8 to 87.9 kW
(15 to 25 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 62-99
(IAQ)
• Fifty-one mm (2-in.) air filters
• Heating options:
— Electric heat
— Hydronic glycol heating coil
Features/Benefits
Every compact one-piece
unit arrives fully assembled,
charged, tested, and ready to
run.
Durable, dependable
construction
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
(U.S.A.) 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 condenser-fan
motors and permanently lubricated
bearings provide additional unit
dependability.
Copyright 2000 Carrier Corporation
Form 50TJ-C11PD
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 48) 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, fieldsupplied P-trap.
Factory- and field-installed electric
heaters are available in a wide range of
capacities.
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. Fifty-one mm (2-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
accessory enthalpy controls available
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 secondstage cooling is called for, the no. 1
compressor is energized in addition to
the economizer. If the outdoor-air 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™ 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
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 (lowmedium static) and alternate (high static) drive is available for these units.
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), supply-air temperature, and
outdoor-air temperature.
Table of contents
Page
Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11
Base Unit Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12,13
Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-16
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17,18
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-32
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Typical Wiring Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35-38
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39-47
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48-50
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51-54
Features/Benefits (cont)
The Apollo communicating controls
are factory-installed into the unit control box, and come equipped with builtin 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 VVT® (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 the
Carrier Comfort Network (CCN) building control systems if required. This
system gives the unit thermostats the
flexibility to communicate with almost
any thermostat or Carrier Control Network (CCN) system.
Additional data points may be accessed when a third party EMS system
utilizing a DataPORT™ or DataLINK™
device is connected to the CCN port of
a master thermostat. The data points
that are Read/Write may be forced by
the user to change operating parmeters. Refer to the Points Display table
in the Application Data section on
page 49 for additional information and
a list of accessible data points.
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.
Model number nomenclature
50
TJ
–
024
Z
50 – Cooling Only/Cooling with
Optional Electric Heat
–
–
9
7 3 YA
Factory-Installed Options*
Packaging
3 – Export
TJ – Constant Volume
Design Series
0 – Original
7 – Copeland scroll
8 – Two Outdoor Fans (50TJ016 Only)
Nominal Tons
016 – 52.8 kW (15 Tons)
024 – 70.3 kW (20 Tons)
028 – 87.9 kW (25 Tons)
Voltage
8 – 220-3-50
9 – 400-3-50
Service/Control Options
- – Standard Controls
Z – Apollo Controls
Coil Protection Options
- – Al/Cu Condenser & Evaporator
B – Cu/Cu Condenser & Evaporator
C – Cu/Cu Condenser & Al/Cu Evaporator
E – E-Coated Al/Cu Condenser Coil
F – E-Coated Cu/Cu Condenser Coil
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.
3
Capacity ratings
COOLING OPERATING RANGE
UNIT
50TJ
016
024
028
MINIMUM
L/s
2125
2800
3300
MAXIMUM*
cfm
4500
6000
7000
L/s
3525
4800
5300
cfm
7,500
10,000
11,250
*Operation at these levels may be limited by entering evaporator air wet bulb temperatures. See
Cooling Capacities tables on pages 19-22 for further details.
ELECTRIC RESISTANCE HEATER DATA (400-3-50 Units Only)
UNIT
50TJ
016
024
028
380
20.3
34.5
50.0
20.3
34.5
50.0
20.3
34.5
50.0
HEATER kW
Unit Voltage
400
22.5
38.2
55.4
22.5
38.2
55.4
22.5
38.2
55.4
416
24.3
41.1
59.7
24.3
41.1
59.7
24.3
41.1
59.7
HEATER
STAGES
% HEAT
PER STAGE
MAXIMUM
STAGES*
2
2
2
2
2
2
2
2
2
50/50
67/33
50/50
50/50
67/33
50/50
50/50
67/33
50/50
2
3
4
2
3
4
2
3
4
MINIMUM
HEATING AIRFLOW
L/s
cfm
2124
4500
2832
6000
3303
7000
*Maximum number of stages using accessory low-ambient kit or head pressure control device and low-ambient kit.
NOTE: Heaters are rated at nominal voltage of 400-3-50 and are available on 400-3-50 units only. For rating of heater at unit nameplate voltage refer to
correct column of table.
4
Physical data — SI
UNIT 50TJ
016
52.8
NOMINAL CAPACITY (kW)
OPERATING WEIGHT (kg)
COMPRESSOR
Quantity...Model (Ckt 1, Ckt 2)
Capacity Stages (%)
Number of Refrigerant Circuits
Oil (ml) (Ckt 1, Ckt 2)
REFRIGERANT TYPE
Expansion Device
Operating Charge (kg)
Circuit 1*
Circuit 2
CONDENSER COIL
2...ZR108KC
50/50
2
3135
4.81
4.81
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
2...669
2.02
Rows...Fins/m
Total Face Area (sq m)
EVAPORATOR FAN
Quantity...Size (mm)
Type Drive
Nominal L/s
Motor kW
Motor Nominal r/s
2...669
1.63
Maximum Continuous BkW
Motor Frame Size
Fan r/s Range
Motor Bearing Type
Maximum Allowable r/s
Motor Pulley Pitch Diameter (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 Setting
Factory Speed Setting (r/s)
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)
Al
BkW
Cu
DEC
TXV
—
—
—
—
—
LEGEND
Aluminum
Brake Kilowatts
Copper
Design Enhancement Center
Thermostatic Expansion Valve
2...254 x 254
Belt
2832
2.76
28.8
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
Low-Medium Static
High Static
3.17
56H
12.38-16.38
17.05-21.67
Ball
25.8
79/104
94/119
22
152
132
30
1...BX...1067
1...BX...1067
343-394
.80
.92
5
5
3.5
13.58
18.43
028
(Standard)
70.3
87.9
For Operating Weights, see page 7
Scroll
1...ZR16M3, 1...ZR125KC 1...ZR19M3, 1...ZR16M3
55/45
55/45
2
2
4022, 3135
4022, 4022
R-22
TXV
024
028
(High-Static DEC Option)
87.9
1...ZR19M3, 1...ZR16M3
55/45
2
4022, 4022
6.76
9.07
9.07
5.72
6.03
6.03
Cross-Hatched 3/8-in. Copper Tubes, Aluminum Lanced,
Aluminum Pre-Coated, or Copper Plate Fins
3...590
4...590
4...590
2.02
2.02
2.02
Propeller Type
Propeller Type
6700
8600
2...762
2...762
0.75...17.9
3.73...17.9
3400
7800
Cross-Hatched 3/8-in. Copper Tubes, Aluminum Lanced
or Copper Plate Fins, Face Split
3...590
4...590
4...590
1.63
1.63
1.63
Centrifugal Type
2...305 x 305
2...305 x 305
2...305 x 305
Belt
Belt
Belt
3776
4720
4720
5.59
7.46
7.46
29.1
29.0
29.0
9.92 (400 v),
9.92 (400 v),
7.68
8.60 (220 v)
8.60 (220 v)
213T
215T
215T
12.8-15.2
14.8-17.8
14.8-17.8
16.6-20.3
18.6-22.4
18.6-22.4
Ball
Ball
Ball
25.8
25.8
25.8
140/165
125/150
125/150
137/168
125/150
125/150
35
35
35
239
203
203
201
163.0
163.0
36.5
36.5
36.5
1...BX...1372
2...BX...1270
2...BX...1270
1...BX...1270
2...BX...1194
2...BX...1194
371-391
371-391
371-391
.47
.60
.60
.62
.75
.75
5
5
5
6
5
5
3
3
3
13.75
16.01
16.01
18.42
20.08
20.08
2951
2206
186
303
–1 ± 2
7±2
Cleanable
2...508 x 635 x 25
1...508 x 508 x 25
Throwaway†
4...508 x 508 x 50
4...406 x 508 x 50
*Circuit 1 uses the lower portion of condenser coil and lower portion of evaporator
coils, and Circuit 2 uses the upper portion of both coils.
†The 50TJ028 units requires 50-mm industrial-grade filters capable of handling
face velocities of up to 3.2 m/s (such as American Air Filter no. 5700 or
equivalent).
5
Physical data — English
UNIT 50TJ
016
15
NOMINAL CAPACITY (tons)
OPERATING WEIGHT (lbs)
COMPRESSOR
Quantity...Model (Ckt 1, Ckt 2)
Capacity Stages (%)
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...ZR108KC
50/50
2
106
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
2...17
21.7
Rows...Fins/in.
Total Face Area (sq ft)
EVAPORATOR FAN
Quantity...Size (in.)
Type Drive
Nominal Cfm
Motor Hp
Motor Nominal Rpm
2...17
17.5
Maximum Continuous Bhp
Motor Frame Size
Fan Rpm Range
Motor Bearing Type
Maximum Allowable Rpm
Motor Pulley Pitch Diameter (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 Setting
Factory Speed Setting (Rpm)
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.)
Al
Bhp
Cu
DEC
TXV
6
—
—
—
—
—
LEGEND
Aluminum
Brake Horsepower
Copper
Design Enhancement Center
Thermostatic Expansion Valve
2...10 x 10
Belt
6000
3.7
1438
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
Low-Medium Static
High Static
4.25
56H
743-983
1023-1300
Ball
1550
3.1/4.1
3.7/4.7
7/8
6.0
5.2
13/16
1...BX...42
1...BX...42
13.5-15.5
48
55
5
5
3.5
815
1106
028
(Standard)
20
25
For Operating Weights, see page 7
Scroll
1...ZR16M3, 1...ZR125KC 1...ZR19M3, 1...ZR16M3
55/45
55/45
2
2
136, 106
136, 136
R-22
TXV
024
028
(High-Static DEC Option)
25
1...ZR19M3, 1...ZR16M3
55/45
2
136, 136
14-14
20-0
20-0
12-10
13-5
13-5
Cross-Hatched 3/8-in. Copper Tubes, Aluminum Lanced,
Aluminum Pre-Coated, or Copper Plate Fins
3...15
4...15
4...15
21.7
21.7
21.7
Propeller Type
Propeller Type
14,200
8600
2...30
2...762
1...1075
3.73...17.9
3400
7800
Cross-Hatched 3/8-in. Copper Tubes, Aluminum Lanced
or Copper Plate Fins, Face Split
3...15
4...15
4...15
17.5
17.5
17.5
Centrifugal Type
2...12 x 12
2...12 x 12
2...12 x 12
Belt
Belt
Belt
8000
10,000
10,000
7.5
10
10
1455
1450
1450
13.3 (400 v),
13.3 (400 v),
10.3
11.5 (220 v)
11.5 (220 v)
213T
215T
215T
769- 909
888-1069
888-1069
994-1216
1114-1341
1114-1341
Ball
Ball
Ball
1550
1550
1550
5.5/6.5
4.9/5.9
4.9/5.9
5.4/6.6
4.9/5.9
4.9/5.9
13/8
13/8
13/8
10.4
8.0
8.0
7.9
6.4
6.4
17/16
17/16
17/16
1...BX...54
2...BX...50
2...BX...50
1...BX...50
2...BX...47
2...BX...47
14.6-15.4
14.6-15.4
14.6-15.4
28
36
36
37
45
45
5
5
5
6
5
5
3
3
3
825
960
960
1105
1205
1205
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
*Circuit 1 uses the lower portion of condenser coil and lower portion of evaporator
coils, and Circuit 2 uses the upper portion of both coils.
†The 50TJ028 units requires 2-in. industrial-grade filters capable of handling face
velocities of up to 625 ft/min (such as American Air Filter no. 5700 or equivalent).
Physical data (cont)
OPERATING AND RIGGING WEIGHTS
UNIT
50TJ
016
lb
1560
BASE UNIT OPERATING WEIGHTS*
024
kg
lb
kg
lb
708
1800
816
1950
028
kg
885
*Base unit weight does not include electric heaters, copper coils, economizer, power exhaust,
barometric relief or crating. See Options and Accessory Weights table below for more
information.
NOTE: For export crating add 500 lb (227 kg).
OPTION AND ACCESSORY WEIGHTS
OPTION/ACCESSORY
Electric Heater
Cu Condenser Coil
Cu Condenser and Evaporator Coils
Economizer
Barometric Relief Damper
Power Exhaust
Roof Curb (14-in. curb)
Horizontal Adapter Curb (pre-assembled)
Horizontal Adapter Cube (field-assembled)
Hail Guard
Glycol Coil
016
lb
50
150
280
110
50
85
200
250
343
60
144
kg
23
68
127
50
23
39
91
113
156
27
65
OPTION/ACCESSORY WEIGHTS
024
lb
kg
50
23
150
68
280
127
110
50
50
23
85
39
200
91
250
113
343
156
60
27
144
65
028
lb
50
150
280
110
50
85
200
250
343
60
144
kg
23
68
127
50
23
39
91
113
156
27
65
LEGEND
Cu — Copper
7
Options and accessories
ITEM
Apollo Direct Digital Communicating Controls
Service Option Package
Integrated Economizer
Electric Heat** (400-3-50 Units Only)
Enviro-Shield™ Condenser Coil Options
Hail Guard Condenser Coil Grille
Alternate Drive
Electronic Programmable Thermostat
25% Open Two-Position Damper
Barometric Relief Damper**
Roof Curbs
Horizontal Adapter Curb
Thermostats and Subbases
Power Exhaust**
Low-Ambient Kit
Winter Start Time-Delay Relay
Motormaster® III Head Pressure Control (Speed Control)
Time Guard® II Control Circuit
Accusensor™ III Enthalpy Sensor
Hydronic Glycol Coil
OPTION*
X
X
X
X
X
ACCESSORY†
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
*Factory-installed.
†Field-installed.
**Not available with horizontal adapter curb.
NOTE: Refer to 50TJ product ordering data or contact your local representative for accessory and
option package information.
HEAD PRESSURE CONTROL
The 50TJ016-028 standard units are designed to operate in cooling at outdoor temperatures down to 40 F (4.4 C). With accessory Motormaster III control (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 product ordering data or contact
your local Carrier representative for appropriate accessory combinations for
desired outdoor ambient temperature operation.
MOTORMASTER III CONTROL
8
ACCUSENSOR™ III
(Enthalpy and Differential Enthalpy Control)
FACTORY-INSTALLED APOLLO
COMMUNICATING CONTROLS
+
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 indoor-air
quality. They are designed to work in conjunction with Carrier
TEMP and VVT® (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 solidstate enthalpy sensor for differential enthalpy sensing for all units).
CARRIER COMMERCIAL THERMOSTAT
ELECTRONIC PROGRAMMABLE
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.
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.
TIME GUARD® 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.
9
Options and accessories (cont)
ELECTRIC HEATERS
BAROMETRIC RELIEF/POWER EXHAUST
Electric heaters (and single point kits) are available in a wide
range of capacities for factory or field installation. Electric heaters are available on 400-3-50 units only.
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
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 protection 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
ENVIRONMENT*
DESCRIPTION
(Enviro-Shield Option)
Standard, Al/Cu
Pre-Coated Al/Cu
Cu/Cu
E-Coated Al/Cu
E-Coated Cu/Cu
Al/Cu
Cu/Cu
Enviro-Shield
Pre-Coated
—
—
—
—
Standard,
Non-Corrosive
Mild
Coastal
Moderate
Coastal
Severe
Coastal
Combined
Coastal and
Industrial
X
X
X
X
X
LEGEND
Aluminum Fin with Copper Tube Coil
Copper Fin with Copper Tube Coil
Family of Coil Protection Options
Epoxy Coating Applied to Fin Stock Material
*See “Selection Guide: Environmental Corrosion Protection” Catalog No. 811-217 for more information.
10
Industrial
X
SERVICE OPTION PACKAGE*
UNIT-MOUNTED DISCONNECT HINGED ACCESS PANEL (CONTROL BOX SHOWN)
Factory-installed, internally-mounted, NEC (National Electrical
Code, U.S.A.) and UL (Underwriters’ Laboratories, U.S.A.) 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.
*These options are also available individually through the DEC.
11
Base unit dimensions — 50TJ016
NOTES:
1. Refer to print for roof curb accessory dimensions.
2. Dimensions in ( ) are in millimeters.
3.
4.
Center of Gravity.
Direction of airflow.
5. Ductwork to be attached to accessory roof curb only.
6. Minimum clearance:
• Rear, 7′-0″ (2134) for coil removal. This dimension can
be reduced to 4′-0″ (1219) if conditions permit coil
removal from the top.
• Left side: 4′-0″ (1219) for proper condenser coil
airflow.
• Front, 4′-0″ (1219) for control box access.
• Right side: 4′-0″ (1219) for proper operation of damper
and power exhaust if so equipped.
• Top, 6′-0″ (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 6, a
removable fence or barricade requires no clearance.
8. Dimensions are from outside of corner post. Allow 0′-5/16″
(8) on each side for top cover drip edge.
9. A 90 degree elbow must be installed on the supply
ductwork below the unit discharge for units
equipped with electric heaters.
UNIT
50TJ016
12
STD. UNIT ECONOMIZER CORNER CORNER CORNER CORNER
WEIGHT
WEIGHT
A
B
C
D
1560 lbs
110 lbs
392 lbs
366 lbs
387 lbs
416 lbs
708 kg
50 kg
178 kg
166 kg
176 kg
188 kg
DIM A
DIM B DIM C
ft-in. (mm)
3-5
3-6
1-8
(1041) (1067)
(508)
Base unit dimensions — 50TJ024,028
LEGEND
KO — Knockout
NOTES:
1. Dimensions in ( ) are in millimeters.
2.
Center of gravity.
3.
Direction of airflow.
4. Ductwork to be attached to accessory roof curb only.
5. Minimum clearance:
a. Rear: 7′-0″ (2134) for coil removal. This dimension
can be reduced to 4′-0″ (1219) if conditions permit
coil removal from the top.
b. Left side: 4′-0″ (1219) for proper condenser coil
airflow.
c. Front: 4′-0″ (1219) for control box access.
d. Right side: 4′-0″ (1219) for proper operation of
damper and power exhaust (if so equipped).
e. Top: 6′-0″ (1829) to assure proper condenser fan
operation.
f. Local codes or jurisdiction may prevail.
6. With the exception of clearance for the condenser coil
and the damper/power exhaust as stated in Note 5, a
removable fence or barricade requires no clearance.
7. Dimensions are from outside of corner post. Allow
0′-5/16″ (8) on each side for top cover drip edge.
8. A 90 degree elbow must be installed on the supply
ductwork below the unit discharge for units
equipped with electric heaters.
UNIT
50TJ
024
028
(Standard)
028
(High Static Option)
Lb
423
Kg
192
CORNER WEIGHT*
B
C
Lb
Kg
Lb
Kg
412
185
490
220
441
200
416
189
533
242
560
254
3-1
940
3-6
1067
441
200
416
189
553
251
580
263
3-1
940
3-6
1067
A
DIMENSIONS
D
X
Y
Lb
475
Kg
213
Ft-in.
3-3
mm
991
Ft-in.
3-7
mm
1092
*Weights are for unit only (aluminum plate fins) and do not include options or crating.
13
Accessory dimensions
HORIZONTAL AND VERTICAL ROOF CURBS AND HORIZONTAL ADAPTER CURB
NOTES:
1. Roof curb accessory is shipped unassembled.
2. Insulated panels, 1″ 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.
5. Roof curb: 16 ga. (VA03-56) steel.
COMPR SECT.
CRRFCURB010A00
CURB
HEIGHT
1′-2″
(305)
CRRFCURB011A00
2′-0″
(610)
PKG. NO. REF.
CRRBCURB012A00
14
2′-0″
(610)
LEGEND
— Compressor Section
DESCRIPTION
Standard curb
14” high
Standard curb for
units requiring
high installation
Side supply and
return curb for
high installation
DIMENSIONS (degrees and inches)
UNIT
50TJ
A
DEG.
.28
B
IN.
.45
DEG.
.28
UNIT LEVELING TOLERANCES*
*From edge of unit to horizontal.
IN.
.43
HORIZONTAL SUPPLY/RETURN ADAPTER INSTALLATION
NOTE: CRRFCURB013A00 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.
CRRFCURB013A00
CURB
HEIGHT
1′-11″
(584)
DESCRIPTION
Pre-Assembled, High Static,
Horizontal Adapter
BAROMETRIC RELIEF/POWER EXHAUST
2'-1 5/8"
(650.9)
2'-2 1/16"
(662)
1'-6 5/16"
(465.1)
15
Accessory dimensions (cont)
FACTORY-INSTALLED NON-FUSED DISCONNECT
COMPRESSOR
SECTION DOOR
TOP
CONTROL BOX
SECTION DOOR
DISCONNECT
HANDLE
2'-5 1/4"
(743)
FRONT VIEW
16
1'-1 11/16" (347)
Selection procedure
(with 50TJ016 example) — SI
I Determine cooling and heating requirements at
design conditions:
Given:
Cooling Capacity Required. . . . . . . . . . . . . . . 48 kW
Sensible Heating Capacity . . . . . . . . . . . . . . . 34 kW
Condenser Entering-Air Temperature . . . . . 35 C Edb
Evaporator Entering-Air
Temperature . . . . . . . . . . . 26.7 C Edb/19 C Ewb
Evaporator Air Quantity. . . . . . . . . . . . . . . 2833 L/s
External Static Pressure . . . . . . . . . . . . . . . . .164 Pa
Heating Capacity . . . . . . . . . . . . . . . . . . . . . 22 kW
Power Supply (V-Ph-Hz) . . . . . . . . . . . . . . 400-3-50
II Select unit
capacity.
based
on
required
cooling
Entering cooling capacity table for 50TJ016 on
page 19 at condenser entering dry bulb temperature
35 C, air entering evaporator at 2833 L/s, 26.7 C
edb and 19 C ewb. The 50TJ016 unit will provide a
total cooling capacity of 52.6 kW, and a sensible heating capacity of 38.5 kW. For evaporator-air temperature other than 26.7 C 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 electric heat.
Heating load required is 22 kW. Enter the Electric Resistance Heater Data table on page 4 for the 50TJ016
at 400-3-50. The 22.5 kW electric heater most closely
satisfies the heat required.
IV Determine fan speed and motor horsepower
requirements at design conditions.
Before entering the Fan Performance tables, calculate
the total static pressure required based on unit components. From the given find:
External static pressure . . . . . . . . . . . . . . . 164 Pa
22.5 kW Heater static pressure. . . . . . . . . 22 Pa
Total static pressure . . . . . . . . . . . . . . . . . . 186 Pa
Enter Fan Performance table for unit 50TJ016 on
page 24, at 2833 L/s and 186 Pa external static pressure. By interpolation, find that the fan speed is
17.8 r/s and the watts are 2640.
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 = 2640
Determine net cooling capacity using the following
formula:
Net capacity = Gross capacity – IFM heat
= 52.6 kW – 2.64 kW
= 50.0 kW
Net sensible capacity = 38.5 kW – 2.64 kW
= 35.9 kW
As demonstrated above, the 50TJ016 with a standard
motor and standard low-medium static drive, and a
22.5 kW electric heater meets the cooling capacity,
sensible heating capacity, and heating capacity requirements, and is the correct choice for the given
conditions.
NOTE: To obtain more sensible cooling, increase
quantity of air entering evaporator.
Enter Accessory/FIOP Static Pressure table on page 31
at selected unit size and heater kW. Find that at given air
quantity (2833 L/s), pressure loss is 22 Pa.
17
Selection procedure
(with 50TJ016 example) — English
I Determine cooling and heating requirements at
design conditions:
Given:
Cooling Capacity Required. . . . . . . . . .168,000 Btuh
Sensible Heating Capacity . . . . . . . . . .118,000 Btuh
Condenser Entering-Air Temperature . . . . . 95 F Edb
Evaporator Entering-Air
Temperature . . . . . . . . . . . . . 80 F Edb/67 F Ewb
Evaporator Air Quantity. . . . . . . . . . . . . . . 6000 cfm
External Static Pressure . . . . . . . . . . . . . .0.66 in. wg
Heating Capacity . . . . . . . . . . . . . . . . .76,000 Btuh
Power Supply (V-Ph-Hz) . . . . . . . . . . . . . . 400-3-50
II Select unit
capacity.
based
on
required
cooling
Entering cooling capacity table for 50TJ016 on
page 21 at condenser entering dry bulb temperature
95 F, air entering evaporator at 6000 cfm, 80 F edb
and 67 F ewb. The 50TJ016 unit will provide a total
cooling capacity of 180,000 Btuh, and a sensible heating capacity of 131,000 Btuh. For evaporator-air temperature 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 electric heat.
Heating load required is 76,000 Btuh.
76,000 Btuh
= 22,274 Watts of heat required.
3.413 Btu/W
=
22.3 kW
Enter the Electric Resistance Heater Data table on
page 4 for the 50TJ016 at 400-3-50. The 22.5 kW
electric heater most closely satisfies the heat required.
IV Determine fan speed and motor horsepower
requirements a design conditions.
Enter Accessory/FIOP Static Pressure table on page 31
at selected unit size and heater kW. Find that at given air
quantity (6000 cfm), pressure loss is 0.09 in. wg.
18
Before entering the Fan Performance tables, calculate
the total static pressure required based on unit components. From the given find:
External static pressure . . . . . . . . . . . . . .0.66 in. wg
22.5 kW Heater static pressure . . . . . . . 0.09 in. wg
Total static pressure. . . . . . . . . . . . . . . . .0.75 in. wg
Enter Fan Performance table for unit 50TJ016 on
page 27, at 6000 cfm and 0.75 in. wg external static
pressure. By interpolation, find that the fan speed is
1011 rpm and the watts are 2633.
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 = 2633
Determine net cooling capacity using the following
formula:
Net capacity = Gross capacity – IFM heat
= 180,000 – 2633 Watts
(3.413 Btuh/Watt)
= 180,000 Btuh – 8986 Btuh
= 171,014 Btuh
Net sensible capacity = 131,000 Btuh – 8986 Btuh
= 122,014 Btuh
As demonstrated above, the 50TJ016 with a standard
motor and standard low-medium static drive, and a
22.5 kW electric heater, satisfies the cooling capacity,
sensible heating capacity, and heating capacity requirements, and is the correct choice for the given
conditions.
NOTE: To obtain more sensible cooling, increase
quantity of air entering evaporator.
Performance data
COOLING CAPACITIES — SI
50TJ016 (52.8 kW)
Temp (C)
Air Entering
Condenser
(Edb)
24
29
35
40.5
46
49
52
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
2124/0.12
17
49.0
41.6
11.3
47.6
40.8
12.7
46.0
40.0
14.1
43.5
38.2
15.7
40.8
36.5
17.4
39.0
35.4
18.4
37.2
34.2
19.3
19
53.3
35.5
11.7
51.7
34.7
13.0
50.1
33.8
14.5
47.3
32.4
16.2
44.4
31.0
17.9
42.4
30.0
18.9
40.5
29.0
19.7
2478/0.14
22
58.7
28.8
13.3
56.5
28.2
14.7
54.9
27.4
16.3
51.8
26.2
18.1
48.7
24.9
18.4
46.6
24.0
19.4
44.2
23.8
20.3
17
50.3
45.1
11.5
49.0
44.0
12.8
47.4
43.1
14.3
44.7
41.2
15.9
41.9
39.5
17.6
40.0
38.3
18.5
38.1
36.9
19.4
19
54.9
37.8
11.9
53.3
37.1
13.2
51.5
36.2
14.6
48.5
34.7
16.3
45.5
33.2
18.0
43.5
32.1
19.0
41.4
31.1
19.9
Evaporator Air Quantity — L/s / BF
2832/0.15
3186/0.17
Evaporator Air — Ewb (C)
22
17
19
22
17
19
22
60.3
51.8
56.5
61.3
52.8
57.1
61.9
30.6
47.5
40.1
32.0
50.2
43.1
34.7
13.4
11.6
12.0
13.5
11.7
12.0
13.6
58.1
50.2
54.4
59.7
51.2
55.5
60.3
29.7
46.7
39.3
31.2
49.4
41.4
33.1
14.9
12.9
13.3
15.0
13.0
13.4
15.1
56.5
48.5
52.6
57.6
49.4
53.3
58.7
28.9
45.9
38.5
30.3
48.5
40.6
31.5
16.5
14.4
14.7
16.6
14.5
14.9
16.7
52.9
45.7
49.5
53.9
46.6
50.3
55.0
27.6
44.0
36.8
28.9
46.4
38.9
30.0
18.3
16.0
16.4
18.4
16.1
16.5
18.5
49.9
42.7
46.4
50.5
43.9
47.1
51.0
26.3
42.2
35.3
27.6
44.1
37.2
28.7
18.6
17.7
18.1
18.7
17.9
18.3
18.7
47.7
40.9
44.3
48.4
42.0
45.0
48.8
25.3
40.7
34.3
26.7
42.3
36.3
27.8
19.6
18.7
19.1
19.8
18.8
19.2
19.8
—
39.1
42.2
—
40.2
42.9
—
—
39.2
33.1
—
40.5
35.0
—
—
19.6
20.1
—
19.7
20.1
—
3540/0.18
17
53.9
52.7
11.7
52.1
51.7
13.1
50.4
50.4
14.6
47.7
47.9
16.2
44.9
45.2
18.0
43.0
43.4
18.9
41.2
41.5
19.9
19
57.6
45.2
12.1
56.0
44.2
13.5
54.4
42.8
15.0
51.0
41.0
16.6
47.6
39.2
18.3
45.5
37.9
19.3
43.3
36.6
20.1
22
62.4
36.6
13.6
61.3
33.8
15.2
59.2
33.0
16.8
55.5
31.4
18.6
51.9
30.5
18.8
49.6
29.5
19.8
—
—
—
50TJ024 (70.3 kW)
Temp (C)
Air Entering
Condenser
(Edb)
24
29
35
40.5
46
52
BF
Edb
Ewb
kW
SHC
TC
—
—
—
—
—
—
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
2832/0.075
17
64.3
55.1
15.1
62.1
54.0
16.7
59.8
53.0
18.5
57.0
51.6
20.3
54.2
50.2
22.1
51.2
48.7
24.0
19
70.9
46.5
15.6
68.5
45.4
17.2
65.9
44.4
19.0
63.0
43.3
20.8
59.9
42.0
22.7
56.6
40.7
24.6
3304/0.085
22
76.9
36.9
16.5
74.3
36.0
18.2
71.6
35.0
20.1
68.5
33.9
22.0
65.2
32.8
23.9
—
—
—
17
65.9
59.5
15.2
63.6
58.4
16.9
61.2
57.1
18.7
58.4
55.8
20.5
55.6
54.3
22.3
52.7
52.3
24.2
19
72.7
49.7
15.8
70.2
48.8
17.4
67.4
47.7
19.2
64.4
46.5
21.0
61.2
45.3
22.8
57.6
43.8
24.7
Evaporator Air Quantity — L/s / BF
3776/0.100
4248/0.110
Evaporator Air — Ewb (C)
22
17
19
22
17
19
22
78.8
67.2
74.1
80.3
68.4
75.0
81.3
38.9
63.6
53.0
40.8
67.2
56.0
42.8
16.7
15.4
15.9
16.9
15.5
16.0
17.0
76.1
64.9
71.4
77.5
66.0
72.3
78.5
38.0
62.4
51.9
39.9
65.6
54.8
41.7
18.5
17.0
17.6
18.6
17.2
17.7
18.7
73.2
62.4
68.6
74.4
63.8
69.4
75.3
37.0
61.0
50.7
38.9
63.7
53.6
40.6
20.3
18.8
19.3
20.4
19.0
19.4
20.5
70.0
59.7
65.3
71.1
61.4
66.1
71.9
35.9
59.3
49.4
37.7
61.3
52.6
39.5
22.2
20.6
21.1
22.3
20.8
21.2
22.4
66.6
57.1
62.1
67.6
58.7
62.7
68.3
34.7
56.9
48.3
36.5
58.6
51.1
38.3
24.1
22.5
23.0
24.2
22.7
23.1
24.3
—
54.3
58.4
—
55.9
59.0
—
—
54.2
47.0
—
55.7
49.6
—
—
24.4
24.9
—
24.6
25.0
—
LEGEND
Bypass Factor
Entering Dry Bulb Temperature (C)
Entering Wet Bulb Temperature (C)
Compressor Input (kW)
Sensible Heat Capacity (kW)
Total Capacity (kW)
NOTES:
1. Ratings are gross, and do not account for the effects of the
evaporator-fan 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 + [1.23 x 10–3 x (1 – BF) x (Cdb – 26.7) x L/s]
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.
4720/0.120
17
69.7
69.6
15.7
67.8
67.6
17.4
65.3
65.1
19.1
62.8
62.6
21.0
60.0
59.8
22.9
57.0
56.9
24.8
19
75.8
59.1
16.1
73.1
57.9
17.8
70.0
56.7
19.5
66.7
55.4
21.3
63.2
53.7
23.2
59.4
52.1
25.0
22
82.2
44.5
17.1
79.3
43.5
18.8
76.1
42.4
20.6
72.7
41.3
22.6
68.9
40.0
24.4
—
—
—
4. Formulas:
Cldb = Cedb –
SHCkW x 1000
1.23 x L/s
Leaving wet bulb = wet bulb temperature corresponding to
enthalpy of air leaving coil (hlwb).
TCkW x 1000
hlwb = hewb –
1.20 x L/s
Where hewb is enthalpy of air entering evaporator coil (kJ/kg).
19
Performance data (cont)
COOLING CAPACITIES — SI (cont)
50TJ028 (87.9 kW) (Standard Fan)
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
3304/0.05
17
79.4
67.7
20.1
76.6
66.5
22.2
73.7
65.0
24.6
70.5
63.3
27.0
67.1
61.9
29.5
66.1
61.4
30.3
65.2
60.9
30.8
19
87.6
57.2
20.8
84.5
55.9
23.0
81.2
54.6
25.3
77.8
53.3
27.8
74.0
51.8
30.3
72.7
51.3
31.1
—
—
—
3776/0.06
22
96.5
46.5
21.6
93.1
45.0
23.8
89.4
44.0
26.1
85.4
42.6
28.6
81.2
41.0
31.1
—
—
—
—
—
—
17
81.2
72.6
20.3
78.3
71.2
22.4
75.2
69.7
24.7
71.9
68.0
27.2
68.4
66.2
29.7
67.4
65.6
30.5
66.6
65.2
31.0
19
89.6
60.7
21.0
86.4
59.4
23.2
83.0
58.1
25.5
79.2
56.5
28.0
75.3
55.0
30.5
73.9
54.5
31.2
—
—
—
Evaporator Air Quantity — L/s / BF
4248/0.07
4720/0.08
Evaporator Air — Ewb (C)
22
17
19
22
17
19
22
98.6
82.7
91.0
100.3
83.9
91.9
101.6
48.4
77.5
64.4
51.2
81.7
68.7
53.3
21.8
20.4
21.2
22.0
20.6
21.3
22.2
95.0
79.8
88.0
96.6
81.0
89.1
98.1
47.4
75.6
62.9
49.4
79.7
66.4
51.6
24.0
22.6
23.4
24.2
22.8
23.5
24.4
91.1
76.7
84.2
92.7
78.1
85.5
94.0
46.0
74.1
61.8
48.1
77.7
64.8
50.1
26.3
24.9
25.7
26.5
25.1
25.8
26.7
87.2
73.5
80.4
88.6
75.0
81.4
89.6
44.7
72.0
60.1
46.6
75.0
63.3
48.8
28.8
27.4
28.1
29.0
27.6
28.3
29.2
82.5
70.0
76.4
83.6
71.9
77.3
—
43.1
69.8
58.4
44.9
71.8
61.7
—
31.3
30.0
30.7
31.5
30.2
30.8
—
—
68.9
74.8
—
70.6
75.5
—
—
68.8
57.8
—
70.5
61.1
—
—
30.7
31.4
—
31.0
31.5
—
—
68.4
—
—
70.0
—
—
—
68.4
—
—
70.0
—
—
—
31.3
—
—
31.5
—
—
5310/0.09
17
85.7
85.6
20.8
83.1
83.0
23.0
80.3
80.2
25.4
77.2
77.1
27.9
73.8
73.8
30.5
72.4
72.4
31.2
—
—
—
19
93.4
72.6
21.5
90.4
70.5
23.7
86.6
68.9
26.0
82.5
67.2
28.4
78.2
65.4
31.0
—
—
—
—
—
—
22
102.6
56.9
22.3
99.1
54.5
24.5
95.2
53.0
26.9
90.4
51.6
29.3
—
—
—
—
—
—
—
—
—
50TJ028 (87.9 kW) (Optional High-Static Fan)
Temp (C)
Air Entering
Condenser
(Edb)
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
24
29
35
41
46
52
BF
Edb
Ewb
kW
SHC
TC
—
—
—
—
—
—
3304/0.05
17
82.3
69.1
18.2
79.7
68.0
20.3
76.8
66.5
22.6
73.8
65.1
24.9
70.3
63.5
27.3
67.0
61.8
29.9
19
90.8
58.8
18.8
87.9
57.4
20.8
85.3
56.2
23.1
81.7
54.7
25.5
77.9
53.3
27.9
73.8
51.9
30.4
3776/0.06
22
100.5
47.8
19.4
97.3
46.6
21.5
93.8
45.6
23.7
90.0
44.2
26.1
85.6
42.7
28.5
81.5
41.2
31.1
17
84.4
74.1
18.4
81.7
73.0
20.4
78.5
71.5
22.6
75.6
69.6
25.0
72.1
68.0
27.5
68.6
66.1
30.0
19
93.2
62.6
19.0
90.5
61.1
21.0
87.0
59.7
23.3
83.5
58.5
25.7
79.7
57.0
28.1
75.6
55.4
30.6
Evaporator Air Quantity — L/s / BF
4248/0.07
4720/0.08
Evaporator Air — Ewb (C)
22
17
19
22
17
19
22
102.8
85.6
94.6
104.0
87.3
95.8
105.8
50.3
79.7
66.9
54.3
83.2
70.2
56.6
19.6
18.5
19.1
19.7
18.6
19.2
19.9
99.6
83.2
92.0
101.7
84.7
93.2
102.8
49.1
77.6
65.0
51.4
81.7
68.0
53.7
21.7
20.6
21.2
21.8
20.8
21.4
22.0
95.8
80.3
88.5
97.6
81.7
90.0
99.0
47.8
75.6
63.1
49.9
79.4
66.6
52.0
23.9
22.8
23.4
24.1
23.0
23.6
24.2
91.7
77.1
85.0
93.5
78.5
86.1
94.6
46.4
74.1
61.6
48.4
77.4
65.0
50.5
26.3
25.2
25.8
26.5
25.3
25.9
26.5
87.6
73.8
80.9
88.8
75.6
81.7
90.2
44.8
71.8
60.4
47.0
75.0
63.5
49.5
28.7
27.7
28.3
28.9
27.8
28.3
28.9
82.9
70.3
76.5
84.1
71.8
77.4
85.3
43.2
69.1
58.5
45.3
71.8
61.6
47.1
31.2
30.2
30.7
31.3
30.4
30.7
31.5
LEGEND
Bypass Factor
Entering Dry Bulb Temperature (C)
Entering Wet Bulb Temperature (C)
Compressor Input (kW)
Sensible Heat Capacity (kW)
Total Capacity (kW)
NOTES:
1. Ratings are gross, and do not account for the effects of the
evaporator-fan 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 + [1.23 x 10–3 x (1 – BF) x (Cdb – 26.7) x L/s]
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.
20
5310/0.09
17
89.1
87.9
18.8
86.7
85.8
20.9
83.5
82.9
23.1
80.9
80.6
25.5
77.6
77.4
28.0
73.8
73.8
30.6
19
97.3
75.3
19.4
94.3
73.2
21.4
91.1
70.6
23.6
87.0
69.4
26.0
82.9
67.8
28.5
77.9
65.6
30.9
22
107.2
59.9
20.0
104.0
57.3
22.1
100.5
54.8
24.4
95.8
53.2
26.7
91.1
51.5
29.1
86.4
49.7
31.6
4. Formulas:
Cldb = Cedb –
SHCkW x 1000
1.23 x L/s
Leaving wet bulb = wet bulb temperature corresponding to
enthalpy of air leaving coil (hlwb).
TCkW x 1000
hlwb = hewb –
1.20 x L/s
Where hewb is enthalpy of air entering evaporator coil (kJ/kg).
COOLING CAPACITIES — ENGLISH
50TJ016 (15 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
75
85
95
105
115
120
125
4500/0.12
62
167
142
11.3
162
139
12.7
157
137
14.1
148
130
15.7
139
125
17.4
133
121
18.4
127
117
19.3
67
182
121
11.7
177
118
13.0
171
115
14.5
162
111
16.2
152
106
17.9
145
102
18.9
138
99
19.7
5250/0.14
72
200
98
13.3
193
96
14.7
188
94
16.3
177
89
18.1
166
85
18.4
159
82
19.4
151
81
20.3
62
172
154
11.5
167
150
12.8
162
147
14.3
153
140
15.9
143
135
17.6
136
131
18.5
130
126
19.4
67
188
129
11.9
182
126
13.2
176
124
14.6
166
119
16.3
155
113
18.0
148
110
19.0
141
106
19.9
Evaporator Air Quantity — Cfm / BF
6000/0.15
6750/0.17
Evaporator Air — Ewb (F)
72
62
67
72
62
67
206
177
193
209
180
195
104
162
137
109
171
147
13.4
11.6
12.0
13.5
11.7
12.0
198
171
186
204
175
189
101
159
134
107
168
141
14.9
12.9
13.3
15.0
13.0
13.4
193
165
180
197
169
182
99
157
131
103
166
139
16.5
14.4
14.7
16.6
14.5
14.9
180
156
169
184
159
172
94
150
126
99
158
133
18.3
16.0
16.4
18.4
16.1
16.5
170
146
158
173
150
161
90
144
121
94
150
127
18.6
17.7
18.1
18.7
17.9
18.3
163
140
151
165
143
154
86
139
117
91
144
124
19.6
18.7
19.1
19.8
18.8
19.2
—
134
144
—
137
146
—
134
113
—
138
119
—
19.6
20.1
—
19.7
20.1
7500/0.18
72
211
118
13.6
206
113
15.1
200
108
16.7
188
103
18.5
174
98
18.7
166
95
19.8
—
—
—
62
184
180
11.7
178
176
13.1
172
172
14.6
163
163
16.2
153
154
18.0
147
148
18.9
140
142
19.9
67
197
154
12.1
191
151
13.5
186
146
15.0
174
140
16.6
163
134
18.3
155
129
19.3
148
125
20.1
72
213
125
13.6
209
116
15.2
202
113
16.8
189
107
18.6
177
104
18.8
169
101
19.8
—
—
—
50TJ024 (20 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
75
85
95
105
115
125
BF
Edb
Ewb
kW
SHC
TC
—
—
—
—
—
—
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
6000/0.075
62
219.5
188.0
15.1
211.9
184.5
16.7
204.1
180.8
18.5
194.5
176.2
20.3
185.1
171.5
22.1
174.9
166.2
24.0
67
242.0
158.6
15.6
233.6
154.9
17.2
224.9
151.7
19.0
215.0
147.8
20.8
204.6
143.3
22.7
193.1
138.7
24.6
7000/0.085
72
262.6
125.9
16.5
253.5
122.7
18.2
244.2
119.4
20.1
233.7
115.7
22.0
222.6
111.9
23.9
—
—
—
62
224.9
203.2
15.2
217.1
199.3
16.9
208.8
194.9
18.7
199.5
190.4
20.5
189.8
185.2
22.3
179.9
178.5
24.2
67
248.0
169.6
15.8
239.6
166.7
17.4
229.9
162.7
19.2
219.8
158.7
21.0
208.9
154.7
22.8
196.7
149.5
24.7
Evaporator Air Quantity — Cfm / BF
8000/0.10
9000/0.11
Evaporator Air — Ewb (F)
72
62
67
72
62
67
72
268.8 229.2 252.8 274.0 233.3 256.1 277.5
132.7 217.0 180.7 139.3 229.5 191.1 146.1
16.7
15.4
15.9
16.9
15.5
16.0
17.0
259.8 221.4 243.8 264.6 225.2 246.8 267.9
129.6 212.9 177.0 136.1 224.0 187.2 142.3
18.5
17.0
17.6
18.6
17.2
17.7
18.7
249.8 213.0 234.0 253.9 217.6 236.8 256.9
126.3 208.3 173.2 132.7 217.2 183.0 138.7
20.3
18.8
19.3
20.4
19.0
19.4
20.5
238.9 203.8 223.0 242.7 209.6 225.6 245.5
122.5 202.5 168.7 128.8 209.3 179.6 134.9
22.2
20.6
21.1
22.3
20.8
21.2
22.4
227.3 194.8 211.8 230.6 200.4 214.0 233.2
118.5 194.3 164.9 124.5 199.9 174.3 130.7
24.1
22.5
23.0
24.2
22.7
23.1
24.3
—
185.3 199.5
—
190.6 201.4
—
—
184.9 160.3
—
190.2 169.4
—
—
24.4
24.9
—
24.6
25.0
—
LEGEND
Bypass Factor
Entering Dry Bulb Temperature (F)
Entering Wet Bulb Temperature (F)
Compressor Motor Power Input
Sensible Heat Capacity (1000 Btuh)
Total Capacity (1000 Btuh)
NOTES:
1. Ratings are gross, and do not account for the effects of the
evaporator-fan motor power and heat.
2. Direct interpolation is permissible. Do not extrapolate.
3. SHC is based on 80 F db temperature of air entering the unit. At
any other temperature, correct the SHC read from the table of
cooling capacities as follows:
Corrected SHCBtuh
= SHC + [1.10 x (1 – BF) x (Fdb – 80) x cfm]
Observe the rule of sign. Above 80 F, SHC correction will be positive; add it to SHC. Below 80 F, SHC correction will be negative;
subtract it from SHC.
10,000/0.12
62
238.0
237.6
15.7
231.3
230.7
17.4
222.9
222.4
19.1
214.3
213.8
21.0
204.6
204.2
22.9
194.7
194.0
24.8
67
258.8
201.7
16.1
249.5
197.6
17.8
239.1
193.4
19.5
227.6
189.0
21.3
215.8
183.3
23.2
202.8
177.7
25.0
72
280.5
152.0
17.1
270.6
148.5
18.8
259.7
144.8
20.6
248.0
141.0
22.6
235.2
136.6
24.4
—
—
—
4. Formulas:
Fldb = Fedb
–
SHCBtuh
1.09 x cfm
Leaving wet bulb = wet bulb temperature corresponding to
enthalpy of air leaving coil (hlwb).
TCBtuh
hlwb = hewb –
4.50 x cfm
Where hewb is enthalpy of air entering evaporator coil (Btu/lb).
21
Performance data (cont)
COOLING CAPACITIES — ENGLISH (cont)
50TJ028 (25 TONS) (Standard Fan)
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
7000/0.05
62
270.9
231.2
20.1
261.5
226.8
22.2
251.5
221.8
24.6
240.6
215.9
27.0
229.0
211.2
29.5
225.6
209.6
30.3
222.6
208.0
30.8
67
298.9
195.1
20.8
288.5
190.8
23.0
277.2
186.4
25.3
265.7
181.8
27.8
252.4
176.8
30.3
248.0
175.1
31.1
—
—
—
8000/0.06
72
329.5
158.8
21.6
317.7
153.6
23.8
305.1
150.1
26.1
291.4
145.2
28.6
277.3
140.0
31.1
—
—
—
—
—
—
62
277.1
247.7
20.3
267.1
243.1
22.4
256.6
237.9
24.7
245.5
231.9
27.2
233.5
225.9
29.7
230.0
223.9
30.5
227.4
222.5
31.0
67
305.7
207.1
21.0
295.0
202.9
23.2
283.3
198.3
25.5
270.5
192.9
28.0
256.9
187.6
30.5
252.3
186.0
31.2
—
—
—
Evaporator Air Quantity — Cfm/BF
9000/0.07
10,000/0.08
Evaporator Air — Ewb (F)
72
62
67
72
62
67
72
336.5 282.2 310.5 342.2 286.2 313.6 346.8
165.1 264.4 219.8 174.6 278.8 234.5 181.9
21.8
20.4
21.2
22.0
20.6
21.3
22.2
324.2 272.5 300.2 329.8 276.5 304.2 334.8
161.9 257.9 214.6 168.8 272.2 226.7 176.0
24.0
22.6
23.4
24.2
22.8
23.5
24.4
311.0 261.9 287.3 316.5 266.4 291.9 320.8
157.1 252.7 211.0 164.2 265.2 221.3 171.0
26.3
24.9
25.7
26.5
25.1
25.8
26.7
297.8 250.7 274.6 302.2 256.0 277.9 305.7
152.5 245.8 205.0 159.2 255.9 216.1 166.5
28.8
27.4
28.1
29.0
27.6
28.3
29.2
281.5 239.0 260.6 285.4 245.2 263.7
—
147.1 238.3 199.4 153.4 245.0 210.6
—
31.3
30.0
30.7
31.5
30.2
30.8
—
—
235.1 255.3
—
240.9 257.5
—
—
234.7 197.4
—
240.5 208.6
—
—
30.7
31.4
—
31.0
31.5
—
—
233.6
—
—
239.0
—
—
—
233.3
—
—
239.0
—
—
—
31.3
—
—
31.5
—
—
11,250/0.09
62
292.5
292.1
20.8
283.5
283.3
23.0
274.0
273.7
25.4
263.4
263.2
27.9
252.0
251.9
30.5
247.2
247.1
31.2
—
—
—
67
318.6
247.9
21.5
308.4
240.5
23.7
295.4
235.0
26.0
281.4
229.5
28.4
267.0
223.2
31.0
—
—
—
—
—
—
72
350.0
194.1
22.3
338.2
185.9
24.5
325.0
181.0
26.9
308.6
176.0
29.3
—
—
—
—
—
—
—
—
—
50TJ028 (25 TONS) (Optional High-Static Fan)
Temp (F)
Air Entering
Condenser
(Edb)
75
85
95
105
115
125
BF
Edb
Ewb
kW
SHC
TC
—
—
—
—
—
—
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
7000/0.05
62
281
236
18.2
272
232
20.3
262
227
22.6
252
222
24.9
240
217
27.3
229
211
29.9
67
310
201
18.8
300
196
20.8
291
192
23.1
279
187
25.5
266
182
27.9
252
177
30.4
8000/0.06
72
343
163
19.4
332
159
21.5
320
156
23.7
307
151
26.1
292
146
28.5
278
141
31.1
62
288
253
18.4
279
249
20.4
268
244
22.6
258
238
25.0
246
232
27.5
234
226
30.0
67
318
214
19.0
309
209
21.0
297
204
23.3
285
200
25.7
272
194
28.1
258
189
30.6
Evaporator Air Quantity — Cfm/BF
9000/0.07
10,000/0.08
Evaporator Air — Ewb (F)
72
62
67
72
62
67
351
292
323
355
298
327
172
272
228
185
284
240
19.6
18.5
19.1
19.7
18.6
19.2
340
284
314
347
289
318
168
265
222
176
279
232
21.7
20.6
21.2
21.8
20.8
21.4
327
274
302
333
279
307
163
258
216
170
271
227
23.9
22.8
23.4
24.1
23.0
23.6
313
263
290
319
268
294
158
253
210
165
264
222
26.3
25.2
25.8
26.5
25.3
25.9
299
252
276
303
258
279
153
245
206
160
256
217
28.7
27.7
28.3
28.9
27.8
28.3
283
240
261
287
245
264
148
236
200
155
245
210
31.2
30.2
30.7
31.3
30.4
30.7
LEGEND
Bypass Factor
Entering Dry Bulb Temperature (F)
Entering Wet Bulb Temperature (F)
Compressor Motor Power Input
Sensible Heat Capacity (1000 Btuh)
Total Capacity (1000 Btuh)
NOTES:
1. Ratings are gross, and do not account for the effects of the
evaporator-fan motor power and heat.
2. Direct interpolation is permissible. Do not extrapolate.
3. SHC is based on 80 F db temperature of air entering the unit. At
any other temperature, correct the SHC read from the table of
cooling capacities as follows:
Corrected SHCBtuh
= SHC + [1.10 x (1 – BF) x (Fdb – 80) x cfm]
Observe the rule of sign. Above 80 F, SHC correction will be positive; add it to SHC. Below 80 F, SHC correction will be negative;
subtract it from SHC.
22
11,250/0.09
72
361
193
19.9
351
183
22.0
338
178
24.2
323
172
26.5
308
169
28.9
291
161
31.5
62
304
300
18.8
296
293
20.9
285
283
23.1
276
275
25.5
265
264
28.0
252
252
30.6
67
332
257
19.4
322
250
21.4
311
241
23.6
297
237
26.0
283
231
28.5
266
224
30.9
72
366
204
20.0
355
196
22.1
343
187
24.4
327
182
26.7
311
176
29.1
295
170
31.6
4. Formulas:
Fldb = Fedb
–
SHCBtuh
1.09 x cfm
Leaving wet bulb = wet bulb temperature corresponding to
enthalpy of air leaving coil (hlwb).
TCBtuh
hlwb = hewb –
4.50 x cfm
Where hewb is enthalpy of air entering evaporator coil (Btu/lb).
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
50
Gpm
33
27
21
29
23
17
27
20
14
Cap
293
237
181
257
201
146
233
177
123
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
453
48
102
425
48
99
200
371
39
93
342
39
90
55
180
290
31
85
260
30
82
160
400
42
111
372
42
108
200
317
34
103
287
33
100
70
180
237
25
94
208
24
91
160
364
39
118
337
38
115
200
281
30
109
254
29
106
80
180
201
21
101
173
20
78
160
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
∆ P*
1.2
0.9
0.6
Gpm
31
25
19
LEGEND
Btuh x 1000
Entering Dry Bulb Temperature (F)
Entering Water Temperature (F)
Gallons Per Minute
Leaving Dry-Bulb Temperature (F)
∆ P*
1.5
1.1
0.7
Gpm
35
27
20
8,000
∆ P*
1.8
1.3
0.8
Gpm
41
32
24
10,000
∆ P*
2.4
1.6
1.0
Gpm
47
36
27
∆ P*
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 ∆ = 20 F.
*∆ P is the fluid pressure in ft of head.
23
Performance data (cont)
FAN PERFORMANCE — 50TJ016-028 — SI
50TJ016 (52.8 kW)*
Airlfow
(L/s)
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
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
—
—
—
—
—
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 (Pa)
149
199
r/s
BkW
kW
r/s
BkW
kW
14.8
1.26
1.47
16.3
1.42
1.65
15.2
1.41
1.64
16.6
1.57
1.83
15.6
1.57
1.83
17.0
1.73
2.02
16.0
1.74
2.03
17.3
1.91
2.23
16.4
1.93
2.25
17.7
2.10
2.45
16.9
2.13
2.48
18.1
2.30
2.69
17.3
2.34
2.73
18.5
2.52
2.94
17.8
2.57
2.99
19.0
2.75
3.21
18.3
2.81
3.28
19.4
3.00
3.50
18.8
3.07
3.58
—
—
—
—
—
—
—
—
—
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
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
—
—
—
—
—
—
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 (52.8 kW)* (cont)
Airflow
(L/s)
2124
2266
2408
2549
2691
2833
2974
3116
3257
3399
3541
BkW
FIOP
kW
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
—
—
—
—
Available External Static Pressure (Pa)
448
kW
r/s
BkW
kW
r/s
2.43
22.6
2.26
2.63
23.1
2.62
22.7
2.42
2.82
23.3
2.82
22.9
2.60
3.03
23.5
3.04
23.2
2.79
3.25
23.7
3.28
23.4
3.00
3.49
23.9
3.53
23.7
3.21
3.75
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND
— Brake Kilowatts
— Factory-Installed Option
— Input Kilowatts to Motor
*Standard drive range for the standard Low-Medium static drive on 50TJ016 is
12.38 to 16.38 r/s and 17.05 to 21.67 r/s for the optional High static drive. Other
r/s require a field-supplied drive.
NOTES:
1. Maximum continuous bkW is 3.17. Do not adjust motor rpm such that motor
maximum bkW and/or watts is exceeded at the maximum operating L/s.
24
473
BkW
2.35
2.51
2.69
2.88
3.09
—
—
—
—
—
—
kW
2.74
2.93
3.14
3.36
3.60
—
—
—
—
—
—
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 loses. See
page 31 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 32.
FAN PERFORMANCE — 50TJ016-028 — SI (cont)
50TJ024 (70.3 kW)*
Airflow
(L/s)
2595
2833
3069
3305
3541
3777
4013
4249
4485
4721
r/s
11.4
12.2
13.0
13.8
14.6
15.5
16.3
17.2
18.0
18.9
50
BkW
1.49
1.76
2.09
2.45
2.84
3.27
3.74
4.24
4.78
5.36
kW
1.68
2.01
2.37
2.78
3.23
3.72
4.24
4.82
5.43
6.09
r/s
12.7
13.4
14.1
14.9
15.6
16.4
17.2
18.0
18.8
19.7
100
BkW
1.71
1.99
2.31
2.68
3.07
3.51
3.98
4.49
5.03
5.62
kW
1.92
2.26
2.63
3.04
3.49
3.99
4.52
5.10
5.72
6.38
r/s
13.9
14.5
15.2
15.9
16.6
17.3
18.1
18.9
19.6
20.4
149
BkW
1.94
2.21
2.55
2.91
3.31
3.75
4.22
4.74
5.29
5.87
50TJ024 (70.3 kW)* (cont)
Available External Static Pressure (Pa)
Airflow
448
473
498
(L/s)
r/s BkW kW r/s BkW kW r/s BkW
20.0 3.43 3.86 20.4 3.57 4.02 20.8 3.71
2595
20.3 3.71 4.21 20.8 3.84 4.36 21.2 3.97
2833
20.7 4.05 4.60 21.2 4.18 4.75 21.6 4.32
3069
21.2 4.43 5.03 21.6 4.56 5.18 22.0 4.70
3305
21.7 4.84 5.50 22.1 4.98 5.66 22.5 5.11
3541
22.2 5.30 6.02 22.6 5.43 6.17 23.0 5.57
3777
22.8 5.78 6.57 23.2 5.92 6.73 23.5 6.06
4013
23.4 6.31 7.17 23.7 6.45 7.33 24.1 6.59
4249
24.0 6.88 7.82 24.3 7.02 7.97 24.7 7.15
4485
24.6 7.48 8.50 —
—
—
—
—
4721
BkW
FIOP
kW
Available External Static Pressure (Pa)
199
249
kW
r/s BkW kW
r/s BkW kW
r/s
2.18 15.0 2.17 2.44 16.1 2.41 2.71 17.1
2.52 15.6 2.45 2.78 16.6 2.69 3.06 17.6
2.89 16.2 2.78 3.16 17.2 3.03 3.44 18.1
3.31 16.8 3.15 3.58 17.8 3.40 3.86 18.7
3.77 17.5 3.56 4.04 18.4 3.81 4.33 19.3
4.26 18.2 4.00 4.54 19.1 4.25 4.83 19.9
4.80 18.9 4.48 5.09 19.7 4.73 5.38 20.5
5.38 19.7 4.99 5.67 20.4 5.25 5.96 21.2
6.01 20.4 5.54 6.30 21.2 5.80 6.60 21.9
6.68 21.2 6.13 6.97 21.9 6.40 7.27 22.6
299
BkW
2.66
2.94
3.28
3.65
4.06
4.51
4.99
5.51
6.07
6.67
kW
2.99
3.34
3.72
4.15
4.61
5.12
5.67
6.26
6.90
7.57
r/s
18.1
18.5
19.0
19.6
20.1
20.7
21.3
21.9
22.6
23.3
349
BkW
2.91
3.19
3.53
3.91
4.32
4.77
5.25
5.77
6.33
6.93
kW
3.28
3.62
4.01
4.44
4.91
5.41
5.97
6.56
7.20
7.88
r/s
19.0
19.4
19.9
20.4
20.9
21.5
22.1
22.7
23.3
24.0
399
BkW
3.17
3.45
3.79
4.16
4.58
5.03
5.52
6.04
6.60
7.21
kW
3.57
3.92
4.30
4.73
5.20
5.71
6.27
6.86
7.51
8.19
kW
4.17
4.52
4.91
5.34
5.81
6.32
6.88
7.48
8.13
—
LEGEND
— Brake Kilowatts
— Factory-Installed Option
— Input Kilowatts to Motor
*Standard drive range for Low-Medium static drive on 50TJ024 is 12.8 to 15.2 r/s.
Standard drive range for High static drive on 50TJ024 is 16.6 to 20.3 r/s. Other
r/s require a field-supplied drive.
NOTES:
1. Maximum continuous bkW is 7.68. 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 loses. See
page 31 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 32.
25
Performance data (cont)
FAN PERFORMANCE — 50TJ016-028 — SI (cont)
50TJ028 (87.9 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
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
50TJ028 (87.9 kW)* (cont)
Available External
Static Pressure (Pa)
Airflow
(L/s)
399
448
r/s
BkW kW
r/s
BkW
20.7 4.34 3621 21.5 3.63
3305
21.2 4.80 4000 22.0 4.11
3541
21.8 5.30 4414 22.5 4.63
3777
22.4 5.84 4866 23.1 5.20
4013
23.0 6.42 5355 23.7 5.81
4249
23.7 7.06 5883 24.4 6.47
4485
24.4 7.74 6451 25.0 7.18
4721
25.1 8.47 7060 25.7 7.94
4957
25.8 9.25 7710
—
—
5193
—
—
—
—
—
5311
BkW
FIOP
kW
kW
2222
2574
2961
3384
3845
4345
4884
5464
6086
6413
r/s
16.2
16.9
17.7
18.4
19.2
20.0
20.8
21.7
22.5
22.9
Available External Static Pressure (Pa)
149
199
249
BkW kW
r/s
BkW kW
r/s
BkW
2.93 2441 17.1 3.20 2666 18.1 3.48
3.36 2799 17.8 3.63 3029 18.7 3.92
3.83 3191 18.5 4.11 3427 19.4 4.40
4.34 3620 19.3 4.63 3861 20.1 4.93
4.90 4087 20.0 5.20 4332 20.8 5.50
5.51 4592 20.8 5.81 4843 21.5 6.12
6.16 5137 21.6 6.47 5393 22.3 6.78
6.87 5722 22.4 7.18 5983 23.1 7.50
7.62 6349 23.2 7.94 6616 23.8 8.26
8.01 6679 23.6 8.34 6948 24.2 8.66
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
r/s
19.8
20.4
21.0
21.6
22.3
23.0
23.7
24.4
25.1
25.5
349
BkW
4.05
4.50
4.99
5.53
6.11
6.74
7.42
8.14
8.92
9.32
kW
3375
3750
4161
4608
5094
5618
6182
6786
7432
7771
kW
3873
4255
4673
5128
5621
6153
6724
7337
—
—
LEGEND
— Brake Kilowatts
— Factory-Installed Option
— Input Kilowatts to Motor
*Standard drive range for Low-Medium static drive on 50TJ028 is 14.8 to 17.8 r/s.
Standard drive range for High static drive on 50TJ028 is 18.6 to 22.4 r/s. Other
r/s require a field-supplied drive.
NOTES:
1. Maximum continuous bkW is 9.92 on 400 v units and 8.60 on 220 v units. Do
not adjust motor rpm such that motor maximum bkW and/or watts is exceeded
at the maximum operating L/s.
26
kW
2897
3264
3667
4106
4582
5097
5652
6248
6885
7219
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 loses. See
page 31 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 32.
FAN PERFORMANCE — 50TJ016-028 — 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
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
—
—
—
—
—
1.6
Bhp
2.82
3.04
3.27
3.53
3.80
4.09
—
—
—
—
—
Watts
1283
1451
1633
1831
2044
2273
2518
2780
3059
3355
3669
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
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
1418
1428
1439
1452
1466
—
—
—
—
—
—
2.0
Bhp
3.29
3.52
3.76
4.02
4.30
—
—
—
—
—
—
Watts
2839
3033
3242
3467
3708
—
—
—
—
—
—
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
—
—
—
—
Available External Static Pressure (in. wg)
1.8
Watts Rpm
Bhp Watts Rpm
2430
1353
3.05
2633
1386
2619
1364
3.27
2825
1396
2823
1376
3.51
3031
1408
3043
1390
3.77
3254
1421
3278
1405
4.05
3492
1435
3530
1421
4.34
3746
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND
Bhp
— Brake Horsepower
FIOP — Factory-Installed Option
Watts — Input Watts to Motor
*Standard drive range for the standard Low-Medium static drive on 50TJ016 is
743 to 983 rpm and 1023 to 1300 r/s for the optional High static drive. Other
rpms require a field-supplied drive.
NOTES:
1. Maximum continuous bhp is 4.25. Do not adjust motor rpm such that motor
maximum bhp and/or watts is exceeded at the maximum operating cfm.
1.9
Bhp
3.17
3.40
3.64
3.90
4.17
—
—
—
—
—
—
Watts
2736
2928
3136
3360
3600
—
—
—
—
—
—
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 loses. See
page 31 for accessory/FIOP static pressure information.
5. Extensive motor and drive testing on these units ensures that the full brake
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 32.
27
Performance data (cont)
FAN PERFORMANCE — 50TJ016-028 — ENGLISH (cont)
50TJ024 (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
Rpm
832
871
911
953
996
1040
1085
1131
1178
1226
Available External Static Pressure (in. wg)
0.6
0.8
1.0
Bhp Watts Rpm Bhp Watts Rpm Bhp
2.59 2177
901 2.90 2441
965 3.22
2.99 2516
935 3.31 2783
997 3.63
3.44 2893
972 3.76 3164 1031 4.09
3.94 3310 1011 4.26 3583 1067 4.59
4.48 3766 1051 4.81 4043 1105 5.14
5.07 4263 1093 5.40 4544 1144 5.74
5.71 4801 1136 6.05 5086 1185 6.39
6.40 5382 1180 6.74 5671 1227 7.09
7.14 6007 1225 7.49 6299 1270 7.84
7.94 6675 1270 8.29 6971 1313 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
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
50TJ024 (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
1142
1167
1194
1224
1255
1289
1324
1360
1398
1438
Available External Static Pressure (in. wg)
1.6
1.8
1.9
Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
4.24 3567 1197 4.59 3864 1223 4.77 4015
4.66 3915 1219 5.01 4213 1245 5.19 4364
5.12 4304 1245 5.47 4602 1270 5.65 4754
5.63 4733 1273 5.98 5033 1296 6.17 5184
6.19 5203 1302 6.55 5504 1326 6.73 5657
6.80 5714 1334 7.16 6018 1357 7.34 6171
7.45 6268 1368 7.82 6573 1389 8.00 6728
8.16 6865 1403 8.53 7173 1424 8.71 7328
8.93 7505 1440 9.29 7815 1460 9.48 7972
9.74 8190 1477 10.11 8503
—
—
—
Rpm
1249
1270
1294
1320
1348
1379
1411
1445
1480
—
LEGEND
Bhp
— Brake Horsepower
FIOP — Factory-Installed Option
Watts — Input Watts to Motor
*Standard drive range for Low-Medium static drive on 50TJ024 is 769 to 909 rpm.
Standard drive range for High static drive on 50TJ024 is 994 to 1216 rpm. Other
rpms require a field-supplied drive.
NOTES:
1. Maximum continuous bhp is 10.30. Do not adjust motor rpm such that motor
maximum bhp and/or watts is exceeded at the maximum operating cfm.
28
2.0
Bhp Watts
4.96 4167
5.37 4516
5.83 4906
6.35 5337
6.91 5810
7.52 6325
8.18 6883
8.90 7484
9.67 8129
—
—
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 loses. See
page 31 for accessory/FIOP static pressure information.
5. Extensive motor and drive testing on these units ensures that the full brake
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 32.
FAN PERFORMANCE — 50TJ016-028 — ENGLISH (cont)
50TJ028 (25 Tons)*
Airflow
(cfm)
0.4
Bhp
3.60
4.17
4.80
5.49
6.23
7.04
7.92
8.86
9.87
10.40
Watts
2979
3450
3969
4537
5155
5824
6547
7325
8159
8597
50TJ028 (25 Tons)* (cont)
Available External
Static Pressure (in. wg)
Airflow
(cfm)
1.6
1.8
Rpm Bhp Watts Rpm Bhp
1239 5.87 4,854 1288 4.91
7,000
1272 6.48 5,362 1320 5.56
7,500
1307 7.16 5,917 1353 6.26
8,000
1344 7.89 6,523 1388 7.02
8,500
1382 8.68 7,179 1424 7.85
9,000
1421 9.54 7,887 1462 8.74
9,500
1461 10.46 8,648 1501 9.70
10,000
1503 11.45 9,464 1541 10.73
10,500
1546 12.50 10,336 —
—
11,000
—
—
—
—
—
11,250
Watts
5191
5703
6263
6873
7534
8247
9014
9835
—
—
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
0.2
Bhp
3.26
3.82
4.43
5.11
5.85
6.65
7.52
8.45
9.45
9.97
Watts
2693
3156
3667
4226
4836
5498
6214
6984
7810
8245
Rpm
909
956
1005
1054
1104
1155
1206
1257
1309
1334
Rpm
969
1014
1060
1106
1154
1202
1251
1300
1350
1375
Available External Static Pressure (in. wg)
0.6
0.8
1.0
Bhp Watts Rpm Bhp Watts Rpm Bhp
3.96 3272 1028
4.32 3574 1083
4.70
4.54 3752 1069
4.91 4060 1123
5.29
5.17 4278 1112
5.56 4593 1163
5.94
5.87 4853 1156
6.26 5175 1205
6.66
6.63 5478 1202
7.02 5808 1248
7.43
7.44 6155 1248
7.85 6492 1293
8.26
8.33 6886 1295
8.74 7229 1338
9.16
9.28 7671 1342
9.70 8020 1384 10.13
10.29 8511 1391 10.73 8868 1431 11.16
10.83 8953 1415 11.26 9313 1454 11.70
LEGEND
Bhp
— Brake Horsepower
FIOP — Factory-Installed Option
Watts — Input Watts to Motor
*Standard drive range for Low-Medium static drive on 50TJ028 is 888 to
1069 rpm. Standard drive range for High static drive on 50TJ028 is 1114 to
1341 rpm. Other rpms require a field-supplied drive.
NOTES:
1. Maximum continuous bhp is 13.30 on 400 v units and 11.5 on 220 v units. Do
not adjust motor rpm such that motor maximum bhp and/or watts is exceeded
at the maximum operating cfm.
Watts
3883
4375
4915
5504
6142
6833
7577
8375
9229
9677
1.2
Rpm Bhp Watts
1137
5.08 4,200
1174
5.68 4,698
1213
6.34 5,243
1253
7.06 5,838
1294
7.84 6,483
1336
8.68 7,179
1380
9.59 7,929
1424 10.56 8,733
1470 11.60 9,594
1493 12.15 10,045
Rpm
1189
1224
1261
1299
1338
1379
1421
1464
1508
1530
1.4
Bhp Watts
5.47 4,524
6.08 5,026
6.75 5,577
7.47 6,177
8.26 6,828
9.11 7,530
10.02 8,286
11.00 9,096
12.05 9,963
12.60 10,417
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 loses. See
page 31 for accessory/FIOP static pressure information.
5. Extensive motor and drive testing on these units ensures that the full brake
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 32.
29
Performance data (cont)
FAN PERFORMANCE USING ACCESSORY POWER EXHAUST
HORIZONTAL SUPPLY/RETURN FAN PERFORMANCE
WITH CRRFCURB013A00 HIGH-STATIC REGAIN ADAPTER
NOTE: The CRRFCURB013A00 high-static regain
adapter accessory may be used to provide horizontal
supply/return.
30
NOTE: The CRRFCURB013A00 horizontal supply and return
adapter accessory improves 50TJ fan performance by increasing
external static pressure by amount shown above.
ACCESSORY/FIOP STATIC PRESSURE (Pa) — 50TJ016
COMPONENT
Economizer
Glycol Coil
Electric Heat (kW)
22.5
38.2
55.4
2125
10
55
2360
12
65
L/s
2831
17
87
3400
22
109
3525
25
114
15
19
25
17
22
27
22
27
35
27
35
46
30
37
48
LEGEND
FIOP — Factory-Installed Option
NOTES:
1. 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
kW.
2. Heaters are rated at 400 v.
ACCESSORY/FIOP STATIC PRESSURE (in. wg) — 50TJ016
COMPONENT
Economizer
Glycol Coil
Electric Heat (kW)
22.5
38.2
55.4
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
0.08
0.10
0.07
0.09
0.11
0.09
0.11
0.14
0.11
0.14
0.18
0.12
0.15
0.19
LEGEND
FIOP — Factory-Installed Option
NOTES:
1. 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.
2. Heaters are rated at 400 v.
ACCESSORY/FIOP STATIC PRESSURE (Pa) — 50TJ024,028
COMPONENT
Economizer
Glycol Coil
Electric Heat (kW)
22.5
38.2
55.4
2800
17
86
3400
22
109
L/s
4247
27
144
4719
30
164
5300
35
191
22
28
36
27
35
46
37
45
57
43
53
65
50
61
75
LEGEND
FIOP — Factory-Installed Option
NOTES:
1. 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
kW.
2. Heaters are rated at 400 v.
ACCESSORY/FIOP STATIC PRESSURE (in. wg) — 50TJ024,028
COMPONENT
Economizer
Glycol Coil
Electric Heat (kW)
22.5
38.2
55.4
LEGEND
FIOP — Factory-Installed Option
6000
0.07
0.35
7200
0.09
0.44
CFM
9000
0.11
0.58
10,000
0.12
0.66
11,250
0.14
0.77
0.09
0.11
0.14
0.11
0.14
0.18
0.15
0.18
0.23
0.17
0.21
0.26
0.20
0.25
0.30
NOTES:
1. 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.
2. Heaters are rated at 400 v.
31
Performance data (cont)
FAN R/s AT MOTOR PULLEY SETTINGS* (FACTORY-SUPPLIED DRIVES) — SI
UNIT
50TJ
016**
016††
024**
024††
028**
028††
0
16.38
21.67
15.15
20.27
17.82
22.35
1/ 2
15.99
21.20
14.92
19.97
17.52
21.97
1
15.58
20.75
14.68
19.66
17.21
21.59
11 / 2
15.19
20.28
14.45
19.35
16.91
21.22
2
14.78
19.82
14.22
19.03
16.61
20.84
MOTOR PULLEY TURNS OPEN
21/2
3
31/2
14.38
13.98
13.58
19.37
18.90
18.43
13.98
13.75
13.52
18.73
18.42
18.12
16.31
16.01
15.71
20.46
20.08
19.70
4
13.18
17.97
13.28
17.80
15.40
19.32
41 / 2
12.78
17.52
13.05
17.50
15.10
18.95
5
12.38
17.05
12.82
17.19
14.80
18.57
51/2
†
†
†
16.88
†
†
6
†
†
†
16.57
†
†
*Approximate fan r/s shown.
†Due to belt and pulley size, pulley cannot be set to this many turns open.
**Low-medium static drive.
††High static drive.
FAN RPM AT MOTOR PULLEY SETTINGS* (FACTORY-SUPPLIED DRIVES) — ENGLISH
UNIT
50TJ
016**
016††
024**
024††
028**
028††
1/
0
983
1300
909
1216
1069
1341
2
959
1272
895
1198
1051
1318
1
935
1245
881
1179
1033
1296
11/2
911
1217
867
1161
1015
1273
2
887
1189
853
1142
997
1250
MOTOR PULLEY TURNS OPEN
21/2
3
31 / 2
863
839
815
1162
1134
1106
839
825
811
1124
1105
1087
979
960
942
1228
1205
1182
4
791
1078
797
1068
924
1159
41 / 2
767
1051
783
1050
906
1137
5
743
1023
769
1031
888
1114
51/2
†
†
†
1013
†
†
6
†
†
†
994
†
†
*Approximate fan rpm shown.
†Due to belt and pulley size, pulley cannot be set to this many turns open.
**Low-medium static drive.
††High static drive.
EVAPORATOR-FAN MOTOR PERFORMANCE
UNIT
50TJ
016
024
028
UNIT RATED
VOLTAGE
220
400
220
400
220
400
MAXIMUM
ACCEPTABLE
CONTINUOUS
BHP*
3.45
4.25
10.30
10.30
11.50
13.30
LEGEND
Bhp — Brake Horsepower
BkW — Fan Input Watts x Motor Efficiency
*Extensive motor and electrical testing on these units ensures that the
full horsepower and kilowatt ranges of the motors can be utilized with
confidence. Using your fan motors up to the horsepower or kilowatt ratings shown in this table will not result in nuisance tripping or premature
motor failure. Unit warranty will not be affected.
32
MAXIMUM
ACCEPTABLE
CONTINUOUS
BkW*
3.17
3.17
7.68
7.68
8.60
9.92
MAXIMUM
ACCEPTABLE
OPERATING
WATTS
3,065
3,775
8,640
8,640
9,600
11,000
MAXIMUM
AMP DRAW
9.4
4.8
26.0
13.0
36.0
14.6
Electrical data
50TJ016-028
UNIT
50TJ
NOMINAL
VOLTAGE
VOLTAGE
RANGE
Min
220
198
Max
242
COMPRESSOR
No. 1
No. 2
RLA LRA RLA LRA
30.1
196
30.1
196
OFM
Qty
2
Hp
1.0
POWER
EXHAUST
IFM
FLA (ea)
6.3
Hp
3.0
FLA
LRA
kW
FLA
MCA
MOCP†
9.8
—
4.7
—
10.5
—
—
90
95
110
110
—
4.7
—
10.5
—
—
—
—
—
—
47
51
60
60
4.7
—
4.7
—
4.7
10.5
—
10.5
—
10.5
22.5
22.5
38.2
38.2
55.4**
55.4**
—
4.7
—
10.5
32.5
32.5
55.1
55.1
80.0
80.0
—
—
47
53
75
81
86
92
121
126
60
60
80
90
100
100
150
150
—
4.7
—
10.5
—
—
63
68
80
80
—
4.7
—
10.5
4.7
—
4.7
—
4.7
10.5
—
10.5
—
10.5
63
68
84
90
95
101
139
144
80
80
90
90
100
110
175
175
—
4.7
—
10.5
—
—
—
—
32.5
32.5
55.1
55.1
80.0
80.0
—
—
—
—
72
77
90
100
—
4.7
—
4.7
—
4.7
—
10.5
—
10.5
—
10.5
22.5
22.5
38.2
38.2
55.4**
55.4**
32.5
32.5
55.1
55.1
80.0
80.0
72
77
86
92
98
103
90
100
90
100
110
110
—
4.7
—
10.5
—
—
—
—
80
85
100
100
—
4.7
—
4.7
—
4.7
—
10.5
—
10.5
—
10.5
22.5
22.5
38.2
38.2
55.4**
55.4**
32.5
32.5
55.1
55.1
80.0
80.0
80
85
86
92
98
103
100
100
100
100
110
110
400
360
440
15.5
111
15.5
111
2
1.0
3.4
3.0
4.8
220
198
242
38.5
293
37.7
220
2
1.0
6.3
7.5
23.5
024
220
028
(Standard
Fan)
400
028
(High
Static
Fan)
FLA
HACR
IFM
LRA
MCA
MOCP
NEC
OFM
RLA
—
—
—
—
—
—
—
—
—
400
360
198
360
360
440
242
440
440
21.8
45.4
23.7
23.7
167
345
198
198
17.2
38.5
21.8
21.8
118
293
167
167
2
2
2
2
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, U.S.A.
Outdoor (Condenser) Fan Motor
Rated Load Amps
*Heater capacity (kW) is based on heater voltage of 400 v. If power distribution voltage to unit varies from rated heater voltage, heater kW
will vary accordingly.
†Fuse or HACR circuit breaker.
**Heaters are field installed only.
NOTES:
1. In compliance with NEC requirements (U.S.A. Standard) 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.
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
1.0
1.0
1.0
5.0
3.4
6.3
3.4
7.3
7.5
10.0
10.0
10.0
POWER
SUPPLY
FLA
016
400
ELECTRIC
HEAT*
12.1
32.0
14.0
14.0
—
—
—
—
22.5
22.5
38.2
38.2
55.4**
55.4**
EXAMPLE: Supply voltage is 400-3-50.
AB = 393 v
BC = 403 v
AC = 396 v
393 + 403 + 396
3
1192
=
3
= 397
Average Voltage =
Determine maximum deviation from average voltage:
(AB) 397 – 393 = 4 v
(BC) 403 – 397 = 6 v
(AC) 397 – 396 = 1 v
Maximum deviation is 6 v.
Determine percent voltage imbalance:
6
% Voltage Imbalance = 100 x
397
= 1.5%
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 units with electric heaters over 50 kW =
(1.25 x IFM amps) + (1.00 x heater FLA).
33
Typical piping and wiring — 50TJ016-028
(50TJ016 shown)
LEGEND
NEC — National Electrical Code (U.S.A.)
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.
34
Typical wiring schematic — 50TJ016-028
(size 024 shown)
ELECTRIC HEAT
400 V
400 V
Amps
kW
34
23.3
A
57
39.6
B
83
57.4
C
35
Typical wiring schematic — 50TJ016-028
(size 024 shown) (cont)
LEGEND
AHA
BRK W/AT
C
CB
CC
CH
CLO
CLS
COMP
CT
DM
EAS
—
—
—
—
—
—
—
—
—
—
—
—
EQUIP
FL
FLA
FPT
FU
GND
HC
HPS
HTR
IFC
IFCB
IFM
IFR
L
LLS
LOR
LPS
LS
MAT
NEUT
OAT
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
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 wire or its equivalent.
3. Jumpers are omitted when unit is equipped with economizer.
4. IFCB Must Trip Amps are equal to or less than 140% FLA.
36
Adjustable Heat Anticipator
Breaks with Amp Turns
Contactor, Compressor
Circuit Breaker
Cooling Compensator
Crankcase Heater
Compressor Lockout
Cooling Lockout Switch
Compressor Motor
Current Transformer
Damper Motor
Economizer Actuator Auxiliary
Switch
Equipment
Fuse Link
Full Load Amps
Freeze Protection Thermostat
Fuse
Ground
Heater Contactor
High-Pressure Switch
Heater
Indoor-Fan Contactor
Indoor-Fan Circuit Breaker
Indoor-Fan Motor
Indoor-Fan Relay
Light
Liquid Line Solenoid
Lockout Relay
Low-Pressure Switch
Limit Switch
Mixed-Air Thermostat
Neutral
Outdoor-Air Thermostat
OFC
OFM
OP
PL
PRI
SR
SW
TB
TC
TDR
TH
TRAN
U
UR
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Outdoor-Fan Contactor
Outdoor-Fan Motor
Overcurrent Protector
Plug Assembly
Primary
Solenoid Relay
Switch
Terminal Block
Thermostat Cooling
Time-Delay Relay
Thermostat Heating
Transformer
Unloader
Unloader Relay
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Factory Wiring
Field Wiring
To indicate common
potential only, not to
represent wiring
Option/Accessory Wiring
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) indicates 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.
37
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.
38
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 fans start.
The condenser-fan motors run 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 (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 11.7 C (53 F)
leaving-air 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 10 C (50 F), a cooling lockout switch prevents the
compressors from running.
NOTE: In the economizer mode only compressor no. 1 is
energized. Compressor no. 2 is not capable of operating.
When supply-air temperature drops below a fixed set
point 11.7 C (53 F), 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 (If Accessory or Optional Heater is Installed) section on this page
for remainder of operating sequence.
39
Controls (cont)
TYPICAL SMOKE CONTROL/FIRE SHUTDOWN WIRING
LEGEND
Field Wiring
Field-Supplied Switch
See Legend on page 36.
*Included in power exhaust accessory.
OPERATING MODES
BP — Building Pressurization:
Evaporator fan on, economizer energized to fully open position, power
exhaust disabled.
Evaporator fan off, economizer deenergized to fully closed position, power
E — Evacuation:
exhaust on (open).
SD — Complete Unit Shutdown: Breaks 24-v power to thermostat.
Evaporator fan on, economizer energized to fully open position, power
SP — Smoke Purge:
exhaust on.
40
41
*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
VVT®
INDOOR-AIR QUALITY AND APOLLO CONTROLS WIRING
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
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
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
TEMP SYSTEM THERMOSTAT (WITH TIMECLOCK)
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 costeffective way to maintain comfortable building
environments.
NOTE: Unit temperature rise must not be exceeded for
proper unit operation.
TEMP SYSTEM THERMOSTAT (WITHOUT TIMECLOCK)
STANDARD UNIT TYPICAL FIELD THERMOSTAT WIRING
LEGEND
TB — Terminal Block
42
Variable Volume/Variable Temperature VVT®
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.
43
Controls (cont)
VVT® application guidelines
ratings on page 4 for minimum heating cfm required for
proper operation of the rooftop heating system. These
minimum heating airflow levels must be maintained during
all phases of heating operation. The heating airflow values
take precedence over listed minimum cooling airflow 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 40 L/s per kW
(300 cfm/ton). 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
General — The VVT system is a zoning system that
allows a single-zone heating/cooling system to operate as
a multiple-zone 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 50TJ rooftop units. This
information is intended as a supplement to the Installation
Instructions shipped with both the 33CS system controls
and the 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
BYPASS
CONTROLLER
MOUNT BYPASS CONTROLLER
ON THE WALL NEXT TO THE
MONITOR THERMOSTAT
44
AVOID RETURN GRILLES IN
CLOSE PROXIMITY TO BYPASS
DISCHARGE AIR PATH
BC
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 on page 44 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 below 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. Without 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 back draft damper needs to be installed between the
connection of the bypass duct and the closet room return
air grille.
Bypass controller considerations — Besides considering the minimum and maximum cfm’s required, as in the
system design guidelines, the following are a few system
concerns to consider when designing a bypass damper in a
VVT® system.
1. The maximum amount of air being bypassed should
match an equivalent amount of cfm of unconditioned
air based on the ability of the system to unload. For
example: If the equipment has two compressors and
one unloader, then the refrigeration portion of the
equipment is capable of unloading to about 25% of
unit capacity. Therefore the designer should make
sure the system will use 25% of the system cfm for
comfort conditioning and bypass 75% of the conditioned air before energizing the compressors. This
will ensure that the system will have enough return air
mixing with the bypassed air to keep the compressor
running. Make sure that the compressor does not
cycle too frequently based on the leaving air temperature limits since this could lessen the reliability of the
compressors. The heating equipment will only be able
to unload 50%. The system may be designed to cycle
based on the leaving air temperature limits depending
on the rise designed in the heat exchanger and the
amount of outside air being brought in. Although this
is not efficient, the equipment reliability should not be
a problem.
VVT BYPASS DESIGN
DUCTED RETURN LAYOUT FOR MANUFACTURING OFFICE
LOCATE RETURN/BYPASS JUNCTION
A MINIMUM OF 15 FT. FROM
UNIT OUTLET
ROOFTOP
UNIT
RETURN BACK DRAFT
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
45
Controls (cont)
2. Be sure to verify the pressure drop across the bypass
when in full bypass. The bypass should maintain the
system pressure without causing 100% of the air to
be bypassed. Tables are provided in the Comfort Systems Controls manual which will indicate the sound
and performance criteria of Carrier dampers. Calculate bypass of 2124 L/s (4500 cfm) on a unit with a
nominal airflow of 2832 L/s (6000 cfm) and external
static pressure of 0.125 kPa (0.50 in. wg). The
ZD-16 has two entries in the table of 1475 and 1574.
Three ZD-16 dampers in parallel could be used for
the job. The 406 mm (16-in.) damper will not operate
full open to produce these results, so it will be necessary to balance the system and set the maximum
damper position to achieve these results in the field.
3. These airflows were tested at 0.125 kPa (0.50 in. wg)
and provided NC levels of 42 and 44 respectively. A
noise criteria of around 40 would be acceptable for a
ducted bypass with internally lined duct but probably
not for externally lined ducts since the noise could be
transmitted to the return registers. Duct design is
important to consider in bypass design since
improper noise levels can require the use of other
dampers to achieve the same bypassed airflow with
reduced noise. For the example above, two 35D,
406 mm (16-in.) dampers can move the same air at a
NC level of 29.5 Radiated. These dampers can be
ordered with sound attenuators to lessen radiated
noise also. Use the damper test criteria to make the
selection.
4. If designing a system with an economizer, be sure to
include power exhaust on the equipment to prevent
conditioned air from migrating out the return registers
into the space in a over pressure condition. This condition can be identified since the doors will most likely
stand open. The same condition can occur if there is
a large exhaust system in the building for labs or
restrooms.
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.
46
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 table
provides 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.
CATEGORY 4.0 HVAC EQUIPMENT —
DEFAULT SETTINGS
SETTING
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
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
DESCRIPTION
Fan Operation
Time Guard® 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)
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
0
0
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
“line of sight” 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.
50TJ application guidelines — The 50TJ units are
constant volume units and will require the use a bypass
damper and controller. Refer to page 44 for details regarding the use and installation of the bypass damper.
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 table below for LAT set points.
CONSTANT VOLUME (CV)
ELECTRIC COOLING/HEATING
UNIT
50TJ
016
024
028
HEATER
kW
22.5
38.2
55.4
22.5
38.2
55.4
22.5
38.2
55.4
F
60
60
60
70
70
70
70
70
70
CATEGORY 4.0 HVAC SETTINGS (LAT)
4.5
4.6
4.7
4.8
C
F
C
F
C
F
C
15.6
59
15.0
93
33.9 107 41.7
15.6
59
15.0
95
35.0 126 52.2
15.6
59
15.0 114
45.6 147 63.9
21.1
60
15.6
93
33.9 107 41.7
21.1
60
15.6 103
39.4 126 52.2
21.1
60
15.6 114
45.6 147 63.9
21.1
59
15.0
90
32.2 100 37.8
21.1
59
15.0
97
36.1 115 46.1
21.1
59
15.0 108
42.2 135 57.8
LAT — Leaving Air Temperature
47
Application data
Ductwork
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 49 for information on field-installed concentric
ductwork when applicable.
Minimum ambient cooling operation
temperature
Units are designed to operate at outdoor temperatures
down to 4.4 C (40 F). To operate at lower outdoor-air temperatures, see product ordering data or contact your local
Carrier representative for appropriate accessory combinations for specific applications.
Electric heat
Maximum operating outdoor-air temperature
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.
For cooling, this temperature is 52 C (125 F) for 016 size,
52 C (125 F) for 024 size, and 48 C (118 F) for 028 size
(52 C [125 F] with high ambient unit). Refer to the Cooling Capacity tables on pages 19-22 for further details.
Thru-the-curb service connections
Roof curb connections allow field power wires and control
wires to enter through the roof curb opening.
Internal unit design
All units are automatic changeover from heating to cooling
when automatic changeover thermostat and subbase are
used.
Due to Carrier’s internal unit design (draw-thru over the
motor), air path, and specially designed motors, the full
horsepower (kilowatts) (maximum continuous bhp [maximum continuous bkW]) 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.
Airflow
Apollo direct digital communicating controls
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
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
67.1 L/s per kW (500 cfm/nominal ton) on size 016 and
024 units, and 5311 L/s (11,250 cfm) on size 028 units.
Minimum airflow
The minimum airflow for cooling is 40 L/s per kW
(300 cfm/nominal ton) on size 016 and 024 units and
38 L/s per kW (280 nominal cfm/ton) on size 028 units.
48
The Apollo direct digital controls must be used with either
a Carrier master or monitor thermostat.
The following functions (POINTS) can be read by the
accessory DataPORT™ or DataLINK™ devices. Below are
the typical points that can be accessed from a TEMP thermostat (33CSTM--01) or TEMP Monitor thermostat
(33CSTM--01). Points that have read/write capability can
be forced by the user.
POINTS DISPLAY TABLE
VARIABLE DESCRIPTION
Zone Temperature
Duct Temperature
Outside Air Temperature
Zone Demand
Demand Type
Controller Set Point
Occupied
Damper Position
System Cool Stage 1
System Cool Stage 2
System Heat Stage 1
System Heat Stage 2
System Fan
Auxiliary Relay
System Fan Status
DX Coil Temperature
Filter Status
System IAQ Status
Zone in IAQ Status
Any Zone in IAQ
Indoor Relative Humidity
Outdoor Relative Humidity
HVAC Usage Meter
Override Usage Meter
HVAC Override Usage Meter
UNIT DISPLAY
°F
°F
°F
°F
Cool/Heat
°F
Yes/No
0-15
On/Off
On/Off
On/Off
On/Off
On/Off
On/Off
On/Off
°F
Clean/Dirty
Normal/Alarm
Yes/No
Yes/No
%
%
Minutes
Minutes
Minutes
POINT NAME
ZT
DT
OAT
ZDMD
DMDTYPE
SETPOINT
OCC
DPOS
C1
C2
H1
H2
FN
AUX
SFANS
DX
FILS
IAQLOG
ZONEIAQ
ANYIAQ
RH
OARH
UMHVAC
UMUO
UMUOSM
READ/WRITE CAPABILITY
Yes
Yes
Yes
Read Only
Read Only
Read Only
Yes
Yes
Read Only
Read Only
Read Only
Read Only
Yes*
Yes†
Read Only
Yes
Yes
Yes
Read Only
Read Only
Yes
Read Only
Yes
Yes
Yes
*Forcing the system fan will cause any energized system stages to turn
off.
†If Auxiliary Relay is configured as 0 or 1, then the point can be forced
with no other effect. Other configurations will cause system stages and
fan to turn off.
CONCENTRIC DUCT AIR DISTRIBUTION
CONCENTRIC DUCT DETAILS
576
(1’-10 11/16”) MAX.
310
(1’-0 3/16”)
1757
(5’-9 3/16”) MAX.
1890
(6’-2 3/8”) MAX.
132
(5 3/16”)
1392
(4’-6 13/16”)
506
(1’-7 15/16”)
310
(1’-0 3/16”)
B
610
(24”) MIN.
B’
A
A’
BAFFLE
Shaded area indicates block-off panels.
NOTE: Do not drill in this area, damage to basepan may result in
water leak.
NOTES:
1. Dimensions A, A′ and B, B′ are obtained from field-supplied
ceiling diffuser.
2. Dimensions are in millimeters.
Concentric ducts may only be installed on units without electric
heat. Personal injury or unit damage may result.
49
Application data (cont)
Condenser coil protection (Enviro-Shield™)
Pre-coated 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. Pre-coated 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 pre-coated aluminum-fin coils.
50
E-coated aluminum-fin coils have an extremely flexible
and durable epoxy coating uniformly applied to all coil surfaces. Unlike brittle phenolic dip and bake coatings, E-coat
provides superior protection with unmatched flexibility,
edge coverage, metal adhesion, thermal performance and,
most importantly, corrosion resistance. E-coated coils provide this protection since all coil surfaces are completely
encapsulated from environmental contamination. Specify
E-coated aluminum-fin coils for industrial environments
with high levels of air pollution. This option also provides
better protection compared to standard or pre-coated
aluminum-fin coils in industrial environments.
E-coated copper-fin coils have the same flexible and durable epoxy coating as E-coated aluminum-fin coils. However, this option combines the natural salt and environmental resistance of all-copper construction with the highest
level of corrosion protection. Specify E-coated copper-fin
coils in the harshest combination of coastal and industrial
environments.
Guide specifications — 50TJ016-028
Packaged Rooftop Electric Cooling Unit with
Electric or Glycol Heat — Constant Volume
Application
HVAC Guide Specifications
Size Range: 52.8 to 87.9 kW (15 to 25 Tons),
Nominal (Cooling)
20 to 60 kW (Electric Heat)
123,000 to 405,000 Btuh
(Glycol Heating)
Carrier Model Numbers: 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 optional
electric resistance heaters or glycol coil for heating
duty. Supply air shall be discharged downward or
horizontally (with horizontal supply/return roof curb
assembly), as shown on contract drawings. Standard
unit shall include a manual outdoor-air inlet.
1.02 QUALITY ASSURANCE
A. Unit (sizes 016 and 024) shall be rated in accordance with ARI Standards 270 and 360 and all units
shall be designed in accordance with UL Standard
1995 (U.S.A.).
NOTE: The 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 (U.S.A.) 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 (U.S.A.).
E. Insulation and adhesive shall meet NFPA 90A requirements (U.S.A.) for flame spread and smoke
generation.
F. Unit casing shall be capable of withstanding
500-hour salt spray exposure per ASTM B117
(scribed specimen) (U.S.A.).
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 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
coated, fiberglass insulation coated on the air
side.
3. Cabinet panels shall be easily removable for
servicing. Cabinet panels are a minimum of
20 gage. Panels shall have 1-in. thick, 1.5-lb
density insulation.
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 in accordance with ASHRAE
Standard 62 (U.S.A. Standard).
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 lowmedium static pressure fan drive. The alternate fan drive option shall have a factoryinstalled high static pressure fan drive.
Motors shall be 3-phase and open drip proof
design with class B insulation.
b. Fan wheel shall be made from steel with a
corrosion resistant finish. It shall be a
dynamically balanced, double-inlet type with
forward-curved 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. Motors shall be 3-phase
and open drip proof design with class B
insulation.
3. Optional condenser fan motors (028 size only)
shall be 3-phase and totally enclosed with class
F insulation.
D. Compressor(s):
1. Fully hermetic Copeland, 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 aluminum plate fins mechanically bonded
to seamless internally grooved copper tubes
with all joints brazed.
51
Guide specifications — 50TJ016-028 (cont)
2. All coils shall be leak tested at 1034 kPa
(150 psig) and pressure tested at 3103 kPa
(450 psig).
3. Optional pre-coated 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.
4. Optional copper-fin coils shall be constructed of
copper-fins mechanically bonded to coppertubes and copper tube sheets. Galvanized steel
tube sheets shall not be acceptable. A polymer
strip shall prevent coil assembly from contacting
sheet metal coil pan to minimize potential for
galvanic corrosion between the coil and pan. All
copper construction shall provide protection in
moderate coastal environments.
5. Optional E-coated aluminum-fin coils shall have
a flexible epoxy polymer coating uniformly
applied to all coil surface areas without material bridging between fins. Coating process shall
ensure complete coil encapsulation. Color shall
be high gloss black with gloss requirements of
60° of 65 to 90% per ASTM D523-89. Uniform dry film thickness from 0.8 to 1.2 mil on
all surface areas including fin edges. Superior
hardness characteristics of 2H per ASTM
D3363-92A and cross hatch adhesion of 4B5B per ASTM D3359-93. Impact resistance
shall be up to 160 in./lb (ASTM D2794-93).
Humidity and water immersion resistance shall
be up to a minimum of 1000 and 250 hours
respectively (ASTM D2247-92 and ASTM
D870-92). Corrosion durability shall be confirmed through testing to no less than 1000
hours salt spray per ASTM B117-90. Coil construction shall be aluminum fins mechanically
bonded to copper tubes.
6. Optional E-coated copper-fin coils shall have a
flexible epoxy polymer coating uniformly
applied to all coil surface areas without material
bridging between fins. Coating process shall
ensure complete coil encapsulation. Color shall
be high gloss black with gloss requirements of
60° of 65 to 90% per ASTM D523-89.
Uniform dry film thickness from 0.8 to 1.2 mil
on all surface areas including fin edges.
Superior hardness characteristics of 2H per
ASTM D3363-92A and cross hatch adhesion
of 4B-5B per ASTM D3359-93. Impact resistance shall be up to 160 in./lb (ASTM D279493). Humidity and water immersion resistance
shall be up to a minimum of 1000 and
250 hours respectively (ASTM D2247-92 and
ASTM D870-92). Corrosion durability shall
be confirmed through testing to no less than
1000 hours salt spray per ASTM B117-90.
52
F.
G.
H.
I.
J.
Coil construction shall be copper fins mechanically bonded to copper tubes.
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
factory-installed 51 mm (2-in.) thick throwaway
fiberglass filters (8 to 10% efficiency, when clean) 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
low-voltage 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, cutout at 186 kPa
(27 psig).
3) Freezestats (evaporator coil), dual.
4) High-pressure switch, cutout at 2951 kPa
(426 psig).
b. Supply-air thermostat shall be located in the
unit.
c. Heating section shall be provided with the
following minimum protections:
1) High-temperature limit switch.
2) Overcurrent protection.
Operating Characteristics:
1. Unit shall be capable of starting and running at
52 C (125 F) for 016 size, 52 C (125 F) for
024 size, and 48 C (118 F) for 028 size, 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
4.4 C (40 F).
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.
K. 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 automaticreset 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) (U.S.A.) effective October 24, 1997.
L. 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 VVT®
(variable volume and temperature) 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 249 Pa (1.0 in. wg)
pressure differential.
c. Capable of introducing up to 100% outdoor
air.
d. Equipped with dry-bulb temperature control
to govern economizer changeover.
5.
6.
* 7.
* 8.
* 9.
*10.
11.
*12.
*13.
e. Equipped with a mixed-air sensor that controls the economizer to a 30.5 C (55 F) control point.
f. Outdoor air opening is 450.85 mm x
1813.05 mm (17.75-in. x 71.38-in.), and
0.82 m2 (8.8 ft2).
g. Damper motor is 24-v, spring-return type
design (close on loss of power).
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.
Outdoor air opening is 96.52 mm x 965.20
mm (3.80-in. x 31.00-in.), and 7599.98 mm2
(117.8 in.2).
Accessory Compressor Cycle Delay:
Compressor shall be prevented from restarting
for a minimum of 5 minutes after shutdown.
Thermostats and Subbases:
To provide staged heating and cooling in addition to automatic (or manual) changeover and
fan control.
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.
Power Exhaust:
Package shall include an exhaust (propeller
style) fan, 0.37 kW (1/2 Hp) motor, and damper
for vertical flow units with economizer to control overpressurization of building.
Head Pressure Control Package:
Consists of an accessory outdoor-air package
and a solid-state control with condenser coil
temperature sensor for controlling condenserfan motor speed to maintain condensing temperature between 32.2 C (90 F) and 43.3 C
(100 F) at outdoor ambient temperature down
to –28.9 C (–20 F).
Low-Ambient Kits:
When used, allows units to operate at lower
outdoor ambient temperatures.
Enthalpy Sensor:
a. For use with economizer only.
b. Capable of comparing heat content (temperature and humidity) of outdoor air and
indoor air and controlling economizer cut-in
point at the most economical level.
NOTE: Two accessory enthalpy sensors are
required for differential enthalpy control.
Electronic Programmable Thermostat:
Capable of using deluxe full-featured electronic
thermostat.
53
Guide specifications — 50TJ016-028 (cont)
14. 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 product ordering
data for more information.
15. Service Option Package:
NOTE: These items can be ordered as one
package or separately.
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-convertible
to a tool-less entry by removing and discarding screws. Each external hinged access
panel shall be permanently attached to the
rooftop unit.
b. Non-fused disconnect switch: Shall be factory-installed, 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
54
16.
17.
18.
19.
access door. Shall be accessible from outside
the unit and shall provide power off lockout
capability.
Electric Heater Package:
Fully assembled for installation. The packages
are designed in accordance with UL standards
and all units feature a single point connection.
Glycol Coil:
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;
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.
Alternate Drive:
Shall provide higher static drive capability to
enhance evaporator-fan performance rpm
range.
Hail Guard, Condenser Coil Grille:
Shall protect the condenser coil from hail, flying
debris, and damage by large objects without
increasing unit clearances.
55
Carrier Corporation • Syracuse, New York 13221
12-00
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1
New Book 1
Pg 56
Catalog No. 005-001
Printed in U.S.A.
Form 50TJ-C11PD
Replaces: 50TJ-C10PD
Tab OP2b
Tab 1b
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