Package Rooftop Units – 60Hz
Quality Assurance
Certificate Reg. No:
04 100 950420
Subject to change without notice
Manufacturing point: Jeddah, Saudi Arabia
Nearest port of embarkation: Jeddah Islamic port
Product classification: Commercial
Installation, Operation and Maintenance Instructions
50TJM – 60Hz
Nominal Cooling Capacity 15 - 28 Tons
HFC R - 410A Refrigerant
Note: This manual discusses the Mechanical Installation of this unit, Start-up Procedures, Operating Sequences and
Service Instructions.
Read thoroughly the entire installation instruction manual before starting the unit installation, to get familiarized with all
steps and to identify if any additional reference materials as required.
The 50TJM units are single side discharge rooftop cooling unit utilizing electric heat as an option. Units are pre-wired,
pre-charged with R-410A refrigerant, and tested at the factory. These units can be placed on the side of a building or
can be placed on a roof without roof curbs. Each unit is designed to occupy a minimal space. Piping and drain
connections are readily accessible.
For a complete list of options and accessories, refer to the Product Data Catalog.
Contact your local Carrier representative for additional reference materials.
Page 1
Table of Contents
1.0 – SAFETY CONSIDERATIONS ....................................................................................................... 3
1.1 – General ............................................................................................................................. 3
1.2 – Installation Safety Considerations..................................................................................... 3
1.3 – Warranty............................................................................................................................ 3
Physical Data ......................................................................................................................................... 5
Unit Dimensional Drawing.............................................................................................................. 6 – 7
2.0 – INSTALLATION ............................................................................................................................. 8
2.1 – Jobsite Survey................................................................................................................... 8
2.2 – Plan for Unit Location ........................................................................................................ 8
2.3 – Rig and Place Unit ............................................................................................................ 8
2.4 – Positioning and Clearance ................................................................................................ 9
2.5 – Field Fabricate Ductwork .................................................................................................. 9
2.6 – Make Unit Duct Connections ............................................................................................ 9
2.7 – Trap Condensate Drain ................................................................................................... 10
2.8 – Outdoor Air-Vent ............................................................................................................. 10
2.9 – Make Electrical Connections ........................................................................................... 10
Electrical Data ..................................................................................................................................... 11
Electrical Resistance Heater Data ..................................................................................................... 12
Typical Wiring Schematic........................................................................................................... 13 – 18
3.0 – START–UP INSTRUCTIONS ...................................................................................................... 19
3.1 – Unit Preparation .............................................................................................................. 19
3.2 – Internal Wiring ................................................................................................................. 19
3.3 – Compressor Mounting ..................................................................................................... 19
3.4 – Refrigerant Service Ports ................................................................................................ 19
3.5 – Compressor Rotation ...................................................................................................... 19
3.6 – Evaporator Fan ............................................................................................................... 19
3.7 – Condenser Fans and Motors .......................................................................................... 20
3.8 – Return – Air Filters .......................................................................................................... 20
3.9 – Base Unit Operation ........................................................................................................ 20
4.0 – SERVICE ..................................................................................................................................... 20
4.1 – Cleaning .......................................................................................................................... 20
4.2 – Lubrication ....................................................................................................................... 20
4.3 – Evaporator Fan Performance Adjustment ...................................................................... 21
4.4 – Evaporator Fan Service and Replacement ..................................................................... 21
4.5 – Belt Tension Adjustment ................................................................................................. 21
4.6 – Condenser – Fan Adjustment ......................................................................................... 21
4.7 – Refrigerant Charge.......................................................................................................... 22
4.8 – Protective Devices .......................................................................................................... 22
4.9 – Control Circuit, 24 – V ..................................................................................................... 22
5.0 – REPLACEMENT PARTS ............................................................................................................ 22
Fan Performance Table .............................................................................................................. 23 – 26
Charging Chart ............................................................................................................................ 27 – 29
Troubleshooting .................................................................................................................................. 30
Start–up Check List ............................................................................................................................ 31
Page 2
1 – SAFETY CONSIDERATIONS
1.1 – General
Improper installation, adjustment, alteration, service, maintenance or use can cause explosion, fire,
electrical shock or other conditions which may cause personal injury or property damage. Consult a
qualified installer; service agency must use factory-authorized kits or accessories when modifying this
product. Refer to the individual instructions packaged with the kits or accessories when installing.
Follow all the safety codes. Wear safety glasses and work gloves. Use quenching cloths for brazing
operations and have a fire extinguisher available. Read these instructions thoroughly and follow all
warnings or cautions attached to the unit. Consult local building codes for special requirements. In
absence of local codes, it is recommended that the USA standard ANSI/NFPA 70, National Electrical
Code (NEC), be followed.
It is important to recognize safety information. This is the safety-alert symbol
. When you see
this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, CAUTION, and NOTE. These words are used
with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe
personal injury of death. WARNING signifies hazards which could result in personal injury or death.
CAUTION is used to identify unsafe practices, which may result in minor personal injury or product
and property damage. NOTE is used to highlight suggestions which will result in enhanced
installation, reliability, or operation.
1.2 – Installation Safety Considerations
After the unit has been received and when it is ready to be installed or reinstalled, it must be
inspected for damage. If damage is detected upon receipt, immediately file a claim with the shipping
company or repair.
This machine must be installed in a location that is not accessible to the public and protected against
access by non-authorized people.
This machine must not be installed in an explosive atmosphere.
Do not remove the skid or the packaging until the unit is in its final position. These units can be moved
with a fork lift truck, as long as the forks are positioned in the right place and direction on the unit.
The units can also be lifted with slings, using only the designated lifting points marked on the unit
(labels on the chassis and a label with all unit handling instructions are attached to the unit). Use
slings with the correct capacity, and always follow the lifting instructions on the certified drawings
supplied for the unit.
Safety is only guaranteed, if these instructions are carefully followed. If this is not the case, there is a
risk of material deterioration and injuries to personnel. These units are not designed to be lifted from
above.
1.3 – Warranty
Warranty is based on the general terms and conditions of the manufacturer. Any modifications to the
design and/or installation made without discussion with Carrier and without advance written
agreement will result in the loss of the right to any warranty claims and any claim for injury to
personnel as a result of these modifications.
Page 3
WARNING
ELECTRIC SHOCK HAZARD
Failure to follow this warning could cause
personal injury or death.
Before performing service or maintenance
operations on unit, always turn off main
power switch to unit and install lockout
tag. Unit may have more than one power
switch.
CAUTION
CUT HAZARD
Failure to follow this warning could cause
personal injury.
Sheet metal parts may have sharp edges or
burrs. Use care and wear appropriate protective
clothing, safety glasses and gloves when
handling parts and servicing air conditioning
equipment
WARNING
WARNING
UNIT OPERATION AND SAFETY
HAZARD
Failure to follow this warning could cause
personal injury, death and /or equipment
damage.
PERSONAL SAFETY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could cause
personal injury or death damage.
Puron® (R-410A) refrigerant systems
operate at higher pressures than standard
R-22 systems. Do not use R-22 service
equipment or components on Puron®
refrigerant equipment.
Relieve pressure and recover all refrigerant
before system repair or final unit disposal.
Wear safety glasses and gloves when handling
refrigerants. Keep torches and other ignition
sources away from refrigerants and oils.
NOTE
IMPORTANT
Units have high ambient operation limits. If limits are exceeded, the unit will automatically lock the
compressor out of operation. Manual reset will be required to restart the compressor.
Page 4
Physical Data Table - 1
50TJM Unit Physical Data (60Hz) (English)
Unit 50TJM Size
Unit Dimensions
Unit Operation Weight
18
24
Page - 6 (Fig -1)
Page - 6 (Fig -1)
Refrigeration System
Compressor No. / Type
Refrigerant type
Circuts No.#
Charge per Circuit (1-Down/2-Up) -LBS
Metering Device
Filter Drier Qty/ size
High Pressure Switch (Trip/ Reset)- PSIG
Low Pressure Switch (Trip/ Reset)- PSIG
28
34
Page - 7 (Fig -2)
Page - 7 (Fig -2)
Freeze Protection Thermostat (Open / Close)±1.8 F
2 / Scroll
Puron ® R410A
2
15.65 - 18.07
19.40 - 19.84
32.63 - 30.53
28.22 - 30.10
TXV- adjustable
2 / 85
2 / 165
630 / 480
54 / 70
-18 / -14
Condenser Coil
Coil Type
Standard Coil Material (Pipes/Fins) *
Qty x Rows x FPI*
Qty x Face Area (ft2)
Coil test Pressure (PSIG)
3/8" helical grooved copper tube, 0.866" Aluminum double wavy
Cu/Al
2 x 3 x 17
1 x 3 x 16
1 x 4 x 16
1 x 26.7
2 x 28.8
450
0
Condenser Fan & Motor
Approx. Air Flow Rate (CFM)
Quantity
Diameter (in) / No. of Blades
Motor Type
Motor HP/ RPM
Evaporator Coil
Coil Type
Standard Coil Material (Pipes/Fins) *
Qty x Rows x FPI*
Qty x Face Area (ft2)
Coil test Pressure
Drain Pan connection Size (in)
Return Air Filter Qtyx Size (in)
19000
17500
20000
2
30 / 4
Induction Motor- Totally Enclosed
1 / 1140
20000
V - shaped, 3/8" helical grooved copper tube, 0.75" Aluminum LSW
Cu/Al
2 x 3 x 17
2 x 4 x 17
2 x 9.75
2 x 10.3
350
3/4
4 x 35.4 x 21.7
4 x 33.8 x 21.7
Evaporator Fan and Motor Section
1 / 15.75 x 15.75
1 / 17.7 x 17.7
Fan Quantity / Fan Size (in)
Centrifugal- Forward Blade
Fan Type
Belt
Drive Type
Induction Motor - TEFC
Motor Type
5.5
Motor BHP (230v /400v) applications
4.0
7.5
6.0
Motor BHP (460v) applications
4.8
9.0
112 / 28
Motor Frame Size/ Motor Shaft Diameter (mm)
100 / 28
132 / 38
3.1 / 4.1
Motor Pulley Pitch Diameter (Min/Max) (in)
4.3 / 5.6
Fan RPM Range(RPM)*
1020 - 725
1042 - 732
1042 - 732
1002 - 722
6.9
Fan Pulley Pitch Diameter (in)
10.4
1…BX66
Belt, Quantity..Type
1…BX74
24.4 - 27.5
Pulley Center to Center Distance(in)
6
Movable Pulley Maximum full turns from closed position
52
Aprox.Speed Change per full turn of movable pulley flange(rpm)
49
47
3.5
Factory Speed Setting
2.5
Approx. Factory Belt Standard Deflection (in) @ Force (Lb)
0.4 @ 7.09 Lb
0.4 @ 8.73 Lb
0.4 @ 8.73 Lb 0.39 @ 8.96 Lb
* Coils with Copper Fins are available in :
Evaporator Copper Coils : 16 FPI
Condenser Copper Coils : 15 FPI for 50TJM18/24 and 16FPI for 50TJM28/34
Page 5
UNIT DIMENSIONAL DRAWING: 50TJM - 18 and 50TJM - 24 (Fig - 1)
UNIT
50TJM - 18
50TJM - 24
SHIPPING DIMENSIONS (mm)
LENGTH
WIDTH
DEPTH
2440
2235
1375
A
192
197
CORNER WEIGHT (Kg)
B
C
D
TOTAL
178
236
254
860
182
241
260
880
K
1050
CENTER OF GRAVITY (mm)
L
1050
M
450
NOTES:
1. Dimensions are in millimeters.
2.
Center of Gravity.
3.
Direction of Airflow
4. Minimum clearance:
REAR: 2134mm for coil removal. This dimension can be reduced to 1219mm if conditions permit coil removal from the top.
TOP: 1829mm to assure proper condenser fan operation.
SIDE: 1219mm for Compressor, Filter and Control boxes access.
- Local codes or jurisdiction may prevail.
5. With the exception of clearance for the condenser coil and the damper / power exhaust as stated in Note no. 6, a removal fence or barricade requires no clearance.
6. Dimensions are from outside of corner post. Allow 8mm on each side for top cover drip edge.
7. Weights are Given for aluminim evaporator and condenser coil plate fins
Page 6
UNIT DIMENSIONAL DRAWING: 50TJM - 28 and 50TJM - 34 (Fig - 2)
UNIT
50TJM - 28
50TJM - 34
SHIPPING DIMENSIONS (mm)
LENGTH
WIDTH
DEPTH
3200
2485
1400
A
248
254
CORNER WEIGHT (Kg)
B
C
D
TOTAL
226
310
340
1125
231
317
348
1150
K
CENTER OF GRAVITY (mm)
L
M
1350
1160
450
NOTES:
1. Dimensions are in millimeters.
2.
Center of Gravity.
3.
Direction of Airflow
4. Minimum clearance:
REAR: 2134mm for coil removal. This dimension can be reduced to 1219mm if conditions permit coil removal from the top.
TOP: 1829mm to assure proper condenser fan operation.
SIDE: 1219mm for Compressor, Filter and Control boxes access.
- Local codes or jurisdiction may prevail.
5. With the exception of clearance for the condenser coil and the damper / power exhaust as stated in Note no. 6, a removal fence or barricade requires no clearance.
6. Dimensions are from outside of corner post. Allow 8mm on each side for top cover drip edge.
7. Weights are Given for aluminim evaporator and condenser coil plate fins
Page 7
2 – INSTALLATION
2.1 – Jobsite Survey
Complete the following checks before installation.
1. Consult local building codes or the U.S.A. National Electrical Code (Ref: ANSI/NFPA 70, [American National
Standards Institute/National Fire Protection Association], latest revision) for special installation requirements.
2. Determine unit location (from project plans) or select unit location.
3. Check for possible overhead obstructions which may interfere with unit lifting or rigging.
2.2 – Plan for Unit Location
Select a location for the unit and its support system (curb or other) that provides for the minimum clearances required
for safety. This includes the clearance to combustible surfaces, unit performance and service access below, around
and above unit as specified in Fig - 3. For the centre of gravity coordinates, the position of the unit mounting holes,
and the weight distribution points, refer to the unit dimensional drawing Fig - 1 and Fig - 2.
Fig. 3 Unit Clearance Diagram
NOTES:
1. Minimum clearance:
REAR: 2134mm for coil removal. This dimension can be reduced to 1219mm if conditions permit coil
removal from the top.
TOP: 1829mm to assure proper condenser fan operation.
SIDE: 1219mm for Compressor, Filter and Control boxes access.
- Local codes or jurisdiction may prevail.
2. With the exception of clearance for the condenser coil and the damper / power exhaust as stated in Note no. 3, a
removal fence or barricade requires no clearance.
3. Dimensions are from outside of corner post. Allow 8mm on each side for top cover drip edge.
2.3 – Rig and Place Unit
Keep unit upright and do not drop. Spreader bars are not required if top crating is left on unit.
Rollers may be used to move unit across a roof Level by using unit frame as a reference; leveling tolerance is± 1/16
in. per linear ft in any direction.
Four lifting holes are provided in ends of unit base rails as shown in Fig – 4 Refer to rigging instructions on unit.
Fig. 4 Rigging Diagram
Roof mount - Check building codes for weight distribution requirements. Unit weight and dimensions is shown in unit
dimensional drawing Fig 1 and Fig 2 on page 6 & 7 and table 2.
NOTE: Consider also the effect of adjacent units.
Page 8
UNIT
50TJM - 18
50TJM - 24
50TJM - 28
50TJM - 34
SHIPPING DIMENSIONS
(mm)
LENGTH WIDTH DEPTH
2440
2235
1375
2440
2235
1375
3200
2485
1400
3200
2485
1400
SHIPPING
WEIGHT
GROSS (Kg)
925
945
1190
1215
UNIT DIMENSIONS (mm)
LENGTH
2440
2440
3200
3200
WIDTH
2182
2182
2432
2432
DEPTH
1348
1348
1374
1374
UNIT WEIGHT
NET(Kg)
860
880
1125
1150
Table – 2 Unit Weights and Dimensions
NOTES:
1. Remove boards at ends of unit and runners prior to rigging.
2. Rig by inserting hooks into unit base rails as shown. Use bumper boards for spreader bars.
CAUTION
NOTE
IMPORTANT
All units are internally isolated against vibration.
If extra isolation required, please see “Unit
Dimensional Drawing” Fig - 1 and Fig - 2 for
corner weights.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in
equipment damage.
All panels must be in place when rigging.
2.4 – Positioning and Clearance.
Before positioning the unit, check the following:
• The permitted loading at the site is adequate or that appropriate strengthening measures have been taken.
• The unit is installed level on an even surface (maximum tolerance is 5 mm in both axes).
• Ensure access to the components (see “Unit Dimensional Drawings” Fig 1 & 2 & “Clearance Diagram” Fig 3).
• The number of support points is adequate and that they are in the right places.
• Although the unit is weatherproof guard against water from higher level runoff and overhangs.
Unit may be installed directly on wood flooring or on approved roof - covering material when roof curb is used. Do not
install unit in an indoor location. Do not locate air inlets near exhaust vents or sources of contaminated air.
2.5 – Field Fabricate Ductwork
Secure all ducts to building structure. Use flexible duct connectors between unit and ducts as required (a space for 2.5
to 3ft is required in case of repairing or replacing the blower wheel). Insulate and weatherproof all external ductwork,
joints, and roof openings with counter flashing and mastic in accordance with applicable codes. Ducts passing through
an unconditioned space must be insulated and covered with a vapor barrier.
The 50TJM units with electric heat require a 2-in.clearance for the first 24-in. of ductwork. Outlet grilles must not lie
directly below unit discharge.
NOTE
IMPORTANT
A 90-degree elbow must be provided in drain hole and must be removed in ductwork to comply with UL
(Underwriters’ Laboratories) codes for use with electric heat.
2.6 – Make Unit Duct Connections
Unit is shipped for side duct connections. Ductwork openings are shown in Fig. 1 and Fig. 2.
Page 9
2.7 – Trap Condensate Drain
See Fig. 5, Fig.1 and Fig. 2 for drain pipe location. Trap should be deep enough to offset the maximum unit static
difference. Fig. 5 shows the recommended trap sizing.
Fig. 5 Condensate Drain Details
2.8 – Outdoor Air-Vent
All units have a manual outdoor side vent to provide ventilation air. Side vents can admit up to 10% outdoor air into
indoor air section return-air compartment.
2.9 – Make Electrical Connections
FIELD POWER SUPPLY – Unit is factory wired for voltage shown on nameplate.
When installing units, provide disconnect as per NEC (National Electrical Code) requirements, of adequate size. All
field wiring must comply with NEC and local requirements. Route power lines through the corner post openings as
shown in Fig. 1 and Fig. 2.
Operating voltage to compressor must be within voltage range indicated on unit nameplate. On 3-phase units,
voltages between phases must be balanced within 2% and the current must be balanced within 10%.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage.
The correct power phasing is critical in the operation of the scroll compressors. An incorrect phasing will cause the compressor
to rotate in the wrong direction. This may lead to premature compressors failure.
WARNING
ELECTRIC SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Do not use gas piping as an electrical ground. Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize
the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit
ground lug in control compartment, or conduit approved for electrical ground when installed in accordance with local electrical
codes or in absence of local codes, it is recommended that U.S.A standard ANSI/NFPA 70, National Electrical Code be followed.
FIELD CONTROL WIRING – Install a Carrier approved accessory thermostat assembly according to the installation
instructions included with the accessory. Locate thermostat assembly on a solid wall in the conditioned space to sense
average temperature. Route thermostat cable or equivalent single leads of no. 18 AWG (American Wire Gage)
colored wire from sub-base terminals through conduit in unit to low-voltage connection. Settings may be changed
slightly to provide a greater degree of comfort for a particular installation.
NOTE
IMPORTANT
For wire runs up to 50 ft, use no. 18 AWG insulated wire. For 50 to 75 ft, use no. 16 AWG insulated wire. For over 75 ft, use no.
14 AWG insulated wire. All wire larger than no. 18 AWG cannot be directly connected to the thermostat and will require a
junction box and splice at the thermostat.
Page 10
Electrical Data Table - 3
50TJM 18 - 34
Unit Size
18
24
28
34
Compressor
No.1
OFM
IFM Electric Heater
No.2
Max
Voltage
Power Supply
V / Ph / Hz
RLA
LRA
RLA
LRA Qty HP FLA
HP
FLA
207
253
230 / 3 / 60
23.2
164
29.5
195
2
1
6.6
4.0
11.0
-
-
84.3
110
207
253
230 / 3 / 60
23.2
164
29.5
195
2
1
6.6
4.0
11.0
110
506
460 / 3 / 60
11.2
75
14.7
95
2
1
3.3
4.8
6.8
69.0
-
100.0
414
28
-
43.0
50
414
506
460 / 3 / 60
11.2
75
14.7
95
2
1
3.3
4.8
6.8
60
420
400 / 3 / 60
12.2
73
16.7
123
2
1
3.9
4.0
6.4
34.5
-
51.6
342
28
-
47.3
60
342
420
400 / 3 / 60
12.2
73
16.7
123
2
1
3.9
4.0
6.4
60
253
230 / 3 / 60
29.5
195
29.5
195
2
1
6.6
5.5
14.3
30.3
-
47.3
207
21
-
93.9
110
207
253
230 / 3 / 60
29.5
195
29.5
195
2
1
6.6
5.5
14.3
460 / 3 / 60
14.7
95
14.7
95
2
1
3.3
6.2
8.3
92.9
-
150
506
37
-
134.0
414
48.0
60
414
506
460 / 3 / 60
14.7
95
14.7
95
2
1
3.3
6.2
8.3
70
420
400 / 3 / 60
16.7
123
16.7
123
2
1
3.9
5.5
8.3
46.4
-
68.4
342
37
-
53.7
70
342
420
400 / 3 / 60
16.7
123
16.7
123
2
1
3.9
5.5
8.3
70
253
230 / 3 / 60
30.1
225
30.1
225
2
1
6.6
5.5
14.3
39.7
-
60.0
207
28
-
95.2
125
207
253
230 / 3 / 60
30.1
225
30.1
225
2
1
6.6
5.5
14.3
460 / 3 / 60
16.7
114
16.7
114
2
1
3.3
6.2
8.3
92.9
-
150
506
37
-
134.0
414
52.5
60
414
506
460 / 3 / 60
16.7
114
16.7
114
2
1
3.3
6.2
8.3
70
420
400 / 3 / 60
19.2
140
19.2
140
2
1
3.9
5.5
8.3
46.4
-
68.4
342
37
-
59.3
70
342
420
400 / 3 / 60
19.2
140
19.2
140
2
1
3.9
5.5
8.3
207
253
230 / 3 / 60
48.1
245
48.1
245
2
1
6.6
7.5
19.0
207
253
230 / 3 / 60
48.1
245
48.1
245
2
1
6.6
7.5
19.0
28
37
39.7
92.9
414
506
460 / 3 / 60
18.6
125
18.6
125
2
1
3.3
9.0
11.5
414
506
460 / 3 / 60
18.6
125
18.6
125
2
1
3.3
9.0
11.5
37
46.4
72.4
80
342
420
400 / 3 / 60
23.7
145
23.7
145
2
1
3.9
7.5
11.0
-
-
72.1
90
342
420
400 / 3 / 60
23.7
145
23.7
145
2
1
3.9
7.5
11.0
28
39.7
72.1
90
Appl. KW
FLA
Legend and Notes for Electrical Data Table
FLA - Full Load Amps
NEC - National Electrical Code
IFM - Indoor (Evaporator) Fan Motor
OFM - Outdoor (Condenser) Fan Motor
RLA - Rated Load Amps
LRA - Locked Rotor Amps
HACR - Heating, Air-Conditioning and Refrigeration
MCA - Minimum Circuit Amps
MOCP - Maximum Overcurrent Protection
◊ Fuse or HACR Circuit Breaker
Application heater kW (Using multiplication factor table in Electric Resistance Heater Data Table)
Unbalanced 3-Phase Supply Voltage
Never operate a motor where phase imbalance in supply voltage is greater than 2%.
Use the following formula to determine the percentage of voltage imbalance
= 100 X
MCA MOCP ◊
Min
Voltage
Maximum Deviation From Average Voltage
Average Voltage
Example: Supply Voltage is 400V - 3ph - 60Hz
392 + 404 + 395
AB = 392v
Average Voltage =
3
BC = 404v
AC = 395v
1191
= 397V
=
3
Determine maximum deviation from average voltage.
(AB) 397 - 392 =5v
(BC) 404 - 397 =7v
(AC) 457 - 397 =2v
Maximum Deviation is 7v.
Determine Percentage Voltage Imbalance.
7
% Voltage Imbalance = 100 X
= 1.76%
397
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
Page 11
60.0
70
140.4
175
140.4
175
60.0
70
Electric Resistance Heater Data Table - 4
Accessory Heater Part Number
UNIT
50TJM
18
24
28
34
400V
230V
Complete Kit P.N.
50TJ600201
50TJ601161
50TJ600729
Casing P.N.
( 1 Per Kit )
50TJ600289
50TJ600727
Heater Element P.N.
( 2 Per Kit )
CPHEATER030A00
CPHEATER031A00
Complete Kit P.N.
Casing P.N.
( 1 Per Kit )
50TJ600287
50TJ601162
50TJ600289
50TJ600730
50TJ600727
Heater Element P. N.
( 2 Per Kit )
CPHEATER036A00
CPHEATER037A00
Electric Heater Kits
Kit Ordering No
50TJ600201
50TJ600287
50TJ601161
50TJ601162
50TJ600729
50TJ600730
Description
Duct heater assembly, 50TJM 18, @240 V
Duct heater assembly, 50TJM 18, @480 V
Duct heater assembly, 50TJM 24, @240 V
Duct heater assembly, 50TJM 24, @480 V
Duct heater assembly, 50TJM 28 - 34, @240 V
Duct heater assembly, 50TJM 28 - 34, @480 V
Stages
2
2
2
2
2
2
Size (KW)
30
30
40
40
40
40
NOTE: Heaters are rated at 240 and 480 V. Use the Multiplication Factors table below to determine heater capacity for your particular voltage.
Multiplication Factors
Heater
Rating
V 240
lt
480
200
0.694
—
208
0.751
—
230
0.918
—
Actual Heater Voltage
240
380
1
—
—
0.62
400
—
0.7
460
—
0.92
480
—
1
NOTE: The following equation converts kW of heat energy to Btuh: kW x 3.413 = Btuh.
EXAMPLE: 30 kW (at 480 v) heater on 400 v
= 30.0 (0.7 multiplication factor)
= 21kW
Heater capacity(kW) is based on heater voltage of 240v or 480v. If power distribution voltage to unit varies from heater voltage, heater kW will vary
accordindly. To Detemine heater capacity at actual unit voltage, muptiply 480v capacity by multipliers found in table " Multiplication Factors" above.
MCA calculation for 50TJM 18 - 34 size units with electric heaters over 50 kW = (1.25 x IFM amps) + (1.00 x heater FLA).
Page 12
Fig:- 6
Page 13
Fig:- 7
Page 14
Fig:- 8
Page 15
Fig:- 9
Page 16
Fig:- 10
Page 17
Fig:- 11
Page 18
3 – START-UP INSTRUCTIONS
PRIOR to unit start-up use the following instructions and start-up checklist provided on the last page .
3.1– Unit Preparation
Check that unit has been installed in accordance with these installation instructions and all applicable codes.
3.2 – Internal Wiring
Check all electrical connections in unit control boxes; tighten as required.
3.3 – Compressor Mounting
Compressors are internally spring mounted. Do not loosen or remove compressor hold down bolts.
3.4 – Refrigerant Service Ports
Each refrigerant system has a total of 3 Schrader type Service gage ports. One port is located on the suction line,
one on the compressor discharge line, and one on the liquid line. In addition Schrader-type valves are located
underneath the pressure switches. Be sure that caps on the ports are tight.
3.5 – Compressor Rotation
It is important to be certain the compressors are rotating in the proper direction. To determine whether or not
compressors are rotating in the proper direction:
1. Connect service gages to suction and discharge pressure fittings.
2. Energize the compressor.
3. The suction pressure should drop and the discharge pressure should rise, as is normal on any start-up.
If the suction pressure does not drop and the discharge pressure does not rise to normal levels:
1. Note that the evaporator fan is probably also rotating in the wrong direction.
2. Turn off power to the unit.
3. Reverse any two of the compressor lead wires.
4. Turn on power to the compressor.
5. Check also phase monitor all ok green led before proceeding.
The suction and discharge pressure levels should now move to their normal start-up levels.
NOTE
IMPORTANT
When compressors are rotating in the wrong direction, the unit will have increased noise levels and will not provide heating and
cooling. After a few minutes of reverse operation, the scroll compressor internal overload protection will open, which will activate
the unit’s lockout and requires a manual reset. Reset accomplished by turning the thermostat on and off.
3.6 - Evaporator Fan
Fan belt and variable pulleys are factory installed. Remove tape from the fan pulley. See Table 5 for Air Quantity
Limits. See Table 7 for Fan Performance data. Be sure that fans rotate in the proper direction. See Table 6 for Fan
RPM at various fan motor pulley settings. To alter fan performance, see Evaporator Fan Performance Adjustment
section.
Unit
50TJM-18
50TJM-24
50TJM-28
50TJM-34
Freq.
50TJM
Cooling
Electric Heaters
Minimum
Maximum
Minimum
Maximum
4,000
6,500
4,800
6,500
5,000
8,000
6,000
8,000
5,000
9,000
7,000
9,000
7,000
10,000
7,000
10,000
Table 5 – Air Quantity Limits.
0
1/2
1
18
1020
24
1042
60Hz
1042
28
34
1002 968
933
Bold Fan RPM is Factory Setting
MOTOR PULLEY TURNS OPEN - English
1 1/2
2
2 1/2
3
3 1/2
4
4 1/2
994 969 934 904
867
841
808
1004 979 944 913
876
850
816
1004 979 944 913
876
850
816
902 876 850 823
806
789
772
Table 6 – Fan RPM at Motor Pulley Settings.
Page 19
5
780
788
788
756
5 1/2
749
757
757
739
6
725
732
732
722
3.7– Condenser Fans and Motors
Fans and motors are factory set. Refer to Condenser-Fan Adjustment Section as required.
3.8– Return – Air Filters
Check that correct filters are installed in filter tracks. See Table 1 “Physical data”. Do not operate unit without return
air filters.
3.9 – Base Unit Operation
COOLING, UNITS — 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, compressor no. 1
and condenser fans start. The condenser-fan motors run continuously while unit is cooling. If 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 — (If Accessory or Optional Heater is installed) — upon a call for heating through terminal W1,
IFC and heater contactor no. 1 (HC1) are energized.
4.0 – SERVICE
4.1 – Cleaning
Inspect unit interior at beginning of each heating and cooling season and as operating conditions require. Remove
unit top panel and/or side panels for access to unit interior.
EVAPORATOR COIL — Clean as required with a commercial coil cleaner.
CONDENSER COIL — Clean condenser coil annually and as required by location and outdoor-air conditions.
Inspect coil monthly and clean as required.
CONDENSATE DRAIN — Check and clean each year at start of cooling season.
FILTERS — Clean or replace at start of each heating and cooling season, or more often if operating conditions
require. Refer to Table 1 “Physical Data” type and size.
4.2 – Lubrication
Compressors are charged with the correct amount of oil at the factory.
Replacing Compressor - In the case of a motor burnout, the majority of contaminated will be removed with the
compressor. The rest of the oil is cleaned through the use of suction and liquid line filter driers. A 100% activated
alumna suction line filter drier is recommended but must be removed after 72 hours.
The compressor contains POE oil. POE oil has a high affinity for moisture. Do not remove the compressor’s tube
plugs until ready to insert the unit suction and discharge tube ends. The discharge connection plug should be
removed first before pulling the suction connection plug to allow the dry air pressure inside the compressor to
escape.
Note: This is only valid for the R410A systems.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in damage to components.
1. The compressor is in a Puron® refrigerant system and uses a (POE) lubricant Emkarate RL 32 3MAF. In
the field the oil level could be topped up with Mobil EAL Arctic 22 CC if 3MAF is not available. POE oil is
extremely hygroscopic, meaning it absorbs water readily. POE oils can absorb 15 times as much as
other oils designed for HCFC and CFC refrigerants. Avoid exposure of the oil to the atmosphere.
2. Ensure that system is not subjected to liquid abuse. Turn the crankcase heater on 12 hours before
starting the compressor.
CONDENSER AND EVAPORATOR-FAN MOTOR BEARINGS – The condenser and evaporator-fan motors have
permanently-sealed bearings, so no field lubrication is necessary.
Page 20
4.3 – Evaporator Fan Performance Adjustment
NOTE: To remove belts only, follow Steps 1, 2 & 6. Fan motor pulleys are factory set speed shown in Table 6.
To change fan speeds:
1. Shut off unit power supply.
2. Loosen belt by loosening fan motor mounting plate nuts. Slide the Motor and remove belt.
3. Loosen movable-pulley flange setscrew (see Fig. 12).
4. Screw movable flange toward fixed flange to increase speed and away from fixed flange to decrease speed.
Increasing fan speed increases load on motor. Do not exceed maximum speed specified in Table 6. See Table 7 for
air flow.
5. Set movable flange at nearest keyway of pulley hub and tighten setscrew. (See Table 1 & 6 for speed change for
each full turn of pulley flange.)
6. Replace and tighten belts. See Belt Tension Adjustment section on Table 1.
To align fan and motor pulleys:
1. Loosen fan pulley setscrews.
2. Slide fan pulley along fan shaft.
3. Make angular alignment by loosening motor from mounting plate.
4.4 – Evaporator Fan Service and Replacement
1. Remove supply-air section panel (The bolts holding the flexible connection to the panel should be removed).
2. Remove the Control Side panel.
3. Remove the Belt (refer to the previous section for Belt removal).
4. Remove the locking device of the hub & shaft from the both sides; it can be accessed throw the fan side panel.
5. Pull the shaft gently from the control side, the blower will fall inside the blower housing.
6. Loosen the (lower) first two bolts from each side of the scroll fan housing mid-plate. This can be done from the
supply panel side, now the fan can be removed easily from the supply panel side.
7. To assemble the fan, reverse the above procedure.
Fig. 12 Evaporator – Fan Pulley Alignment and Adjustment
4.5 – Belt Tension Adjustment
To adjust belt tension:
1. Loosen fan motor bolts.
2. Adjust belt tension by sliding the motor on the mounting base.
3. Tighten nuts.
4. Adjust bolts and nut on mounting plate to secure motor in fixed position.
4.6 – Condenser-Fan Adjustment
1. Shut off unit power supply.
2. Remove fan top-grille assembly and loosen fan hub screws.
3. Adjust fan height on unit, using a straightedge placed across the fan orifice.
4. Tighten setscrews
Fig. 13 Condenser - Fan Adjustment
Page 21
4.7 – Refrigerant Charge
Amount of refrigerant charge is listed on unit nameplate and in Table 1. Refer to Carrier GTAC II; Module 5;
Charging, Recovery, Recycling, and Reclamation section for charging methods and procedures. Unit panels must be
in place when unit is operating during charging procedure.
NOTE: Do not use recycled refrigerant as it may contain contaminants.
NO CHARGE — Use standard evacuating techniques. After evacuating system, weight in the specified amount of
refrigerant (refer to Table 1).
LOW CHARGE COOLING — Using cooling charging chart (see Fig. 14 to 18 according to the size of the unit) Add
or remove refrigerant until conditions of the chart are met. Note that charging chart is different from those normally
used. An accurate pressure gage and temperature-sensing device is required. Charging is accomplished by
ensuring the proper amount of liquid sub-cooling. Measure liquid line pressure at the liquid line service valve using
pressure gage.
Connect temperature sensing device to the liquid line near the liquid line service valve and insulate it so that outdoor
ambient temperature does not affect reading.
TO USE THE COOLING CHARGING CHART — Use the above temperature and pressure readings, and find the
intersection point on the cooling charging chart. If intersection point on chart is above line, add refrigerant. If
intersection point on chart is below line, carefully recover some of the charge. Recheck suction pressure as charge
is adjusted.
NOTE: Indoor-air CFM must be within normal operating range of unit. All outdoor fans must be operating.
4.8 – Protective Devices
COMPRESSOR PROTECTION – Each compressor is internally protected against over temperature.
Compressor Lockout — If any of the safeties (high-pressure, low-pressure, compressor internal thermostat, external
compressor thermal overload) trip, the CLO (compressor lockout) will lock the compressors off.
To reset, manually move the thermostat setting.
EVAPORATER AND CONDENSER-FAN MOTOR PROTECTION — Each Evaporator and Condenser-fan motor is
internally protected against over temperature.
HIGH- AND LOW-PRESSURE SWITCHES — If either switch trips, or if the compressor over temperature switch
activates, that refrigerant circuit will be automatically locked out by the CLO. To reset, manually move the thermostat
setting.
FREEZE PROTECTION THERMOSTAT (FPT) — An FPT is located on the top and bottom of the evaporator coil. It
detects frost build-up and turns off the compressor, allowing the coil to clear. Once the frost has melted, the
compressor can be reenergized.
NOTE
IMPORTANT
After prolonged shutdown or servicing in cold weather, energize the crankcase heaters for 12 hours before
starting the compressors.
4.9 – Control Circuit, 24-V
This control circuit is protected against over-current by a 3.2-amp circuit breaker. Breaker can be reset. If it trips,
determine cause of trouble before resetting.
5.0 – REPLACEMENT PARTS
A complete list of replacement parts may be obtained from any Carrier distributor.
Page 22
Fan Performance Table - 7
Unit 50TJM - 18 - 15 Tons - 230V and 400V - 60Hz - (Standard Motor)
Available External Static Pressure (in. wg)
Air flow Rate
0.2
0.4
0.6
0.8
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
583
1.25
1.38
654
1.52
1.68
721
1.82
2.02
775
2.14
4000
619
1.61
1.78
686
1.91
2.11
747
2.22
2.46
807
2.56
4500
656
2.03
2.25
716
2.35
2.60
775
2.69
2.98
830
3.04
5000
692
2.52
2.79
747
2.86
3.17
802
3.22
3.57
855
3.60
5500
730
3.06
3.39
777
3.43
3.79
828
3.80
4.21
877
4.20
6000
757
3.69
4.09
805
4.05
4.48
853
4.44
4.92
899
4.86
6500
BHP
2.36
2.83
3.37
3.98
4.65
5.38
RPM
835
865
885
905
927
945
1
KWI
2.47
2.91
3.42
3.98
4.61
5.29
BHP
2.73
3.22
3.78
4.41
5.10
5.85
Unit 50TJM - 18 - 15 Tons - 230V and 400V - 60Hz - (Standard Motor) (Continued)
Available External Static Pressure (in. wg)
Air flow Rate
1.2
1.4
1.6
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
893
2.81
3.11
967
3.26
3.61
990
3.52
3.90
1019
4000
919
3.28
3.63
972
3.65
4.04
1015
3.99
4.42
1068
4500
937
3.73
4.13
987
4.20
4.65
1036
4.61
5.11
1082
5000
955
4.39
4.86
1003
4.81
5.32
1050
5.23
5.79
1096
5500
973
5.03
5.57
1019
5.47
6.05
1064
5.92
6.55
1108
6000
990
5.73
6.34
1033
6.17
6.84
1076
6.64
7.35
1119
6500
1.8
KWI
3.73
4.30
4.90
5.55
6.25
6.99
BHP
4.13
4.76
5.42
6.14
6.92
7.74
RPM
1092
1116
1128
1139
1150
1160
2
KWI
4.28
4.84
5.45
6.12
6.85
7.61
BHP
4.74
5.36
6.04
6.78
7.58
8.42
Unit 50TJM - 18 - 15 Tons - 460V - 60Hz - (Standard Motor)
Available External Static Pressure (in. wg)
Air flow Rate
0.2
0.4
0.6
0.8
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
583
1.25
1.38
654
1.52
1.68
722
1.82
2.02
775
2.14
4000
619
1.61
1.78
686
1.91
2.11
747
2.22
2.46
807
2.56
4500
656
2.03
2.25
716
2.35
2.60
775
2.69
2.98
830
3.04
5000
692
2.52
2.79
747
2.86
3.17
802
3.22
3.57
855
3.60
5500
730
3.06
3.39
777
3.43
3.79
828
3.80
4.21
877
4.20
6000
757
3.68
4.07
805
4.05
4.48
853
4.44
4.92
899
4.86
6500
BHP
2.36
2.83
3.37
3.98
4.65
5.38
RPM
835
865
885
905
927
945
1
KWI
2.47
2.91
3.42
3.98
4.61
5.29
BHP
2.73
3.22
3.78
4.41
5.10
5.85
Unit 50TJM - 18 - 15 Tons - 460V - 60Hz - (Standard Motor) (Continued)
Available External Static Pressure (in. wg)
Air flow Rate
1.2
1.4
1.6
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
893
2.81
3.11
967
3.26
3.61
988
3.52
3.90
1020
4000
919
3.28
3.63
972
3.65
4.04
1018
4.01
4.44
1070
4500
937
3.80
4.21
987
4.20
4.65
1036
4.61
5.11
1082
5000
955
4.39
4.86
1003
4.81
5.32
1050
5.23
5.79
1096
5500
973
5.03
5.57
1019
5.47
6.05
1064
5.92
6.55
1108
6000
990
5.73
6.34
1033
6.17
6.84
1076
6.64
7.35
1119
6500
BHP
4.15
4.76
5.42
6.14
6.92
7.74
RPM
1106
1116
1128
1139
1150
1160
2
KWI
4.28
4.84
5.45
6.12
6.85
7.61
BHP
4.74
5.36
6.04
6.78
7.58
8.42
1.8
KWI
3.75
4.30
4.90
5.55
6.25
6.99
Legend:
Bold , Italics - Standard Motor and Drive Package. In range of ±5% due to different voltage application (230V, 400V and 460V).
RPM - Revolutions Per Minute
KWI - Kilo Watts Input to Motor
BHP - Brake Horsepower Input to Fan
CFM - Cubic Feet per Minute
in.wg - Inch Water Gage
Notes:
1. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operatin cfm.
2. Static Pressure (i.e Filters) 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.
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. Bold data shows the range of air flow rate for unit management system, other rpms require field-supplied drive.
7. Use of field-supplied motor may affect wiring size. Contact your Carrier representative for details.
8. Conversion - Bhp to KWI
Bhp X 0.746
KWI=
Motor efficiency
Page 23
Fan Performance Table - 7(Continued)
Unit 50TJM - 24 - 19 Tons - 230V and 400V - 60Hz - (Standard Motor)
Available External Static Pressure (in. wg)
Air flow Rate
0.2
0.4
0.6
0.8
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
562
1.47
1.66
619
1.72
1.95
673
1.98
2.25
726
2.26
5000
595
1.84
2.09
648
2.11
2.39
698
2.39
2.70
747
2.68
5500
631
2.28
2.58
679
2.56
2.90
725
2.85
3.23
771
3.16
6000
665
2.77
3.14
709
3.07
3.48
753
3.38
3.83
796
3.71
6500
699
3.34
3.79
741
3.66
4.14
782
3.98
4.51
823
4.32
7000
734
3.99
4.51
774
4.31
4.89
812
4.66
5.28
851
5.01
7500
767
4.60
5.20
809
4.97
5.63
849
5.37
6.08
889
5.78
8000
BHP
2.56
3.03
3.58
4.20
4.90
5.68
6.55
RPM
776
795
817
839
863
888
929
1
KWI
2.55
2.99
3.48
4.05
4.68
5.38
6.20
BHP
2.89
3.38
3.95
4.58
5.30
6.09
7.03
Unit 50TJM - 24 - 19 Tons - 230V and 400V - 60Hz - (Standard Motor) (Continued)
Available External Static Pressure (in. wg)
Air flow Rate
1.2
1.4
1.6
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
825
2.86
3.24
873
3.17
3.59
919
3.50
3.96
963
5000
842
3.31
3.74
887
3.63
4.12
932
3.97
4.50
973
5500
861
3.82
4.33
904
4.17
4.72
945
4.52
5.11
986
6000
880
4.39
4.97
921
4.75
5.38
963
5.12
5.80
1001
6500
902
5.03
5.70
941
5.41
6.13
979
5.80
6.57
1017
7000
925
5.75
6.51
963
6.14
6.96
998
6.54
7.41
1035
7500
967
6.63
7.51
1006
7.08
8.02
1044
7.54
8.54
1082
8000
1.8
KWI
3.82
4.32
4.88
5.50
6.19
6.95
8.02
BHP
4.33
4.89
5.53
6.23
7.01
7.88
9.08
RPM
1005
1014
1026
1039
1055
1070
1118
2
KWI
4.16
4.68
5.26
5.89
6.60
7.37
8.50
BHP
4.72
5.30
5.95
6.68
7.47
8.35
9.63
Unit 50TJM - 24 - 19 Tons - 460V - 60Hz - (Standard Motor)
Available External Static Pressure (in. wg)
Air flow Rate
0.2
0.4
0.6
0.8
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
562
1.47
1.66
619
1.72
1.95
673
1.98
2.25
726
2.26
5000
595
1.84
2.09
648
2.11
2.39
698
2.39
2.70
747
2.68
5500
631
2.28
2.58
679
2.56
2.90
725
2.85
3.23
771
3.16
6000
665
2.77
3.14
709
3.07
3.48
753
3.38
3.83
796
3.71
6500
699
3.34
3.79
741
3.66
4.14
782
3.98
4.51
823
4.32
7000
734
3.99
4.51
774
4.31
4.89
812
4.66
5.28
851
5.01
7500
767
4.60
5.20
809
4.97
5.63
849
5.37
6.08
889
5.78
8000
BHP
2.56
3.03
3.58
4.20
4.90
5.68
6.55
RPM
776
795
817
839
863
888
929
1
KWI
2.55
2.99
3.48
4.05
4.68
5.38
6.20
BHP
2.89
3.38
3.95
4.58
5.30
6.09
7.03
Unit 50TJM - 24 - 19 Tons - 460V - 60Hz - (Standard Motor) (Continued)
Available External Static Pressure (in. wg)
Air flow Rate
1.2
1.4
1.6
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
825
2.86
3.24
873
3.17
3.59
919
3.50
3.96
963
5000
842
3.31
3.74
887
3.63
4.12
932
3.97
4.50
973
5500
861
3.82
4.33
904
4.17
4.72
945
4.52
5.11
986
6000
880
4.39
4.97
921
4.75
5.38
963
5.12
5.80
1001
6500
902
5.03
5.70
941
5.41
6.13
979
5.80
6.57
1017
7000
925
5.75
6.51
963
6.14
6.96
998
6.54
7.41
1035
7500
967
6.63
7.51
1006
7.08
8.02
1044
7.54
8.54
1082
8000
BHP
4.33
4.89
5.53
6.23
7.01
7.88
9.08
RPM
1005
1014
1026
1039
1055
1070
1118
2
KWI
4.16
4.68
5.26
5.89
6.60
7.37
8.50
BHP
4.72
5.30
5.95
6.68
7.47
8.35
9.63
1.8
KWI
3.82
4.32
4.88
5.50
6.19
6.95
8.02
Legend:
Bold , Italics - Standard Motor and Drive Package. In range of ±5% due to different voltage application (230V, 400V and 460V)
RPM - Revolutions Per Minute
KWI - Kilo Watts Input to Motor
BHP - Brake Horsepower Input to Fan
CFM - Cubic Feet per Minute
in.wg - Inch Water Gage
Notes:
1. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operatin cfm.
2. Static Pressure (i.e Filters) 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.
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. Bold data shows the range of air flow rate for unit management system, other rpms require field-supplied drive.
7. Use of field-supplied motor may affect wiring size. Contact your Carrier representative for details.
8. Conversion - Bhp to KWI
Bhp X 0.746
KWI=
Motor efficiency
Page 24
Fan Performance Table - 7(Continued)
Unit 50TJM - 28 - 23 Tons - 230V and 400V - 60Hz - (Standard Motor)
Available External Static Pressure (in. wg)
Air flow Rate
0.2
0.4
0.6
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
5000
501
1.10
1.25
554
1.32
1.50
606
1.56
1.77
656
5500
529
1.36
1.54
579
1.60
1.81
627
1.85
2.09
673
6000
558
1.66
1.88
603
1.90
2.15
648
2.16
2.45
692
6500
586
2.00
2.27
628
2.25
2.55
670
2.54
2.87
711
7000
614
2.38
2.70
654
2.66
3.01
693
2.94
3.33
732
7500
643
2.82
3.19
680
3.10
3.52
717
3.40
3.85
753
8000
669
3.29
3.73
706
3.58
4.06
740
3.90
4.42
775
8500
696
3.79
4.30
796
734
4.11
4.65
761
4.44
5.03
806
5.11
5.79
842
9000
737
4.37
4.95
777
4.73
5.36
0.8
KWI
1.83
2.12
2.45
2.82
3.23
3.70
4.22
4.77
5.49
BHP
2.07
2.40
2.77
3.19
3.66
4.20
4.78
5.40
6.21
RPM
704
717
733
750
769
789
809
829
877
1
KWI
2.11
2.39
2.74
3.13
3.55
4.03
4.56
5.10
5.88
BHP
2.39
2.71
3.11
3.54
4.02
4.57
5.17
5.78
6.66
Unit 50TJM - 28 - 23 Tons - 230V and 400V - 60Hz - (Standard Motor) (Continued)
Available External Static Pressure (in. wg)
Air flow Rate
1.2
1.4
1.6
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
5000
750
2.40
2.72
796
2.72
3.08
841
3.06
3.47
885
5500
762
2.71
3.07
805
3.03
3.43
847
3.38
3.83
888
6000
775
3.06
3.47
815
3.38
3.83
855
3.73
4.22
894
6500
789
3.44
3.90
829
3.78
4.28
866
4.13
4.68
903
914
7000
806
3.88
4.39
843
4.23
4.79
879
4.58
5.19
894
5.08
5.76
926
7500
824
4.37
4.95
859
4.72
5.35
8000
842
4.90
5.55
876
5.26
5.95
908
5.63
6.38
941
8500
861
5.46
6.19
892
5.84
6.61
923
6.22
7.04
953
9000
911
6.29
7.13
944
6.72
7.61
977
7.16
8.11
1009
1.8
KWI
3.42
3.74
4.09
4.49
4.95
5.45
6.01
6.60
7.60
BHP
3.87
4.23
4.63
5.09
5.61
6.18
6.81
7.48
8.61
RPM
926
927
933
939
949
960
973
984
1042
2
KWI
3.80
4.11
4.47
4.87
5.33
5.85
6.42
7.01
8.07
BHP
4.31
4.65
5.06
5.52
6.04
6.62
7.27
7.94
9.14
Unit 50TJM - 28 - 23 Tons - 460V - 60Hz - (Standard Motor)
Available External Static Pressure (in. wg)
Air flow Rate
0.2
0.4
0.6
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
5000
501
1.10
1.25
554
1.32
1.50
606
1.56
1.77
656
5500
529
1.36
1.54
579
1.60
1.81
627
1.85
2.09
673
6000
558
1.66
1.88
603
1.90
2.15
648
2.16
2.45
692
6500
586
2.00
2.27
628
2.25
2.55
670
2.54
2.87
711
7000
614
2.38
2.70
654
2.66
3.01
693
2.94
3.33
732
7500
643
2.82
3.19
680
3.10
3.52
717
3.40
3.85
753
8000
669
3.29
3.73
706
3.58
4.06
740
3.90
4.42
775
8500
696
3.79
4.30
734
4.11
4.65
761
4.44
5.03
796
842
9000
737
4.37
4.95
777
4.73
5.36
806
5.11
5.79
0.8
KWI
1.83
2.12
2.45
2.82
3.23
3.70
4.22
4.77
5.49
BHP
2.07
2.40
2.77
3.19
3.66
4.20
4.78
5.40
6.21
RPM
704
717
733
750
769
789
809
829
877
1
KWI
2.11
2.39
2.74
3.13
3.55
4.03
4.56
5.10
5.88
BHP
2.39
2.71
3.11
3.54
4.02
4.57
5.17
5.78
6.66
Unit 50TJM - 28 - 23 Tons - 460V - 60Hz - (Standard Motor) (Continued)
Available External Static Pressure (in. wg)
Air flow Rate
1.2
1.4
1.6
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
5000
750
2.40
2.72
796
2.72
3.08
841
3.06
3.47
885
5500
762
2.71
3.07
805
3.03
3.43
847
3.38
3.83
888
6000
775
3.06
3.47
815
3.38
3.83
855
3.73
4.22
894
6500
789
3.44
3.90
829
3.78
4.28
866
4.13
4.68
903
7000
806
3.88
4.39
843
4.23
4.79
879
4.58
5.19
914
926
7500
824
4.37
4.95
859
4.72
5.35
894
5.08
5.76
908
5.63
6.38
941
8000
842
4.90
5.55
876
5.26
5.95
8500
861
5.46
6.19
892
5.84
6.61
923
6.22
7.04
953
9000
911
6.29
7.13
944
6.72
7.61
977
7.16
8.11
1009
1.8
KWI
3.42
3.74
4.09
4.49
4.95
5.45
6.01
6.60
7.60
BHP
3.87
4.23
4.63
5.09
5.61
6.18
6.81
7.48
8.61
RPM
926
927
933
939
949
960
973
984
1042
2
KWI
3.80
4.11
4.47
4.87
5.33
5.85
6.42
7.01
8.07
BHP
4.31
4.65
5.06
5.52
6.04
6.62
7.27
7.94
9.14
Legend:
Bold , Italics - Standard Motor and Drive Package. In range of ±5% due to different voltage application (230V, 400V and 460V)
RPM - Revolutions Per Minute
KWI - Kilo Watts Input to Motor
BHP - Brake Horsepower Input to Fan
CFM - Cubic Feet per Minute
in.wg - Inch Water Gage
Notes:
1. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operatin cfm.
2. Static Pressure (i.e Filters) 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.
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. Bold data shows the range of air flow rate for unit management system, other rpms require field-supplied drive.
7. Use of field-supplied motor may affect wiring size. Contact your Carrier representative for details.
8. Conversion - Bhp to KWI
Bhp X 0.746
KWI=
Motor efficiency
Page 25
Fan Performance Table - 7(Continued)
Unit 50TJM - 34 - 28 Tons - 230V and 400V - 60Hz - (Standard Motor)
Available External Static Pressure (in. wg)
Air flow Rate
0.2
0.4
0.6
0.8
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
602
2.72
3.13
641
3.03
3.49
679
3.35
3.86
717
3.70
7000
630
3.22
3.71
667
3.54
4.08
704
3.89
4.48
739
4.23
7500
659
3.77
4.35
693
4.11
4.74
727
4.46
5.14
761
4.83
8000
687
4.38
5.05
720
4.74
5.47
753
5.12
5.90
784
5.49
8500
715
5.05
5.83
746
5.43
6.26
777
5.81
6.70
808
6.21
9000
741
5.77
6.66
771
6.16
7.10
800
6.51
7.50
829
6.97
9500
768
6.51
7.50
797
6.97
8.03
825
7.38
8.50
853
7.80
10000
BHP
4.27
4.88
5.57
6.33
7.16
8.03
8.99
RPM
753
773
794
816
838
859
880
1
KWI
4.05
4.61
5.22
5.89
6.49
7.39
8.23
BHP
4.67
5.31
6.01
6.78
7.49
8.52
9.49
Unit - 50TJM - 34 - 28 Tons - 230 & 400V - 60Hz - (Standard Motor) (Continued)
Available External Static Pressure (in. wg)
Air flow Rate
1.2
1.4
1.6
1.8
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
790
4.43
5.11
826
4.82
5.55
861
5.23
6.03
895
5.65
7000
808
4.99
5.75
842
5.39
6.21
875
5.80
6.68
907
6.22
7500
827
5.61
6.47
860
6.02
6.94
891
6.44
7.43
922
6.88
8000
847
6.30
7.26
878
6.72
7.74
908
7.15
8.25
938
7.59
8500
867
7.03
8.10
897
7.46
8.60
927
7.91
9.12
955
8.37
9000
887
7.82
9.02
914
8.26
9.52
943
8.72
10.05
970
9.18
9500
907
8.68
10.01
934
9.13
10.52
961
9.60
11.06
988
10.08
10000
BHP
6.51
7.17
7.93
8.75
9.65
10.58
11.62
RPM
929
940
953
967
984
998
1014
2
KWI
6.08
6.52
7.33
8.05
8.84
9.66
10.57
BHP
7.01
7.52
8.45
9.28
10.19
11.14
12.18
Unit - 50TJM - 34 - 28 Tons - 460V - 60Hz - (Standard Motor)
Available External Static Pressure (in. wg)
Air flow Rate
0.2
0.4
0.6
0.8
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
602
2.72
3.13
641
3.03
3.49
679
3.35
3.86
717
3.70
7000
630
3.22
3.71
667
3.54
4.08
704
3.89
4.48
739
4.23
7500
659
3.77
4.35
693
4.11
4.74
727
4.46
5.14
761
4.83
8000
687
4.38
5.05
720
4.74
5.47
753
5.12
5.90
784
5.49
8500
715
5.05
5.83
746
5.43
6.26
777
5.81
6.70
808
6.21
9000
741
5.77
6.66
771
6.16
7.10
800
6.56
7.56
829
6.97
9500
768
6.56
7.56
797
6.97
8.03
825
7.38
8.50
853
7.80
10000
BHP
4.27
4.88
5.57
6.33
7.16
8.03
8.99
RPM
753
773
794
816
838
859
880
1
KWI
4.05
4.61
5.22
5.89
6.62
7.39
8.23
BHP
4.67
5.31
6.01
6.78
7.63
8.52
9.49
Unit - 50TJM - 34 - 28 Tons - 460V - 60Hz - (Standard Motor) (Continued)
Available External Static Pressure (in. wg)
Air flow Rate
1.2
1.4
1.6
1.8
(CFM)
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
BHP
RPM
KWI
790
4.43
5.11
826
4.82
5.55
861
5.23
6.03
895
5.65
7000
808
4.99
5.75
842
5.39
6.21
875
5.80
6.68
907
6.22
7500
827
5.61
6.47
860
6.02
6.94
891
6.44
7.43
922
6.88
8000
847
6.30
7.26
878
6.72
7.74
908
7.15
8.25
938
7.59
8500
867
7.03
8.10
897
7.46
8.60
927
7.91
9.12
955
8.37
9000
887
7.82
9.02
914
8.26
9.52
943
8.72
10.05
970
9.18
9500
907
8.68
10.01
934
9.13
10.52
961
9.60
11.06
988
10.08
10000
BHP
6.51
7.17
7.93
8.75
9.65
10.58
11.62
RPM
929
940
953
967
984
998
1014
2
KWI
6.08
6.67
7.33
8.05
8.84
9.66
10.57
BHP
7.01
7.69
8.45
9.28
10.19
11.14
12.18
Legend:
Bold , Italics - Standard Motor and Drive Package. In range of ±5% due to different voltage application (230V, 400V and 460V)
RPM - Revolutions Per Minute
KWI - Kilo Watts Input to Motor
BHP - Brake Horsepower Input to Fan
CFM - Cubic Feet per Minute
in.wg - Inch Water Gage
Notes:
1. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operatin cfm.
2. Static Pressure (i.e Filters) 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.
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. Bold data shows the range of air flow rate for unit management system, other rpms require field-supplied drive.
7. Use of field-supplied motor may affect wiring size. Contact your Carrier representative for details.
8. Conversion - Bhp to KWI
Bhp X 0.746
KWI=
Motor efficiency
Page 26
Charging Chart
140
Charging Chart 50TJM-18 - Fig 14
Circuit #1
All outdoor fans must be operating
Liqiued Temperature at Valve (F)
130
120
Add charge above upper curve
110
100
90
80
Reduce charge below lower curve
70
60
50
40
150
200
250
300
350
400
450
500
550
600
Liquid Pressure (PSIG)
Fig - 14 Charging Chart for 50TJM - 18 (Circuit #1)
140
Charging Chart 50TJM-18 - Fig 15
Liqiued Temperature at Valve (F)
130
Circuit #2
All outdoor fans must be operating
120
Add charge above upper curve
110
100
90
80
Reduce charge below lower curve
70
60
50
40
150
200
250
300
350
400
450
Liquid Pressure (PSIG)
Fig - 15 Charging Chart for 50TJM - 18 (Circuit #2)
Page 27
500
550
600
Charging Chart (Continued)
140
Charging Chart 50TJM-24 - Fig 16
Liqiued Temperature at Valve (F)
130
Both Circuits
All outdoor fans must be operating
120
Add charge above upper curve
110
100
90
80
Reduce charge below lower curve
70
60
50
40
150
200
250
300
350
400
450
500
550
600
Liquid Pressure (PSIG)
Fig - 16 Charging Chart for 50TJM - 24
140
Charging Chart 50TJM-28 - Fig 17
Liqiued Temperature at Valve (F)
130
Both Circuits
All outdoor fans must be operating
120
Add charge above upper curve
110
100
90
80
Reduce charge below lower curve
70
60
50
40
150
200
250
300
350
400
450
Liquid Pressure (PSIG)
Fig - 17 Charging Chart for 50TJM - 28
Page 28
500
550
600
Charging Chart (Continued)
140
CHARGING CHART 50TJM34 - Fig 18
Both Circuits
All outdoor fans must be operating
130
Liqiued Temperature at Valve (F)
120
Add charge above upper curve
110
100
90
80
Reduce charge below lower curve
70
60
50
40
150
200
250
300
350
400
Liquid Pressure (PSIG)
Fig - 18 Charging Chart for 50TJM - 34
Page 29
450
500
550
600
Troubleshooting Guide
Table 8 — Cooling Service Analysis
PROBLEM
CAUSE
REMEDY
Compressor and condenser fan will not
start.
Power failure.
Call power company.
Fuse blown or circuit breaker tripped.
Replace fuse or reset circuit breaker.
Defective thermostat, contactor, transformer, or control Replace component.
relay.
Insufficient line voltage.
Determine cause and correct.
Incorrect or faulty wiring.
Check wiring diagram and rewire correctly.
Thermostat setting too high.
Lower thermostat setting below room
temperature.
Check wiring and repair or replace.
Compressor will not start but condenser Faulty wiring or loose connections in compressor
fan runs.
circuit.
Compressor motor burned out, seized, or internal over- Determine cause. Replace compressor.
load open.
Defective overload.
Determine cause and replace.
Compressor locked out
Determine cause for safety trip and reset lockout.
One leg of 3-phase power dead.
Replace fuse or reset circuit breaker.
Determine cause.
Recover refrigerant, evacuate system, and
recharge to nameplate.
Replace and determine cause.
Compressor cycles (other than normally Refrigerant overcharge or undercharge.
satisfying thermostat).
Defective compressor.
Insufficient line voltage.
Compressor operates continuously.
Determine cause and correct.
Blocked condenser.
Determine cause and correct.
Defective overload.
Determine cause and replace.
Defective thermostat.
Replace thermostat.
Faulty condenser-fan motor.
Replace.
Restriction in refrigerant system.
Locate restriction and remove.
Dirty air filter.
Replace filter.
Unit undersized for load.
Decrease load or increase unit size.
Thermostat set too low.
Reset thermostat.
Low refrigerant charge.
Locate leak, repair, and recharge.
Air in system.
Recover refrigerant, evacuate system, and
recharge.
Clean coil or remove restriction.
Condenser coil dirty or restricted.
Excessive head pressure.
Head pressure too low.
Excessive suction pressure.
Suction pressure too low.
Dirty drier filter.
Replace filter.
Dirty condenser coil.
Clean coil.
Refrigerant overcharged.
Recover excess refrigerant.
Faulty TXV.
1. Check TXV bulb mounting and secure tightly to
suction line.
2. Replace TXV if stuck open or closed.
Air in system.
Condenser air restricted or air short-cycling.
Recover refrigerant, evacuate system, and
recharge.
Determine cause and correct.
Low refrigerant charge.
Check for leaks, repair, and recharge.
Restriction in liquid tube.
Remove restriction.
High heat load.
Check for source and eliminate.
Faulty TXV.
1. Check TXV bulb mounting and secure tightly to
suction line.
2. Replace TXV if stuck open or closed.
Refrigerant overcharged.
Recover excess refrigerant.
Dirty air filter.
Replace filter.
Low refrigerant charge.
Check for leaks, repair, and recharge.
Metering device or low side restricted.
Remove source of restriction.
Faulty TXV.
1. Check TXV bulb mounting and secure tightly to
suction line.
2. Replace TXV if stuck open or closed.
Insufficient evaporator airflow.
Temperature too low in conditioned area.
Increase air quantity. Check filter and replace if
necessary.
Reset thermostat.
Field-installed filter drier restricted.
Replace.
Page 30
START-UP CHECKLIST
(Remove and Store in Job File)
I. PRELIMINARY INFORMATION
MODEL NO:
DATE:
SERIAL NO:
TECHNICIAN:
II. PRE-START-UP (Insert checkmark in box as each item is completed)
1) ALL PACKING MATERIALS HAVE BEEN REMOVED FROM THE UNIT.
2) VERIFY THAT UNIT INSTALLATION IS LEVEL.
3) CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTION.
4) UNIT GROUNDING WIRE HAS BEEN CONNECTED.
5) POWER WIRES HAVE BEEN SIZED AND INSTALLED PROPERLY TO THE UNIT.
6) CONTROL WIRING CONNECTIONS HAVE BEEN INSTALLED PROPERLY.
(Tear Along This Line)
7) CHECK ALL WIRING TERMINALS HAVE BEEN TIGHTENED PROPERLY.
8) ENERGIZE CRANKCASE HEATERS FOR 12 HOURS.
9) CORRECT FAN ROTATION HAS BEEN CONFIRMED.
10) SEALED ALL POWER AND CONTROL WIRES ENTRY INTO THE UNIT AND INSIDE THE BOX
III. START - UP
ELECTRICAL:
SUPPLY VOLTAGE: (L1 - L2):
(L2 - L3):
(L3 - L1):
COMPRESSOR - 1 AMPS: (L1):
(L2):
(L3):
COMPRESSOR - 2 AMPS: (L1):
(L2):
(L3):
INDOOR FAN AMPS: (L1):
(L2):
(L3):
TEMPERATURES: (BOTH CIRCUITS OPERATING)
OUTDOOR AIR:
: DB
INDOOR SECTION ENTERING AIR:
: DB
:WB
INDOOR SECTION LEAVING AIR:
: DB
:WB
PRESSURES:
CIRCUIT - 1
REFRIGERANT SUCTION
:PSIG REFRIGERANT DISCHARGE
:PSIG
CIRCUIT - 2
REFRIGERANT SUCTION
:PSIG REFRIGERANT DISCHARGE
:PSIG
VERIFY REFRIGERANT CHARGE USING CHARGING CHART IN FIG - 10 to FIG - 13 on Page 24 and 25.
Notes:
Page 31
Manufacturer reserves the rights to discontinue or change at any time, specifications or designs without notice and without incurring any obligations
Supersedes Version: 50TJM-IOM01
Catalog Number: 50TJM-IOM02
Page 32
Effective Date: 24-12-2014
Phase: 60Hz