30GTN015-035
Reciprocating Liquid Chillers
with ComfortLink™ Controls
50/60 Hz
Installation Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
Step 1 — Rig and Place the Unit. . . . . . . . . . . . . . . . . . 1
• RIGGING
• PLACING UNIT
• MOUNTING UNIT
Step 2 — Check Compressor Mounting . . . . . . . . . . 3
Step 3 — Cooler Fluid and Drain Piping
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
• PREPARATION FOR YEAR-ROUND
OPERATION
• PREPARATION FOR WINTER SHUTDOWN
Step 4 — Make Electrical Connections . . . . . . . . . . . 7
• POWER SUPPLY
Fig. 1 — Model 30GTN (020 Shown)
• POWER WIRING
Step 5 — Install Accessories. . . . . . . . . . . . . . . . . . . . 11
• ELECTRICAL
INSTALLATION
Step 1 — Rig and Place the Unit
• HOT GAS BYPASS
Step 6 — Refrigerant Circuit. . . . . . . . . . . . . . . . . . . . . 11
RIGGING — Preferred method is with spreader bars from
above the unit. Use 2-in. (50 mm) OD pipe or hooks in lifting
holes. Rig with 4 cables and spreader bars. All panels must be
in place when rigging. See rigging label on unit for details con-
cerning shipping weights, distance between lifting holes, center
of gravity, and spreader bar dimensions. See Fig. 2.
• LEAK TESTING
• DEHYDRATION
• REFRIGERANT CHARGE
SAFETY CONSIDERATIONS
If overhead rigging is not possible, place chiller on skid or
pad for rolling or dragging. When rolling, use a minimum of
3 rollers. When dragging, pull the pad. Do not apply force to
the unit. When in final position, raise from above to lift unit off
pad.
Installing, starting up, and servicing air-conditioning equip-
ment can be hazardous due to system pressures, electrical com-
ponents, and equipment location (roofs, elevated structures,
etc).
Only trained, qualified installers and service mechanics
should install, start up, and service this equipment (Fig. 1).
Untrained personnel can perform basic maintenance func-
tions such as cleaning coils. All other operations should be per-
formed by trained service personnel.
When working on the equipment, observe precautions in the
literature and on tags, stickers, and labels attached to the
equipment.
All panels must be in place when rigging.
PLACING UNIT — There must be at least 4 ft (1.2 m) for
service and for unrestricted airflow on all sides of unit, and a
minimum of 8 ft (2.4 m) clear air space above unit. Provide
ample room for servicing cooler. For cooler removal see clear-
ance requirements in Fig. 3-5. For multiple units, allow 8 ft
(2.4 m) separation between units for airflow and service.
If unit is to be used in an area with high solar radiation,
mounted position should be such that control box is not ex-
posed to direct solar radiation. Exposure to direct solar radia-
tion could affect the temperature switch controlling cooler
heaters. See Table 2.
•
•
•
Follow all safety codes.
Wear safety glasses and work gloves.
Keep quenching cloth and fire extinguisher nearby when
brazing.
•
•
Use care in handling, rigging, and setting bulky
equipment.
See Tables 1A and 1B for Physical Data.
ELECTRIC SHOCK HAZARD
Open all remote disconnects before servicing
this equipment.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 903 Catalog No. 563-068 Printed in U.S.A. Form 30GTN-10SI Pg 1 1-00 Replaces: New
Book 2
Tab 5c
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are field supplied. Be sure unit is level to ensure proper oil
return to compressor.
Step 2 — Check Compressor Mounting — As
shipped, compressor is held down by 4 bolts. After unit is in-
stalled, loosen each bolt using nut indicated in Fig. 6 until the
flat washer (3/8 in.) can be moved with finger pressure.
Step 3 — Cooler Fluid and Drain Piping Con-
nections — When facing the cooler side of the unit, the re-
turn water connection is on the left and the leaving water con-
nection is on the right. See Fig. 3-5 and 7. Install a minimum
40-mesh strainer in the cooler fluid inlet line just ahead of and
as close as possible to the cooler. Provide a means of venting
air from the high point of the field-installed piping.
After field piping is complete, freeze-up protection is rec-
ommended using inhibited ethylene glycol or other suitable in-
hibited antifreeze solution and electric heat tapes in area where
piping is exposed to low ambient temperatures (34 F [1 C] or
below). Heat tapes should possess a rating for area ambients
and be covered with a suitable thickness of closed-cell
insulation. Route power for heating tapes from a separately-
fused disconnect. Identify disconnect as heat tape power source
with a warning that power must not be turned off except when
unit is being serviced.
The cooler drain connection is at the opposite end from the
compressor (See Fig. 3-5). Insulate the drain piping (in the
same manner as the chilled water piping) for at least one ft
(305 mm) from cooler.
LIFTING
HOLES
“A”
CENTER OF GRAVITY
“B” “C”
mm in. mm in. mm in. mm
MAXIMUM
SHIP WT
“D”
UNIT
30GTN
Lb
Kg
in.
015
020
025
030
035
1876 851
2031 921
2415 1095
2606 1182
94.0 2388 48.0 1219 23.0 583 49.5 1256
94.0 2388 47.5 1207 23.0 583 49.5 1256
94.0 2388 51.0 1295 34.5 876 73.5 1867
94.0 2388 51.0 1295 34.5 876 73.5 1867
3365 1526 127.0 3225 66.5 1689 35.5 901 73.5 1867
Fig. 2 — Rigging with Spreader Bars
(Field Supplied)
PREPARATION FOR YEAR-ROUND OPERATION — If
unit is on year-round operation, add sufficient inhibited ethyl-
ene glycol or other suitable inhibited antifreeze solution to
chilled water to prevent freezing under low-ambient operating
conditions. Consult local water authority on characteristics of
area water and add a recommended inhibitor to the chilled
water.
PREPARATION FOR WINTER SHUTDOWN — Do not
shut off control power disconnect during off-season shutdown.
At end of cooling season:
Table 2 — Temperature Limits for Standard Units
TEMPERATURE
Maximum Ambient Temperature
Minimum Ambient Temperature
Maximum Cooler EWT*
Maximum Cooler LWT
Minimum cooler LWT†
F
125
0
C
52
–18
35
95
70
38
21
3.3
1. Drain water from system.
LEGEND
2. Replace drain plug and put 2 gallons (8 liters) of inhib-
ited ethylene glycol (or other suitable inhibited anti-
freeze) in cooler to prevent freezing of residual water.
(Remove plug on top of leaving chilled water nozzle to
add liquid.)
EWT
LWT
—
—
Entering Fluid (Water) Temperature
Leaving Fluid (Water) Temperature
*For sustained operation, EWT should not exceed 85 F (29.4 C).
†Unit requires modification below this temperature.
MOUNTING UNIT — When unit is in proper location, use
of mounting holes in base rails is recommended for securing
unit to supporting structure, or for mounting unit on vibration
isolators if required. See Fig. 3-5. Fasteners for mounting unit
3. At the beginning of the next cooling season, refill cooler
and add recommended inhibitor.
3
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NOTES:
1. There must be minimum 8 ft (2.4 m) clear air space above unit.
2. Dimensions in [ ] are in millimeters.
3. The approximate operating weight of the unit is:
50 Hz
60 Hz
Lb
UNIT
Lb
Kg
790
831
846
902
UNIT
Kg
744
786
826
882
30GTN015
30GTN015C
30GTN020
30GTN020C
1741
1833
1864
1988
30GTN015
30GTN015C
30GTN020
30GTN020C
1640
1732
1821
1945
LEGEND
UNIT
A
C
—
—
—
—
—
Copper Coils
Compressor
Mounting
National Electrical Code (U.S.A.)
Variable-Air Volume
COMPR
MTG
NEC
VAV
(1219)
30GTN015
4′-0″
(1207)
3′-111/2″
30GTN020
Fig. 3 — Dimensional Drawing, 30GTN015,020
4
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NOTES:
1. There must be minimum 8 ft (2.4 m) clear air space above unit.
2. Dimensions in [ ] are in millimeters.
3. The approximate operating weight of the unit is:
60 Hz
Lb
50 Hz
Lb
UNIT
Kg
UNIT
Kg
30GTN025
30GTN025C
30GTN030
30GTN030C
2170
2324
2268
2474
984
30GTN025
30GTN025C
30GTN030
30GTN030C
2193
2347
2332
2538
995
1054
1029
1122
1065
1058
1151
LEGEND
C
—
—
—
—
—
Copper Coils
Compressor
Mounting
National Electrical Code (U.S.A.)
Variable-Air Volume
COMPR
MTG
NEC
VAV
Fig. 4 — Dimensional Drawing, 30GTN025,030
5
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NOTES:
1. There must be minimum 8 ft (2.4 m) clear air space above unit.
2. Dimensions in [ ] are in millimeters.
3. The approximate operating weight of the unit is:
60 Hz
UNIT
Lb
Kg
30GTN035
30GTN035C
2965
3273
1345
1485
LEGEND
C
—
—
—
—
Copper Coils
Compressor
Mounting
COMPR
MTG
NEC
National Electrical Code (U.S.A.)
Fig. 5 — Dimensional Drawing, 30GTN035
6
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NOTE: All dimensions are in inches.
Fig. 6 — Compressor Mounting
power to the Main Base Board (MBB) is off. They are
protected by a 7-amp fuse in field-supplied control power
supply disconnect.
3. The control circuit field-supplied disconnect should never
be off except when unit is being serviced or is to be down
for a prolonged period, in which case cooler should be
drained. When operation is resumed, crankcase heater
should be energized for 24 hours before start-up.
Liquid Chiller
REFRIGERATING
MACHINE
U.N.2857
OUT
IN
4. Power entry is at one end only.
5. Maximum field wire sizes allowed by lugs on terminal
block are:
350 kcmil for 30GTN030,035 (208/230-3-60) and
30GTN030 (230-3-50) units.
WATER OUTLET
(LEAVING WATER)
WATER INLET
(RETURN WATER)
WATER
DRAIN
2/0 AWG for all other units.
Fig. 7 — Water Connection Locations
6. Terminals for field power supply are suitable for copper,
copper-clad aluminum, or aluminum conductors. Insula-
tion must be rated 167 F (75 C) minimum.
Step 4 — Make Electrical Connections
POWER SUPPLY — Electrical characteristics of available
power supply must agree with unit nameplate rating. Supply
voltage must be within limits shown in Tables 3A and 3B.
Field Connections
Main Power — Bring wires from the fused disconnect switch
through hole in bottom rail of unit to control box (Fig. 3-5) and
connect to terminals on terminal block TB1 (See Fig. 8).
Control Power — Bring separate source power (see Fig. 8,
note 2) into unit as shown in Fig. 3-5. This supplies power for
control circuit, compressor crankcase heater, and cooler heater.
IMPORTANT: Operating unit on improper supply volt-
age or with excessive phase imbalance constitutes abuse
and may affect Carrier warranty.
POWER WIRING — All power wiring must comply with ap-
plicable local and national codes. Install field-supplied branch
circuit fused disconnect(s) per NEC (National Electrical Code,
U.S.A.) of a type that can be locked OFF or ON. Disconnect(s)
must be within sight from and readily accessible from unit in
compliance with NEC Article 440-14.
Connect incoming wires to TB4 in unit control box (L1 to
and L2 to
). Neutral side must be connected to the neutral
terminal block (by C-A1) for 380-3-60 and 400-3-50 V units
only. In the auxiliary power supply a field-supplied disconnect
with 15-amp circuit protection must be provided to accommo-
date crankcase heater and cooler heater cable.
To comply with NEC Article 440-14, the disconnect must
be located within sight from and readily accessible from unit.
General Wiring Notes
1. The control circuit power must be from a separate source
and must be brought through a field-supplied fused dis-
connect rated at 15 amps for 230-v and 30 amps for 115-v
control power. Two terminal blocks are provided for
field-wired control devices.
IMPORTANT: To ensure power to the heaters, make
sure auxiliary power to unit is always on (except for
servicing or prolonged shutdown).
2. Crankcase and cooler heaters are wired in the control cir-
cuit so they are always operable as long as the control
power disconnect is on and safety device is open or the
Enable-Off-Remote contact switch is in the Off position.
Heaters are wired so that they are energized even when
A toggle switch (marked Emergency On-Off on the unit
label diagram and by the switch) allows the control circuit to be
manually disconnected when necessary. This switch does not
affect the crankcase heater and cooler heater cable.
7
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Table 3A — Electrical Data — Standard Unit
UNIT
CONTROL CIRCUIT
Supplied
UNIT
SIZE
30GTN
Supplied*
Min
Voltage
V-Hz (3 Ph)
Rec Fuse
Size
V-Hz
(Single Ph)
MCA and
MOCP
MCA
MOCP
ICF
Max
253
506
633
342
440
253
506
633
342
440
253
506
633
342
440
253
506
633
342
440
253
506
633
342
Min
104
104
104
198
198
104
104
104
198
198
104
104
104
198
198
104
104
104
198
198
104
104
104
198
Max
127
127
127
254
254
127
127
127
254
254
127
127
127
254
254
127
127
127
254
254
127
127
127
254
208/230-60
460-60
575-60
187
414
518
418
342
187
414
518
418
342
187
414
518
418
342
187
414
518
418
342
187
414
518
418
82.2
38.3
31.7
43.9
49.4
97.4
49.6
42.9
51.1
60.5
124.7
60.7
52.4
64.7
68.5
145.5
68.7
54.9
73.6
87.8
203.0
91.1
81.6
111.1
125
60
50
70
80
150
80
70
278.4
126.2
102.8
152.8
179.0
357.4
179.2
126.8
198.8
229.0
458.4
229.2
170.8
254.8
259.0
518.4
259.2
182.8
287.8
351.0
708.6
354.3
286.2
393.7
100
45
40
60
60
125
60
60
60
80
150
80
70
80
90
175
90
70
115-60
115-60
115-60
230-60
230-50
115-60
115-60
115-60
230-60
230-50
115-60
115-60
115-60
230-60
230-50
115-60
115-60
115-60
230-60
230-50
115-60
115-60
115-60
230-60
30
30
30
15
15
30
30
30
15
15
30
30
30
15
15
30
30
30
15
15
30
30
30
15
015
020
025
380-60
380/415-50
208/230-60
460-60
575-60
380-60
380/415-50
208/230-60
460-60
575-60
380-60
380/415-50
208/230-60
460-60
575-60
380-60
380/415-50
208/230-60
460-60
575-60
380-60
80
100
200
100
80
110
110
250
110
90
125
150
350
150
125
175
030
035
90
110
250
110
100
150
See Legend and Notes on page 9.
8
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Table 3B — Electrical Data — Unit with Factory-Installed Motormaster® I Control
UNIT
MCA
CONTROL CIRCUIT
Supplied
UNIT
SIZE
Supplied*
Min
Voltage
Rec Fuse
Size
V-Hz
MCA and
MOCP
MOCP
ICF
30GTN
V-Hz (3 Ph)
(Single Ph)
Max
253
506
633
342
440
253
506
633
342
440
253
506
633
342
440
253
506
633
342
440
253
506
633
342
Min
104
104
104
198
198
104
104
104
198
198
104
104
104
198
198
104
104
104
198
198
104
104
104
198
Max
127
127
127
254
254
127
127
127
254
254
127
127
127
254
254
127
127
127
254
254
127
127
127
254
208/230-60
460-60
575-60
187
414
518
418
342
187
414
518
418
342
187
414
518
418
342
187
414
518
418
342
187
414
518
418
82.2
38.3
30.8
43.9
51.9
97.4
49.6
42.0
51.1
63.0
124.7
60.7
51.5
64.7
71.0
145.5
68.7
54.0
73.6
90.3
203.0
91.1
80.7
111.1
125
60
50
70
80
150
80
70
278.4
129.3
105.6
152.8
181.5
357.4
182.3
129.6
198.8
231.5
458.4
232.3
173.6
254.8
261.5
518.4
262.3
185.6
287.8
353.5
708.6
357.4
289.0
393.7
100
45
40
60
70
125
60
50
60
80
150
80
70
80
90
175
90
70
115-60
115-60
115-60
230-60
230-50
115-60
115-60
115-60
230-60
230-50
115-60
115-60
115-60
230-60
230-50
115-60
115-60
115-60
230-60
230-50
115-60
115-60
115-60
230-60
30
30
30
15
15
30
30
30
15
15
30
30
30
15
15
30
30
30
15
15
30
30
30
15
015
020
025
380-60
380/415-50
208/230-60
460-60
575-60
380-60
380/415-50
208/230-60
460-60
575-60
380-60
380/415-50
208/230-60
460-60
575-60
380-60
380/415-50
208/230-60
460-60
575-60
380-60
80
100
200
100
80
110
110
250
110
90
125
150
350
150
125
175
030
035
90
110
250
110
100
150
LEGEND
Determine maximum deviation from average voltage:
ICF
— Maximum Instantaneous Current Flow during starting
(the point in the starting sequence where the sum of
the LRA for the starting compressor, plus the total
RLA for all running compressors, plus the total FLA for
all running fan motors is maximum).
(AB) 243 – 239 = 4 v
(BC) 239 – 236 = 3 v
(AC) 239 – 238 = 1 v
Maximum deviation is 4 v. Determine percent voltage imbalance:
4
% Voltage Imbalance = 100 x
239
MCA — Minimum Circuit Amps (complies with National Elec-
trical Code [NEC, U.S.A.], Section 430-24)
MOCP — Maximum Overcurrent Protection
= 1.7%
*Units are suitable for use on electrical systems where voltage sup-
plied to unit terminals is not below or above listed minimum and
maximum limits.
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
NOTE: Never operate a motor where a phase imbalance in supply
voltage is greater than 2%. Use the following formula to determine
the percent voltage imbalance.
IMPORTANT: Contact your local electric utility company
immediately if the supply voltage phase imbalance is more
than 2%.
Percent Voltage Imbalance
max voltage deviation from average voltage
= 100 x
average voltage
Example: Supply voltage is 240-3-60.
AB = 243 v
BC = 236 v
AC = 238 v
243 + 236 + 238
Average voltage =
3
=
239 v
9
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TB4
REMOTE
ON-OFF
LEGEND
NOTES:
1. Factory wiring is in accordance with the National Electrical Code. Any field mod-
ifications or additions must be in compliance with all applicable codes.
2. Connect separate source of control power from field supplied fused disconnect
to terminal 1 of TB4. Neutral side must be connected to terminal 2. This provides
power for the unit control circuit, cooler heater and compressor crankcase
heater.
C
—
—
—
—
—
—
—
—
—
—
—
Compressor Contactor
Circuit Breaker
Carrier Comfort Network
Chilled Water Flow Switch
Chilled Water Pump
Chilled Water Pump Interlock
Fan Contactor
CB
CCN
CWFS
CWP
CWPI
FC
GCS
LEN
MBB
NEC
3. All field interlock contacts must have minimum rating of 360 va pilot duty plus
capacity required for field-installed equipment.
4. For internal unit wiring reference wiring book or unit wiring label diagram.
5. For GCS accessory, remove jumper wire between terminals 5 and 8 on terminal
block TB2.
6. For part wind start accessory, remove gray jumper wire between C-A1-C1 and
C-A1A-C1. Time delay relay shown in suggested mounting position.
7. Voltage requirements:
Ground Current Sensor
Local Equipment Network
Main Base Board
National Electrical Code
(U.S.A. Standard)
TB
TDR
TRAN
—
—
—
Terminal Block
Time Delay Relay
Transformer
MAIN POWER
208/230-3-60
460-3-60
CONTROL POWER
115-1-60
Field Power Wiring
Field Control Power Wiring
Field Control Wiring
115-1-60
575-3-60
380-3-60
115-1-60
Factory-Installed Wiring
Field-Installed Device
220-1-60
380/415-3-50
230-1-50
Fig. 8 — Field Wiring Schematic
10
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HOT GAS BYPASS — Hot gas bypass usually is not rec-
ommended because it results in application of equipment out
of its normal design application range. However, if its use is
required, the appropriate hot gas bypass package may be used.
For installation details, refer to separate instructions supplied
with the accessory package.
Step 5 — Install Accessories
ELECTRICAL — A number of electrical accessories are
available to provide the following optional features (for details,
refer to the Controls, Start-Up, Operation, Service, and
Troubleshooting book):
•
Energy Management Module (used for any of the fol-
lowing types of temperature reset, demand limit and ice
features):
Step 6 — Refrigerant Circuit
LEAK TESTING — Units are shipped with complete op-
erating charge of R-22 (see Tables 1A-1B) and should be
under sufficient pressure to conduct a leak test. If there is no
pressure in the system, use standard refrigeration practices to
search for the leak. Repair the leak using good refrigeration
practices. After leaks are repaired, system must be evacuated
and dehydrated prior to recharging with refrigerant.
DEHYDRATION — Refer to Carrier Standard Service Tech-
niques Manual, Chapter 1, Refrigerants, Sections 6 and 7 for
details. Do not use compressor to evacuate system.
— 4 to 20 mA leaving fluid temperature reset (requires
field-supplied 4 to 20 mA generator)
— 4 to 20 mA cooling set point reset (requires field-
supplied 4 to 20 mA generator)
— Discrete inputs for 2-step demand limit (requires field-
supplied dry contacts)
— 4 to 20 mA demand limit (requires field-supplied 4 to
20 mA generator)
— Discrete input for Ice Done switch (requires field-
supplied dry contacts)
REFRIGERANT CHARGE (Refer to Table 1A or 1B) —
Immediately ahead of filter drier in each circuit is a factory-
1
•
•
Chilled fluid flow switch/interlock
Navigator display:
installed liquid line service valve. Each valve has a /4-in.
Schrader connection for charging liquid refrigerant.
Provides hand-held, mobile capability using easy to read
4-line display. Keypad function is the same as the Scrolling
Marquee module. Features magnet for ‘hands free’ service
of components.
11
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Copyright 2000 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 903 Catalog No. 563-068 Printed in U.S.A. Form 30GTN-10SI Pg 12 1201 1-00 Replaces: New
Book 2
Tab 5c
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