Carrier GTR040-420 Specifications Page 29
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29
option. Wind baffles and brackets must be field fabricated and
installed for proper operation. The fan speed will modulate
based on liquid line pressure. One control is required per refrig-
erant circuit. See Appendix C for configuration and operational
information.
Pumpout
EXV UNITS — When the lead compressor in each circuit is
started or stopped, that circuit goes through a pumpout cycle to
purge the cooler and refrigerant suction lines of refrigerant. If a
circuit is starting within 15 minutes of the last shutdown, the
pumpout cycle will be skipped.
The pumpout cycle starts immediately upon starting the
lead compressor and keeps the EXV at minimum position for
10 seconds. The EXV is then opened an additional percentage
and compressor superheat control begins. At this point, the
EXV opens gradually to provide a controlled start-up to pre-
vent liquid flood-back to the compressor.
At shutdown, the pumpout cycle continuously closes the
EXV until all lag compressors are off and the EXV is at 0%.
The lead compressor continues to run for an additional 10 sec-
onds and is then shut off.
TXV UNITS — Pumpout is based on timed pumpout. On a
command for start-up, the lead compressor starts. After 15 sec-
onds, the liquid line solenoid opens. At shutdown, the liquid
line solenoid closes when the lead compressor has stopped.
*Control box.
†Fan numbers 11 and 12 do not apply to 30GTN,R and 30GUN,R 130-170 and associated modular units (see Tables 1A and 1B).
Fig. 18 — Condenser Fan Sequence
FAN ARRANGEMENT
FAN
NO.
FAN RELAY NORMAL CONTROL
30GTN,R040-050
30GUN,R040-050
1 — Compressor No. A1
2 — Compressor No. B1
3 1 First Stage of Condenser Fans
4 2 Second Stage of Condenser Fans
30GTN,R060-090, 230B, 245B
30GUN,R060-090, 230B, 245B
1 — Compressor No. A1
2 — Compressor No. B1
3, 4 1 First Stage of Condenser Fans
5, 6 2 Second Stage of Condenser Fans
30GTN,R100,110, 255B-315B
30GUN,R100,110, 255B-315B
1 — Compressor No. A1
2 — Compressor No. B1
3, 4 1 First Stage of Condenser Fans
5, 6, 7, 8 2 Second Stage of Condenser Fans
30GTN,R130 (60 Hz),
30GUN,R130 (60 Hz)
POWER
5, 7 — Compressor No. A1
6, 8 — Compressor No. B1
1, 2 1 First Stage of Condenser Fans
3, 4, 9, 10 2 Second Stage of Condenser Fans
30GTN,R130 (50 Hz), 150-210,
230A-315A, 330A/B-420A/B†
30GUN,R130 (50 Hz), 150-210,
230A-315A, 330A/B-420A/B†
POWER
5, 7 — Compressor No. A1
6, 8 — Compressor No. B1
1, 11 1 First Stage of Condenser Fans, Circuit A
3, 9 2 Second Stage of Condenser Fans, Circuit A
2, 12 3 First Stage of Condenser Fans, Circuit B
4, 10 4 Second Stage of Condenser Fans, Circuit B
3
1
4
2
CONTROL
BOX
53
1
6
4
2
CONTROL
BOX
75 3
1
8
6
4
2
CONTROL
BOX
2
4
6
8
10
9
7
*
5
3
1
2
4
6
8
10
9
7
*
5
3
1
12
11
- Controls Start-Up, Operation 1
- Service, and Troubleshooting 1
- CONTENTS (cont) 2
- INTRODUCTION 2
- Control Module Communication 4
- LEGEND FOR FIG. 1-4 5
- COMMUNICATION 7
- Fig. 5 — Main Base Board 10
- 040-110* 12
- 130-210* 12
- Electronic Expansion Valve 14
- SPT (T10) PART NO. HH51BX006 15
- Fig. 15) — 17
- Capacity Control — 17
- CEPL130351-01 18
- Head Pressure Control 28
- ComfortLink 30
- Adjusting the Contrast — 31
- Table 24 — Operating Modes 46
- Table 28 — 4-20 mA Reset 48
- MAX. ALLOWABLE LOAD (%) 51
- Alarms and Alerts — 53
- Electronic Components 58
- Compressors — 58
- Cooler — 58
- CONNECTION 59
- Condenser Coils 61
- Condenser Fans — 62
- (For Thermistor T10) 67
- Safety Devices — 68
- START-UP AND OPERATION 71
- Actual Start-Up — 71
- Operating Limitations 71
- Operation Sequence — 72
- FIELD WIRING 72
- APPENDIX A — CCN TABLES 75
- OPTIONS (Unit Parameters) 80
- STRTHOUR 81
- CURRMODS 82
- SETPOINT 82
- LOADFACT 82
- VERSIONS 82
- SUPERVISOR MAINTENANCE TABLE 83
- OCCUPANCY SUPERVISORY 83
- ENGLISH AND SI 84
- Configuration — 92
- Drive Programming — 93
- Troubleshooting — 93
- EPM Chip — 95
- Loss of CCN Communications — 95
- SERVICE TRAINING 96
- (Remove and use for job file) 97
- I. Project Information 97
- III. Unit Start-Up 99
- Record Software Versions 100
- Component Test — 102
- Operating Data: 103
- Ta b 5 c 104
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