Carrier 19XR Spécifications Page 64
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- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
64
3. Open valve 4 on the pumpout unit and open valves 1a and
1b on the chiller cooler and condenser, Fig. 29 and 30.
Slowly open valve 2 on the pumpout unit to equalize the
pressure. This process takes approximately 15 minutes.
4. Once the pressures have equalized, the discharge isola-
tion valve, cooler isolation valve, optional hot gas bypass
isolation valve, and the refrigerant isolation valve can be
opened. Close valves 1a and 1b, and all pumpout unit
valves.
The full refrigerant charge on the 19XR will vary with chill-
er components and design conditions, as indicated on the job
data specifications. An approximate charge may be determined
by adding the condenser charge to the cooler charge as listed in
Table 10.
Use the CONTROL TEST terminate lockout function to
monitor conditions and start the pumps.
Table 10 — Refrigerant (HFC-134a) Charge
If the chiller has been shipped with a holding charge
, the
refrigerant is added through the pumpout charging connection
(Fig. 29 and 30, valve 1b). First evacuate the nitrogen holding
charge from the chiller vessels. Charge the refrigerant as a gas
until the system pressure exceeds 35 psig (141 kPa) for
HFC-134a. After the chiller is beyond this pressure the refrig-
erant should be charged as a liquid until all the recommended
refrigerant charge has been added. The charging valve (Fig. 29
and 30, valve 7) can be used to charge liquid to the cooler if the
cooler isolation valve (11) is present and is closed. Do not
charge liquid through the linear float to the condenser.
TRIMMING REFRIGERANT CHARGE — The 19XR is
shipped with the correct charge for the design duty of the chill-
er. Trimming the charge can best be accomplished when the
design load is available. To trim the charge, check the tempera-
ture difference between the leaving chilled water temperature
and cooler refrigerant temperature at full load design condi-
tions. If necessary, add or remove refrigerant to bring the
temperature difference to design conditions or minimum
differential.
Table 10 lists the 19XR chiller refrigerant charges for each
cooler and condenser code. Total refrigerant charge is the sum
of the cooler and condenser charge.
INITIAL START-UP
Preparation —
Before starting the chiller, verify:
1. Power is on to the main starter, oil pump relay, tower fan
starter, oil heater relay, and the chiller control panel.
2. Cooling tower water is at proper level and at-or-below
design entering temperature.
3. Chiller is charged with refrigerant and all refrigerant and
oil valves are in their proper operating positions.
4. Oil is at the proper level in the reservoir sight glasses.
5. Oil reservoir temperature is above 140 F (60 C) or above
refrigerant temperature plus 50
°
F (28
°
C).
6. Valves in the evaporator and condenser water circuits are
open.
NOTE: If the pumps are not automatic, ensure water is
circulating properly.
7. Access the CONTROL TEST screen. Scroll down on the
TERMINATE LOCKOUT option. Press the SELECT (to
enable the chiller to start) and answer YES to reset unit to
operating mode. The chiller is locked out at the factory in
order to prevent accidental start-up.
Dry Run to Test Start-Up Sequence
For electro-mechanical starters.
1. Disengage the main motor disconnect (CB1) on the start-
er front panel. This should only disconnect the motor
power. Power to the controls, oil pump, and starter con-
trol circuit should still be energized.
2. Observe the default screen on the CVC: the status mes-
sage in the upper left-hand corner reads, “Manually
Stopped,” Press the or softkey to start.
If the chiller controls do not go into a start mode (“Unoc-
cupied Mode” is displayed) go to the SCHEDULE screen
and override the schedule or change the occupied
time. Press the softkey to begin the start-up
sequences.
Whenever turning the discharge isolation valve, be sure to
reattach the valve locking device. This prevents the valve
from opening or closing during service work or during
chiller operation.
Always operate the condenser and chilled water pumps
whenever charging, transferring, or removing refrigerant
from the chiller.
COOLER
CODE
REFRIGERANT
CHARGE
CONDENSER
CODE
REFRIGERANT
CHARGE
lb kg lb kg
10
290 132
10
200 91
11
310 141
11
200 91
12
330 150
12
200 91
15
320 145
15
250 113
16
340 154
16
250 113
17
370 168
17
250 113
20
345 157
20
225 102
21
385 175
21
225 102
22
435 197
22
225 102
30
350 159
30
260 118
31
420 190
31
260 118
32
490 222
32
260 118
35
400 181
35
310 141
36
480 218
36
310 141
37
550 250
37
310 141
40
560 254
40
280 127
41
630 286
41
280 127
42
690 313
42
280 127
45
640 290
45
330 150
46
720 327
46
330 150
47
790 358
47
330 150
50
750 340
50
400 181
51
840 381
51
400 181
52
900 408
52
400 181
55
870 395
55
490 222
56
940 426
56
490 222
57
980 445
57
490 222
60
940 426
60
420 190
61
980 445
61
420 190
62
1020 463
62
420 190
65
1020 463
65
510 231
66
1060 481
66
510 231
67
1090 494
67
510 231
70
1220 553
70
780 354
71
1340 608
71
780 354
72
1440 653
72
780 354
75
1365 619
75
925 420
76
1505 683
76
925 420
77
1625 737
77
925 420
80
1500 680
80
720 327
81
1620 735
81
720 327
82
1730 785
82
720 327
85
1690 766
85
860 390
86
1820 825
86
860 390
87
1940 880
87
860 390
Do not permit water or brine that is warmer than 110 F
(43 C) to flow through the cooler or condenser. Refrigerant
overpressure may discharge through the relief valves and
result in the loss of refrigerant charge.
CCN LOCAL
LOCAL
- 19XR,XRV 1
- 50/60 Hz 1
- CONTENTS 2
- CONTENTS (cont) 3
- INTRODUCTION 4
- REAR VIEW 6
- FRONT VIEW 6
- VFD COOLING CYCLE 8
- LUBRICATION CYCLE 8
- Summary — 8
- Details — 8
- Oil Reclaim System — 8
- STARTING EQUIPMENT 9
- CONTROLS 10
- Definitions 10
- General — 11
- PIC II System Components — 11
- TOP VIEW 12
- COMPRESSOR DETAIL 12
- Fig. 12 — Control Panel 14
- Fig. 13 — Power Panel 14
- 55.1 44.1 40.7 15
- 85.0 95.0 98.1 15
- 21.8 132.9 93 15
- Table 2 — CVC Display Data 22
- PIC II System Functions 33
- Safety Controls — 34
- Shunt Trip (Option) — 35
- Default Screen Freeze — 35
- Refrigerant Leak Detector — 37
- Kilowatt Output — 37
- Remote Reset of Alarms — 37
- Condenser Pump Control — 37
- Water/Brine Reset — 38
- Chiller) — 39
- Lead/Lag Control — 41
- Ice Build Control — 43
- Service Operation — 45
- START-UP/SHUTDOWN/ 46
- RECYCLE SEQUENCE (Fig. 26) 46
- Local Start-Up — 46
- Shutdown Sequence — 47
- Chilled Water Recycle Mode — 47
- Safety Shutdown — 47
- Leak Test Chiller — 50
- Standing Vacuum Test — 50
- Temperature (F) 52
- Temperature (C) 52
- Check Starter 54
- RediStart MICRO 57
- Perform a Control Test — 62
- High Altitude Locations — 63
- INITIAL START-UP 64
- Preparation — 64
- Check Motor Rotation 65
- Fig. 34 — Refrigeration Log 68
- Water Treatment — 75
- Check Pressure Transducers — 75
- TROUBLESHOOTING GUIDE 76
- Overview — 76
- Checking Display Messages — 76
- Control Test — 77
- LEGEND TO TABLES 11A-11J 77
- A. MANUAL STOP 78
- B. READY TO START 78
- C. IN RECYCLE SHUTDOWN 78
- E. START-UP IN PROGRESS 79
- F. NORMAL RUN 79
- G. NORMAL RUN WITH OVERRIDES 80
- H. OUT-OF-RANGE SENSOR ALARMS 80
- J. CHILLER ALERTS 83
- J. CHILLER ALERTS (cont) 84
- Control Modules 87
- Notes on Module Operation 87
- Solid-State Starters — 88
- INTEGRATED STARTER MODULE 89
- Physical Data — 90
- Table 15 — Compressor Weights 93
- Electrical Data 97
- Table 20 — Motor Voltage Code 97
- Compressor Assembly Torques 98
- VIEW B — HIGH SPEED SHAFT 99
- 19XR COMPRESSOR CLEARANCES 99
- "ON" 107
- "OFF" 107
- INDEX (cont) 119
- INITIAL START-UP CHECKLIST 123
- CCN LOCAL RESET MENU 135
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