Check Chiller Tightness; Refrigerant Tracer - Carrier 19XRV Start-Up, Operation And Maintenance Instructions Manual

BOLT SIZE
(in.)
LOW CARBON STEEL
Minimum
1
/
4
5
/
16
3
/
8
7
/
16
1
/
2
9
/
16
5
/
8
3
/ 105
4
7
/ 140
8
1 210
1
1 / 330
8
1 1 / 460
4
3
1 / 620
8
1
1 / 740
2
1 5 / 1010
8
1 3 / 1320
4
1 7 / 1630
8
2 1900
2 1 / 2180
4
2 1 / 3070
2
2 3 / 5120
4
3 6620
Check Chiller Tightness —
proper sequence and procedures for leak testing.
The 19XRV chillers are shipped with the refrigerant
contained in the condenser shell and the oil charge in the
compressor. The cooler is shipped with a 15 psig (103 kPa)
refrigerant charge. Units may be ordered with the refrigerant
shipped separately, along with a 15 psig (103 kPa) nitrogen-
holding charge in each vessel.
To determine if there are any leaks, the chiller should be
charged with refrigerant. Use an electronic leak detector to
check all flanges and solder joints after the chiller is pressur-
ized. If any leaks are detected, follow the leak test procedure.
If the chiller is spring isolated, keep all springs blocked in
both directions to prevent possible piping stress and damage
during the transfer of refrigerant from vessel to vessel during
the leak test process, or any time refrigerant is being
Table 10 — Bolt Torque Requirements, Foot Pounds
SAE 2, A307 GR A
HEX HEAD
NO MARKS
Maximum
4 6
8 11
13 19
21 30
32 45
46 65
65 95
150
200
300
475
660
885
1060
1450
1890
2340
2720
3120
4380
7320
9460
Figure 29 outlines the
SAE 5, SA449
SOCKET HEAD OR HEX
WITH 3 RADIAL LINES
MEDIUM CARBON STEEL
Minimum Maximum
6 9
13 18
22 31
35 50
53 75
75 110
105 150
175 250
265 380
410 580
545 780
770 1,100
1,020 1,460
1,220 1,750
1,670 2,390
2,180 3,110
2,930 4,190
3,150 4,500
4,550 6,500
5,000 7,140
8,460 12,090
11,040 15,770
transferred. Adjust the springs when the refrigerant is in operat-
ing condition and the water circuits are full.
Refrigerant Tracer —
environmentally acceptable refrigerant tracer for leak testing
with an electronic detector or halide torch.
Ultrasonic leak detectors can also be used if the chiller is
under pressure.
Do not use air or oxygen as a means of pressurizing
the chiller. Mixtures of HFC-134a and air can undergo
combustion.
56
SAE 8, SA354 GR BD
HEX HEAD
WITH 6 RADIAL LINES
MEDIUM CARBON STEEL
Minimum Maximum
9 13
20 28
32 46
53 75
80 115
115 165
160 225
260 370
415 590
625 893
985 1,410
1,380 1,960
1,840 2,630
2,200 3,150
3,020 4,310
3,930 5,610
5,280 7,550
5,670 8,100
8,200 11,710
11,350 16,210
15,710 22,440
19,900 28,440
Carrier recommends the use of an