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SAE 2, A307 GR A HEX HEAD
NO MARKS
BOLT SIZE
LOW CARBON STEEL
(in.)
Minimum
1/4
4
5/16
8
3/8
13
7/16
21
1/2
32
9/16
46
5/8
65
3/4
105
7/8
140
1
210
1-1/8
330
1-1/4
460
1-3/8
620
1-1/2
740
1-5/8
1010
1-3/4
1320
1-7/8
1630
2
1900
2-1/4
2180
2-1/2
3070
2-3/4
5120
3
6620
BOLT SIZE
(Metric)
M4
M6
M8
M10
M12
M16
M20
M24
M27
TUBE SIZE (IN.)
1/4
3/8
1/2
5/8
Check Chiller Tightness
Figure 14 outlines the proper sequence and procedures for leak
testing.
The 19MV chillers are shipped with a full refrigerant charge.
Units may be ordered with refrigerant shipped separately, along
with 15 psig (103 kPa) nitrogen holding charge in each vessel.
To determine if there are any leaks, the unit should be charged
with refrigerant. Use an electronic leak detector to check all
Table 3 — Bolt Torque Requirements, Foot Pounds
SAE 5, SOCKET HEAD OR HEX
WITH 3 RADIAL LINES, OR SA499
MEDIUM CARBON STEEL
Maximum
Minimum
6
11
19
30
45
65
95
150
200
300
475
660
885
1,020
1060
1,220
1450
1,670
1890
2,180
2340
2,930
2720
3,150
3120
4,550
4380
5,000
7320
8,460
9460
11,040
Table 4 — Bolt Torque Requirements, Foot Pounds (Metric Bolts)
CLASS 8.8
Minimum
1.75
6
14
28
48
118
230
400
580
Table 5 — O-ring Face Seal Torque Requirements
ORS WRENCH
11/16
13/16
15/16
1-1/8
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
1,460
1,750
2,390
3,110
4,190
4,500
6,500
7,140
12,090
15,770
Maximum
2.5
9
20
40
70
170
330
570
830
MINIMUM N•m (ft-lb)
15.9 (11.7)
26.4 (19.5)
35.3 (26.0)
52.9 (39.0)
flanges and solder joints after the chiller is pressurized. If any
leaks are detected, follow the leak test procedure (page 18).
If the chiller is spring isolated, keep all springs blocked in both di-
rections 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 transferred. Adjust the
springs when the refrigerant is in operating condition and the wa-
ter circuits are full.
15
SAE 8, HEX HEAD
WITH 6 RADIAL LINES OR SA354 GR BD
MEDIUM CARBON STEEL
Minimum
9
20
32
53
80
115
160
260
415
625
985
1,380
1,840
2,200
3,020
3,930
5,280
5,670
8,200
11,350
15,710
19,900
CLASS 10.9
Minimum
Maximum
2.5
8
20
40
70
170
330
570
820
MAXIMUM N•m (ft-lb)
17.4 (12.8)
29.0 (21.4)
38.8 (28.6)
58.2 (42.9)
Maximum
13
28
46
75
115
165
225
370
590
893
1,410
1,960
2,630
3,150
4,310
5,610
7,550
8,100
11,710
16,210
22,440
28,440
3.5
12
30
57
100
240
470
810
1175
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Troubleshooting
