Tighten All Gasketed Joints; Check Chiller Tightness - Carrier AquaEdge 19XR Start-Up, Operation And Maintenance Instructions Manual

Tighten All Gasketed Joints

Gaskets normally relax by the time the chiller arrives at the
jobsite. Tighten all gasketed joints to ensure a leak-tight chiller
(does not apply to refrigerant joints covered by factory insula-
tion). Gasketed joints (excluding O-rings) may include joints at
some or all of the following:
• waterbox covers
• compressor suction elbow flanges (at compressor and at
the cooler)
• compressor discharge flange
• compressor discharge line spacer (both sides) if no isola-
tion valve
• cooler inlet line spacer (both sides) if no isolation valve
• hot gas bypass valve (both sides of valve)
• hot gas bypass flange at compressor
See Tables 3 and 4 for bolt torque requirements.
BOLT SIZE
(in.)
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
1 /
3 620
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
BOLT SIZE
(METRIC)
M4
M6
M8
M10
M12
M16
M20
M24
M27
Table 3 — Bolt Torque Requirements, Foot Pounds
SAE 2, A307 GR A
HEX HEAD
NO MARKS
LOW CARBON STEEL
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
Table 4 — Bolt Torque Requirements, Foot Pounds (Metric Bolts)
CLASS 8.8
MINIMUM
1.75
6
14
28
48
118
230
400
580

Check Chiller Tightness

Figure 19 outlines the proper sequence and procedures for leak
testing.
The 19XR chillers are shipped with the refrigerant contained in
the condenser shell and the oil charge in the compressor. The
cooler is shipped with a small positive pressure refrigerant
holding 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
(page 23).
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 transferred. Adjust
the springs when the refrigerant is in operating condition and
the water circuits are full.
SAE 5
SOCKET HEAD OR HEX
WITH 3 RADIAL LINES, OR SA499
MEDIUM CARBON STEEL
MINIMUM MAXIMUM
6
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
MAXIMUM
2.5
9
20
40
70
170
330
570
830
21
SAE 8
HEX HEAD
WITH 6 RADIAL LINES OR
SA354 GR BD
MEDIUM CARBON STEEL
MINIMUM
9 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
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