Check Chiller Tightness - Carrier AquaEdge 23XRV Start-Up, Operation And Maintenance Instructions Manual

Table 5 — Bolt Torque Requirements, Foot Pounds
(Metric Bolts)
CLASS 8.8
BOLT SIZE
(METRIC)
MINIMUM MAXIMUM
M4 1.75
M6 6
M8 14
M10 28
M12 48
M16 118
M20 230
M24 400
M27 580
CLASS 10.9
MINIMUM MAXIMUM
2.5 2.5 3.5
9 8 12
20 20 30
40 40 57
70 70 100
170 170 240
330 330 470
570 570 810
830 820 1175

Check Chiller Tightness

Figure 26 outlines the proper sequence and procedures for leak
testing.
The 23XRV chillers are shipped with a full refrigerant and oil
charge. Units may be ordered with the refrigerant shipped sepa-
rately, and a 15 psig (103 kPa) nitrogen-holding charge in each
vessel. To determine if there are any leaks, the chiller should be
charged with a refrigerant tracer. Use an electronic leak detector to
check all flanges and solder joints after the chiller is pressurized. If
any leaks are detected, follow the leak test procedure.
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 liq-
uid circuits are full.
25