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Leak checking of unit and field piping – Emerson Liebert CRV 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 C R 0 2 0 R A 1 C 7 S D 1 8 1 1 E L 1 0 P A User Manual

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Piping

17

Liebert

®

CRV

Leak Checking of Unit and Field Piping

Liebert unit fluid systems are factory-checked for leaks and may be shipped with a nitrogen holding

charge. Liebert unit fluid circuits should be checked for leaks at installation as described below.

NOTE
During leak checking of field-installed piping, Emerson recommends that the unit be isolated

using field-installed shutoff valves. When the Liebert units are included in a leak test, use of

fluid for pressure testing is recommended. When pressurized gas is used for leak testing the

Liebert unit, the maximum recommended pressure is 30 psig (2 bars) and tightness of the unit

should be verified by pressure decay over time, (<2 psig/hour [0.3 bars/hour]) or sensing a

tracer gas with suitable instrumentation. Dry seals in fluid valves and pumps may not hold a

high gas pressure.