User manual

Disassembling the Liebert DS for Transport

Liebert

™

18. Evacuate and recover all refrigerant from the Liebert DS.

Air-cooled units are shipped with a nitrogen holding charge. Water, glycol and GLYCOOL units

are factory-charged with refrigerant. Refer to 9.0 - Piping for piping guidelines and to the

ASHRAE Refrigeration Handbook for general, good-practice refrigeration piping.

NOTICE

Risk of compressor oil contamination with moisture. Can cause equipment damage.

Emerson recommends front-seating the compressor service valves. Front-seating the valves

keeps the nitrogen or refrigerant charge in the compressor and prevents moisture from

contaminating the compressor oil. This is particularly important with units using R-407C

refrigerant.

19. Cut the insulation and pull it back from the piping.

20. Cut the refrigerant piping with a tubing cutter; if there is no Schrader fitting, let the nitrogen

bleed out before cutting all the way through the pipe.

21. Unsweat or cut all copper water pipes that interconnect unit sections.

22. Immediately cap and seal all piping that has been cut, including the suction and liquid lines, as

well as the fluid piping on GLYCOOL and dual-cool units.

7.2.1 Remove the Compressor Assembly

1. Secure the compressor wire harness to the compressor assembly.

2. Remove the 10 thread-cutting bolts holding the compressor section assembly to the filter and

electric box assembly and the blower and coil assembly.

There are five bolts in the front, four in the back and one on the top at the middle of the unit.

a. Begin removing bolts at the bottom of the unit and progress toward the top. Use this method

for the front and back bolts.

b. Stabilize the compressor section before removing the top, middle bolt.

NOTICE

The compressor section is top-heavy and has a small base. It must remain upright. Do not lay

the compressor section on its side during or after removing it from the Liebert DS. Do not

remove shipping blocks from semi-hermetic compressors until the Liebert DS is fully

reassembled and ready for installation.

NOTE

Emerson does not recommend unsweating refrigerant connections.

NOTE

Emerson recommends using piano jacks when moving this section.