Liebert Precision Cooling System DS - Manual (Page 68)

Disassembling the Liebert DS for Transport
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6.6 Reassembly—Upflow Unit
1. Reattach the top section using thread-cutting bolts; there are four on each side.
Torque the bolts to 225 in-lb (25Nm).
2. Reinstall the motor access plate.
Do not replace the left end coil access plates until brazing is finished.
3. Reattach the compressor section. Insert all compressor thread-cutting bolts before tightening
them all down.
4. Reinstall the pull bar to support the accent panel.
5. Reinstall the low-voltage plugs in the compressor section.
6. Rewire the compressor, reheat, humidifier, condensate pump and smoke detector, if applicable.
7. Reattach the sensing tube to the blower inlet.
8. Reattach the plug connection at the actuator and reroute the sensor back through electric box and
onto control board, on GLYCOOL and dual-cool units.
9. Piping must be reassembled in accordance with local codes.
10. Move the insulation and plastic bushings away from the brazing area.
11. Wrap the piping with wet cloths. Use copper fittings where required.
12. Refer to 8.0 - Piping for piping guidelines and to the ASHRAE Refrigeration Handbook for
general, good-practice refrigeration piping.
13. Open service valves on compressor.
14. Reinsert plastic bushings.
15. Charge the Liebert DS with refrigerant; see the unit’s nameplate for the proper charge.
16. Replace the galvanized panels on the left side of the coil.
17. Replace the filters.
18. Replace the panels.
6.7 Reassembly Checklist
___ 1. Thread-cutting bolts reconnected at a torque specification of 225 in-lb (25Nm).
___ 2. High-voltage wires connected to proper contactors:
___ a. compressor
___ b. reheat, if applicable
___ c. humidifier, if applicable
___ d. condensate pump, if applicable
___ 3. Low-voltage wires connected:
___ a. actuator
___ b. terminal strip
___ c. plug connections
___ d. smoke detector, if applicable
___ 4. Coil access plates on left side replaced
___ 5. Motor access plate on right side replaced
___ 6. Water lines brazed
___ 7. Suction and liquid refrigerant lines brazed
___ 8. Unit recharged
___ 9. Filters replaced
___ 10. Panels replaced