Disassembling the Liebert DS for Transport

6.6Reassembly—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.

6.7Reassembly 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

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Liebert DS user manual Reassembly-Upflow Unit, Reassembly Checklist