Vertiv Liebert DSE - Page 89

Removing Compressor Assembly forDownflowDA125,DA150andDA165
1. Secure the compressor wire harness to the compressor assembly.
2. Remove the 20 thread-cutting bolts holding the compressor section assembly to the filter and
electric-box assembly and the blower and coil assembly.
There are eight bolts in the front, eight in the back and four in the bottom 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 bolts.
NOTICE
Risk of improper handling. Can cause compressor and/or piping damage.
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 DSE.
NOTE: We recommend using piano jacks when moving this section.
Notice
Risk of improper handling. Can cause equipment damage.
• The blower and coil assembly must remain upright. The coil is not secured to the blower
and coil assembly.
• Secure the coil to the bottom section with straps or a similar method before moving the
section.
3. Move each section of the DSE to the installation location.
B.5 Reassembling Downflow DA125, DA150andDA165
1. Replace the compressor section.
Insert all thread-cutting compressor bolts before tightening any of the bolts.
2. Reattach the low-voltage plugs in the compressor section.
3. Reconnect the wiring for the compressor.
Reconnecting Piping, Charging
andReplacingPanelsforDownflowDA125,DA150andDA165
1. Piping must be reassembled in accordance with local codes.
2. Move insulation and plastic bushings away from the brazing area.
3. Wrap piping with wet cloths. Use copper fittings where required.
4. Refer to Piping and Refrigerant Requirements on page31, for piping guidelines and to the
ASHRAE Refrigeration Handbook for general, good-practice refrigeration piping.
5. Open the service valves on the compressor.
6. Reinsert the plastic bushings.
7. Charge the DSE with refrigerant; see the unit’s nameplate for the proper charge.
8. Reinstall the galvanized panels on the left side of the coil.
9. Replace the panels.
10. Install the filter plenum as instructed in the instructions included with the plenum.
Re-assembly Checklist forDownflowDA125,DA150andDA165
1. Thread-cutting bolts reconnected and torqued to 225 in-lb. (25 Nm)
2. Top cover plate attached to coil
3. Filter plate attached
4. High-voltage wires connected to proper contactors on compressor
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