Liebert DM Series User Manual

Chapter 2 Mechanical Installation 13
New Liebert_DM Series Air Conditioner User Manual
4. If jointing mode is needed, all refrigerant piping should be connected with silver-brazed joints.
5. Check piping supports, leakage testing, dehydration of refrigerant pipes and evacuation before using. Use vibration
isolating support to isolate the refrigeration pipes from the building.
6. Use a soft and flexible material to pack around the pipes to protect them from damage caused by going through
openings in walls and to reduce vibration transmission.
7. When installing the outdoor unit 7.5m higher than the indoor unit, a trap should be installed on the discharge pipe.
This trap will retain refrigerant oil in the off cycle of the compressor. When the compressor starts, oil in the trap will be
carried up the vertical riser and return to the compressor immediately.
Pipe connector position
The pipe connectors inside the indoor unit are shown in Figure 2-12.
A amplified
A
Condensate water
drain pipe (I.D.19mm)
Discharge pipe:
straight pipe 1/2"-12mm;
connector 3/4"-20mm thread
Liquid pipe:
straight pipe
3/8"-10mm;
connector 5/8"-16mm thread
Knock-out hole
Pipe connectors inside DME07kW indoor unit
B amplified
B
Condensate water
drain pipe (I.D.19mm)
Discharge pipe:
straight pipe 5/8"-16mm;
connector 7/8"-22mm thread
Liquid pipe:
straight pipe 1/2"-12mm;
connector 3/4"-20mm thread
Knock-out hole
Pipe connectors inside DME12kW indoor unit
Figure 2-12 Pipe connectors inside the indoor unit

Liebert DM Series Specifications

General

Brand	Liebert
Model	DM Series
Category	Air Conditioner
Language	English