Connecting Drain Pipe Of Indoor Unit; Connecting Humidifier Water Supply Pipe (If Applicable) - Liebert DM Series User Manual

14 Chapter 2 Mechanical Installation
Connecting discharge pipe
Connect one end of the discharge pipe to the discharge pipe connector of the indoor unit shown in Figure 2-12, and
the other end to the discharge pipe connector of the outdoor unit shown in Figure 2-13.

Note
The discharge pipe is the pipe at the compressor discharging side. Its horizontal section should be sloped downward, away from
the compressor, with a slope of at least 1:200 (5mm down for each 1m run). The discharge pipe should be insulated where it is
routed in the conditioned space (including under a raised floor).
Connecting liquid pipe
Connect one end of the liquid pipe to the liquid pipe connector of the indoor unit shown in Figure 2-12, and the other
end to the liquid pipe connector of the outdoor unit shown in Figure 2-13.

2.6.5 Connecting Drain Pipe Of Indoor Unit

Connect one end of the drain pipe to the connector of condensate water drain pipe shown in Figure 2-12. The drain
pipe of the indoor unit uses a 20mm (3/4") connector with hose barb connections, one of which is used to fasten the
outdoor drain pipe. The drain pipe cannot be placed in position with freezing temperature. The drain pipe should be
the full size of the drain pipe connector.

Note
The drain pipe of the indoor unit equipped with a humidifier must be able to endure the boiling water temperature. Use
galvanized steel pipe, aluminum-plastic composite pipe with hot water type or PP-R polypropylene plastic pipe with hot water
type as the drain pipe.

2.6.6 Connecting Humidifier Water Supply Pipe (If Applicable)

Connect one end of the humidifier water supply pipe to the connector of the humidifier water supply pipe shown in
Figure 2-14, and the other end to the water tap through the knock-out hole of water inlet pipe shown in Figure 2-12.
A amplified
A
B amplified
B
Figure 2-13 Refrigerant pipe connectors of outdoor unit
New Liebert_DM Series Air Conditioner User Manual
Discharge pipe DMC12/DML12 (straight pipe 5/8";
connector 7/8"-22mm thread)
Liquid pipe DMC12/DML12 (straight pipe 1/2";
connector 3/4"-20mm thread)
Discharge pipe DMC07/DML07(straight pipe1/2";
connector 3/4"-20mm thread)
Liquid pipe DMC07/DML07(straight pipe3/8";
connector 5/8"-16mm thread)