Envicool XRow Series - Page 34

Shenzhen Envicool Technology Co., Ltd.
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Table 2-15Connecting pipes specifications of the XRow system(0m drop height)
Model
Length(m)
10
20
30
40
50
60
XR023A
Gas(mm)
16
16
16
19
19
19
Liquid(mm)
13
13
13
13
13
13
XR040A
Gas(mm)
19
19
19
22
22
22
Liquid(mm)
16
16
16
16
16
16
XR050A
Gas(mm)
22
22
22
22
25
25
Liquid(mm)
19
19
19
19
19
19
The indoor unit is equipped with a ball valve on the connecting side. The connection of the ball
valve is shown in Figure 2-22. When welding the ball valve should be wrapped with a damp
cloth, and the ball valve core should be removed first.
Fig. 2-22 Schematic Diagram for indoor unit connection pipe side ball valve
 Note：
1、While connecting the pipes between the indoor unit and the outdoor unit, make sure the
pipes go through the wall horizontally and are sleeved with protective tube when going through
the wall. To protect the pipes against damage when the pipes going through the wall and to
reduce vibration, the pipes shall be wound with protective tape and the hole shall be sealed
with plaster. The protective plug of the pipe connector cannot be removed until it has
penetrated the wall and begins to connect the external equipment.
2、The unit with pump cabinet or the unit with V-coil tube must be equipped with check valve.
The one-way valve is installed near the air inlet of the outdoor unit condenser.
3、All the pipes shall be subject to high temperature soldering and be filled with nitrogen to
prevent from oxidation. The pipe must be cleaned before welding process, such as using high
pressure nitrogen to purge.
4、After welding, pressure leakage need to be inspected of the connecting pipe. HP nitrogen
should be filled in the pipe to maintain pressure. It is recommended that the pressure should be
2.0~4.0MPa and the pressure leakage inspection time should be no less than 24 hours. After
pipe leakage inspection inspection, vacuumize the pipe. The vacuum-pumping time should be
no less than 1 hour.