Gree LSQWRF35VM/NaA-M Service Manual page 45

When the three-way valve is used for the condensate pipe, its straight two connectors should be kept
at the same level as shown in the figure below.
When there are several indoor units at the same floor, their condensate is usually drained out through
one main pipe. In this case, the branches pipe for each unit should be located higher than the main pipe.
The size of the condensate pipe is determined by the capacity and number of the indoor units.
Size of the tee drain pipe should match with the running capacity of the unit.
As pressure at the water outlet is quite large, an water trap is required for the drain pipe, which is
applicable to the horizontal type air handing units and the indoor units of the duct type air conditioners.
A=P+25mm
B=P/2+25mm
P indicates the the passive pressure (mmH
The pipe diameter should be or larger than 32mm.
(2) Insulating
The extended drain pipe should be insulated and special care must be paid to the elbows. See the
table below for the thickness of the insulation.
Drain pipe (mm)
All
Insulation should be thickened at humid areas.
Unit Installation
Tee joint
O, 1mmH O=9.80665pascals) .
2 2
Water trap
Thickness of insulation (mm)
41
≥15