DC INVERTER MULTI VRF INSTALLATION
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8 INSTALLATION OF CONDENSATE PIPE
8.1 Material quality requirements
Generally, the condensate pipe shall be water supply U-PVC pipe, adhered by using special glue.
The other materials available include: PP-R pipe, PP-C pipe and hot-dipped galvanized steel pipe.
It is not allowed to use aluminum plastic composite pipe.
8.2 Key points for installation
1
）.Work Order
2). Determine the direction and elevation of condensate pipe before installation. To ensure the
gradient smooth and straight, avoid intersecting with other pipelines. The height of the
clamp fixing the pipe hanger frame shall be adjustable and fixed from the outer of thermal
insulation.
3).Distance between hanger frames:
Outer diameter of water
pipe (mm)
ф≤25 32＞ф≥25 ф≥32
Spacing between
horizontal pipes (mm)
800 1000 1500
Spacing between
standpipes (mm)
1500 2000
Each standpipe shall have two hanger frames at least.
4). The gradient of condensate pipe shall be over 1% and the gradient of main pipe shall not
be less than 0.3%, while there shall be no overhanging slope.
5). When connecting the 3-way section of condensate pipe, the 2-way straight section on 3-way
pipe shall be on the same gradient. The two ends of 2-way section shall not have different
gradient. See the schematics below:
错误的接法
正确的接法
6). Confluence toward the horizontal pipe shall be best from the upper. Back flow is easy to
occur if from the lengthwise direction.
Installation of
indoor unit
Sheathing of
thermal insulation
pipe on
condensate pipe
Connection of
drainage pipe
Water test
Thermal insulation o
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