122
DC Inverter Multi
VRF Service Manual
6 INSTALLATION OF CONDENSATE PIPE
6�1Material Quality Requirements for Condensate Pipe
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.
6�2 Key Points for Condensate Pipe Installation
6.2.1 Work Order
Installation
of indoor unit
Sheathing of thermal
insulation pipe on
condensate pipe
Connection of
drainage pipe
Water test
Thermal insulation
of drainage pipe
6.2.2 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 xing the pipe hanger frame shall be adjustable
and xed from the outer of thermal insulation.
6.2.3 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.
6.2.4 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.
(1cm/1m)
Over 1/100
6.2.5 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:
Wrong connection
Correct connection
6.2.6 Conuence toward the horizontal pipe shall be best from the upper. Back ow is easy to occur if from the lengthwise
direction.
Indoor Unit
Mounting of
horizontal pipe
Main
pipe
Main
pipe
Main
pipe
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