Gree GMV-PD160W/NAB-K - Test for Condensate Pipe; Requirements of Heat Preservation

87
DC Inverter Multi
VRF Service Manual
NO3: Connection of horizontal pipe
Connection of horizontal pipe
Drainage pipe is requisite for air conditioner unit. During cooling, the moisture in the air will condense on
the surface of evaporator. Such condensing water must be drained out of the unit. Meanwhile, the drainage pipe
has an important role to determine if the air conditioner can plays its full functions.
6.2.18 All the condensate pipes must be installed at a distance over 500mm from the electric box of the unit.
6.3 Test for Condensate Pipe
The water test for condensate pipe includes closed water test and drainage test. The closed water test is
focused on checking if the drainage pipe system is well sealed and if there is any leakage. The drainage test
is focused on checking if the drainage pipe system can drain water smoothly and thoroughly and ensuring that
there is no water deposit (except the specially designed water trap).
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water pipe for any leakage. If any, repair and reinstall. If no leakage, proceed to drainage test.
Remove the adhesive tape or plug from the drainage pipe. Check the water tray and drainage pipe of
indoor unit if the drainage is thorough and if there is any water deposit. If any, readjust it. If not, complete the
water test and proceed to the thermal insulation on all pipe joints.
6.4 Requirements of Heat preservation
Heat Insulation Materials
The thermal insulation material of obturator foam shall be used. Fireproof level: B1.
The thermal conductivity shall not be higher than 0.035w/ (m·k) when the average temperature is 0
.
Thickness of thermal insulation layer
The thickness of thermal insulation layer on condensate pipe shall be over 10mm.
The joint of thermal insulation materials must be adhered by using special glue and then wrapped with
plastic tape having a width not less than 5cm to avoid condensing.
Thermal insulation is not required for the outdoor section of condensate pipe.