Gree CN851W1000, Service Manual

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DC Inverter Multi
VRF Service Manual
125
6.2.17 Connection of drainage branch pipe to the standpipe or horizontal pipe of drainage main pipe.
The horizontal pipe cannot be connected to the vertical pipe at a same height. It can be connected in a manner as
shown below:
N01: 3-way connection of drainage pipe joint
3-way connection
of drainage pipe joint
NO2: Connection of drain elbow
Connection of
drain elbow
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).
After connection of the drainage pipe is completed, firstly carry out closed water test. Seal the outlet of drainage pipe
with adhesive tape or plug. Then, fill water into the drainage pipe system form indoor unit side. Stop filling after ensuring
that all the drainage pipes are filled with water. After 24 hours, check all the joints of 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 .