GMV5 HR Heat Recovery Cooling and Heating Mode Exchanger
16
（4）
Branch shall be insulated by insulating material that can bear 120° or even higher temperature.
The attached foam of branch cannot be taken as insulating material.
4.2.3 Thermal insulation for pipeline
（1）
For multi VRF system, every copper pipe should be labeled so as to avoid misconnection.
（2）
At the branch inlet, leave at least 500mm straight pipe section. For FQ04 branch, leave at least
800mm straight pipe section.
（3）
Thermal insulation for pipeline
1）
To avoid condensate or water leak on the connection pipe, the gas pipe and liquid pipe must
be wrapped with thermal insulating material and tied by adhesive tape.
2）
Thermal insulating material shall be able to bear the pipe temperature: For heat pump unit,
liquid pipe should bear 70
℃
or above and gas pipe should bear 120
℃
or above. For cooling
only unit, both liquid pipe and gas pipe should bear 70
℃
or above. Example: Polyethylene
foam (bear 120
℃
or above); foaming polyethylene (bear 100
℃
or above)
3）
Joints of indoor and outdoor unit should be wrapped with insulating material and leave no gap
to surfaces of indoor unit and outdoor unit. See Fig.4.2.4.
Fig 4.2.4
4）
Thermal insulating material of branches should be the same as that of the pipeline. The
attached foam of branches cannot be taken as insulating material.
5）
When wrapping the tape, the later circle should cover half of the former one. Don’t wrap the
tape too tight, otherwise the insulation effect will be weakened.
6）
After wrapping the pipe, apply sealing material to completely seal the hole on the wall.
4.2.4 Support and protection of pipeline
（1）
Support should be made for hanging connection pipe. Distance between each support cannot
be over 1m.
（2）
Protection against accidental damage should be made for outdoor pipeline. If pipeline exceeds
1m, a pinch plate should be added for protection.
