Gree R410A, Manual

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49
for North America
Photovoltaic Direct-driven VRF
2) Y-type branch has several pipe sections with different dimension, which facilitates to match with various copper pipes. Use pipe
cutter to cut in the middle of the pipe section that is of proper dimension and remove burrs as well.
3) Y-type branch must be installed vertically or horizontally.
4) Branch shall be isolated by insulating material that can bear 120° or even higher temperature. The attached foam of branch cannot
be taken as insulating material.
Within ±30°
Cut in the middle
Within ±30°
o
NOTICE! Branch shall be isolated by insulating material that can bear 120
O
C(248
O
F)or even
higher temperature. The attached foam of branch cannot be taken as insulating material.
7.1.5 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(19-3/4inch)straight pipe section.
3) Thermal insulation for pipeline.
① .
To avoid condensate or water leakage on the connection pipe, the gas pipe and liquid pipe must be wrapped with thermal insulating
material and adhesive tape for insulation from the air.
② .
Thermal insulating material shall be able bear the pipe temperature. For heat pump unit, liquid pipe should bear 70
O
C or above and
gas pipe should bear120
O
C or above. For cooling only unit, both liquid pipe and gas pipe should bear 70
O
C or above.
Example: Polyethylene foam (bear 120
O
C or above); foaming polyethylene (bear 100
O
C or above).
③ .
Joints of indoor and outdoor unit should be wrapped with insulating material and leave no gap between pipe and wall.
Thermal insulating layer is required to be wrapped at this part.
Thermal insulating pipe
No gap
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 rape 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.