Ultra Heat GMV Multi VRF_Heat Recovery Serial
23
(3) There must be three fixing point for both horizontal and vertical installation of Y-type manifold.
Fixing point 1: 100mm (4in.) on the main inlet manifold from the welding point.
Fixing point 2: 200mm (7-7/8in.) on the main branched manifold from the welding point.
Fixing point 3: 250mm(9-5/6in.) on the branched pipe from the welding point.
Fig.28
(4) Thermal insulation for pipeline
1) To avoid condensate or water leakage on connecting pipe, the gas pipe and liquid pipe must be
wrapped with thermal insulating material and adhesive pipe for insulation from the air.
2) For heat pump unit, liquid pipe should bear 70ºC(158℉) or above, and gas pipe should bear 120
ºC(248℉) or above. For cooling only unit, both liquid pipe and gas pipe should bear 70ºC(158℉)
or above. Example: Polyethylene foam can bear 120ºC(248℉) above and foaming polyethylene
can bear 100ºC(212℉) above.
3) Joints at indoor and outdoor units should be wrapped with insulating material and leave no
clearance between pipe and wall.
Fig.29
4) Manifold attached foam 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
so tightly, otherwise the insulation effect will be weakened.
6) After wrapping the pipe, adopt sealing material to completely fill the hole so as to prevent wind
and rain from entering the room.
4.4.4 Support and protection for pipeline
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