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(3) There must be three fixing point for both horizontal and vertical installation of the Y-type manifold.
See Fig.4.25.
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 pipe from the welding point
Fixing point 3: 250mm(9-13/16in.) on the branched pipe from the welding point
(4) 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℃(158℉) or above and gas pipe should bear 120℃(248℉) or
above. For cooling only unit, both liquid pipe and gas pipe should bear 70℃(158℉) or above.
Example: Polyethylene foam (bear 120℃(248℉) or above); foaming polyethylene (bear
100℃(212℉) 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. 4.26,Fig. 4.27 and Fig. 4.28.
Cooling and Heating Recovery Mode Exchanger
Fig.4.24
Fig.4.25
18
Unit: mm(in.)
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