DC Inverter U-match Series Floor Ceiling Type Unit
23
pipe to balance the pressure inside and outside of the connection pipe, so that
air will not come into the connection pipe when removing the hose. Note that
the gas and liquid valve can be opened fully only after the manifold valve
assembly is removed.
(8). Place back the caps of the liquid valve, gas valve and also the service port.
Fig. 4.17
Note: For the large-sized unit, it has the service port for both the gas valve and the
liquid valve. During evacuation, it is available to connect two hoses of the manifold
valve assembly to two service ports to quicken the evacuating speed.
5.4.2 Additional Charge
18K~36K
：
Refrigerant suitable for a piping length of 5m is charged in the outdoor
unit at the factory. When the piping is longer than 7m, additional charging is necessary.
48K~60K
：
Refrigerant suitable for a piping length of 7.5m is charged in the outdoor
unit at the factory. When the piping is longer than 10 m, additional charging is
necessary.
For the additional amount, see Table 4.4.
Table 4.4
Additional Refrigerant Amount for Extra Pipe
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