ƲƸ
Hose with the valve pin
gauge manifold
Pressure gauge (Low-pressure)
Pressure gauge (Hi-pressure)
Switch (Low-pressure)
Switch (Hi-pressure)
Connection pipe (to indoor unit)
Liquid valve
Gas valve
Service port
Cap
Hose
Vacuum pump
Cap
Service pipe
Cap
Connection pipe
Figure 3-3-7
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.
Refrigerant suitable for a piping length of 7.6m (25feet) is charged in the outdoor unit at the factory.
When the piping is longer than 7.6m (25feet), additional charging is necessary.
For the additional amount, see Table 3-3-2.
When the height difference between the indoor unit and outdoor unit is larger than 10m (32-4/5feet),
an oil bend should be employed for every 6m (19-2/3 feet).
ƴ.1.7.2 Additional Charge
MODEL
Additional Refrigerant Amount for
Extra Pipe
18K 45g per 1.5 m (1.6 ounce per 5 feet )
24K~48K 90g per 1.5 m (3.2 ounce per 5 feet )
Oil bend
Indoor
Outdoor
6m(19-2/3feet)
Oil bend
Figure 3-2-5
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