Use and Care Manual

17
Hose with the valve pin
gauge manifold
pipe
pipe
VAC valve
Vacuum pump
Service port
Low pressure gauge
High pressure gauge
Gauge manifold kit
Fig. 4.17
Note: For 24K above units, 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.
4.4.2 Additional Charge
Refrigerant for the pipe length of 7.6m (25 feet) has been charged at the factory.
When the piping is longer than 7.6m(25feet), additional charging is necessary.
For the additional amount, see Table 4.6.
Table 4.6
Model
Item
Additional Refrigerant Amount for Extra
Pipe
18K 45g per 1.5 m (1.6 ounce per 5 feet )
24~48K 90g per 1.5 m (3.2 ounce per 5 feet )
When height difference between indoor unit and outdoor unit is more than 10m(30feet),
an oil return bend should be added for every 6m(20feet) connection pipe. 
Oil return bend
Oil return bend
Indoor
Outdoor
6m (20feet)
Fig.4.18
U-match Series Cassette Type Unit