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18
Distribution Method
Horizontal Distribution
Slave
Master
2nd
1st
Slave
Master
2nd
1st
3rd
1st
Main pipe
Distribution
3rd
Main pipe
Distribution
Vertical Distribution
- Ensure that the branch pipes are attached vertically.
Slave
Master
Slave
Master
The others
Slave
Master
Slave
Master
Header
Slave
3rd main pipe distribution
Master
2nd
1st
3rd
CAUTION
!
Leak Test and Vacuum drying
Leak test
Leak test should be made by pressurizing nitrogen gas to 3.8 MPa(38.7
2
kgf/cm
). If the pressure does not drop for 24 hours, the system
passes the test. If the pressure drops, check where the nitrogen leaks.
For the test method, refer to the following figure. (Make a test with
the service valves closed. Be also sure to pressurize liquid pipe, gas
pipe and high pressure gas pipe)
The test result can be judged good if the pressure has not be reduced
after leaving for about one day after completion of nitrogen gas
pressurization.
Slave 1 outdoor unit
Master outdoor unit
Close
Nitrogen gas
Close
cylinder
When inserting nitrogen
gas of high pressure, it
Close
must be used with
Close
regulator.
Liquid side
Indoor unit
Gas side
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