ENG-
E-21
AIR REMOVAL
Lo
Hi
Valve shaft cap tightening torque
Pipe size
Torque
รุนเครื่
องปรับอากาศ
รุนเครื่
องปรับอากาศ
Liquid side
1/4"
24±3N · m (2.4±0.3 kgf · m) AH/AU-PN10, 13, 19 and 24
AH/AU-L10, 13
Gas side
3/8"
9K-Btu/h type
31±3 N · m (3.1±0.3 kgf · m) AH/AU-PN10 and L10
1/2"
12K 18K-Btu/h type
31±3 N · m (3.1±0.3 kgf · m) AH/AU-PN13, 19 and L13
5/8"
24K-Btu/h type
31±3 N · m (3.1±0.3 kgf · m) AH/AU-PN24
Service port cap tightening torque
Torque
11±1 N · m (1.1±0.1 kgf · m)
(1) Remove both valve shaft caps of the 2 and 3-way valves.
(2) Remove the service port cap of the 3-way valve.
(3) Connect the gauge manifold hose to the service port and the vacuum pump.
Be sure that the hose end to be connected to the service port has a valve core pusher.
(4) Open the gauge manifold low-pressure valve(Lo) and operate the vacuum pump for 10-15 minutes.
Make sure the compound gauge reads -0.1 MPa(-76 cmHg).
(5) Close the gauge manifold valve.
(6) Turn off the vacuum pump.
Leave as it for 1-2 minutes and make sure the needle of the compound gauge does not go back.
(7) Open the 2-way valve 90° counterclockwise by turning the hexagon wrench. Close it after 5 second,
and check for gas leakage.*
(8) Disconnect the gauge manifold hose from the service port.
(9) Fully open the 2-way valve with hexagon wrench.
(10) Fully open the 3-way valve with hexagon wrench.
(11) Firmly tighten the service port cap and both valve shaft caps with a torque wrench at the specified
tightening torque.
* Check the pipe connections for gas leak using a leakage detector or soapy water.
Gauge manifold
Compound gauge
Vacuum pump
Service port cap
3-way valve
Valve shaft cap
2-way valve
Hexagon wrench
(Diagonally 4 mm)
OPEN
Service port
CLOSE
OM_AH-PN10 13GY_EN.indd Sec1:21
OM_AH-PN10 13GY_EN.indd Sec1:21
12/22/11 6:30:37 PM
12/22/11 6:30:37 PM
