Installation manual
ENG-
E-21
AIR REMOVAL
Lo Hi
Valve shaft cap tightening torque
Pipe size Torque
รุนเคร องปรับอากาศ
รุนเคร 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 Sec1:21OM_AH-PN10 13GY_EN.indd Sec1:21 12/22/11 6:30:37 PM12/22/11 6:30:37 PM