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INSTALLATION INSTRUCTIONS
Evacuation
Connect the vacuum pump at both liquid and suctions valves
Operation Procedure:
IMPORTANT:
• To prevent the oil going into the pipe, please use the special tool for R410A, especially for gauge manifold and charging
hose.
• To prevent the oil from going into the refrigerant cycle, please use the anti-counter flow adapter.
• Release the refrigerant check valve during outdoor unit maintenance. Set the relative dip switch when evacuating
system.
Tighten torque as the table below shows:
Stop valve diameter
(in.)
1/4
3/8
1/2
5/8
3/4
Check valve operation
Open/ close method:
• Take down the valve cap, suction gas pipe, HP gas pipe turns to "open"
• Turn the liquid pipe and the oil equalization pipe with hexangular spanner until it stops. If opening the valve strongly, the
valve will be damaged.
• Tighten the valve cap.
Tighten torque as the table below:
For suction gas pipe and HP gas pipe
For liquid pipe
For oil equalization pipe
31-5000573 Rev. 2
After reaching 0.007psi or
less than 350 microns, let the
vacuum run continuously
If the vacuum pointer rises, it shows there is water or leakage in the
system. Please check and modify it, then evacuate again.
Fastening torque
(ft.lb)
10.33 to 13.28
25.08 to 30.98
36.14 to 44.99
50.15 to 60.48
61.96 to 72.28
"open"state
Tighten torque N·m
Shaft (valve body)
Less than 7
7.85 (MAX15.7)
4.9 (MAX11.8)
Vacuum should
not rise above 500
microns
Fastening angle
Recommended tool length
(°)
45~60
30~45
30~45
15~20
15~20
"close"state
Cap (cover)
T-shape nut (check joint)
Less than 30
29.4 (MAX39.2)
16.2 (MAX24.5)
in(mm)
5-29/32(150)
7-7/8 (200)
9-13/16 (250)
11-13/16(300)
11-13/16(300)
13
8.8 (MAX14.7)
8.8 (MAX14.7)
25
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