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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 recovery 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
22
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)
11-14
25-31
30-45
50-60
61.96 to 72.28
Vacuum should
not rise above 500
microns
Fastening Angle
Recommended Tool
( ° )
Length in(mm)
45~60
5.9 (150)
30~45
7.9 (200)
30~45
9.8 (250)
15~20
11.8 (300)
15~20
11.8 (300)
31-5000572 Rev. 1
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