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CAUTION
Be sure to use a manifold valve for air
purging. If it is not available, use a stop
valve for this purpose. The "Hi" knob of
the manifold valve must always be kept
close.
- And connect the Nitrogen cylinder to the
service port with charge hoses to the mani-
fold gauge.
- Pressurize the system to no more than 150
P.S.I.G with dry nitrogen gas. Close the nitro-
gen cylinder valve when it shows reading of
150 P.S.I.G.
!
CAUTION
To avoid nitrogen entering the refrigerant
system in a liquid state, the top of the
cylinder must be higher than its bottom
when you pressurize the system. Usually,
the cylinder is used in a vertical standing
position.
- Check for leakage with Liquid soap solution.
Do the leakage test at all joints of tubing
(indoor and outdoor) and on the service valve
(both gas and liquid side).
INSTALLATION OF DECORATIVE PANEL(ACCESSORY)
Evacuation
- If the system is found free from all leakages,
relive the nitrogen pressure by loosening the
charge hose connector at nitrogen cylinder.
Disconnect the hose from cylinder when
pressure reaches to normal state.
- Evacuation: Connect the charge hose end to
the vacuum pump and evacuate the connect-
ing of the and indoor unit. Check that the
"Lo" knob of manifold is open. Run the vac-
uum pump.
Confirm the "Lo" knob of the manifold valve
is open. Then, run the vacuum pump.
The operation time for evacuation varies with
tubing length and capacity of the pump.
The degree of vacuum should be under 0.8
Torr.
When the desired vacuum is reached, close
the "Lo" knob of the manifold valve and stop
the vacuum pump.
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