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Beschikbare talen
Beschikbare talen
INSTALLATIE
26
Soap water method
- Remove the caps from the 2-way and 3-way
valves.
- Remove the service-port cap from the 3-way
valve.
- Apply a soap water or a liquid neutral
detergent on the indoor unit connection or
outdoor unit connections by a soft brush to
check for leakage of the connecting points of
the piping.
- If bubbles come out, the pipes have leakage
Evacuation
- Connect the charge hose end described in
the preceding steps to the vacuum pump to
evacuate the tubing and indoor unit. Confirm
the "Lo" knob of the pressure Gauge is open.
Then, run the vacuum pump. The operation
time for evacuation varies with tubing length
and capacity of the pump. The following table
shows the time required for evacuation.
OPMERKING
!
for R32 Only
• Electronic leak detectors shall be used to
detect flammable refrigerants, but the
sensitivity may not be adequate, or may need
re-calibration. (Detection equipment shall be
calibrated in a refrigerant-free area.)
• Leak detection equipment shall be set at a
percentage of the LFL (Lower flammable
limit) of the refrigerant and shall be calibrated
to the refrigerant employed and the
appropriate percentage of gas (25 %
maximum) is confirmed.
• Leak detection fluids are suitable for use with
most refrigerants but the use of detergents
containing chlorine shall be avoided as the
chlorine may react with the refrigerant and
corrode the copper pipe-work.
• If a leak is suspected, all naked flames shall
be removed/extinguished.
• If a leakage of refrigerant is found which
requires brazing, all of the refrigerant shall be
recovered from the system, or isolated (by
means of shut off valves) in a part of the
system remote from the leak.
• Oxygen free nitrogen (OFN) shall be purged
through the system both before and during
the brazing process.
Outdoor unit
3-way valve
3-way or
2-way valve
* The feature can be changed according
a type of model.
Required time for evacuation when 30 gal/h
vacuum pump is used
If tubing length is
less than 10 m
(33 ft)
10 min. or more
- When the desired vacuum is reached, close
the knob of the 3-way valve and stop the
vacuum pump.
Finishing the Job
- With a service valve wrench, turn the valve
of liquid side counter-clockwise to fully open
the valve
- Turn the valve of gas side counter-clockwise
to fully open the valve
- Loosen the charge hose connected to the
gas side service port slightly to release the
pressure, then remove the hose.
- Replace the flare nut and its bonnet on the
gas side service port and fasten the flare nut
securely with an adjustable wrench. This
process is very important to prevent leakage
from the system
- Replace the valve caps at both gas and liquid
side service valves and fasten them tight.
This completes air purging with a vacuum
pump.
- Replace the pipe cover to the outdoor unit by
one screw. Now the air conditioner is ready
for test run.
Gas side
Liquid side
Cap
If tubing length is
longer than 10 m
(33 ft)
15 min. or more
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