LG LSN5AP2D, Руководство пользователя

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Lo Hi
Indoor unit
Outdoor unit
Manifold valve
Charge hose
Nitrogen gas
cylinder(in vertical
standing position)
Pressure
gauge
Air purging
Pressure in the system rises.
Air an d m ois tu re re ma in in g in th e re fri ge ra nt
sy ste m h av e u nd es ira ble eff ec ts as in dic ate d
be lo w.
Operating current rises.
Cooling(or heating) efficiency drops.
Mo is tu re in th e r efr ig er an t c ir cu it ma y
fr ee ze an d b lo ck ca pil la ry tu bin g.
Water may lead to corrosion of parts in the
refrigeration system.
Therefore, the indoor unit and tubing between
the indoor and outdoor unit must be leak tested
and evacuated to remove any non condensable
gas and moisture from the system.
Air purging with vacuum
pump
A
Check that each tube(both liquid and gas
sid e tu be s) be tw ee n th e in do or an d
ou td oo r un it s ha ve be en pr op er ly
connected and all wiring for the test run
has been completed. Remove the service
valve caps from both the gas and the liquid
side on the outdoor unit. Note that both the
liquid and the gas side service valves on
the outdoor unit are kept closed at this
stage.
B
Leak t est
Connect the manifold valve(with pressure
gauges) and dry nitrogen gas cylinder to
this service port with charge hoses.
Do a leak test of all joints of the tubing(both
indoor and outdoor) and both gas and liquid side
service valves.
Bubbles indicate a leak. Be sure to wipe off the
soap with a clean cloth.
After the system is found to be free of leaks,
relieve the nitrogen pressure by loosening the
charge hose connector at the nitrogen cylinder.
When the system pressure is reduced to normal,
disconnect the hose from the cylinder .
AIR PURGING
Prepar ation
INSTALL ATION
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.
CAUTION
18
Be sure to use a manifold valve for air
purging. If it is not available, use a stop valve
for this purpose. The 3-way valve must always
be kept close.
CAUTION
Pressurize the system to maximum 250
P .S.I.G.(R-22 model) or 400 P .S.I.G.
(R-410A model) with dry nitrogen gas and
close the cylinder valve when the gauge
reading reached 250 P .S.I.G. (R-22 model)
or 400 P .S.I.G. (R-410A model). Next, step
is leak test with liquid soap.
There is a risk of fire and explosion.
- Inert gas (nitrogen) should be used when you
check plumbing leaks, cleaning or repairs of
pipes etc.
If you are using combustible gases including
oxygen, product may have the risk of fires and
explosions.
CAUTION