MCXE-IOM
17
Gas Leakage Inspection
Gas Leakage Inspection
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Caution
After the refrigerant pipe system is complete, It is necessary
to check gas leakage. Inspecting gas leakage should be done
with special precaution. If there is any leakage that we are
unable to find, afterwards the system would be damage. For
example, if R32 refrigerant loses, cooling coil will be frozen.
There are so many methods to inspect leakage, but the easiest
and the most economical way is to use nitrogen gas detector
and bubble of powder detergent per the following steps.
Prepare nitrogen tube with pressure regulator and pressure
gauge or manifold gauge.
Open service valve cover (at the suction side).
Connect gauge line to the nitrogen tank, but do not open
nitrogen valve at the nitrogen tank.
Check out brazing track and all valves such as flare union.
Slowly open nitrogen valve, let pressure gradually increase
until 400 pound/square inches (psig), then put bubble of
powder detergent around all connected joints, notice any
leakage. Fix the leakage, if any. If there is no leakage, leave
1-2 hours to check whether the pressure stays the same.
If the pressure is still reducing, we need to check leakage
again. Finally, release nitrogen gas in order to make
refrigerant system to be under vacuum.
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Do not fully open nitrogen valve to 400 psig because valve
may be damage.
Do not forget to check the leakage at the access valve both
at the liquid line and at the suction line.
Do not use R22 and R32 Manifold guage together because
- R32 pressure more than R22 1.5 times
- Different compressor oil type. So can’t be used together.
Note:
In the case of refrigerant leakage
In air condition system. R32 can’t addition charge refrigerant
like R22. Must release all remain refrigerant in unit, until
pressure 0 psi. Then check for leakage and fix it. After
checking the leakage, make a vacuum system. And recharge
refrigerant R32 again. Because R32 is mixture. If addition
charge refrigerant like R22, it will affect to cooling performance
from wrong mixture.
Summary of Contents for TTKE12SB5EAA
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Page 87: ...38 MCXE IOM Wiring Diagram Outdoor Unit Series 5 Model TTKE12SB5EAA TTKE18SB5EAA...
Page 88: ...MCXE IOM 39 Wiring Diagram Outdoor Unit Series 5 Model TTKE24SB5EAA...
Page 89: ...40 MCXE IOM Wiring Diagram Outdoor Unit Series 5 Model TTKE30SB5EAA...
Page 90: ...MCXE IOM 41 Wiring Diagram Outdoor Unit Series 5 Model TTKE36SB5EAA...
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