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SiBE811001EB
Troubleshooting
CONVENI-PACK
322
3. With 2 or more thermostatic expansions valves mounted
4. Connecting position of external equalizer pipe
Connect the external equalizer pipe to the top of the suction pipe in a position 150 to 200
mm away from the mounting position of the feeler bulb and closer to the compressor.
External equalizer pipe
Distributor
Evaporator
Feeler bulb
External equalizer pipe
Distributor
Evaporator
Feeler bulb
This mounting method is
taken in order to prevent,
refrigerant gas from a
single evaporator, from
having influence on the
other feeler expansion
valve. Mount the feeler
bulb and external
equalizer pipe as shown
in figure on the left.
Make this distance
as short as possible
Main
suction pipe
Make this distance
as short as possible
External equalizer pipe
Feeler bulb
Suction pipe
Compressor
If the equalizer pipe is connected too close to the
feeler bulb, the expansion valve will be affected
with the temperature of refrigerant leaking through
the external equalizer pipe.
If the equalizer pipe is
connected to the bottom
surface of the suction pipe,
refrigerant oil or liquid
refrigerant will flow underneath
the diaphragm in the expansion
valve and fill there, thus
interfering with the operation of
the expansion valve.
Connect to the top
surface of the suction pipe