Cooper & Hunter GRS-Cm18/A-M, Service Manual

Page: 46 / 58

AIR COOLED SCROLL CHILLER MAINTENANCE
44
1. Record the
direction of
the 4-way
valve before
welding it. Do
not refer to the
other system. Record the direction
of
4-way valve
before removing it.
Remove the coil.
Wrap the 4-way
valve with wet cloth
before welding so
that it is complete
and can be analyzed
in the future.
Remove the 4-way
valve.
2. Clean the
system;
replace the
4-way valve of
the same
model.
The
piping should
be the same as
it is before
removal.
The new 4-way
valve should be the
same as the
replaced one. If not,
it should be
confirmed
by the
professionals.
Wrap the the 4-way
valve with wet
cloth.
connect the the
4-way valve with
the four connecting
pipe according to
the original
direction.
Connect the pipe by
welding.
Charge nitrogen
when welding.