AIR COOLED SCROLL CHILLER MAINTENANCE
40
Disassembly and Assembly of 4-way valve
Remarks: Before removing the 4-way valve, cut off the power and reclaim the refrigerant;
Step Illustration Handling Instruction
1. Record the
direction of the
4-way valve before
welding it. Do not
refer to the other
system.
z Record the direction of
4-way valve before
removing it.
z remove the coil.
z Wrap the 4-way valve
with wet cloth before
welding so that it is
complete and can be
analyzed in the future.
z 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.
z the new 4-way valve
should be the same as the
replaced one. If not, it
should be confirmed by
the professionals.
z wrap the the 4-way valve
with wet cloth.
z Connect the the 4-way
valve with the four
connecting pipe according
to the original direction.
z Connect the pipe by
welding.
z Charge nitrogen when
welding.
3. Pressurize and
vacuumize the
system. Recharge
the refrigerant.
z Ensure that the vacuum
degree is -1.0bar. The
period for vacuuming is
longer.
z The name and wight of
the charged refrigerant
should comply with the
reqiurement marked on
the nameplate.
To Next Page
Loading...
