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5.3
Connecting the refrigerant piping
DANGER: RISK OF BURNING
5.3.1
Using the stop valve and service port
To handle the stop valve
▪ Make sure to keep all stop valves open during operation.
▪ The stop valves are factory closed.
NOTICE
In addition to a gas and liquid stop valve, the outdoor unit
has two maintenance stop valves. When connecting the
refrigerant piping to the outdoor unit, do NOT operate the
maintenance stop valves. The factory setting for these
valves is "open". When operating the unit, always leave
these valves in the open position. Operating the unit with
the valves in the closed position may cause the
compressor to fail.
a
a
a
Maintenance stop valve
To open the stop valve
1 Remove the stop valve cover.
2 Insert a hexagon wrench into the stop valve and turn the stop
valve counterclockwise.
LRMEQ+LRLEQ3+4BY1
Air-cooled refrigeration condensing unit
4P545024-1 – 2018.09
3 When the stop valve cannot be turned any further, stop turning.
4 Install the stop valve cover.
Result: The valve is now open.
To close the stop valve
1 Remove the stop valve cover.
2 Insert a hexagon wrench into the stop valve and turn the stop
valve clockwise.
3 When the stop valve cannot be turned any further, stop turning.
4 Install the stop valve cover.
Result: The valve is now closed.
To handle the stop valve cover
▪ The stop valve cover is sealed where indicated by the arrow. Do
NOT damage it.
▪ After handling the stop valve, tighten the stop valve cover
securely, and check for refrigerant leaks. For the tightening
torque, refer to the table below.
NOTICE
Thread-locking fluid. Before reattaching the stop valve
cover, apply thread-locking fluid to the screw thread (NOT
to the cover or sealing part). Otherwise, condensation
water might enter and freeze. Possible consequence:
Deformation,
refrigerant
malfunction.
a
b
b
c
a
Cover (do NOT apply thread-locking fluid)
5 Installation
leakage
and
compressor
Installation and operation manual
13
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Troubleshooting
