5 Installation
Installation and operation manual
11
4BY1
Air-cooled refrigeration condensing unit
4P495373-1 – 2017.07
1
2
3
4
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.
Result:
The valve is now closed.
Closing direction:
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
leakage
and
compressor
malfunction.
a
b
b
c
a
Cover (do NOT apply thread-locking fluid)
b
Sealing part (do NOT apply thread-locking fluid)
c
Screw thread with thread-locking fluid
To handle the service port
▪ Always use a charge hose equipped with a valve depressor pin,
since the service port is a Schrader type valve.
▪ After handling the service port, make sure to tighten the service
port cover securely. For the tightening torque, refer to the table
below.
▪ Check for refrigerant leaks after tightening the service port cover.
NOTICE
Thread-locking fluid
. Before reattaching the service port
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
leakage
and
compressor
malfunction.
c
b
a
a
Cover (do NOT apply thread-locking fluid)
b
Sealing part (do NOT apply thread-locking fluid)
c
Screw thread with thread-locking fluid
Tightening torques
Stop valve
size (mm)
Tightening torque N•m (turn clockwise to close)
Shaft
Valve body Hexagonal
wrench
Cap (valve
lid)
Service
port
Ø9.5
5.4~6.6
4 mm
13.5~16.5
11.5~13.9
Ø15.9
13.5~16.5
6 mm
22.5~27.5
5.3.2
To remove the pinched pipes
WARNING
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
Failure to observe the instructions in procedure below
properly may result in property damage or personal injury,
which may be serious depending on the circumstances.
Use the following procedure to remove the pinched piping:
1
Remove the valve cover and make sure that the stop valves are
fully closed.
c
d
a
b
a
Service port and service port cover
b
Stop valve
c
Field piping connection
d
Stop valve cover
2
Connect the vacuuming/recovery unit through a manifold to the
service port of all stop valves.
p< p>
R410A
N2
b
c
e
a
f
g
d
A
B
a
Pressure reducing valve
b
Nitrogen
c
Weighing scales
d
Refrigerant R410A tank (siphon system)
e
Vacuum pump
f
Liquid line stop valve
g
Gas line stop valve
A
Valve A
B
Valve B
Summary of Contents for LRMEQ3BY1
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