Installation manual
9
LREQ5~20B7Y1
Air cooled refrigeration condensing unit
4PW74302-1 – 2012.06
Tightening torque
Check with the following table the sizes of shutoff valves incorporated
by each model and the tightening torque values of the respective
shutoff valves.
Shutoff valve sizes
Opening method
1. Remove the valve cover and turn the shaft anticlockwise with a
hexagon wrench.
(1) Turn the shaft until the shaft stops.
(2) Tighten the valve cover securely. Refer to the above table for the
tightening torque according to the size.
Closing method
1. Remove the valve cover and turn the shaft clockwise with a hexa-
gon wrench.
(3) Tighten the shaft until the shaft comes in contact with the sealing
part of the valve.
(4) Tighten the valve cover securely. Refer to the above table for the
tightening torque according to the size.
Handling precautions for valve cover
• Be careful not to damage the sealing part.
• At the time of mounting the valve cover, apply a screw lock agent to
the screw thread.
• Do not apply a screw lock agent (for flare nut use) to the sealing
part.
• Be sure to tighten the valve cover securely after operating the
valve. Refer to "Operation Method of Shutoff Valves" on page 8 for
the tightening torque of the valve.
Handling Precautions for Service Port
• Work on the service port with a charge hose provided with a
pushing rod.
• At the time of mounting the cap, apply a screw lock agent to the
screw thread.
• Do not apply a screw lock agent (for flare nut use) to the sealing
part.
•
Be sure to tighten the cap securely after the work. Refer to
"Operation Method of Shutoff Valves" on page 8 for the tightening
torque of the cap.
Apply a screw lock agent to the valve cover mount and the screw
thread of the service port.
Otherwise, dew condensation water will intrude inside and freeze.
Therefore, refrigerant gas leakage or a compressor malfunction may
result from the cap deformation or damage.
3. Connecting refrigerant piping to outdoor units
If connected to the front
Remove the shutoff valve cover to connect.
LREQ
5 6 8 10 12 15 20
Liquid side
shutoff valve
Ø9.5 Ø12.7
Gas side
shutoff valve
Ø19.1 Ø25.4 Ø31.8
Shutoff
valve sizes
Tightening torque N•m (closes clockwise)
Shaft (valve body) Valve cover Service port
Ø9.5 5.4~6.5
Hexagon
wrench: 4mm
13.5~16.5
11.5~13.9
Ø12.7 8.1~9.9 18.0~22.0
Ø19.1
27.0~33.0
Hexagon
wrench: 8 mm
22.5~27.5
Ø25.4
Ø31.8 26.5~29.4
Hexagon
wrench: 10 mm
44.1~53.9
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