Daikin LREQ-BY1 Installation Manual page 13

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
5 6
Liquid side
shutoff valve
Gas side
Ø19.1
shutoff valve
Sealing part
Tightening torque N•m (closes clockwise)
Shutoff
valve sizes
Shaft (valve body)
Ø9.5 5.4~6.5
wrench: 4mm
Ø12.7 8.1~9.9
Ø19.1
27.0~33.0
wrench: 8 mm
Ø25.4
Ø31.8 26.5~29.4
wrench: 10 mm
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 9
the tightening torque of the valve.
Valve cover
Sealing part
Not apply a screw lock agent
LREQ5~20B7Y1
Air cooled refrigeration condensing unit
4PW74302-1D – 2016.11
LREQ
8 10 12 15
Ø9.5 Ø12.7
Ø25.4 Ø31.8
Service port
Valve cover
Hexagon hole
Shaft
Valve cover Service port
13.5~16.5
Hexagon
18.0~22.0
Hexagon
11.5~13.9
22.5~27.5
Hexagon
44.1~53.9
Screw thread
Apply a screw lock agent
Shutoff valve
Part of mounting the
valve cover.
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
20
"Operation Method of Shutoff Valves" on page 9
torque of the cap.
Sealing part
Not apply a screw
lock agent
CAUTION
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.
LREQ5~12
Gas side shutoff valve
Gas side
accessory pipe (1)
LREQ15, LREQ20
Liquid side
shutoff valve
Brazing
Liquid side
accessory pipe (1)
for
Cap
Screw thread
Apply a screw lock
agent
Liquid side shutoff valve
Brazing
Brazing
Liquid side
accessory pipe (1)
Gas side
shutoff valve
Brazing
Gas side
accessory pipe (1)
for the tightening
Installation manual
10