Daikin LREQ15B7Y1R, Installation Manual

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20B7Y1R
Air cooled refrigeration condensing unit
4P360438-1B – 2014.01
Installation manual
10
Shutoff valve sizes
Opening method
1. Remove the valve cover and turn the shaft anticlockwise with a
hexagon wrench.
2. Turn the shaft until the shaft stops.
3. 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.
2. Tighten the shaft until the shaft comes in contact with the sealing
part of the valve.
3. 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 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 9 for the tightening
torque of the cap.
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
Use the outdoor unit multi-connection piping kit (EKHRQZM) to split
up the gas piping and connect it to the different outdoor units.
CAUTION
• Only use the dedicated outdoor unit multi-connection piping kit
(EKHRQZM).
• Failire to correctly install the kit may lead to compressor damage.
• When brazing, make sure there are no flammable materials
around.
• Make sure the gas piping slants downward toward the outdoor
units.
If connected to the front
1. Connect gas side branch pipes(3) to gas side branch pipe (1).
These pipes are supplied with the outdoor unit multi-connection
piping kit.
1 Gas side branch pipe (3)
2 Gas side branch pipe (1)
3 Brazing
CAUTION
When installing gas side branch pipe (1), take the following into
account:
• Do not tilt more than 10°.
• Make sure the maximum height difference with the outdoor unit is
≤ 3 m.
• Install it horizontally.
LREQ
LREQ15-20
Liquid side shutoff
valve
Ø12.7
Gas side shutoff
valve
Ø31.8
Shutoff
valve sizes
Tightening torque N•m (closes clockwise)
Shaft (valve body) Valve cover Service port
Ø12.7 8.1~9.9
Hexagon
wrench: 4mm
18.0~22.0
11.5~13.9
Ø31.8 26.5~29.4
Hexagon
wrench: 10 mm
44.1~53.9
Service port
Valve cover
Hexagon hole
Shaft
Sealing part
Screw thread
Apply a screw lock agent
Sealing part
Not apply a screw lock agent
Shutoff valve
Part of mounting the
valve cover.
Valve cover
Sealing part
Not apply a screw
lock agent
Screw thread
Apply a screw lock
agent
Cap
1
2
3
3
1