Guidelines For Handling Stop Valve - Daikin ERSQ011AAV1 Installation Manual

Not recommended, but in case of emergency
Should you be forced to connect the piping without a torque
wrench, follow the following installation method:
Tighten the flare nut using a spanner until the tightening
torque suddenly increases.
From that position further tighten the flare nut the angle listed
below:
Piping size Further tightening
(mm) angle (degrees)
Ø9.5
Ø15.9

6.3. Guidelines for handling stop valve

Cautions on handling the stop valve
Make sure to keep both stop valves open during operation.
The figure below shows the name of each part required in
handling the stop valve.
1
2
3
4
The stop valve is factory closed.
Do not apply excessive force to the stop valve. Doing so may
break the valve body.
Since the stop valve mounting plate may be deformed if only a
torque wrench is used to loosen or tighten the flare nut, always
make sure to secure the stop valve with a spanner, then loosen
or tighten the flare nut with a torque wrench.
Do not place the spanner on the stop valve cover, as this could
cause a refrigerant leak.
The operating pressure at the refrigerant side can be low (for
example, heating operation when outdoor temperature is low),
sufficiently seal the flare nut in the stop valve on the gas line with
silicon sealant to prevent freezing.
ERSQ+ERRQ011~016AAV1+Y1
Outdoor unit for air to water heat pump
4PW49635-1A
Recommended arm
length of spanner (mm)
60~90 ±200
30~60 ±300
1 Service port and service port cover
2 Stop valve
3 Field piping connection
4 Stop valve cover
1 Spanner
2 Torque wrench
1
2
Silicon sealing pad
(Make sure there is no gap)
Opening/closing the stop valve
Opening the stop valve
1. Remove the valve cover.
2. Insert a hexagon wrench (liquid side: 4 mm/gas side: 6 mm) into
the stop valve and turn the stop valve counterclockwise.
3. When the stop valve cannot be turned any further, stop turning.
The valve is now open.
Closing the stop valve
1. Remove the valve cover.
2. Insert a hexagon wrench (liquid side: 4 mm/gas side: 6 mm) into
the stop valve and turn the stop valve clockwise.
3. When the stop valve cannot be turned any further, stop turning.
The valve is now closed.
Closing direction
Liquid side
Cautions on handling the stop valve cover
The stop valve cover is sealed
where indicated by the arrow. Take
care not to damage it.
After handling the stop valve, make
sure to tighten the stop valve cover
securely. For the tightening torque,
refer to the table below.
Check for refrigerant leaks after tightening the stop valve cover.
Cautions on handling 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.
Tightening torques
Item
Stop valve cover, liquid side
Stop valve cover, gas side
Service port cover
Gas side
Tightening torque (N•m)
13.5~16.5
22.5~27.5
11.5~13.9
Installation manual
8