Daikin RXYQ96PYDN Service Manual page 95

Test Operation
[Shutoff valve operation procedure]
When operating the shutoff valve, use the following procedure.
Note:
Tightening torque
The sizes of the shutoff valves on each model and the tightening torque for each size are listed in
the table below.
<Size of Shutoff Valve>
Liquid pipe shutoff
valve
Low side equalizer
pipe shutoff valve
Gas shutoff valve
High side equalizer
pipe shutoff valve
To open
1. Remove the cap and turn the shaft counterclockwise with the hexagon wrench.
2. Turn it until the shaft stops.
3. Make sure to tighten the cap securely.
To close
1. Remove the cap and turn the shaft clockwise with the hexagon wrench.
2. Securely tighten the valve until the shaft contacts the main body seal.
3. Make sure to tighten the cap securely.
80
Do not open the shutoff valve until 10.2.1 Check Work Prior to Turn Power Supply On is
completed. If the shutoff valve is left open without turning on the power, it may cause refrigerant
to buildup in the compressor, leading to insulation degradation.
Be sure to use the correct tools.
The shutoff valve is not a back-seat type. If forced open, it might break the valve body.
When using a service port, use the charge hose.
After tightening the cap, make sure no refrigerant gas is leaking.
The 120P type / RXYQ144PTJU corresponds to the φ1/2 - diameter onsite piping
using the accessory pipe.
(2)
The 72P type corresponds to the φ3/4 - diameter onsite piping using the accessory pipe.
(3)
The 96P type corresponds to the φ7/8 - diameter onsite piping using the accessory pipe.
The 120P/144P type corresponds to the φ1-1/8 - diameter onsite piping using the accessory pipe.
(4)
(For the tightening torque, refer to the table <Tightening Torque>.)
For the tightening torque, refer to the table <Tightening Torque>.
72P type
Service port
Seal section
Shaft (valve body)
fig. 28
96P type 120P/144P type
φ3/8
φ3/4
φ1
φ3/4
Cap
Hex holes
VRVIII R-410A Heat Pump 60Hz
SiUS34-801A_b