Daikin VRV III RXYQ5-54PY1 Service Manual page 160

Si34-601A
[Shutoff Valve Operation Procedure]
When operating the shutoff valve, follow the procedure instructed below.
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 side
shutoff valve
Gas side
shutoff valve
<Tightening torque>
Shutoff valve size
[To open]
1. Remove the cap and turn the shaft counterclockwise with the hexagon wrench (JISB4648).
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 (JISB4648).
2. Securely tighten the valve until the shaft contacts the main body seal.
3. Make sure to tighten the cap securely.
Test Operation
Do not open the shutoff valve until "1.2.1 Check work prior to turn power supply on" in page
145 are completed. If the shutoff valve is left open without turning on the power, it may cause
refrigerant to buildup in the compressor, leading insulation degradation.
Be sure to use the correct tools.
The shutoff valve is not a back-seat type. If forced it to 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.
5HP type 8HP type
The 12HP type corresponds to the 12.7-diameter
onsite piping using the included piping.
φ 15.9 φ 19.1
Shaft (valve body)
φ 9.5
5.4 - 6.6
φ 12.7
8.1 - 9.9
φ 15.9
13.5 - 16.5
φ 19.1
27.0 - 33.0
φ 25.4
(For the tightening torque, refer to the item <Tightening Torque>.)
(For the tightening torque, refer to the item <Tightening Torque>.)
10HP type 12HP type 14HP type 16HP type 18HP type
φ 9.5
The 10HP type corresponds to the
22.2-diameter onsite piping using the accessory pipe.
The 12 ~ 18HP type corresponds to the 28.6-diameter onsite
piping using the accessory pipe.
Tightening torque N·m (Turn clockwise to close)
Hexagonal wrench
4 mm
Hexagonal wrench
6 mm
Hexagonal wrench
8 mm
Service port
Cap
Seal section
Hex holes
Shaft (valve body)
fig 34
Test Operation
φ 12.7
The 18HP type corresponds to the
15.9-diameter onsite piping using the
accessory pipe.
φ 25.4
Cap
Service port
(valve lid)
13.5 - 16.5
18.0 - 22.0
11.5 - 13.9
22.5 - 27.5
149