Daikin VRV III, Руководство по обслуживанию, Страница: 95 / 567

Test Operation SiUS34-801A_b
80 VRVIII R-410A Heat Pump 60Hz
[Shutoff valve operation procedure]
When operating the shutoff valve, use the following procedure.
Note:
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.
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>
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.
(For the tightening torque, refer to the table <Tightening Torque>.)
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.
For the tightening torque, refer to the table <Tightening Torque>.
72P type 96P type 120P/144P type
Liquid pipe shutoff
valve
φ
3/8
The 120P type / RXYQ144PTJU corresponds to the
φ
1/2 - diameter onsite piping
using the accessory pipe.
(2)
Low side equalizer
pipe shutoff valve
φ
3/4
(3)
Gas shutoff valve
φ
1
The 72P type corresponds to the
φ
3/4 - diameter onsite piping using the accessory pipe.
The 96P type corresponds to the
φ
7/8 - diameter onsite piping using the accessory pipe.
The 120P/144P type corresponds to the
φ
1-1/8 - diameter onsite piping using the accessory pipe.
(4)
High side equalizer
pipe shutoff valve
φ
3/4
Service port
fig. 28
Cap
Hex holes
Shaft (valve body)
Seal section