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Do not open the 3-way valve until the piping installation is completed.
•
It is closed during shipment.
•
During installation the side panel may warp if only the fl are nut is loosened and tightened with a torque wrench. As a
result, always be sure to secure to the hexagonal part of the 3-way valve with a spanner, or other tool.
Refer to the following table for the tightening torque of the 3-way valve fl are nuts.
•
If the nuts are over tightened, they may cause the fl ares to break or leak.
Do not add additional force to the valve’s cover.
•
Using spanners on the cover or valve itself (other than the hexagonal parts) may cause gas leakage.
Avoid using spanners on the cover or parts other than the hexagonal part of the valve.
Precautions when operating the 3-way valve for piping installation
Service port
Service port
(Please use a single, open-end spanner to loosen and
tighten the liquid side 3-way valve fl are nut.)
Valve shaft
Valve cap
Valve cap
Flare nut
Spanner (Secure)
Torque wrench
Hexagonal part
of the valve
Please do not apply the
spanner in this position.
Torque
wrench
Liquid side
Gas side
Silicone sealing agent
(Ensure not to leave any holes)
During the cooling mode operation under low ambient pressure, the low
pressure side of the valve can be prone to freezing. Secure the fl are nut
(shared gas side / liquid side) section of the valve with a silicone sealing
agent to prevent this from occurring.
Gas side
Opening: Open the valve cap, pull out the knob and use
pliers etc. to turn the knob 90° counter-clockwise.
Closing: Open the valve cap, pull out the knob and use
pliers etc. to turn the knob 90° clockwise.
Liquid side
Opening: Open the valve cap and turn the Allen wrench
counter-clockwise until it stops.
Closing: Open the valve cap and turn the Allen wrench
clockwise until it stops.
•
Use an Allen wrench (Size 4 mm or 6 mm).
Direction to open
[3-way valve operation method]
Ensure not to scratch the inner surface of the valve or the end of
the valve shaft.
•
Once adjustments to the valve are completed, ensure to tighten
the valve cap according to the prescribed torque.
Precautions for handling the valve cap
Tightening torque N•m (k
g
f•m)
Gas side
20~25 (200~250)
Liquid side
17±3 (170±30)
Use a push-rod with a charge hose.
•
Once adjustments to the valve are completed, ensure to tighten the
valve cap according to the prescribed torque.
Precautions for handling the service ports
Tightening torque
11.0±1.0N•m
(110±10k
g
f•cm)
Ensure that the pipes do not come into contact with the compressor’s bolts
or exterior panel.
There is a risk of condensation from the 3-way valve coming out between the
insulation material and the indoor unit’s piping when you install the outdoor
unit above then the indoor unit. Ensure to caulk the connection parts.
Precautions for connecting the pipes
Caulking treatment, etc.
Insulation
material
Piping
Opening direction
Knob
Fully open
Fully closed
In high humidity environment, reinforce the insulation material for the refrigerant piping. Failure to do so may result in
condensation on the surface of the insulation material.
Use materials with good heat-resistant properties as the heat insulator for the pipes. Ensure to insulate both the gas side
and liquid side pipes.
If the pipes are not adequately insulated, condensation and water leakages may occur.
Ensure that the current insulation covers the pipes up to the unit’s connecting part.
If the piping is exposed, it may cause condensation or burn (when touch the pipe).
Precautions for insulation installation
Maximum temperature limit of gas or liquid piping exceeds 120 °C
Application for ether-based oil
Dimensions when adding fl are nuts and the tightening torque
Precautions for flare nut installation
Piping size
Tightening torque
Flare section dimensions A
Flare confi guration
ø 6.35
14.0N•m ~ 18.0N•
m
(140k
g
f•cm ~ 180k
g
f•cm)
8.7 ~ 9.
1
90° ± 2°
45° ±1°
ø 9.52
34.0N•m ~ 42.0N•
m
(340k
g
f•cm ~ 420k
g
f•cm)
12.8 ~ 13.2
ø 12.7
49.0N•m ~ 55.0N•m
(500k
g
f•cm ~ 560k
g
f•cm)
16.2 ~ 16.6
ø 15.88
68.0N•m ~ 82.0N•
m
(690k
g
f•cm ~ 830k
g
f•cm)
19.3 ~ 19.7
ø 19.05
100N•m ~ 120N•m
(1020k
g
f•cm ~ 1220
k
g
f•cm)
23.6 ~ 24.0
After piping connection has completed, ensure there is no gas leakage.
When tightening the fl are nut, coat the fl ares (inner surface only) with refrigerant oil on the
fl ares
Firstly, screw in 3-4 turns by hand.
* Ensure not to get oil on the screw part.
Refrigerant oil used is ether-based.
Once the piping connections are completed, perform leakage inspection using nitrogen gas.
SM830252-01_欧州_Single_8・10HP_TD_SM.indb 45
16/10/14 13:57:18
AMP Air Conditioning
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