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7. Air-Tight Test and Additional Refrigerant Charge
7. Air-Tight Test and Additional Refrigerant Charge
7.1 Air-Tight Test
1. Check to ensure that spindles of the stop valves for gas and liquid pipes are closed completely before air-tight test.
Check the cap shape and tighten according to the torque specification as shown in the table below.
2. The refrigerant used for this outdoor unit is R410A. Use the manifold gauge and the charging hose for exclusive use of
R410A.
< Tightening Check of Stop Valves >
After connecting the pipe, remove the caps of stop valves for gas and liquid. Tighten the open-close spindle in the closing
direction according to the following tightening torque.
•
Caution for Operation of Stop Valves
1. Remove the stop valve caps before performing the air-tight test after connecting the refrigerant piping. Tighten the
spindle (valve) in clockwise direction according to the following tightening torque.
2. Perform the work after warming the spindle part with a dryer etc. when controlling the stop valve in a cold area.
(O-ring of the spindle part will harden at the low temperature and the refrigerant leakage may occur.)
3. Do not apply excessive force after fully opening the spindle. (Tightening Torque: < 5.0N-m)
(The back seat is not provided.)
4. When each valve is opened, remove tags "Close" (Accessories) and attach tags "Open" instead.
< Heat Pump >
Do NOT put two
wrenches here.
Stop Valve
for Liquid Pipe
Position both wrenches
here.
Flare Nut
< HNCCLW >
Outdoor Unit
Spindle (Valve)
(Base Unit)
Gas
Valve
8 - 12HP
14 - 18HP
22.0 - 28.0
20 - 28HP
< HNCBLW >
Outdoor Unit
Spindle (Valve)
(Base Unit)
Gas
Valve
8 - 10HP
12 - 16HP
22.0 - 28.0
18 - 22HP
< RNCCLW >
Outdoor Unit
(Base Unit)
Low Pressure
Gas Valve
8 - 12HP
14 - 18HP
22.0 - 28.0
20 - 28HP
85
Stop Valve
for Gas
Hexagonal Wrench
(To open or close
the stop valve)
O-ring
Cap
(Rubber)
Tightening Torque (N·m)
Flare Nut
Liquid
Liquid
Valve
33.0 - 42.0
7.0 - 9.0
50.0 - 62.0
9.0 - 11.0
68.0 - 84.0
Tightening Torque (N·m)
Flare Nut
Liquid
Liquid
Valve
33.0 - 42.0
7.0 - 9.0
50.0 - 62.0
9.0 - 11.0
68.0 - 84.0
Tightening Torque (N·m)
Spindle (Valve)
High/Low
Liquid
Pressure
Valve
Valve
7.0 - 9.0
22.0 - 28.0
9.0 - 11.0
Access Port
(Only the charging hose for
Cap
R410A can be connected.)
Refrigerant Pressure
Stop Valve
Counterclockwise...Open
Clockwise...............Close
Closed before Shipment
Cap
Gas
Liquid
Valve
Valve
33.0 - 42.0
42.0 - 48.0
50.0 - 62.0
Cap
Gas
Liquid
Valve
Valve
33.0 - 42.0
42.0 - 48.0
50.0 - 62.0
Flare Nut
Cap
Gas
Liquid
Liquid
Valve
Valve
33.0 - 42.0
33.0 - 42.0
50.0 - 62.0
42.0 - 48.0
68.0 - 84.0
50.0 - 62.0
< Heat Recovery >
Stop Valves for Gas Pipe
(High/Low Pressure)
Stop Valve for Gas Pipe
(Low Pressure)
Do NOT put two
wrenches here.
Stop Valve for
Liquid Pipe
Position both
Flare Nut
wrenches here.
Hexagonal Wrench
Check Joint
Gas
Liquid
Valve
Valve
9.0 - 14.0
14.0 - 18.0
Hexagonal Wrench
Check Joint
Gas
Liquid
Valve
Valve
9.0 - 14.0
14.0 - 18.0
Hexagonal Wrench Size
Check Joint
Gas
Liquid
Valve
Valve
9.0 - 14.0
14.0 - 18.0
Cap
Size
(mm)
Gas
Liquid
Valve
Valve
4
10
5
Size
(mm)
Gas
Liquid
Valve
Valve
4
10
5
(mm)
Gas
Liquid
Valve
Valve
4
10
5
A16381Z84L-rev.1
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