Fujitsu AIRSTAGE J-II Design & Technical Manual page 475

In the case of AJ  A54LALH
● It is necessary to change a connection pipe diameter by using Reducer.
(1) Reducer must be brazed outside of the outdoor unit.
(2) Distance between 3-Way-Valve and Reducer ≤ 1m
(3) The part of Reducer do insulation processing after brazing .
Connection pipe (Gas)
(Pipe outside dia.:19.05mm (3/4 in.))
Handling precautions for the valves
z „
● Mounted part of Blank cap is sealed for protection.
● Fasten blank cap tightly after opening valves.
Blank cap
[mm (in.)]
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
Operating the valves
● Use a hexagon wrench (size 4 mm).
● Opening (1) Insert the hexagon wrench into the valve shaft, and turn it counterclockwise.
(2) Stop turning when the valve shaft can no longer be turned. (Open position)
● Closing (1) Insert the hexagon wrench into the valve shaft, and turn it clockwise.
(2) Stop turning when the valve shaft can no longer be turned. (Closed position)
Opening direction
Opening direction
Liquid pipe
Brazing
1m or less
Connection pipe (Gas)
(Pipe outside dia.:15.88mm (5/8 in.))
Reducer
(accessory)
Example. Case of front connection
Tightening torque
[N·m]
20 to 25
20 to 25
25 to 30
30 to 35
35 to 40
Hexagon wrench
Seal (blank cap installation portion)
Gas pipe
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