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2.
Once the appropriate amount of refrigerant is in, press the
confi rmation button (BS3) on the outdoor unit PC board
(A2P), and stop operation.
3.
Open the stop valves quickly (both liquid and gas line
valves).
(This must be done quickly to avoid the possibility that the
pipe might burst.)
Stop valve operation
Cautions on handling the stop valve
•
The fi gure below shows the name of each part required in
handling the stop valve. At the time of shipment, the stop
valve is closed.
Service port
Valve stem
Valve cap
Field piping
connection part
•
If only a torque wrench is used to loosen or tighten the fl are
nut, the side plate may be distorted. Make sure to fi x the
stop valve with a spanner, then loosen or tighten the fl are
nut with a torque wrench.
Spanner prohibition
Stop valve of two
to valve cap and
hangs structure
body part
•
When it is expected that the operating pressure will be low
(for example, when cooling will be performed while the
outside air temperature is low), seal suffi ciently the fl are nut
in the stop valve on the gas line with silicon sealant to
prevent freezing.
Cautions on handling the valve cap
•
The valve is sealed in the arrow area. Take care not to
damage the arrow area.
Valve cap
•
After handling the valve, make sure to tighten the valve cap
securely.
Liquid line
Gas line
10.0~12.2 ft·lbf
16.6~20.3 ft·lbf
English
Silicon sealant
(Take care not to generate cavity.)
Torque
Spanner
wrench
Torque
wrench
Stop valve of one
hang structure
Stop valve
(valve cap attachment area)
Cautions on handling the service port
•
Use charge hose equipped with push in the work.
•
After the work, make sure to tighten the valve cap securely.
Tightening torque.....8.5~10.3 ft·lbf
[Stop valve operation method]
Prepare hexagon wrenches (whose size is 4 mm and 6 mm).
How to open the stop valve
1.
Insert a hexagon wrench into the valve stem, and turn the
valve stem counterclockwise.
2.
When the valve stem cannot be turned any more, stop
turning. Now, the valve is open.
How to close the stop valve
1.
Insert a hexagon wrench into the valve stem, and turn the
valve stem clockwise.
2.
When the valve stem cannot be turned any more, stop
turning. Now, the valve is closed.
Opening direction
<Liquid line>
7.
ELECTRIC WIRING WORK
DANGER
•
Do not ground units to water pipes, telephone wires or
lightning rods because incomplete grounding could cause a
severe shock hazard resulting in severe injury or death, and
to gas pipes because a gas leak could result in an explosion
which could lead to severe injury or death.
WARNING
•
Disconnect all power to unit to avoid possible electric shock
during installation.
•
Use only specifi ed wire and connect wires to terminals
tightly. Be careful that wires do not place external stress on
terminals. Keep wires in neat order so as to not to obstruct
other equipment. Incomplete connections could result in
overheating, and in worse cases, electric shock or fi re.
For the details, refer to "7-3 Power supply wiring connec-
tion procedure".
CAUTION
<To electrician>
•
Do not operate the air conditioner until the refrigerant piping
work is completed.
(Operating the air conditioner before the refrigerant piping
work is completed may damage the compressor.)
•
Install a ground fault circuit interrupter.
(The inverter is provided in the air conditioner. In order to
prevent malfunction of the ground fault circuit interrupter
itself, use a breaker resistant to higher harmonics.)
Opening direction
<Gas line>
12
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