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Idiomas disponibles
Idiomas disponibles
Use the tightening torque levels as listed in the
•
following table.
Outer dia. of connecting
Tightening torque (N • m)
pipe (mm)
6.4
14 to 18 (1.4 to 1.8 kgf•m)
9.5
34 to 42 (3.4 to 4.2 kgf•m)
12.7
49 to 61 (4.9 to 6.1 kgf•m)
15.9
63 to 77 (6.3 to 7.7 kgf•m)
Tightening torque of flare pipe connections
Incorrect connections may cause not only a gas
leak, but also a trouble of the refrigeration cycle.
Align the centres of the connecting pipes and
tighten the flare nut as far as possible with your
fingers. Then tighten the nut with a spanner and
torque wrench as shown in the figure.
CAUTION
Tightening with an excessive torque may crack the nut
depending on installation conditions.
Evacuation
Perform vacuuming from the charge port of valve of
the outdoor unit by using a vacuum pump.
For details, follow to the Installation Manual attached
to the outdoor unit.
Do not use the refrigerant sealed in the outdoor unit
•
for evacuation.
REQUIREMENT
For the tools such as charge hose, use those
manufactured exclusively for R32.
Refrigerant amount to be added
For addition of the refrigerant, add refrigerant "R32"
referring to the attached Installation Manual of
outdoor unit.
Use a scale to charge the refrigerant of specified
amount.
REQUIREMENT
Charging an excessive or too little amount of
•
refrigerant causes a trouble of the compressor.
Charge the refrigerant of specified amount.
A personnel who charged the refrigerant should
•
write down the pipe length and the added refrigerant
amount in the F-GAS label of the outdoor unit. It is
necessary to fix the compressor and refrigeration
cycle malfunction.
115-EN
Open the valve fully
Open the valve of the outdoor unit fully. A 4 mm-
hexagonal wrench is required for opening the valve.
For details, refer to the Installation Manual attached to
the outdoor unit.
Gas leak check
Check with a leak detector or soap water whether gas
leaks or not, from the pipe connecting section or cap
of the valve.
REQUIREMENT
Use a leak detector manufactured exclusively for HFC
refrigerant (R32, R134a, R410A, etc).
Heat insulation process
Apply heat insulation for the pipes separately at liquid
side and gas side.
For the heat insulation to the pipes at gas side, use
•
the material with heat-resisting temperature 120 °C
or higher.
To use the attached heat insulation pipe, apply the
•
heat insulation to the pipe connecting section of the
indoor unit securely without gap.
REQUIREMENT
Apply the heat insulation to the pipe connecting
•
section of the indoor unit securely up to the root
without exposure of the pipe. (The pipe exposed to
the outside causes water leak.)
Wrap heat insulator with its slits facing up
•
(ceiling side).
Wrap the pipe with the attached heat insulator
without any gap between the indoor unit.
The seam must be faced upward
Indoor unit
(ceiling side).
Flare nut
Heat insulator
Heat insulation
of the pipe
Union
Banding band
pipe
(locally
(Accessory)
procured)
7
Electrical connection
WARNING
•
Use the specified wires for wiring connect the terminals. Securely fix them to prevent external forces applied
to the terminals from affecting the terminals.
Incomplete connection or fixation may cause a fire or other trouble.
•
Connect earth wire. (grounding work)
Incomplete grounding cause an electric shock.
Do not connect earth wires to gas pipes, water pipes, lightning conductor or telephone earth wires.
•
Connect earth wire. (grounding work)
Capacity shortage of power circuit or incomplete installation may cause an electric shock or a fire.
CAUTION
•
For power supply specifications, follow the Installation Manual of outdoor unit.
•
Do not connect 220 – 240V power to the terminal blocks ( A , B ) for control wiring.
Otherwise, the system will fail.
•
Do not damage or scratch the conductive core and inner insulator of power and system interconnection wires during
peeling them.
•
Perform the electric wiring so that it does not come to contact with the high-temperature part of the pipe.
The coating may melt resulting in an accident.
•
Do not turn on the power of the indoor unit until vacuuming of the refrigerant pipes completes.
System interconnection wires specifications
System
4 x 1.5 mm
or more
2
interconnection
(H07RN-F or 60245 IEC 66)
wires*
*Number of wire x wire size
Remote controller wiring
Remote controller wiring, remote controller inter-unit
wiring
Total wire length of remote controller wiring and
remote controller inter-unit wiring
= L + L1 + L2 + ... Ln
Total wire length of remote controller inter-unit wiring = L1 + L2 + ... Ln
CAUTION
The remote controller wire and system interconnection wires cannot be parallel to contact each other and cannot be
stored in the same conduits. If doing so, a trouble may be caused on the control system due to noise or other factor.
Indoor unit
Remote
L
controller
L1
wiring
Remote
controller
– 58 –
Up to
70 m
Wire size: 2 × 0.5 to 2.0 mm
2
In case of wired type only
In case of wireless type
included
Indoor unit
Indoor unit
L2
Ln
(Max. 8 units)
Remote controller inter-unit wiring
Up to 500 m
Up to 400 m
Up to 200 m
Indoor unit
EN
116-EN
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