Publicidad
Idiomas disponibles
Idiomas disponibles
Use the tightening torque levels as listed in the
following table.
Outer dia. of
Tightening torque
connecting pipe
(inch (mm))
1/4 (6.4)
10.1 to 13.0 (14 to 18)
3/8 (9.5)
24.6 to 30.4 (34 to 42)
Tightening torque of flare pipe connections.
Pressure of R410A is higher than that of R22.
(Approx. 1.6 times) Therefore, using a torque
wrench, tighten the flare pipe connecting sections
which connect the indoor and outdoor units of the
specified tightening torque.
Incorrect connections may cause not only a gas
leak, but also an issue with the refrigeration cycle.
Tightening with an excessive torque may crack the
nut depending on installation conditions.
Piping with outdoor unit
Shape of valve differs according to the outdoor unit.
For details of installation, refer to the Installation
Manual of the outdoor unit.
25-EN
Air purge, etc.
For airtight test, air purge, addition of refrigerant,
and gas leak check, refer to the Installation Manual
attached to the outdoor unit.
Do not supply power to the indoor unit until the
airtight test and vacuuming are completed.
(If the indoor unit is powered on, the pulse motor
valve is fully closed, which extends the time for
vacuuming.)
Open the valve of the outdoor unit fully.
For details, refer to the Installation Manual attached to
the outdoor unit.
Apply insulation for the pipes separately at liquid side
and gas side.
For the insulation to the pipes at gas side, be sure to
use the material with heat-resisting temperature 248°F
(120°C) or higher.
Using the attached insulation material, apply the
insulation to the pipe connecting section of the
indoor unit securely without gap.
Apply the 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 insulation with its slits facing up (ceiling side).
Wrap the pipe with the attached insulation
without any gap between the indoor unit.
The seam must be faced upward
Indoor unit
(ceiling side).
Flare nut
Insulation
of the pipe
Insulation pipe
Banding band
(Accessory)
(Locally procured)
Union
– 13 –
7
W
fi
Incomplete connection or fixation may cause a fire or other trouble.
Connect grounding wire. (grounding work)
Incomplete grounding cause an electric shock.
Do not connect grounding wires to gas pipes, water pipes, lightning conductor or telephone grounding wires.
Capacity shortage of power circuit or incomplete installation may cause an electric shock or a fire.
Consult local building codes, NEC (National Electrical Code) or CEC (Canadian Electrical Code) for special
requirements.
If incorrect / incomplete wiring is carried out, it will cause an electrical fire or smoke.
Install an earth leakage breaker that is not tripped by shock waves.
If an earth leakage breaker is not installed, an electric shock may be caused.
Use the cord clamps attached to the product.
Do not damage or scratch the conductive core and inner insulator of power and control wires when peeling
them.
Use the power supply wire and control wires of specified thickness, type, and protective devices required.
Do not connect 208/230V power to the terminal blocks (Uv (U1)), (Uv (U2)), (A), (B) for control wiring.
(Otherwise, the system will fail.)
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 circuit breaker of the indoor unit until vacuuming of the refrigerant pipes completes.
For power supply wiring, strictly conform to the Local Regulation in each country.
For wiring of power supply of the outdoor units, follow the Installation Manual of each outdoor unit.
After connecting wires to the terminal blocks, provide a trap and fix wires with the cord clamp.
Run the refrigerant piping line and communication line in the same line.
Do not turn on the power of the indoor unit until vacuuming of the refrigerant pipes completes.
fi
26-EN
Publicidad
