Table of Contents
Advertisement
„ Airtight test / 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.
REQUIREMENT
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.)
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,
be sure to use the material with heat-resisting
temperature 120°C or higher.
Using the attached heat insulation material, apply the
heat insulation to the pipe connecting section of the
indoor unit securely without gap.
REQUIREMENT
y 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.)
y Wrap heat insulator with its slits facing up (ceiling
side).
27-EN
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
of the pipe
Heat insulation
pipe (Accessory)
Banding band
(Locally procured)
Union
7
Electrical connection
WARNING
y Use the specified wires for wiring connection to 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.
y Connect earth wire. (grounding work)
Incomplete earthing cause an electric shock.
Do not connect earth wires to gas pipes, water pipes, lightning conductor or telephone earth wires.
y Appliance shall be installed in accordance with national wiring regulations.
Capacity shortage of power circuit or incomplete installation may cause an electric shock or a fire.
CAUTION
y The wire size and wire length of the communication line differs depending on the outdoor unit series
to be connected.
y If incorrect / incomplete wiring is carried out, it will cause an electrical fire or smoke.
y 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.
y Use the cord clamps attached to the product.
y Do not damage or scratch the conductive core and inner insulator of power and control wires when peeling
them.
y Use the power supply wire and control wires of specified thickness, type, and protective devices required.
y Do not connect 208 to 240V power to the terminal blocks (Uv (U1)), (Uv (U2)), (A), (B) for control wiring.
(Otherwise, the system will fail.)
y 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.
y Be careful of fan operation when the circuit breaker is turned on. When the leak detector is connected in
combination with the R32 outdoor unit, if the refrigerant leak detection sensor detects the refrigerant leak, a fan
automatically rotates even while an air conditioner stops. Be careful not to be injured by the fan.
REQUIREMENT
y For power supply wiring, strictly conform to the Local Regulation in each country.
y For wiring of power supply of the outdoor units, follow the Installation Manual of each outdoor unit.
y After connecting wires to the terminal blocks, provide a trap and fix wires with the cord clamp.
y Run the refrigerant piping line and communication line in the same line.
y Do not turn on the power of the indoor unit until vacuuming of the refrigerant pipes completes.
– 14 –
28-EN
Advertisement
Table of Contents
