Electrical Connection - Toshiba MMD-AP0726HP-E Installation Manual

Refrigerant amount to be added
For addition of the refrigerant, add refrigerant "R410A"
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.
Open the valve fully
Open the valve of the outdoor unit fully. A 4 mm-
hexagonal wrench is required for opening the valve of
liquid side.
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 (R410A, R134a).
29-EN
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.
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
of the pipe
Union Banding band
(locally
Heat insulation
procured)
pipe
(Accessory)
– 15 –
8

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.
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
If incorrect/incomplete wiring is carried out, it will
cause an electrical fi re or smoke.
Use the cord clamps attached to the product.
Do not damage or scratch the conductive
core and inner insulator of power and system
interconnection wires when peeling them.
Use the power cord and system interconnection
wire of specifi ed thickness, type, and protective
devices required.
Do not connect 208 V – 240 V power to the
terminal blocks ( , , , ) for control wiring.
U U A B
1 2
(Otherwise, the system will fail.)
Do not connect 208 V – 240 V power to the
terminal blocks ( , ) for Flow Selector Unit
3 4
wiring. (Otherwise, the system will fail.)
Do not contact the electric wiring with the high-
temperature part of the pipe. It causes the coating
melted.
REQUIREMENT
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 control wiring
line in the same line.
Do not turn on the power of the indoor unit until
the refrigerant pipes are vacuumed.
Power supply wire and
communication wires
specifications
Power supply wire and communication wires are
procured locally.
For the power supply specifications, follow to the
following table. If capacity is little, it is dangerous
because overheat or burnout may be caused.
For specifications of the power capacity of the outdoor
unit and the power supply wires, refer to the
Installation Manual attached to the outdoor unit.
Indoor unit power supply
For the power supply of the indoor unit, prepare the
exclusive power supply separated from that of the
outdoor unit.
Arrange the power supply, circuit breaker, and main
switch of the indoor unit connected to the same
outdoor unit so that they are commonly used.
Power supply wire specification: Cable 3-core
2.5 mm², in conformity with Design 60245 IEC 57.
30-EN