Electrical Work - Toshiba RAS-M13PKVP-E Service Manual

Insulating the pipes
• Insulate the pipes separately for the liquid side and
gas side.
Refrigerant piping covered with insulating
material (polyethylene form, 6 mm thick).
In case the duct-type or cassette-type unit
is to be installed, it shall be covered with
thicker insulating material (polyethylene
form, 10 mm thick).
Fig. 10-5-13
When installing additional indoor units at a
later date
1. Set the circuit breaker to the "off" position.
2. Follow the same procedure starting with the
"REFRIGERANT PIPING" item on the previous
page, and install the additional indoor unit or
units.
Pump-down operation (recovering
refrigerant)
Undertake the steps described below in each of the
two rooms.
1. Open the service valve cover of the outdoor unit.
2. Connect the charge hose to the service port.
3. Turn on the unit.
4. Set the all connected indoor units to COOL mode
and start the operation.
5. Wait until at least 10 minutes have elapsed since
operation was started, and then close the valve
of the service valve at the liquid side.
6. Confi rm that the compound pressure gauge
reading is –101 kPa (–76 cmHg).
7. Close the valve of the service valve at the gas
side.
8. Turn off the unit.
9. Disconnect the connection pipes at both liquid
and gas side.
In a pump-down operation, be sure to take the
following steps.
- Ensure that no air is allowed to enter inside the
refrigeration cycle.
- After having closed the two service valves,
shut down the compressor, and then remove
the refrigerant pipe.
If removing the refrigerant pipe while the
compressor is operating with the service
valve opened, it may cause air suction and
overpressure inside the refrigeration cycle,
resulting in burst of the unit or injury.

10-5-3. Electrical work

• Be sure to comply with local regulations/codes
when running the wire from outdoor unit to
indoor unit.
(Size of wire and wiring method etc.)
• Capacity shortages of the power circuit or an
incomplete installation may cause an electric
shock or fi re.
• Ensure that all terminals are securely fi xed
using the specifi ed cables, so preventing any
external forces having a negative effect on the
terminals.
• Improper connection or fi xing may cause a fi re.
• Be sure to connect earth wire (grounding
work).
• Incomplete grounding cause an electric shock.
• Use a circuit breaker of a type that is not
tripped by shock waves.
• Incorrect/incomplete wiring will cause electrical
fi res or smoke.
• Prepare the power source for exclusive use
with the air conditioner.
• This product can be connected to the main
power.
Fixed wire connections:
A switch that disconnects all poles and has a
contact separation of at least 3mm must be
incorporated in the fi xed wiring.
– 67 –
CAUTION
WARNING
CAUTION