Earthing; Finishing; Test Run; Annual Maintenance - Toshiba RAV-SM304ATP-E Installation Manual

How to wire
1. Remove the valve cover from the outdoor unit.
2. Connect the power supply wires and system interconnection wires to the terminal block of the electrical control
box.
3. Tighten the screws of the terminal block, connect the wires matching the terminal numbers (Do not apply tension
to the connecting section of the terminal block.)
4. Attach the terminal cover.
• When connecting the system interconnection wire to the outdoor unit terminal, prevent water from coming into
the outdoor unit.
• Insulate the unsheathed cords (conductors) with electrical insulation tape. Process them so that they do not
touch any electrical or metal parts.
• For system interconnection wires, do not use a wire joined to another on the way.
Use wires long enough to cover the entire length.
Screw
Connecting wire
Stripping length power cord and connecting wire
10
40
Earth wire
System
interconnection wire
23-EN
Terminal block
Power wire
1 2 3 10
L N
10 10
40
30 30
Earth wire
(mm)
Power supply wire
8

Earthing

WARNING
Be sure to connect the earth wire. (grounding work)
Incomplete grounding may cause an electric shock.
Connect the earth wire properly following applicable technical standards.
Connecting the earth wire is essential to preventing electric shock and to reducing noise and electrical charges on
the outdoor unit surface due to the high-frequency wave generated by the frequency converter (inverter) in the
outdoor unit.
If you touch the charged outdoor unit without an earth wire, you may experience an electric shock.
9

Finishing

After the refrigerant pipe, inter-unit wires, and drain pipe have been connected, cover them with finishing tape and
clamp them to the wall with off-the-shelf support brackets or their equivalent.
Keep the power wires and system interconnection wires off the valve on the gas side or pipes that have no heat
insulator.
10

Test run

• Turn on the leakage breaker at least 12 hours before starting a test run to protect the compressor during
startup.
To protect the compressor, power is supplied from the 220-240 VAC input to the unit to preheat the compressor.
• Check the following before starting a test run:
• That all pipes are connected securely without leaks.
• That the valve is open.
If the compressor is operated with the valve closed, the outdoor unit will become overpressurized, which may
damage the compressor or other components.
If there is a leak at a connection, air can be sucked in and the internal pressure further increases, which may
cause a burst or injury.
• Operate the air conditioner in the correct procedure as specifi ed in the Owner's Manual.
11

Annual maintenance

For an air conditioning system that is operated on a regular basis, cleaning and maintenance of the indoor / outdoor
units are strongly recommended.
As a general rule, if an indoor unit is operated for about 8 hours daily, the indoor / outdoor units will need to be
cleaned at least once every 3 months. This cleaning and maintenance should be carried out by a qualified service
person.
Failure to clean the indoor / outdoor units regularly will result in poor performance, icing, water leaking and even
compressor failure.
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24-EN