Earthing; Finishing; Test Run; Annual Maintenance - Toshiba RAS-24N3KCV1 Installation Manual

To Indoor unit
terminal block
1 2 3
Earth screw
Pipe valve fi xing plate
Connecting wire
Stripping length power cord and connecting wire
10 1 2 3
10
50
(mm)
Earth line
Connecting wire
CAUTION
• An installation fuse must be used for the power supply line of this air
conditioner.
• Incorrect/incomplete wiring may lead to an electrical fi re or smoke.
• Prepare an exclusive power supply for the air conditioner.
• This product can be connected to the mains power.
Fixed wire connections :
A switch that disconnects all poles and has a contact separation of at
least 3 mm must be incorporated in the fi xed wiring.

Earthing

WARNING
• Be sure to connect the earth wire. (grounding work)
Incomplete grounding may cause an electric shock.
Connect the earth line properly following applicable technical standards.
Connecting the earth line 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 line, you may
experience an electric shock.

Finishing

After the refrigerant pipe, inter-unit wires, and drain pipe have been
connected, cover them with fi nishing tape and clamp them to the wall with
off-the-shelf support brackets or their equivalent.
Keep the power wires and indoor/outdoor connecting wires off the valve on
the gas side or pipes that have no heat insulator.
Power supply
terminal block
L N
Earth screw
Power supply wire
10 L N
90
30
Earth line
• 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.
• 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 qualifi ed
service person.
Failure to clean the indoor/outdoor units regularly will result in poor
performance, icing, water leaking and even compressor failure.

Functions to be Implemented Locally

Night operation control
10
• Low-noise operation is available during nighttime hours by connecting a
commercially available timer and separately sold applicable control wire
TCB-KBOS1E.
For more information, refer to the manuals of these parts.
40
• The power saving function of the air conditioner reduces the level of
nighttime operating noise.
• Suffi cient capacity for low-noise operation cannot always be provided,
depending on external conditions, including the outside air temperature.
Power supply
Handling existing pipe
wire
When using the existing pipe, carefully check for the following:
• Wall thickness (within the specifi ed range)
• Scratches and dents
• Water, oil, dirt, or dust in the pipe
• Flare looseness and leakage from welds
• Deterioration of copper pipe and heat insulator
Cautions for using existing pipe
• Do not reuse a fl are nut to prevent gas leaks.
Replace it with the supplied fl are nut and then process it to a fl are.
• Blow nitrogen gas or use an appropriate means to keep the inside of the
pipe clean. If discolored oil or much residue is discharged, wash the pipe.
• Check welds, if any, on the pipe for gas leaks.
When the pipe corresponds to any of the following, do not use it. Install a
new pipe instead.
• The pipe has been opened (disconnected from indoor unit or outdoor unit)
for a long period.
• The pipe has been connected to an outdoor unit that does not use
refrigerant R22, R410A or R407C.
• The existing pipe must have a wall thickness equal to or larger than the
following thicknesses.
Reference outside diameter (mm)
12

Test Run

Annual Maintenance

∅9.52
∅15.88
∅19.1
Wall thickness (mm)
0.8
1.0
1.0