Toshiba RBC-IT2-PE INSTALLATION MANUAL
TOSHIBA
RBC IT2 – PE TIME SWITCH INTERFACE
FITTING AND OPERATING INSTRUCTIONS
WARNING
Mains voltage is present. It is the responsibility of the user to ensure compliance with the
Health and Safety at Work Act, 1974 and compliance with all relevant codes of practice.
IF IN DOUBT - ASK!
The RBC IT2 – PE time switch interface is intended for use with all the TOSHIBA cooling only and heat pump
indoor units in the RAV range and it should be fitted in accordance with these instructions.
The RBC IT2 - PE allows these systems to be externally switched on and off by means of any volt-free external
terminals rated at 230 volts a/c. Typically this will be a time switch, automatic restart after a power failure, frostthermostat protection or other form of switching.
For advice in this area, please call Toshiba Air Conditioning Technical on (01276) 694205
It is important to note that if a RBC IT2 - PE interface is used the standard 24hour timer functions on any of the
Toshiba remote or central controllers must not be selected to avoid conflict in switching commands. Do not use
the standard RBC WT1-PE 7 – day timer.
The remote controller on/off button will be overridden whenever an interface is connected to socket CN06,
regardless of whether the RBC IT2 – PE is in use or not. All other functions of the remote controller remain
unaffected.
When more than one system is connected for group operation, it is essential to arrange the power supply to the
outdoor units so that the control circuits for all the indoor units are fed from the same phase.
The interface should only be fitted to the master indoor unit. If fitted to a slave indoor unit then system shut
down may occur.
It is recommended that the power supply (230v.a.c.) be taken from the respective indoor unit, as indicated on the
wiring diagram.
The field sourced time-switch may be located in any area. The a/c system will start when terminal 1 of the
interface is energised and will override the remote controller on/off functions.
Due to the logic used, it is recommended that a minimum switching interval of 30 seconds be adopted. When
first energised, it may be noticed that the indoor unit starts briefly and then stops, this is normal and does not
indicate a fault with the system.
FIXING DETAILS
The interface should be fitted in position on the relevant indoor unit and secured by means of the adhesive pads
provided on the rear.
In some cases it is easier to disconnect the electrics box and withdraw it from its housing completely. Any
excess cable should be coiled and secured near the interface box.
TOSHIBA reserve the right to alter, modify or carry out improvements to their equipment without prior notice
Toshiba Air Conditioning Tel. (01276) 694205
RBC IT2 – PE issue 1 - April 99 - Supersedes all previous data sheets
PDF created with FinePrint pdfFactory trial version http://www.fineprint.com
TOSHIBA
123
ABC
1234567
8
CN06 ON
INDOOR
PCB
Splice
Terminals
1 & 3 are 230 volts a/c.
A & B are 12 volts a/c.
Grey Lead is
5 volts D.C.
Site Wiring
123
A
B
C
TERMINALS
123
4
5
6
7
8
RBC IT2 - PE
CN06 ON
INDOOR
PCB
Fig. 1a Heat Pump
Splice
Terminals
1 & 2 are 230 volts a/c.
A & B are 12 volts a/c.
Grey Lead is 5 volts
d.c.Site Wiring
CIRCUIT DIAGRAMS
External
Switch
INDOOR
UNIT
Note: Socket CN06 is referred to as PJ06 on earlier RAV Heat Pump indoor units, the wiring remains the same.
Red
Black
Orange
Yellow
SOLDERED
CONNECTIONS
BLACK LEAD 1.5m
Fig. 1b Cooling Only
External
Switch
INDOOR
UNIT
TERMINALS
Red
RBC IT2 - PE
Black
Orange
Yellow
SOLDERED
CONNECTIONS
BLACK LEAD 1.5m
IMPORTANT
Ensure that the electrical feed to the time clock is the same electrical phase as the “L”
terminal on the single phase units or “L1” on the three phase units. These terminals are the
single phase derivation from the outdoor unit in each case. Zero voltage should be measured
between terminal 1 of the Type T2 and terminal 1 of the indoor unit when energised. If 400
V.a.c. is detected between these two terminals it is essential that the unit is isolated and the
correct phasing is determined.
Toshiba Air Conditioning Tel. (01276) 694205
RBC IT2 – PE issue 1 - April 99 - Supersedes all previous data sheets
PDF created with FinePrint pdfFactory trial version http://www.fineprint.com
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