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Thermal Safety cut outs
The power supply to the heating elements will be interrupted if one
or a combination of the following abnormal events occur:
1. Air inlet or outlet grilles are obstructed.
2. Internal ventilation is impaired due to build up of dust
and fl uff.
3. Blower unit stalls.
To reset the thermal safety cut-outs, access reset (red) buttons
(see Fig. 9). Before re-setting the reason for activation must be
determined and corrective action taken.
Low pressure hot water heated / Ambient (fan
only) variants
Operation using switch box - CABC6
Switch on electrical supply to the air curtain. Rotate the switch to
the desired heat setting. Settings available are;
OFF
Low Fan
High Fan
The rocker (auto / manual) switch allows for manual over-ride of
a door switch if fi tted. Manual allows the appliance to run at the
desired setting, while Auto provides an energy saving feature by
shutting down the appliance while the door is closed. The unit
should always be switched OFF using the switch box control, and
not by mains power supply interruption. When fi rst turned on the
control will run through a system check. The selected settings will
be reached and maintained after a 30 second period.
Thermostatic control (optional)
1) A thermostat may be connected to ‘C’ in Fig. 6 or Fig. 7 to
regulate the outlet air temperature on electric heated models.
2) A thermostatic regulation valve with a remote sensing bulb
(not supplied) can be positioned in the supply water pipe-work to
regulate the heat output on water heated models.
3) An electrical 3-Port Solenoid Valve can also be connected into
the system. Please contact your service agent using the contact
details for more details.
Door switch control (Water heated & Ambient
models)
By including a door switch in the circuit (as per ‘D’ in Fig. 8) the
air curtain will respond to door openings as follows:
(1) Door opening will energise the air curtain at the set
conditions (switch box settings).
(2) On door closure operation will continue at the set conditions
for a further 1 minute.
(3) Between 1 minute and 2 minutes from door closure ½ fan
set back operation will activate.
(4) After 2 minutes, the air curtain will return to a dormant state until
the door is re-opened. If the door re-opens during this 2 minute
run on cycle, the process will re-start at (1).
Wiring Diagrams
ARC ‘E’ - Electric models - see Fig. 6
ARC ‘W’ / ‘A’ - Water heated & Ambient models - see Fig. 7
C - Thermostat
D - Door Switch (Optional)
E - Thermal Safety Cut-out Circuit
F - Elements
- BMS Switches (Optional)(S0,S1,S2)
M - Motor
Remote (BMS / BEMS) Operation
Connection to Building Energy Management Control Systems
(BEMS) is possible so that remote control of the air-curtain can
be carried out in conjunction with other equipment. Please refer
to the table in Fig. 6 & 7 to make the appropriate connections to
the PCB.
Modular Connection
A number of units can be connected together to form one
continuous long air curtain. Each appliance should be supplied
separately. Simultaneous control of all the air curtains is achieved
by linking the PCB’s with a modular linking cable found in the
modular linking kit. (Kit Ref. - CABM1) Refer to instructions
provided with the modular linking kit.
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