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Thermostatic control
A capillary type thermostat is factory fi tted within the unit, as per
‘C’ in Fig. 8, giving a selection scale of 0-40ºC. When the ther-
mostat operates, the power output will reduce depending on the
switch setting.
- Fan only - No effect
- Half Heat - Heater will reduce to Fan only
- Full Heat - Heater will reduce to Half Heat
Door switch control (Electric 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 condi-
tions (switch box settings).
(2) On door closure operation will continue at the set condi-
tions for a further 1 minute.
(3) Between 1 minute and 2 minutes from door closure, set
back operation, ½ heat (if heat selected) and ½ fan will
activate.
(4) Between 2 minutes and 3 minutes, the fan only (½ speed)
shut down cycle will be engaged.
(5) After 3 minutes, the air curtain will return to a dormant
state until the door is re-opened.
If the door re-opens during this 3 minute run on cycle, the
process will restart at (1).
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.
Before resetting the thermal safety cut-outs you must turn
the power OFF. Unlock the grille by moving the two sliders
into the open position ‘x’ as shown in Fig. 2A, using a small
screw driveror other suitable tool. With the grille partially open
disconnect the safety cord to allow the grille to fully open. Then
access the reset buttons as shown in ‘y’ in Fig. 2B. Before
re-setting the reason for activation must be determined and
corrective action taken.
Low Pressure Hot Water (LPHW) 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 thermostatic regulation valve with a remote sensing bulb
(not supplied) can be positioned in the supply water pipe-work to
regulate the heat output.
2) An electrical 3-Port Solenoid Valve can also be connected into
the system. Please contact your sales or service agent using the
contact details provided.
Door switch control (Water heated & Ambient
models)
By including a door switch in the circuit (as per ‘D’ in Fig. 9 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
CAB & DAB ‘E’ - Electric models - see Fig. 8
CAB & DAB ‘W’ / ‘A’ - Water heated & Ambient models - see
Fig. 9
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. 8 & 9 to make the appropriate connections to
the PCB.
Modular Connection
Refer to instructions provided with the modular linking kit.
De-rating the unit to operate at ½ heat setting
Please contact your sales or service agent using the contact
details provided.
Operation on a Single Phase Supply
Please contact your sales or service agent using the contact
details provided.
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