10
8 Electrical connections
The appliance must be earthed. All wiring must conform to B.S 7671:IEE wiring regulations. And be completed by a
qualified electrician.
This appliance is suitable for 230v ~ 50Hz single phase supply fused at 3 amps.
The appliance is supplied with a mains flexible cable (PVC sheathed, 6-core 0.75mm²).
A double pole switch having a minimum contact separation of 3.0mm must be used to provide isolation for the unit.
Switch Positions
Function
Trickle (Low) (R1)
100% adjustable
Medium
(R2)
100% adjustable
Purge (High)
(R3)
100% adjustable
Remote Switch Positions
(R4) 100%
adjustable
(R5) 100%
adjustable
Upon installation the fan should be started in High speed mode to ensure optimum performance of the fans and
switched to the required continuous ventilation setting.
The fan speed controller
must not
be mounted above or closer then 1m to a cooker where it could be affected by
excessive heat or moisture.
8.1 Wiring Diagram
A five speed control switch (3
x manual, 2 x external
sensors) is supplied. Each
fan speed must be adjusted
to suit dwelling on installation
(R1/R2/R3).
Any optional external sensors,
i.e.: CO2, Humidity,
Timer/Clock, Motion/PIR
must also be adjusted when
connected (R4, R5).
Important all the external
sensors must have volt free
contacts.
Suggested set points are
shown for general purpose
ventilation (trickle, medium,
purge) which enable manual
boost for purge (maximum)
ventilation and/or override of
external sensors when fitted.
