HEATER OPTION WIRING DETAIL FOR GENERAL APPLICATION
(OTHER THAN BATHROOM)
Figure 8.
All wiring is supplied for connecting the heater to the main PCB. The unit is
supplied with cable ties and sticky pads to enable any excess cable to be
restrained. Note: If the heater is to be controlled off a remote
switch/thermostat this should be wired into the live line between the main
PCB and unit mounted switch, in accordance with current IEE regulations.
HEATER OPTION WIRING DETAIL FOR (BATHROOM APPLICATION)
If units are installed in a bathroom the unit mounted heater switch cannot be
used. A remote neon indicator switch (by others) complying and installed to
the latest regulations should be used.
Alternative heater/
transformation piece position
Heater/transformation
piece.
Heater cables
PCB
These heater terminals are NOT used for
bathroom applications.
Optional plug-in ‘hour run monitor’ (records number
of hours run) order code: FLAT-HRM.
For bathroom applications the neon switch plate
CANNOT be used. A full blanking plate is substituted
and the incoming heater electrical supply is routed
direct to the heater terminal block.
Heater supply wires routed through the rubber
cable grommet behind the PCB.
For bathroom applications the terminal block (supplied)
is fitted inside the unit using the two holes provided.
Remote
indicator
switch
(by others).
Independent
230v electrical
supply
for heater
Figure 9.
ELECTRICAL CONNECTION
Please note the electrical connections to the unit should be carried out by a
qualified electrician.
With the PCB cover removed (see figure 2) pull the PCB forward to gain
access to earth post behind. Connect Earth cable to Earth Post next to the
grommet hole. (If the heater option is required the wiring should be
connected to the appropriate terminal on the PCB).
Slide PCB into slot and connect the mains supply L and N to the
terminal block.
3.0 ELECTRICAL DETAILS
Supply - 230V 1 phase 50Hz
Power Consumption
(without heater option)
Speed 1 - 5 Watts
Speed 2 - 8 Watts
Speed 3 - 13 Watts
Optional Heater - 300 Watts.
The unit should be wired in accordance with current IEE regulations.
IMPORTANT
For good EMC engineering practice, any sensor cables or switched live cables should not
be placed within 50mm of other cables or on the same metal cable tray as other cables.
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Alternative heater/
transformation piece position
Heater/transformation
piece
Optional plug-in ‘hour run monitor’ (records number of hours run)
order code: FLAT-HRM.
Neon switch plate used for all general applications (except bathroom)
see below. The electrical supply for the heater is taken from the PCB
terminal block and connected the two lower tags on the neon switch.
The upper pair of tags on the neon accept the heater leads.
PCB
The power to the heater should be taken directly from the remote switch to
the heater via the terminal block, and should not use the supply from the
mains PCB.
3.1 SMOKE ALARM AUTOMATIC SHUT DOWN
If the unit is required to switch off in the event of smoke detection, alarms are
available with separate relay bases from companies such as:
Dicon Safety products – www.diconsafety.co.uk
Aico Ltd – www.aico.co.uk
Figure 10. Typical wiring (refer to manufactures specific instructions)
Mains power Smoke No contacts
230V
Supply
230V
Flatvent
PCB
N
N
C
NC
NO
L
L
4.0 SETTING THE UNIT
The speed selector is located on the PCB (see bathroom application figure 11)
The unit has a choice of three speeds to suit the size of the dwelling and the
moisture being generated. The unit is factory set at No 3. We recommend that
the unit is operated at this speed and the setting reduced if and when
necessary in the future.
Replace PCB cover and test the unit. Check rotation of fan with diagrams
under airflow direction. If direction is incorrect, isolate the unit, remove PCB
cover and alter the rotation switch (mounted on the PCB). Replace PCB cover
and re-check direction of fan. Replace filter and front cover.
INSTALLATION AND MAINTENANCE
Low Energy Positive Input Ventilation Unit
