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.
Installation and Maintenance
Low Energy Positive Input Ventilation Unit
10.0 Electrical Connection
Please note: the electrical connection of the unit must be be carried
out by a qualified electrician.
Electrical details:-
Voltage:
240V 1ph 50Hz
Consumption:
40W (max)
Fuse rating:
3 Amp
NOTE This unit must be earthed
The three core cable from the mains power supply should be
connected to a fixed wiring installation, via a fused isolator, in
accordance with current IEE wiring regulations.
11.0 User Control
The user control should be fitted to an appropriate wall (fixings
supplied). Position the control so that the user can gain easy access.
Instructions for fixing are supplied with the control.
Screw the backplate to the wall. Connect the cable (supplied) and
clip the control into place. Route the cable to the loft and connect
to the main unit control module panel (see figure 14).
Secure the cable to prevent accidental dislocation.
User Control Test
Ensure the power light is on green and the status light is either
green or amber.
If the power light is not on check the wiring and connections between
the fan unit and the user control.
Function
The user control as shown in figure 18 above, has a target
temperature setting dial knob and two press buttons (under the
flap) which enable the fan to be switched off or the airflow to be
boosted to its maximum duty.
Figure 14. Control module panel on unit (cover removed).
12.0 Airflow Adjustment on fan unit
The unit has six air volume (speed) settings. The setting switch is
located on the main control box on the fan case.
Figure 14. shows the LED’s that, when illuminated, indicate the
corresponding air volume for the unit.
For example, a one bedroom, one person bungalow would be
adjusted to the lowest setting (two LED’s on the left illuminated).
A five bedroom seven person detached house would need to be
set to the highest (all three LED’s illuminated).
With power connected the three LED’s will flash randomly for
appoximately 2 minutes and will then indicate the speed currently
set. To select another speed, simply continue to press the button
down until the required setting is shown.
Power
Status
Power
Status
User contr ol
cover closed
User contr ol
cover open
L N
NET 1 NET 2 NET 3 NET 4
Figure 13.
6
Leaflet Number 671347 October 2007
