9.
Fasten the back-plate to the wall/ceiling using appropriate fasteners. See figure A.
10.
If using screws, do not over tighten. The fan may also be fixed to a wall tube using the clamping brackets. Tighten
the screws until the fan is firmly secured to the tube – see figure B.
Wire the electrical connections.
11.
Make sure the mains supply is isolated. Switch off the mains electrical supply and remove fuses.
12.
Feed the cable to the terminal block. Wire the fan as shown in Figure F using the diagram appropriate to the fan
model.
13.
Connect the cable from the isolating switch to the electrical supply wiring.
Fan Settings.
SPEED SETTING
The fans are factory set to bathroom speed, but have two speed settings for different applications. Select either kitchen or
bathroom speed by connecting the jumper between the centre and kitchen or bathroom speed pin on the jumper (see Figure
E)
CV4S /CV4R– see figures D and E.
•
The pre-set humidity operation is factory set at approximately 75% Relative Humidity (RH), but can be adjusted
between 65% and 85% RH by control H.
•
The over-run timer is factory set at 15 minutes but can be adjusted from 30 seconds to 30 minutes by control T.
•
The over-run timer also sets the length of time the fan runs when activated by a ‘fast’ increase in humidity.
•
Turn the controls clockwise to increase RH or time and anti-clockwise to decrease.
Using the fan.
The fan will run continuously at its trickle speed setting as set during the installation procedure.
•
Automatic mode- The fan automatically adjusts to slow changes in natural humidity levels without operating the
fan. If the humidity levels increase at a rate slower than 5% RH in 5 minutes, up to the pre-set humidity level, the
fan will not be triggered by humidity. This is to prevent nuisance triggering of the fan. If humidity levels increase
quicker than 5% RH in 5 minutes the fan will increase in speed to an interim boost speed setting. When relative
humidity drops the fan continues to operate for the adjustable time delay. When the humidity is above the pre-set
humidity level the fan will run at a higher speed until the humidity drops below the pre-set value. If humidity levels
do not drop within 5 minutes the fan will further boost to its maximum speed setting until humidity drops.
•
External operation- Use the external boost switch (if fitted). When the fan is switched off, the fan continues to
operate for the adjustable time delay then goes into automatic mode.
All Fans
Re-fit the front cover/baffle assembly by hooking in the top first, and then swing the cover down to clip into place.
Hour run meter
All fans incorporate an hour run meter that allows the installer to measure the actual running time of the fan after
installation. The meter records continuous power supply on time and displays this via an on-board red LED that always
flashes to indicate the total number of hours the supply has been on (see fig. G).
F
For fixed wiring circuits the protective fuse for the appliance must not exceed 5A.
