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B. SETUP
WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED FROM
THE POWER SUPPLY DURING THE INSTALLATION / OR MAINTENANCE.
1. SELECTING THE CONSTANT TRICKLE OPTION
Link the Trickle Jumper [TR] (fig. 12.) using the supplied Jumper Header to select Constant Trickle. The Trickle
speed option is factory set in the off position (jumper open).
2. SELECTING THE SPEED
This will determine the speed at which the fan will run when activated by either the Pull-cord/LS line/Humidity/PIR.
The speed is factory set at 60m3/h.
1. Turn the Speed Adjuster [S] CLOCKWISE to INCREASE speed up to a maximum of 90m3/h (fig. 13.).
1. Turn the Speed Adjuster [S] ANTI-CLOCKWISE to decrease speed down to a minimum of 69m3/h (fig. 13.).
3. TIMER ADJUSTMENT (T, HT, TM models)
The overrun time period is factory set to 15 minutes. The overrun time period may be adjusted from 5-30
minutes by altering the adjuster on the control PCB [T] (fig. 13.).
i.
To REDUCE the operating time, turn the adjuster [T] ANTI-CLOCKWISE.
ii.
To INCREASE the operating time, turn the adjuster [T] CLOCKWISE.
IMPORTANT – DELAY TIMER (T and HT models): The timer function also incorporates a switch on delay,
which will start the fan after approximately 1-4 minutes for the set timeout period. The delay is only activated
via the LS and not via the pull-cord or humidity sensor (if applicable). If the LS is switched off during the 1-4
minute period, the fan will remain off.
4. HUMIDITY ADJUSTMENT (HT model)
The fan's Humidity Set-Point is factory set to switch the fan on at 72%RH (fig. 13.).
i.
To LOWER the Set-Point, turn the Humidity Adjuster [RH] ANTI-CLOCKWISE. This makes the fan more
sensitive to RH%, i.e. the fan will come on at a lower RH%.
ii.
To RAISE the Set-Point, turn the Humidity Adjuster [RH] CLOCKWISE. This makes the fan less sensitive
to RH%, i.e. the fan will come on at a higher RH%.
C. WIRING.
WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED FROM
THE POWER SUPPLY DURING THE INSTALLATION / OR MAINTENANCE.
Use 0.75mm
1. Select and follow the appropriate wiring diagram (fig. 14-15.).
2. It maybe necessary to feed the mains cable around between the outside of the Base Housing [C] and the Skirt
[H] to prevent the cable from being trapped.
3. Check all connections have been made correctly and ensure all terminal connections and cable clamps are
securely fastened.
4. Ensure the impeller rotates and is free from obstructions.
D. SERVICING AND MAINTENANCE.
WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED
1. At intervals appropriate to the installation, the fan should be inspected and cleaned to ensure there is no build
up of dirt or other deposits.
2. Remove the Filter [B] (fig. 2.) and wash in warm soapy water.
3. Wipe the inlets and front face with a damp cloth until clean.
4. Replace the Filter.
The fan has sealed for life bearings, which do not require lubrication.
2
cable
FROM THE POWER SUPPLY DURING MAINTENANCE.
5
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