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When switched 'ON', the fan will operate at the selected speed and will continue to
run for a pre-set time after the LS switch is turned 'OFF'.
TIMER ADJUSTMENT (SEE FIG.4)
BEFORE ADJUSTING THE TIMER, SWITCH OFF THE MAINS SUPPLY.
TIMER SHOULD ONLY BE ADJUSTED BEFORE OR DURING
INSTALLATION.
1.
Remove the fan grille. The timer is factory set at 15 minutes approx. The
overrun time period can be adjusted from 5-25 minutes by altering the
adjuster on the control PCB.
2.
To REDUCE the operating time, use a small screwdriver to turn the
adjuster Fig.4. ANTI-CLOCKWISE.
3.
To INCREASE the operating time, use a small screwdriver to turn the
adjuster Fig.4. CLOCKWISE.
4.
Replace the fan grille.
D. SERVICING AND MAINTENANCE.
WARNING: THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST
BE ISOLATED FROM THE POWER SUPPLY DURING MAINTENANCE.
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. Wipe the inlets and front face with a damp cloth until clean.
Fig.1.
Fig.2 – Basic VASF100B
1 PHASE SUPPLY
(220-240V 50Hz).
Note: LS is not used on the basic model
N
~
FUSE
L
SWITCHED
FUSED
SPUR
5
N
L
Ls
Fan
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