Dimensions
Optional ancillaries
Maintenance
General
It is inevitable that some dust, fluff etc. will pass through the fil-
ters, and which, if allowed, will build up internally on motors
and impellers, shortening the life of the unit and, in severe cases,
leading to overheating of the motors.
Consequently, it is strongly recommended that all units are
inspected and cleaned every six months. To clean the filters,
remove them from the unit , wash in tepid water to which a lit-
tle mild detergent has been added. Shake out excess water and
allow to dry naturally. Replace when dry.
Isolation
Ensure that the unit is totally isolated from the electrical supply.
This is particularly important when dealing with a run-on cir-
cuit or a continuously running fan unit with boost when the
room light is switched on (letter X in the Model Code) AS THE
INPUT SOCKET TERMINALS WITHIN THESE UNITS
REMAIN LIVE, EVEN WHEN THE ROOM LIGHT OR
OTHER ACTUATING SWITCH IS OFF. Take care therefore
when working within the case with the fan module removed.
Procedure
At all times, take care not to damage, distort or disturb the
balance of the impellers. Remove the cover and then the fan
module after releasing the spring clips. Inspect all parts.
Using a brush or dry cloth clean the backplate. Lightly brush
away dust and dirt from the fan module. If stubborn, carefully
remove with a suitable blade or scraper. Wash the cover in warm
soapy water. Dry thoroughly. Refit the fan module, followed by
the cover. Test/run the unit.
Adjusting the run-on timer
Remove cover. Locate the Time Delay Adjustment at the plastic
box integral with the fan module. Re-set against the graduated
scale. Re-fit the cover.
Warranty
The plastic control box integral with the fan assembly is a sealed
component. Breaking the plastic sealing tie will invalidate the
guarantee. The unit is guaranteed for a period of 3 years.
Installation and Maintenance OPUS (B range)