Ventpro Silenta-S Series User Manual Download Page 3

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The

fan

with timer

starts operation as control voltage is

supplied to LT input terminal. As control voltage is off the fan
continues operating within the time period set by the regulated
timer from 2 to 30 minutes.
Adjust the timer operating time by means of rotating the
potentiometer T adjusting screw clockwise to increase the
delay time or counter-clockwise to decrease it.
The

fan equipped with delay timer and humidity sensor

starts operation either as control voltage is supplied to LT input
terminal or as indoor humidity level exceeds the pre-set value
regulated between 60% and 90%.
As control voltage is off or as indoor humidity level drops below
the pre-set level the fan continues operating within the time
period set by the regulated timer from 2 to 30 minutes.
Adjust the timer operating time by means of rotating the
potentiometer T adjusting screw clockwise to increase or
counter-clockwise to decrease the delay time and
potentiometer H adjusting screw clockwise to increase or
counter-clockwise to decrease the humidity threshold value.

Warning! The timer circuit is under voltage.

Adjusting and regulating operations are allowed only after
power is off.
While adjusting the screws avoid excessive efforts to the screw
driver.
The wiring diagram for connection of the light to the fan timer
controlled by a common switch is shown at fig. 15 and 25
(S - external swich).
After light is off the fan continues operating within the time
period set by the regulated timer from 2 to 30 minutes.

Any electric connections, adjustment, servicing and repair
works are allowed only after the unit is disconnected from
power mains.
Mounting and maintenance are allowed for duly qualified
electricians with valid electrical work permit after careful study
of the present user's manual.
The single-phase power grid must comply with the acting
local electrical norms and standards.
The fixed electrical wiring must be equipped with an
automatic circuit breaker.
The fan must be connected to the power grid through the
automatic circuit breaker QF integrated into the fixed
wiring system.
The gap between the breaker contacts on all poles must
be not less than 3 mm.
Before installation check the fan for any visible damages
of impeller and casing. The casing internals must be free
of any foreign objects which can damage the impeller blades.
Misuse of the device or any unauthorized modification is
not allowed.
The unit is not to be used by children and persons with
reduced physical, mental or sensory capacities, without
proper practical experience or expertise, unless they are
controlled or instructed on the unit operation by the person(s)
responsible for their safety.
Do not leave the children unattended to avoid their playing
with the device.
Take steps to prevent ingress of smoke, carbon monoxide
and other combustion products into the room through open
chimney flues or other fire-protection devices.
Sufficient air supply must be provided for proper combustion
and exhaust of gases through the flue (chimney) of fuel
burning equipment to prevent backdrafting.