Vent-Axia MV250H(RF) Operating Instructions Manual - page 5
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HUMIDITY ADJUSTMENT.
Adjust potentiometer to the required humidistat setting, Fig. 2. To increase the humidistat set point, rotate the
adjuster anticlockwise and to decrease the humidistat set point rotate the adjuster clockwise.
The Multivent reacts automatically to an increase in %RH above the set point value. If high humidity is detected,
the fan speed increases to medium for 30 minutes. At the end of this period, if high humidity is still detected, the fan
speed increases to high for 15 minutes. At the end of this period, if the humidity is low, the fan returns to its original
low setting, but if still high, the fan reverts back to medium speed for 30 minutes and so on.
OVER-HEATING PROTECTION
The MULTIVENT motor is fitted with Standard Thermal Overload Protection. This will automatically switch the fan Off
in the event of a fault condition.
If this occurs isolate the MULTIVENT, check for and remove any obstruction, leave for a short time for the motor to
cool before reconnecting. If this recurs, Isolate the MULTIVENT and call a service engineer.
Humidity adjustment
Fig. 2