BrookVent AF 90-DMEV-100, Руководство пользователя, Страница: 19 / 24

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6.0 Controls and Settings
Without humidistat / timer
The fan runs continuously at selected trickle speed (set by the jumper switch combination
and can be boosted with a dedicated ON/OFF switch (or PIR, CO2 sensor) or with a light
switch. Trickle speed can be set to off .
With humidistat / timer
The fan is equipped with a humidity sensor, whose threshold is adjustable from 50% to
95% Relative Humidity via a dedicated trimmer, and with a timer which is adjustable from
0 to approx. 30 minutes via a dedicated trimmer. The fan runs continuously at selected
trickle speed (set by the jumper switch combination) and increases its speed when the
percentage of Relative Humidity exceeds the settable threshold, the fan can also be
boosted with a dedicated ON/OFF switch (or PIR, CO2 sensor) or with a light switch. Trickle
speed can be set to off. To deactivate the humidistat function, turn the trimmer HY
completely clockwise.
Automatic humidistat operation: when the percentage of Relative Humidity exceeds
the settable threshold, fan speed automatically increases to “comfort boost” speed,
(intermediate between the selected trickle speed and the boost speed). When the
percentage of Relative Humidity goes below the threshold, the fan continues to function
at “comfort boost” speed for a factory set period of time then returns to selected trickle
speed.
Operation with external switch: When the external switch is turned on, the fan is
boosted. After the external switch is turned off, the fan continues to run at boost speed
for a settable period of time, then it returns to selected trickle speed (or to “comfort
boost” speed in case autom
atic humidistat operation is on). The front cover LED indicates
when the external switch is on. The over-run timer function is activated only if the external
switch has been on for at least 60 seconds.
Constant flow version
The fan is provided with an over-run timer, adjustable from 0 to approx. 30 minutes via
trimmer. The fan runs continuously at selected trickle speed (set by the jumper switch
combination), and can be boosted with a dedicated ON/OFF switch (or HY, PIR, CO2
sensor) or with a light switch.
In some jumper switch combinations the “constant flow” mode is activated.
In these cases, the airflow detection system will detect the installation duct resistance and
also react to external wind conditions to ensure the fan maintains a constant extraction
rate.