5
CHAPTER 4
FUNCTION
4.0
Function description
All of the following information and instructions are intended for use by
authorized electricians. All times may vary slightly due to component
tolerances and ambient temperatures.
Exceed of the humidity threshold or demand ventilation caused by switching
the switch will lead to the turning on of the fan. The required ventilation is
superior to the humidity control.
Automatic mode:
The humidity control works without connecting a switch.
Demand ventilation:
By connecting e.g. a 2 speed switch from the Airflow range of
accessories the fan can be used on different speed levels 1 and 2. The use of the
switch is consistent with the functions of the fan by default.
The speed of the fan level is continuously adjustable (factory setting Level 1 - 70%,
Level 2 - 100% of the maximum speed). The adjustment applies to both - demand
ventilation as well as for the humidity control. In order to ensure a sufficient
dehumidification, the rotational speed is in the automatic mode, but always at least
50% in the low stage and at least 80% in the high stage, even with a smaller
potentiometer setting.
1. Humidity functions
You can choose between single-stage, dual-stage and continuous humidity
functions. The choice of the humidity function is technically bound to the allocation of
timer functions to certain fan levels.
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Single-stage humidity function
In the single-stage humidity function, the desired dehumidification stage can be
preset. The fan is turned on at the stage when dehumidification is required. This
feature is set at the factory to ensure a speedy dehumidification.
-
Dual-stage humidity function
During dual-stage humidity function, the fan will turn on first to the stage with a lower
speed. Once the humidity level reaches 10%, the fan will turn on to the higher stage
and will remain on as long as the humidity remains above the threshold. It will turn
back to the lower stage automatically after the humidity level comes back down to
less than 10 percent. Switching between the stages should have a minimum runtime
of 10 minutes. This function returns soft dehumidification to the humidity values over
the switching on threshold. A continued rise in the room’s humidity then results in
strong dehumidification.
-
Infinitely variable humidity function
During continuous humidity function the air volume is automatically controlled,
depending on the room’s humidity. When the humidity increases, the fan speed
increases. This ensures continuously increasing dehumidification during slowly rising
humidity. It is useful to go back to the factory setting to start the dehumidification
even at a low level of humidity in the room (e.g. left stop corresponds
dehumidification from 40% RH, this corresponds to about 20% of the fan speed).
2. Humidity Control
The electronics detect two different types of humidity increases in the air, it
distinguishes between a slow and rapid increase of moisture. The switch-on
threshold is adjustable between 40% RH and 90% RH.
-
High humidity (slower increase in humidity)
For slow increase in humidity (caused possibly by washing, drying of textiles,
temperature lowering) the fan can be set above the threshold (factory setting is set to
70% RH) and runs until the humidity has dropped by 10%.
