Configuration Manual

Version Document
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001
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ccess V4.X Configuration manual
37 (56) 2018-07-11
Dehumidification
An analogue output is used to control a dehumidifier. The output will increase on
increasing humidity. A digital output can also be used to start a dehumidifier.
Humidification/dehumidification
An analogue output is used to control a humidifier. The output will increase on
decreasing humidity.
The cooling output Y3 will be activated for dehumidification through condensation. The
output will increase on increasing humidity. This signal overrides the cooling signal
from the temperature controller so the output can be activated for dehumidification
even if the temperature controller demand is zero.
For good temperature control when using cooling for dehumidification it is important
that the cooler is placed first in the air stream so that the exchanger and heater can be
used to reheat the air after dehumidification.
Digital humidity signal
A digital output signal, "Dehumidification/Humidification", can be used for on/off control
of humidifiers/dehumidifiers. The output signal has an Activate value and a Deactivate
value which are connected to the humidity controller output. The signal is activated
when the humidity controller output rises above the set Activate value and is
deactivated when the humidity controller output drops below the set Deactivate value.
If a start signal is needed for a cooling unit or a magnetic valve for DX
dehumidification, the digital output signal “Start P1-Cooling” should be used. In this
case, the “pump” stop delay should be set to 0 s.
Filter monitor
Activate: Configuration > Function Configuration > Function Activation
 No
 Yes
Configure: Configuration > Function Configuration > Filter monitor
Type
 DI Digital pressure guard
 AI Analog pressure transmitter
Placement
 Supply
 Extract
 Supply & Extract
Filter alarm reset
 No
 Yes Reset the calender counter.
Fiter alarm time (month)
 Time to next filter replacement
Analogue filter monitoring may be made air flow dependent. This means that a
higher pressure drop is permitted across a filter at a higher air flow. For this
purpose, X and Y coordinates are used to set the linear function that should be