CorroVenta HomeVision Lite, Руководство пользователя

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HomeVision® Pro/Lite
© Corroventa Avfuktning AB Rev A 8 (30)
Mould Growth Index RH control
In addition to Fixed RH control, HomeVision® Pro also implements Mould Growth Index, MGI,
control. The control mechanism makes use of the fact that mould growth, in addition to being
humidity dependant also is temperature dependant. At lower temperatures, higher humidity can be
tolerated without causing mould growth, the positive side of which is of course the potential to save
further energy.
The MGI control principle, as explained implemented in HomeVision® Pro for its energy saving
potential, is visualized in the schematic diagram below. The diagram is not to scale but intended only
to explain and clarify the principle and its parameters.
The upper curve, the Mould Growth Index curve, is programmed in HomeVision® Pro and is not
affected by user settings. The user is instead allowed to set RH safety margin, Hysteresis Upper and
Lower and alarm limit, the meanings of which are explained by the following example.
The principals are familiar to those acquainted the Fixed RH control but instead of a setpoint a safety
margin is defined. As with the Fixed setpoint, the RH safety margin is exceed by the Hysteresis Upper
before the dehumidifier is activated.
The RH safety margin does thus not constitute a maximum
level . As for Hysteresis and the Alarm, these function the same way with MGI as with Fixed.
RH safety margin, %RH: -15% Activation:
Current MGI– RH safety Hysteresis Upper =
= Current MGI – 15% + 4%
Hysteresis Upper/Lower: + 4%, -4% Deactivation:
Current MGI – RH safety margin – Hysteresis Lower =
= Current MGI– 15% - 4%
Alarm, +%RH: 10% Added to activation to level to give Alarm level.
Alarm level:
Current MGI – RH safety Hysteresis Upper + Alarm=
= Current MGI – 15% + 4% + 10 %
Current MGI = The relative humidity that for current temperature is the lower limit for mould growth.
% - RH
Temperature
Mould Growth Index curve
RH - MGI
Safety Margin
-
Hysteresis Upper
Hysteresis Lower
Dehumidification Off
Dehumification On
Alarm, +%RH