Dehumidifier ML420-MLT1400
500
700
900
1100
1300
1500
20
0
40
60
80
100
120
F5
F7
400
Pa
m
3
/h
M 5
F7
Figure 1.1 Pressure drop, filter in the filter box
NOTE!
The pressure drop for the reactivation side is not shown on the diagram since the values are so small that
they do not affect the performance of the unit.
1.6 Humidity control system
1.6.1 Introduction
Munters RH98 and VariDry are humidity control systems intended for use with Munters dehumidifiers.
They control the air humidity by regulating the power to the unit reactivation heater.
The system comprises a humidity transmitter and a control unit. The humidity transmitter is a true two
wire transmitter, which is positioned where the air humidity is to be controlled, either in the relevant room
or in the air duct.
The control unit sends control signals to the dehumidifier. The power control is performed in one or two
steps.
The system has a potential free contact to which an external alarm device can be connected.
1.6.2 Transmitter
The humidity transmitters are available in two different types, wall or duct mounted.
The humidity transmitter sensor emits a signal proportional to the air humidity.
The signal is amplified and sent to the control unit by cable.
The humidity transmitter sensor is sensitive and must be handled with care.
1.6.3 Control unit
The control unit contains a controller, which receives the signal from the humidity transmitter. The
controller then sends a control signal to the dehumidifier which determines the reactivation heater output.
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Options
190TGB-1035-H1604
