Dehumidifier ML420-MLT1400
4. Set the mode switch on the control panel to
”0”
and check that both the indicator lamps for the
reactivation heater go out.
NOTE!
In order to dissipate any residual heat, the reactivation air fan, process air fan and the drive motor will
continue to run (after the unit has been switched off) until the temperature has fallen below 50 °C.
5. Check that the process air fan, reactivation air fan and drive motor indicators go out when the
temperature falls below 50 °C, and that the power connected indicator remains on.
For details on the operator panel, see section
6.6.2 Automatic mode – humidity sensor connected
A single or two stage humidity sensor must be connected for the unit to be run in automatic mode. For
further information, see section
5.1.2, Single-stage humidity sensor
and
5.1.3, Two-stage humidity sensor
.
1. Set the mode switch to
AUT
.
2. Adjust the humidity sensor setpoint to the lowest RH value. Set the main power switch to
”1”
(on).
Check that the following indicator lamps are on and that the unit is running.
■
Mains supply connection indicator
■
Unit running indicator*
■
Both reactivation heater indicators*
■
Both process air and reactivation air fan indicators*
■
Drive motor indicator*
NOTE!
If the current RH value in the room to be dehumidified is lower than the setpoint on the humidity sensor,
the above indicators will not light and the dehumidifier will not start.
3. Slowly increase the humidity setpoint and check that the unit switches off when the setpoint matches the
RH in the room where the humidity sensor is installed.
4. Slowly decrease the humidity setpoint and check that the unit switches on when the setpoint falls below
the RH in the room where the humidity sensor is installed.
5. Set the mode switch on the control panel to
”0”
and check that both the indicator lamps for the
reactivation heater go out.
NOTE!
In order for the unit’s heaters to cool down, the reactivation air fan, process air fan and the drive motor will
continue to run (after the unit has been switched off) until the temperature has fallen below 50° C.
6. Check that the process air fan, reactivation air fan and drive motor indicators go out when the
temperature falls below 50°C and the unit is running, and that the power connected indicator remains
on.
7. Adjust the humidity setpoint to the desired RH value.
For details on the operator panel, see section
6.6.3 Automatic mode - RH98 or VariDry (option)
If the unit is fitted with a factory installed RH98 or VariDry (option) humidity control system, the external
humidity sensor must be installed and correctly connected to the unit. The same site requirements apply to
the humidity sensor and RH98 or VariDry, see section
.
For more operational details, see appendix
.
1. Set the mode switch to
AUT
.
22
Operation
190TGB-1035-H1604
