Technichal Manual Heating Actuators AKH
MDT technologies GmbH •
51766 Engelskirchen
• Papiermühle 1
Tel.: +49-2263-
880 • Fax: +49
-2263-4588
• [email protected] • www.mdt.de
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The startup delay time defines the time, which elapses between a bus power return or an ETS-
Download and the functional restart of the device.
The setting of the voltage level defines the voltage for the connected thermal drives. This setting
changes only the fault detection, other functions are identical. At the 230V mode, the fault detection
recognizes power failure as well as short circuits. At the 24V mode only short circuits are recognized.
If a fault is detected, a 1-signal is sent by the belonging communication object. Additional, the
channel, which is in the fault mode, reacts with a fast flashing of the belonging channel LED. If the
230V main voltage failures, all 4 channels flash, which are connected to this L-connection.
Number
Name
Length
Usage
83/163
Fault
1 Bit
reports an active fault
Table 8: Communication object fault
Attention: The first channel of the 4-fold actuator as well as the first and fifth channel of
the 8-fold actuator has to be connected first. Otherwise a fault will be detected!
Attention: Every actuator can operate only one voltage, either 230V or 24V. A
combination of both voltages is forbidden because of the conductor track distances!
4.1.2 Summer/Winter mode
At the following settings, the summer/winter mode can be adjusted:
Figure 10: Summer/Winter mode
The following chart shows the dynamic range for this parameter:
Sub function
Dynamic range
[default value]
comment
Control values set to 0% at
summer mode
Yes
No
If this setting is active, the control
value will set to 0% at summer
mode
Polarity for object
Summer/Winter
Summer=1/Winter=0
Summer=0/Winter=1
Adjustment of the polarity for
switchover
Table 9: Summer/Winter mode
The heating actuator can be set in a summer or winter mode. The polarity of the switchover object
can be adjusted.
Additional a setting can be made which sets the control value continuous to 0% at the summer
mode. Of course, this setting can only be done if a switchover between heating and cooling is
disabled (have a look at 4.1.3). So the actuator works only at the heating mode.
Number
Name
Length
Usage
80/160
Summer/Winter
1 Bit
Switchover between summer and winter mode
Table 10: Communication object Summer/Winter mode
