Technichal Manual Heating Actuators AKH
MDT technologies GmbH •
51766 Engelskirchen
• Papiermühle 1
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• [email protected] • www.mdt.de
46
4.5.7 Additional settings at combined heating & cooling mode
If the integrated controller is adjusted with heating and cooling mode, it must be adjusted whether a
combined circuit or a divided circuit is given:
Figure 31: Combined systems
The following chart shows the dynamic range of this parameter:
Sub function
Dynamic range
[default value]
comment
System
2 Pipe system
4 Pipe system
4 Pipe system without
cooling requirement
Adjustment whether combined or
divided systems are given
Table 51: Combined systems
At the setti g Pipe s ste
, a combined heating and cooling system is geiven. So one channel
controls one and the same valve for heating and cooling.
If the setti g Pipe s ste is sele ted, a di ided s ste is gi e ith a o ooli g i uit a d a
own heating circuit. Because two valves are given, the valves must be controlled from different
channels. So an extra communication object, call
ed PWM ooli g fo pipe s ste , is sho . This
object can be processed arbitrarily, e.g. from another channel, selected as continuous.
Additio al the e is a setti g, alled Pipe s ste
ithout ooli g e ui e e t . This setti g effe ts
that no heating/cooling requirement is sent, when the cooling is activated.
The communication object for a 4 pipe system is shown at the chart:
Number
Name
Length Usage
6
PWM cooling for 4 pipe
system
1 Byte
Control value for the cooling mode
Table 52: Communication object for 4 pipe system
