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Building Technologies Boiler sequence controller RMK770 CE1P3132en
HVAC Products 10 Heating circuit control 23.04.2009
Main menu > Commissioning > Settings > … or
Main menu > Settings > Heating circuit > Mixing circuit controller
Operating line Range Factory setting
Actuator running time
1…600 s 150 s
P-band Xp
1…100 K 50 K
Integral action time Tn
0…600 s 60 s
For more detailed information about mixing valve control and its setting aids, refer to
section 5.7 “Mixing valve control”.
10.6.2 Load control
The heat output of mixing valve control can be reduced by functions of higher priority
(e.g. by return temperature limitation) or by functions of other plant (boiler, DHW heat-
ing). This is accomplished via load control.
Load control
Heat demand
Load reduction can be triggered by one of the following functions:
• Protective boiler startup
• Limitation of the return temperature
• DHW heating with shifting priority
• DHW heating with absolute priority
A load increase can be in the form of pump and/or mixing valve overrun. In principle,
this merely means maintaining the load.
Load reduction
Load increase
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