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Load reduction
Load increase
Settings
Caution
Building Technologies
HVAC Products
10.7.2 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.
T
T
Heat
source
Heat
consumer
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 load maintenance.
10.8
Optimization functions
The optimization functions are activated or influenced by the following settings:
Main menu > Commissioning > Settings > ... or
Main menu > Settings > Heating circuit > Optimizations/influences
Operating line
Type of optimization
Forward shift on max
Early shutdown max
Quick setback
[Boost heating] setpoint increase
Room temperature rise
10.8.1 Type of optimization
The type of optimization decides whether the optimization functions and boost heating
shall be performed based on the measured room temperature or whether the room
model shall be used.
In plant where the heating circuit operates in connection with a ventilation system as a
room control combination, the room temperature sensor of the ventilation plant must
not be located in the extract air!
Boiler Sequence Controller RMK770
10 Heating circuit control
T
Heat demand
Load control
Heat
consumer
Range
With room model / With
room temp sensor
0...48 h
00.00...06.00 h.min
Off / On
0...20 K
1...600 min/K
Factory setting
With room model
0 h
00:00 h.min
On
5 K
60 min/K
165/226
CE1P3132en
01.03.2005
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