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Building Technologies Boiler sequence controller RMK770 CE1P3132en
HVAC Products 7 Boiler control 23.04.2009
• Setting ”Off“: The boiler also remains off in the event of risk of frost
• Setting “On“: The boiler is put into operation to ensure frost protection
Main menu > Commissioning > Settings > … or
Main menu > Settings > Boiler … > Limitations
Operating line Range Factory setting
Frost prot (release input off) Off / On On
Each boiler can also be locked as a function of the outside temperature.
If the attenuated outside temperature exceeds the adjusted limit value, the boiler is
locked. If the attenuated outside temperature drops below the limit value by 1 K, the
boiler is released again.
When the outside temperature exceeds 12 °C, boiler 2 shall be locked (too large, the
smaller boiler can satisfy the demand for heat).
When the current outside temperature drops below the set limit value, the boiler is
locked. When it exceeds the limit value by 1 K, the boiler is released again.
When the outside temperature falls below –8 °C, the air-to-water heat pump shall
receive no more heat requests (efficient heat pump operation no longer possible).
Main menu > Commissioning > Settings > … or
Main menu > Settings > Boiler … > Operation settings
Operating line Range Factory setting
Boiler lock outside temp >
---- / 5…30 °C ---- °C
Boiler lock outside temp <
---- / -50…10 °C ---- °C
7.6 Individual operation
In the extra configuration, a digital control input for “Individual operation“ can be config-
ured for boiler 1. If that input is active, boiler 1 is controlled to an adjustable setpoint,
independent of the boiler sequence manager.
Main menu > Commissioning > Settings > … or
Main menu > Settings > Boiler 1 > Operation settings
Operating line Range Factory setting
Boil setp individual operation 10…95 °C 80 °C
A typical application of individual operation is the separate circuit for DHW heating. With
this application, boiler 1 is hydraulically decoupled for DHW heating and, during the
time DHW is heated, the boiler temperature setpoint is maintained at a constant level.
This application is made possible with individual operation; in that case, hydraulic
decoupling from DHW heating must be made separately.
Outside temperature lock
Example
Example
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