Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 9 Heating circuit control 2017-09-29
HDCmf
HDEco
TOact
TOStrDmp
TOeff
3131D30
Comfort
heating limit
Eco
heating limit
Whether the heating limit function shall be active in operating mode "Continuously
Comfort
" can be selected on the "Space heating" menu.
This setting is always active, independent of whether the operating mode was switched
to "Continuously Comfort
" or through the room operating mode contact.
Exempted from this is the room control combination with an RMU7… ventilation
controller; here, the heating limit is always active.
For operation in combination with the ventilation controller, summer / winter operation
changeover is used as an overriding function.
When the attenuated outside temperature exceeds the Comfort heating limit, a change
to summer operation will take place; this also applies to operating mode "Continuously
Comfort
".
9.6 Mixing valve control
9.6.1 Control
The flow temperature setpoint determined by weather-compensated heating circuit
control generates the effectively active setpoint for mixing valve control while giving
consideration to load control.
Mixing valve control can be effected with a 3-position or DC 0…10 V actuator. The type
of actuator is to be selected via "Extra configuration".
The following mixing valve settings apply to both the 3-position and the DC 0…10 V
actuator:
Main menu > Commissioning > Settings > … or
Main menu > Settings > Heating circuit 1 (or 2 or 3) > 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".
9.6.2 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 plants (boiler, DHW
heating). This is accomplished via load control.
Heating limit when
Comfort is preselected
Summer / winter operation
(information for ventilation)
Setpoint
3
-position actuator /
DC 0…10 V actuator