Heat Demand And Heat Request - Siemens Synco 700 Series Basic Documentation

Sensor supervision
in general
Fault status messages
More than 1 boiler
faulty
Building Technologies
HVAC Products
The other sensors, which also belong to function block "Boiler sequence manager",
such as the return sensor for the common maintained boiler return temperature, or the
return sensor for the consumers, are monitored for short-circuit and open-circuit.
Number Text
332 [Boiler seq] MBRT sensor
error
333 Consumer return sensor
error
Number Text
2300 >1 boiler faulty
The fault with the highest priority is sent via the KNX bus. If more than 1 boiler is faulty
(and thus shut down), fault status message ">1 boiler faulty" is delivered. Without this
fault status message, the message of only 1 boiler would appear.
6.5

Heat demand and heat request

MAX
Function block "Boiler sequence manager" collects the heat requests from all consumers
(heating circuit, DHW heating and primary controller), the external inputs and the manual
setpoint preselection. These setpoints are used to generate the maximum value.
Main menu > Boiler sequence manager > Boiler sequence optg mode
or
Operating line
Setp preselection manual
If there is no heat request, sustained mode can become active, if parameterized.
On the controller, 1 analog and a maximum of 3 digital inputs can be configured as heat
demand inputs.
Main menu > Commissioning > Extra configuration > Boiler sequence manager > Inputs
Operating line
Heat request modulating
Heating curve request 2-pos
DHW request 2-pos
Frost prot request 2-pos
Boiler sequence controller RMK770
6 Boiler sequence management
Effect
Nonurgent message, must be acknowl-
edged, no plant stop
Nonurgent message, must be acknowl-
edged, no plant stop
Effect
Urgent message, must not be acknowl-
edged, no plant stop (the faulty boilers have
already been shut down)
Heat request heating circuits
Heat request DHW heating
Heat request precontrol (heating, ventilation,
individual room control)
Setpoint preselection manual
Heat request continuous (DC 0...10 V)
Heat curve request 2-position
Heat request DHW
Heat request frost
Setpoint sustained mode
Range
---- / 8...140 °C
Adjustable values / remarks
Factory setting
---- °C
91/232
CE1P3132en
23.04.2009