Electric Immersion Heater; System Pump - Siemens Synco 700 Basic Documentation

Plant types
Changeover to summer
operation
Changeover in the event
the heat source fails
Extra configuration
Settings
Changeover to electric
immersion heater
Operation with electric
immersion heater
Building Technologies
HVAC Products

10.11.4 Electric immersion heater

With the exception of DHW plant type DHW 0, which uses exclusively an electric
immersion heater, all DHW plant types with storage tank can be switched to electric
immersion heater during summer operation. Operation with an electric immersion
heater is identical to space heating mode with the same DHW operating modes, set-
points, legionella function, etc.
Only DHW plant type DHW 0 can operate without a storage tank sensor. In that case,
only the electric immersion heater will be enabled.
Changeover to summer operation takes place depending on the heating circuits' heat
demand. If the heating circuits do not call for heat for a period of 48 hours, changeover
to summer operation will take place at midnight. The electric immersion heater receives
the release signal and storage tank charging with hot water will be switched off.
⇒
Frost protection for the storage tank will still be ensured (also refer to subsection 10.8.3
"Frost protection functions").
As soon as one of the heating circuits calls for heat, there will be a change to winter
operation with hot water.
If the heat source reports a fault (e.g. due to a malfunction or user intervention), the
electric immersion heater will be enabled and storage tank charging with hot water
switched off. For this function to be performed, heat source and DHW heating must be
included in a system network. For more detailed information about function block
"Meter", refer to chapter 14 "Communication".
The output is to be activated via "Extra configuration":
Main menu > Commissioning > Extra configuration > Outputs > Electric immersion
heater Assign terminal
Main menu > Commissioning > Settings > ... or
Main menu > Settings > DHW > DHW
Operating line
Changeover el immersion heater
Operation el immersion heater
Using this setting, changeover to the electric immersion heater can be deactivated. In
that case, the storage tank is charged with hot water throughout the year.
When using the electric immersion heater, it can be selected whether the storage tank
setpoint shall be predefined by the time switch or whether it shall apply permanently.
This setting is active only during operation with the electric immersion heater and
when a storage tank sensor is available

10.11.5 System pump

The boiler pump (system pump) for DHW heating must be activated depending on the
type of hydraulic circuit.
The required function can be selected on the service level:
Main menu > Commissioning > Settings > ... or
Main menu > Settings > DHW > Controller primary circuit
Operating line
System pump required
Modular Heating Controller RMH760B
10 DHW heating
Range
Yes / No
Normal setpoint /
Automatically
Range
Yes / No
Factory setting
No
Automatically
Factory setting
Yes
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CE1P3133en
05.02.2007