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Siemens Building Technologies Basic Documentation RVA63.242, RVA53.242 CE1P2373E
Landis & Staefa Division Description of heating engineer settings 26.03.2001
4.30.6 Electric immersion heater for d.h.w. water
The connected electric immersion heater is used to heat the d.h.w. during the summer
months (automatic summer / winter changeover).
When both heating circuits change to summer operation (THG1 and THG2), automatic
changeover to d.h.w. heating will then take place, provided d.h.w. heating has been
switched on with the operating mode button.
Since the function depends on automatic summer / winter
changeover, changeover to d.h.w. heating with the electric
immersion heater takes place only in heating circuit operating mode
“Automatic operation” and in “Standby”.
In heating circuit operating mode “Continuous operation”, the boiler
continues to deliver the amount of heat required. Hence, this
operating mode may not be selected for the summer if the d.h.w.
shall be heated with the electric immersion heater.
Switching on / off with the d.h.w. operating mode button remains
fully active. Hence, for the d.h.w. to be heated during that period of
time, the operating mode button for d.h.w. must be pressed.
To ensure a smooth transition of d.h.w. heating when changing to summer operation,
the boiler charges the d.h.w. storage tank until 24.00 hrs on the day of change to avoid
potential interruptions caused by utility locking periods.
4.30.7 Solar pump
When using a solar collector, a circulating pump for the collector circuit is required.
Depending on the hydraulic circuit and the selection of solar heat usage, it can be used
for d.h.w. heating or the buffer storage tank.
4.30.8 Pump H1
Pump H1 can be used for an additional consumer. Together with an external demand
for heat at input H1, it is possible to serve an air heater or similar. The pump has an
overrun time of one minute which, in the case of overtemperature protection, is
extended by the setting “Pump overrun time”.
4.30.9 Boiler pump
The pump connected to terminal K6 serves as a boiler bypass pump which is used for
circulating the water in the primary circuit. It is possible to select different modes of
control for the boiler pump. Also refer to "control of boiler pump" in Index.
Operating modes of
heating circuit
Operating mode of
d.h.w. heating
Note
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