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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
Electric immersion heater
4.158 Release outside temperature for electric
immersion heater in the buffer storage tank
Above the release outside temperature, the electric immersion heater in the buffer stor-
age tank is locked for d.h.w. heating. Frost protection always remains active, however.
Setting range
Unit
Factory setting
--- / –30...30
°C
–5
--- Function
deactivated
As soon as the “Attenuated outside temperature” (operating line 704) falls below the
release outside temperature adjusted here, the electric immersion heater will be re-
leased.
Depending on whether the heat sources are operational or locked (defective), the
RVP540 / RVP550 uses the electric immersion heater for reheating or emergency
heating (for description, refer to operating line 170).
4.159 Selection of control sensor for electric
immersion heater in the buffer storage tank
Either common flow temperature sensor B10 or buffer storage tank sensor B4 can be
used as the control sensor for the electric immersion heater in the buffer storage tank.
Setting range
Unit
Factory setting
0 / 1
–
1
For the “Reheating” and “Emergency heating” functions (for description, refer to oper-
ating line 170), the control sensor can be selected.
0
Common flow temperature sensor B10
Control is provided with common flow temperature sensor B10
1
Buffer storage tank sensor B4
Control is provided with buffer storage tank sensor B4
For the frost protection function of the buffer storage tank, buffer storage tank sensor
B4 is always used – independent of the selected control sensor.
Description
Setting
Effect
Description
Setting
Effect
Important
