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Siemens Building Technologies
Basic Documentation RVA47.320
CE1P2379E
HVAC Products
Description of the heating engineer settings
15.07.2002
4.8
Actual value of buffer storage tank
temperature
When using alternative heat sources, the buffer storage tank temperature is used as a
control criterion for the release of additional heat sources.
1. Press the operating line selection buttons to select operating line 58.
2. No setting can be made with the + / - buttons.
Display
Unit
0...140 °C
The actual temperature in the buffer storage tank (B4) will automatically be displayed
on this line.
To be used as a buffer storage tank temperature sensor, input B70/B4 must be
appropriately defined (operating line 97, setting 2)
If input B70/B4 of the first cascade controller is already used by the optional cascade
return temperature sensor B70, buffer storage tank temperature sensor B4 can be
connected to input B70/B4 of the second controller.
4.9
Actual value of the d.h.w. temperature
(TBWx)
1. Press the operating line selection buttons to select operating line 59.
2. No setting can be made with the + / - buttons.
Display
Unit
0...140 °C
The temperature measured with the d.h.w. temperature sensor (B3) connected to the
controller, or the d.h.w. temperature transmitted by the BMU via PPS will automatically
be displayed on this line.
With the type of d.h.w. demand ”Thermostat” (line 125), there will be no temperature
display of course. The display shows ” --- ”. The input test (line 52, test step 1)
provides information about the current switching status of the thermostat.
– – –
Sensor with open-circuit or no sensor connected
0 0 0
Sensor with short-circuit
Description
Setting
Effect
Important
Note
Setting
Effect
Note
Special displays
