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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E
HVAC Products Description of the OEM settings 15.07.2002
Decrease: Switching differential will become smaller
More frequent and shorter heating up times, smaller temperature
variations
6 D.h.w. temperature control
2-position control heats the d.h.w. at certain intervals. The duration of d.h.w. heating
depends mainly on the storage tank’s capacity and water volume and the amount of
d.h.w. currently required.
OFF
ON
P
°C
TBWx
TBWw
2371D05
TBWw-SDBW
t
D.h.w. ON: TBWx = TBWw - SDBW
D.h.w. OFF: TBWx = TBWw
°C
2379Z24a
ON
OFF
w
TBWx
[]
P
6.1 Legionella function
• Potential legionella viruses in the d.h.w. storage tank will be killed at regular
intervals.
The legionella function ensures that the d.h.w. in the storage tank will periodically be
raised to a temperature of at least 60 °C, thus making certain that potential legionella
viruses will be killed.
1. Press the line selection buttons to select line 42OEM.
2. Press the + / – buttons to activate or deactivate the legionella function.
Setting range Unit Factory setting
0 / 1 Increment 1
The setting activates or deactivates the legionella function.
Entry:
0 OFF: Function not active.
Legend
TBWx Actual value of d.h.w.
temperature
TBWw D.h.w temperature setpoint
SDBW Switching differential of d.h.w.
ON Switch-on point
OFF Switch-off point
t Time
P Pump
Switching differential
Benefit
Description
Setting
Effect
TBWx Actual value of d.h.w. temperature
TBWw D.h.w temperature setpoint
SDBW Switching differential of d.h.w. (41)
P Pump (ON / OFF)
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