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Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 6 Function block "Enduser d.h.w." 23.10.2002
6 Function block "Enduser d.h.w."
This function block contains settings for d.h.w. heating that the enduser himself can
make.
6.1 Operating lines
Line Function, parameter Unit
Factory
setting
Range
26 Setpoint of NORMAL d.h.w. temperature °C 55 20...100
27 D.h.w. temperature Display function
28 Setpoint of REDUCED d.h.w. temperature °C 40 8...80
6.2 Setpoint
The NORMAL and REDUCED d.h.w. temperature setpoints are to be entered in °C.
When using thermostats, it must be made certain that the NORMAL setpoint entered
here agrees with the setpoint of the thermostat or – if 2 thermostats are used – of both
thermostats. If there is a deviation, the charging temperature cannot be correctly cal-
culated (charging temperature = NORMAL setpoint [operating line 26] + boost of
charging temperature [operating line 127]).
If d.h.w. heating is switched to the electric immersion heater, the setpoint adjustment is
inactive in that case, since the thermostat of the electric immersion heater will ensure
temperature control of the storage tank.
6.3 Actual value
The d.h.w. temperature is displayed in °C as follows, depending on the type of plant:
Plant type Display
x–1, x–2, x–3 B31 or maximum selection of the 2 storage tank sensors B31 and
B32
x-4 D.h.w. flow temperature sensor B3
If the measurement is made with one or 2 thermostats, it is not possible to display the
actual value. In that case, the display shows ---.
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