Siemens RVA53.242 - Page 147

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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
4.82.2 Minimum flow temperature setpoint (TVHw)
The adjusted minimum flow temperature setpoint of setting line 171 will be activated
when a switch connected to the terminal (e.g. an air heater function for a warm air
curtain) closes its contact. During this switching status, the LED of the respective
heating circuit operating mode button flashes. For details, also refer to "minimum flow
temperature setpoint contact H" (setting line 171) in Index.
When the minimum flow temperature setpoint is activated, d.h.w. is still being heated, if
required.
If desired, this function can also be accomplished with the help of terminal H1 and
setting line 171.
4.82.3 Heat generation lock
Heat generation will be locked when a switch connected to the terminal (e.g. peak load
shaving via ripple control) closes its contact.
All temperature demands of the heating circuits and of d.h.w. heating will be ignored.
Frost protection for the boiler will remain ensured.
The chimney sweep function can be activated although the heat generation lock is
switched on.
If desired, this function can also be accomplished with the help of terminal H1 and
setting line 170.
4.82.4 Buffer storage tank sensor 2 (bottom)
When choosing this setting, the terminal can only be used with the second buffer
storage tank sensor. Die untere Pufferspeichertemperatur wird für Solaranbindungen
benötigt.
The d.h.w. storage tank temperature can be acquired with one sensor located at the
bottom and one at the top of the tank.
For more detailed descriptions about the control with 2 buffer storage tank sensors,
refer to "∆Τ control" in Index
In the case of buffer storage tank charging with solar energy, it is important to have
sensor B4 located at the top of the storage tank and sensor B41 at the bottom.
D.h.w.
Note
Chimney sweep function
Note
Notes