Minimum Flow Temperature Setpoint (Tvhw); Heat Generation Lock; Changeover Of Operating Mode - Siemens RVA63.280 Basic Documentation

D.h.w.
Note
Chimney sweep function
Note
Note
Siemens Building Technologies
Landis & Staefa Division
2.59.2

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.
2.59.3

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.
2.59.4

Changeover of operating mode

Setting 3/4)
Using a modem, for example, the operating mode of heating circuit 1 or 2 can be
switched to stand-by . When the contact connected to terminal H2 is closed, the
signal lamp or the operating mode button will then flash.
Setting 3: the operating mode of heating circuit 1 will change when the contact is
closed. D.h.w. heating remains unchanged.
Setting 4: the operating mode of heating circuit 2 will change when the contact is
closed. D.h.w. heating remains unchanged.
These settings have no impact on other controllers in the system.
If desired, this function can also be accomplished with the help of terminal H1 and
setting line 170.
Basic Dokumentation RVA63.280, RVA53.280
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CE1P2374E
19.04.2001