Buffer Sensor - Siemens Albatros2 RVA78.690 User Manual

Nominal setpoint
Release
Auto generation lock
Auto heat gen lock SD
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Siemens
Building Technologies
6.8

Buffer sensor

6.8.1 Operation
Line no. Operating line
4700 Nominal setpoint
4701 Release
24 h/day
Time program
The nominal setpoint is used for buffer storage tank recharge using external
generation. The multifunctional relay ZX1 must be defined as "Heat request K27".
The relay is enabled if the buffer storage tank temperature is below the nominal
setpoints and the release (OL4701) allows this.
The buffer storage tank is not charged in summer for active summer/winter
changeover (OL730).
The nominal setpoint has not impact on collectors and solid fuel boilers. These
heat the buffer storage tank to the maximum charging temperature (OL4750).
An active overheat protection function for the collector or boiler can exceed this
value.
24 h/day
T he buffer storage tank recharge may always be released.
Time program
The buffer storage tank recharge may only be released, if
The time switch project (501-506) is set to "On". No heat demand is report during
the remaining time.
6.8.2 Automatic locks
Line no. Operating line
4720 Auto generation lock
None
With B4
With B4 and B41
4721 Auto heat gen lock SD
Under an automatic generation lock, controllable heat generation (via K27)= is only
reactivated if the buffer storage tank is no longer able to cover present heat
demand.
The automatic generation lock only act on configured relay "Heat request K27".
None
Function is deactivated.
With B4:
S ensor B4 is used releasing and locking the heat source.
With B4 and B41:
Sensor B4 is used for releasing the heat source. Sensor B41 is used generation
lock.
The switching differential for generation lock can be set.
Solar compact controller
The settings in detail
CE1U2396en
18.08.2010