Rotex Controller Series Product Documentation page 134

EbV
Start-up protection: Buffer start-up protection (only with charging control)
In buffer operation there is no start-up protection for the heat generator acting on the
heating circuits. The start-up protection only acts on the buffer loading pump. When
buffer start-up protection is switched on and the buffer tank temperature drops below
the minimum temperature limit, all consumer circuits are separated hydraulically
(pumps are switched off). The buffer start-up protection is disabled (pumps are
switched on again) when the buffer tank temperature exceeds the buffer minimum
temperature plus half of he buffer switching differential. All consumer circuits remain
in operation when buffer start-up protection is switched off.
Discharge
protection: Buffer discharge protection (only charging control)
Buffer discharge protection disables the buffer loading pump until the heat generator
temperature has risen to more than 5 K above the buffer nominal temperature.
This measure prevents any rear buffer discharge through the heat generator. The
buffer loading pump is disabled again as soon as the temperature difference
between the heat generator and the buffer tank has dropped to less than 2 K.
Buffer sensor 2: Buffer sensor 2 (BU 2)
The buffer tank can be equipped with a second sensor (BU2) for unmixed storage
tank loading and discharge. Loading starts if the highest of both temperatures falls
below the setpoint. Loading is finished if the lowest of both temperatures exceeds the
setpoint plus buffer switching differential. [stratified discharge]
Operation buffer parameters:
8-50
Note on operation
Buffer sensor 2 (bottom)
Minimum temperature
Maximum temperature
Temperature excess H-GEN
Switching differential
Forced heat dissipation
Drain function switch-on differential
Drain function switch-off differential
Start-up protection
Discharge protection
Product documentation THETA NORM/UNIT
Key / parameter tree
HYDRAULIC
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
Parameter
PARAMETER 08
or
PARAMETER 09
or
PARAMETER 10
PARAMETER 01
PARAMETER 02
PARAMETER 03
PARAMETER 04
PARAMETER 05
PARAMETER 06
PARAMETER 07
PARAMETER 08
PARAMETER 09