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en
31
Installation
Commissioning
Adjustments
Tr
oubleshooting
Data comm
unication
Stratifi ed return
The
Stratifi ed return
function can be used for
maintaining the stratifi cation inside the store. When
the return temperature in the HW line of the sec-
ondary side is very high, the store contents might
be mixed.
If the difference between the temperatures at the
reference sensor and the store sensor exceeds the
adjusted switch-on difference (
∆
Ton), the allocated
relay is energised. The store return will be led in at
a higher level.
The relay is switched off when the controller detects
no fl ow rate at the reference sensor or the tempera-
ture difference falls below the adjusted switch-off
difference
∆
Toff
.
The stratifi ed return function can be activated once.
The corresponding relay can be allocated to either
R1 or R3, as long as these relays are not used for
other functions.
The reference sensor for the stratifi ed return can be
freely selected.
Primärseite
Sekundärseite
S3...S8
R1/R3
R4/PWM
S1
S2
R2
Adjustment channel
Description
Adjustment range / selection Factory setting
Stratifi ed return
Activating the function
Yes, No
No
Relay
Relay selection
system dependent
system dependent
∆
Ton
Switch-on temperature difference
1.0 … 50.0 K
5.0 K
∆
Toff
Switch-off temperature difference
0.5 … 49.5 K
3.0 K
Ref. sensor
Allocation of reference sensor
S1 … S7, VFD
VFD
Store sensor
Store sensor selection
system dependent
S5
back
Main menu / Additional functions / Stratifi ed return
Error relay
Adjustment channel
Description
Adjustment range / selection Factory setting
Error relay
Activating the function
Yes, No
No
Relay
Relay selection
system dependent
system dependent
back
Main menu / Additional functions / Error relay
The
Error
relay function can be used to operate a
relay in the case of an error. Thus, e. g. a signalling
device can be connected to signal errors.
If the error relay function is activated, the allocated
relay will switch on when an error occurs.
secondary side
primary side