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FB Function WE Anl Comments
22 Current input for
flow rate
measurement
OFF All FB22 = ON: Current input active
Select: 0: 0 to 20 mA signal feedforwarding
4: 4 to 20 mA signal feedforwarding
A 50-
Ω
resistor must be connected to terminals 15 (+) and GND
(terminals ½) in parallel to the current signal
FB22 = OFF: Pulse input active
Setting only possible after entering key number!
23 Flow rate or
capacity limitation
OFF All FB23 = ON and FB22 = OFF: Limitation with pulse input
Function block parameters:
Max. limit value / 3 to 500 pulse/h (500 pulse/h)
Limiting factor / 0.1 to 10 (1)
Max. limit value for DHW / 3 to 500 pulse/h
(500 pulse/h)
Limiting factor / 0,1 to 10 (1)
FB23 = ON and FB22 = ON: Limitation with current input
Function block parameters:
Upper measuring range / 0.01 to 650 m
3
/h (10.00 m
3
/h)
Min. limit value / 0.01 to 650 m
3
/h (0.01 m
3
/h)
Max. limit value / 0.01 to 650 m
3
/h (9 m
3
/h)
Setting only possible after entering key number!
The following function blocks are in the second level
24
(0)
Potentiometer input
1 to 2 kΩ
OFF FB24 = ON: Potentiometer input connected at terminal 12
FB24 = OFF: Type 5244 or 5257-5 Room Panel connected
25
(1)
Release for
control/external
demand over BE1
OFF 1
to
11*
FB25= ON: Configuration of BE1
Select: FErn: Release for control
bEd: Demand of a minimum flow temperature
Function block parameter:
Min. flow temperature for external demand / 20 to 130 °C (20 °C)
* Not Anl 4, 5 and 9 with solar system or Anl 11 with VF3
26
(2)
Circulation pump
(ZP)
OFF 2 to
11
FB26 = ON: Circulation pump operation acc. to time schedule
FB26 = OFF: ZP operation switches off SLP
27
(3)
Flow sensor VF3 OFF 3, 8,
11
FB27 = ON: Sensor activated
28
(4)
Pump management
UP1
OFF All FB28 = ON: BA9 not active outside times-of-use
FB28 = AUS: BA9 active outside times-of-use
84 EB 5476 EN
Appendix