Fb Function
WE
Anl
Comments
Function block parameters
/ Range of values (default settings)
17 Flow sensor OFF
with room tempera-
ture-dependent
control
OFF
6, 9
Co1, 2, 3 -> Fb17 = ON: Deactivate flow sensor
18 Differential temper-
ature control using
variable weighting
factors
OFF
All
Co1, 2, 3 -> Fb18 = ON: Only for mixer circuits
Function block parameters:
Proportional gain (K
P
) / 0.1 to 999 (0.5)
Reset time (T
N
) / 1 to 999 s (200 s)
Intended temp. difference / 0 to 40 °C (20 °C)
Analog value max. / 0 to 100 % (90 %)
Analog value min. / 0 to 100 % (30 %)
Fb Function block, WE Default setting
Co4: DHW heating
Fb Function
WE
Anl
Comments
Function block parameters
/ Range of values (default setting)
00 Storage tank sensor
SF1
ON
Not
1, 3, 6
Co4 -> Fb00 = OFF, only with storage tank thermostat:
Co4 -> Fb00 = OFF and Co4 -> Fb01 = OFF
01 Storage tank sensor
SF2
ON
Not
1, 3,
6
Co4 -> Fb01 = ON: 2 storage tank sensors SF1 and SF2
Co4 -> Fb01 = OFF: 1 storage tank sensor SF1 or with
Co4 -> Fb00 = OFF: Storage tank thermostat
02 Return flow sensor
DHW circuit
OFF
Not
1, 2,
3, 6
Co4 -> Fb02 = ON: Return flow sensor in DHW circuit active
Function block parameters:
Limitation factor / 0 to 25.5 (1.0)
Note:
Can only be changed after entering the key number
03 Flow sensor
VFS
ON
Not
1, 3,
6
Co4 -> Fb03 = ON: Charging temperature limited with VFT,
regulated with VFS
Co4 -> Fb03 = OFF: Charging temperature regulated with VFT,
without VFS
04 Circulation pump
OFF
Not
1, 3,
6
Co4 -> Fb04 = ON: ZP continues to run during storage tank
charging
Co4 -> Fb04 = OFF: ZP runs acc. to time schedule
05 UP OFF at the start
of reverse control
OFF
5
Co4 -> Fb05 = ON: UP of pump heating circuit is additionally
switched off when reverse control starts.
EB 5179 EN
99
Appendix
