Part 2: Overview of display values and settings Expert area
39
20 = Temperature-controlled circulation pump
T-CIRCL = Return flow temperature of circulation line
ON: T-CIRCL < T-MF1
OFF: T-CIRCL > [T-MF1+ HYST MF 1]
The circulation pump is switched on when the return flow
temperature drops below the set limit temperature
(T-MF1).The pump is switched off again when the return
flow temperature exceeds the set limit temperature by the
Hysteresis (HYST MF 1).
The set circulation program and the "Circulation with hot
water" setting have an overriding function
=> Switching on only takes place during enable periods.
21 = Pulsed circulation pump
ON: In the event of short circuit at multifunction sensor
input
OFF: After 5 minutes
If a short-cut occurs at the multifunction sensor input the
circulation pump is switched on for 5 minutes. Switching on
takes place on the edge (once only).
The set circulation program and the "Circulation with hot
water" setting have an overriding function
=> Switching on only takes place during enable periods.
22 = Integration of the heat generator for solid fuel
T-SOLID FUEL = Temperature of the heat generator for
solid fuel
T-BUFFER B = Temperature of the storage tank at the in-
let area (connector III, pin 2 + 3)
ON: T-SOLID FUEL >
[T-BUFFER B + HYST MF 1 + 5K]
OFF: T-SOLID FUEL <
[T-BUFFER B + HYST MF 1]
Start-up relief:
ON: T-SOLID FUEL > T-MF1
OFF: T-SOLID FUEL < [T-MF1 – 5K]
The pump is switched on when the temperature of the heat
generator for solid fuel exceeds the temperature of the
buffer storage at the inlet area (T-BUFFER B) by the hyste-
resis (HYST MF 1 + 5 K). Switching off occurs when the
temperature drops 5 K below the switch-on temperature.
Switching off additionally occurs when the temperature of
the heat generator for solid fuel drops below the set limit
temperature
(T-MF1) by 5 K. The pump is enabled again when the tem-
perature of the heat generator for solid fuel exceeds the
set limit temperature
(T-MF1).
Disabling the HS1:
ON: T-SOLID FUEL +5 K > T-HS DES and solid fuel
boiler pump = ON
OFF: T-SOLID FUEL < T-HS DES or solid fuel boiler
pump = OFF
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