Part 2: Overview of display values and settings
Expert
area
33
T-SOLAR [T-MF4] = Temperature of the solar collector
T-SOLAR [T-MF 1-3] = Temperature of the heat
exchanger
T-DHW B [F12]= Temperature of hot water storage tank
in infeed area
ON: T-SOLAR > [T-DHW B + MF HYST]
OFF: T-SOLAR < [T-DHW B + MF HYST OFF]
The pump is switched on when the temperature of the
solar collector exceeds the temperature of the storage
tank in the infeed area (T-DHW B) by the Hysteresis (MF
HYST). Switching off occurs when the temperature drops
below the temperature [T-DHW B + MF HYST OFF].
Safety / system protection:
Please See “Max T-Solar” and “Max T-Bu HW”.
28 = Cylinder charging pump 2
(pump operates when the buffer storage tank can be
charged by the solar system and the hot-water tank
can not be charged by the solar system)
!
The F15 function must stand on 5.
!
The temperature of the medium used for charging
the storage tank is always measured at the MF4
sensor [T-MF4]. Exception: In the case of function
[23] at MF4, the sensor assigned to the MF relay
Cylinder charging pump 2 is used to determine the
temperature of the medium used for charging the
storage tank [T-SOLAR].
T-SOLAR [T-MF4] = Temperature of the solar collector
T-SOLAR [T-MF 1-3] = Temperature of the heat
exchanger
T-Buffer B [F1] = Temperature of buffer storage in the
infeed area
ON: T-SOLAR > [T-Buffer B + MF HYST]
OFF: T-SOLAR < [T-Buffer B + MF HYST OFF]
The pump is switched on when the temperature of the
solar collector exceeds the temperature of the storage
tank in the infeed area (T-Buffer B) by the Hysteresis (MF
HYST). Switching off occurs when the temperature drops
below the temperature [T-Buffer B + MF HYST OFF].
Safety / system protection:
Please See “Max T-Solar” and “Max T-Bu BU”.
29 = Cylinder charging pump 3
(pump operates when the storage tank 3 can be
charged by the solar system and the buffer storage
tank can not be charged by the solar system)
!
The F15 function must stand on 5.
!
The temperature of the medium used for charging
the storage tank is always measured at the MF4
sensor [T-MF4]. Exception: In the case of function
[23] at MF4, the sensor assigned to the MF relay
Cylinder charging pump 3 is used to determine the
temperature of the medium used for charging the
storage tank [T-SOLAR].
T-SOLAR [T-MF4] = Temperature of the solar collector
T-SOLAR [T-MF 1-3] = Temperature of the heat
exchanger
T-Storage 3 [F15]= temperature of storage tank 3 in the
infeed area
ON: T-SOLAR< [T-Storage 3 + MF HYST]
OFF: T-SOLAR < [T-Storage 3 + MF HYST]
The pump is switched on when the temperature of the
solar collector exceeds the temperature of the storage
tank in the infeed area (T-Storage 3) by the Hysteresis
(MF HYST). Switching off occurs when the temperature
drops below the temperature [T-Storage 3 + MF HYST
OFF].
Safety / system protection:
Please See “Max T-Solar” and “Max T-Bu HW, BU, 3”.
30 = Transfer pump DHW storage tank II
!
The F15 function must stand on 4.
Relay switches when the temperature of the hot-water
storage tank exceeds the temperature F15 by the
hysteresis (MF HYST ). Switching off occurs when the
temperature drops below the temperature
[F15 + MF HYST OFF].
31 = Transfer pump buffer storage tank II
!
The F15 function must stand on 4.
Relay switches when the temperature of the buffer
storage tank exceeds the temperature F15 by the
hysteresis (MF HYST ). Switching off occurs when the
temperature drops below the temperature [F15 + MF
HYST OFF].
32 = Direct heating circuit
Heating circuit with fixed flow temperature => T-MF Des
In the event of a short circuit at the assigned MF sensor
(via room thermostat/timer switch)
=> Heating circuit pump ON
=> Preset desired flow temperature to the HS
After the sensor short circuit has been eliminated, a run-
on time takes effect on the pump.
33 = Thermostat function
ON: T-MF > T-MF DES
OFF: T-DHW < [T-MF DES – 5K]
34 = Bypass valve cooling mode
The relay is switched in cooling mode
=> separation of the conventional HS from the cooling
circuit.
=> This means hot water preparation during cooling
operation is possible (the flow temperature for the HS
control is captured by the MF sensor).
T-MF(1-4) Setpoint
(switching temperature relay MF)
MF (1-4) Hyst
(Switch on hysteresis Relay MF)
MF (1-4) Hyst Off
(Switch off hysteresis Relay MF)