Commissioning
Part 4: Installation and Start-up
58
21 = Pulsed circulation pump
ON: With short circuit at assigned 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 = Solid fuel boiler integration
(e.g. in connection with 2-stage HS)
T-MF1 or 1-4 = Temperature of the solid fuel boiler
T-BUFFER B = Temperature of buffer storage in the
infeed area [F1]
ON: T-MF1 > [T-BUFFER B (F1) +MF 1 HYST + 5K]
OFF: T-MF1 < [T-BUFFER B (F1) + MF 1 HYST]
Warm Up Temp:
ON: T-MF1 > T-MF1 SETPOINT
OFF: T-MF1 < [T-MF1 SETPOINT – 5K]
The pump is switched on when the temperature of the
solid fuel boiler exceeds the temperature of the buffer
storage in the infeed area [T-BUFFER B (F1)] by the
hysteresis [MF 1 HYST+ 5K]. Switching off occurs when
the temperature drops 5K below the switch-on
temperature.
Switching off also occurs when the temperature of the
solid fuel boiler drops below the set limit temperature [T-
MF1 SETPOINT] by 5K. The pump is enabled again
when the temperature of the solid fuel boiler exceeds the
set limit temperature [T-MF1 SETPOINT].
Blocking HS1:
ON:
T-MF1 > HS set tempe 5K and solid-fuel
boiler pump = ON
OFF: T-MF1 <= HS set temperature or solid-fuel boiler
pump = OFF
23 = Solar panel pump (pump is operational as soon
as the solar panel is able to charge one of the solar
storage tanks)
!
Solar panel 1 pump only at MF4 because of sensor
assignment and PT 1000
!
Solar panel 2 pump only at MF3 because of sensor
assignment and PT 1000
!
At MF1 and MF2, this function can be used to
charge the storage tank from a heat exchanger
(without PT 1000 sensor)
T-SOLAR = Temperature of the solar panel
T-B = Temperature of active storage tank at inlet area
ON: T-SOLAR > [T-B + MF HYST]
OFF: T-SOLAR < [T- B + MF HYST OFF]
The pump is switched on when the temperature of the
solar panel exceeds the temperature of the active storage
tank (see switch-over valves) in the infeed area by the
switch on hysteresis (MF HYST). Switching off occurs
when the temperature drops below the temperature [T-B
+ MF HYST OFF].
A check is conducted before switch-off as to whether a
secondary storage tank (see switch-over valves) can be
fed.
Safety / system protection:
OFF: T-T > T-MF SETPOINT
ON: T-T < [T-MF SETPOINT – 5K]
Switching-off occurs when the temperature of the active
storage tank at the upper area of the inlet exceeds the set
limit temperature (T-MF SETP). The pump is enabled
again when the storage tank temperature drops below the
limit temperature by 5K.
24 = Return flow temperature increase HS1
T-RETURN 1 = Return flow temperature from the
installation [= T-MF1 or 1-4].
ON: T-RETURN 1 < T-MF1 SETPOINT
OFF: T-RETURN 1 > [T-MF1 SEMF 1 HYST]
The return flow temperature increase pump is switched
on if the return flow temperature drops below the
temperature setting limit (T-MF1 SETPOINT). It is
switched off again when the return flow temperature
exceeds the temperature setting limit by the Hysteresis
(MF 1 HYST).
25 = Return flow temperature increase HS2
T-RETURN 2 = Return temperature of system
ON: T-RETURN 2 < T-MF1 SETPOINT
OFF: T-RETURN 2 > [T-MF1 SEMF 1 HYST]
The return flow temperature increase pump is switched
on if the return flow temperature drops below the
temperature setting limit (T-MF1 SETPOINT). It is
switched off again when the return flow temperature
exceeds the temperature setting limit by the Hysteresis
(MF 1 HYST).
26 = Return flow temperature increase HS via buffer
storage
ON: T-BUFFER B [F1] > T-MF1 +MF 1 HYST + 5K
OFF: T-BUFFER B < T-MF1+MF 1 HYST
The valve to the return flow temperature increase via the
buffer storage is opened if the temperature buffer storage
low [T-BUFFER B] exceeds the return flow temperature
of the installation [sensor 1 or 1-4] by the Hysteresis
(MF 1 HYST + 5K). It is switched off again when the
temperature buffer storage low drops below the return
flow temperature.
27 = Cylinder charging pump 1
(pump operates when the hot-water tank can be
charged by the solar system)
!
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 1 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-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]