Setting multi-function controllers (MFC)
49
•
Basic settings/MFC 1/ Mixer parameters (total actuating time, actuating time, cycle
time)
•
Program/MFC 1/Hysteresis
An example layout can be found in the document
Hydraulic layouts
.
6.16
Setting the "Valve" function (only MFC 2)
With this function you can boost the return line by valve in accordance with the calculated
maximum supply line setpoint temperature of the heating circuits.
The multi-function controller uses the currently highest supply line setpoint temperature
as reference and switches the valve in accordance with the source sensor (e.g. an external
heat source).
If the source rises above the HC supply line setpoint tempe hysteresis, the
function will become active and the valve will be actuated.
If the source drops below the HC supply line setpoint temperature, the valve will be
switched off.
For this function you can set the following parameters:
•
Basic settings/MFC 2/Source sensor
•
Basic settings/MFC 2/Output
•
Basic settings/MFC 2/Delayed off period
•
Basic settings/MFC 2/Link
•
Program/MFC 2/Hysteresis
6.17
Setting the "Storage tank cooling" function (only
MFC 3)
With this function you can cool the storage tank via a heating circuit.
No output is assigned to this MFC. If the temperature rises above the set storage tank start
temperature, the respective heating circuit pump will be switched on and the mixer
controlled accordingly. In this way the storage tank can be cooled when there is suprplus
solar energy, and stagnation of the solar power system can be prevented.
The function will end when the temperature drops below the set storage tank stop
temperature.
