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Mod. Offset
At modulated heat request the requested temperature can be increased by the value adjusted here.
14-day Reference
If operating mode 14-day reference value‘ is selected See " Operating mode " on page 19, the reference flow temperature for each of
the 14 days can be set here. Under 4.1.1. the starting time of the program is shown. To restart the program, press ‚restart‘.
Pressing restart again will reset the 14-day reference program and restart it at Day 1.
6. Protective Functions
The 'Protective functions‘ can be used by specialists to activate and set various pro-
tective functions.
By no means does the controller replace the safety appliances on site!
Seizing Protection
If the anti-seizing protection is activated (daily, weekly, off), the controller switches the heat pump and the mixer on/off at 12:00 noon for
5 seconds to prevent seizing of the pump/valve after long periods of inactivity.
Frost Protection
If the external temperature on sensor S1 goes below 1 °C and the heating circuit is turned off, the heating circuit will automatically be
turned on if the frost protection is activated and the reference flow temperature is set at the minimum flow temperature set under See "
Min. Flow " on page 22. As soon as the outdoor temperature exceeds 1 ° C, the heat circuit is switched off again.
Switching the frost protection function off or setting the minimum flow temperature too low can lead to severe damage to the
system.
Min. Flow
The minimum flow temperature is the lower limit of the heating curve, and by this, the reference flow temperature of the heating circuit. In
addition to that, the minimal flow temperature is the reference flow temperature for the frost protection function.
Max. Flow
This value is the upper limit of the reference flow temperature of the heating circuit If however, the temperature of the heating circuit
exceeds the set value, the heat circuit shuts down until the temperature falls below this value. After 55 seconds, rinse for 5 seconds.
The customer must provide an additional limiting thermostat which is connected to the pumps in series (eg underfloor heat-
ing) for safety.
Discharge Protection
When the buffer discharge protection is activated, the heating circuit pump switches off as soon as the set minimum flow temperature is
not reached although the mixer is fully open. Every 5 minutes, the system checks if the flow temperature has been reached.
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