Assortment / System Description

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• Control of boiler temperature with 1-stage, 2-stage or modulating burner
(3-position or DC 0…10 V with feedback signal)
• Acquisition of flue gas temperature, alarm when limit value is reached
• Maximum and minimum limitation of boiler temperature
• Maintained return temperature controlled via mixing valve (3-position or
DC 0…10 V), or with bypass pump
• Control of a shutoff valve, with feedback signal
• Selection of boiler operating mode
• Limitation of burner’s minimum on time and of the return temperature
• Protective boiler startup. Release of boiler, either automatically or manually
• Flue gas measuring mode (boiler test mode, "Chimney sweep" function)
• 3 fault signal inputs, preconfigured for over-/underpressure and water shortage
in the boiler or in the hydraulic plant
• Burner hours run counter and burner start counter
• Acquisition and evaluation of heat requests (external setpoint, external DHW
request, and frost protection via the KNX bus)
• Demand-compensated main control via mixing valve (3-position or DC 0…10 V),
or of the system pump in the main flow
• Minimum and maximum limitation of main flow temperature
• Shifting maximum limitation of main return temperature
• Maximum limitation of main return temperature during DHW heating
• Reception of heat meter pulses to limit the flow rate or the heat output
• Acquisition and evaluation of heat requests (external setpoint, external DHW
request and frost protection via the KNX bus)
• Demand-compensated main control via mixing valve (3-position or DC 0…10 V),
or of the main pump in the main flow
• Minimum and maximum limitation of flow temperature
• Shifting maximum limitation of return temperature
• Maximum limitation of return temperature during DHW heating
• Reception of heat meters pulses to limit the flow rate or the heat output
• Several DHW variants available:
– Storage tank charging via internal heat exchanger
– Storage tank charging via external heat exchanger, optionally with maintained
secondary temperature
– Storage tank charging with electric immersion heater
– Direct DHW consumption via heat exchanger. Downstream consumer control
(control of DHW temperature at the tap)
• Maximum limitation of return temperature
• Proof of flow with flow switch
• Reception of heat meter pulses to limit the flow rate or the heat output
• "Legionella" function
• 7-day program with maximum 6 switching points per day
• 7-day program with maximum 6 switching points per day for circulating pump
Boiler temperature
control
Main control
Precontrol
DHW heating