Assortment / System Description

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• Maximum 6 control systems with modulating control output (3-position or
DC 0…10 V) acting on …
– modulating burner,
– heating circuit with mixing valve,
– precontrol with mixing valve,
– maintained return temperature with mixing valve.
• Control of maximum 6 pumps (single or twin pumps, or combinations of them,
e.g. 4 single and 2 twin pumps)
Maximum 3 autonomous heating circuits with the following functions per circuit:
• Weather-compensated flow temperature control with own outside sensor
• Mixing or pump heating circuit
• Room operating modes:
– Auto Changeover between 3 setpoints according to time program
– Comfort Continuous heating to the Comfort setpoint
– Precomfort Continuous heating to the Precomfort setpoint
– Economy Continuous heating to the Economy setpoint
– Protection Heating to the Protection setpoint, if necessary
• Adjustable setpoints for the room operating modes
• Output of current operating mode via 2 relays (e.g. control of a third-party device
via time switch)
• 7-day program (6 switching points per day)
• Holiday and special day program:
– Selectable room operating mode for holiday periods
– Time program for special days
• Adjustable room influence
• Optimum start and stop control
• Boost heating and quick setback
• Room model for room functions without room sensor
• Automatic heating limit for demand-dependent control of heating system with
adjustable heating limits for Comfort and Economy mode
• Automatic changeover to summer operation (heating off)
• Maximum limitation of room temperature
• Minimum and maximum limitation of flow temperature
• Limitation of rate of increase of flow temperature
• Outside temperature simulation for testing the outside temperature-dependent
functions
• Outside temperature-dependent frost protection for the plant
• Remote control:
– Remote setpoint adjuster with relative or absolute room setpoint readjustment
– Multifunctional room unit QAW740 for various heating circuit functions
– External contacts for operating mode changeover, "Timer" function, etc.
• For all heating circuits:
– Adjustable solar and/or wind compensation
• Raising the reduced room temperature when outside temperature drops
• Outside temperature-dependent constant-shifting-constant maximum limitation
of return temperature
• Reception of heat meter pulses to limit the flow rate or the heat output
Control loops and
control outputs
Heating circuit control
District heating
functions