Assortment / System Description

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• Every sequence with modulating control (modulating output, step switch, mixed
air damper, heat recovery system) and 1 pump
• Up to 3 sequences acting on the same modulating control (e.g. priority cooling/
dehumidification)
• Room-supply air temperature cascade control with minimum/maximum limitation
of supply air temperature setpoint
• General limitation function (minimum/maximum) with PI control action of
sequence controller, either as absolute limitation (e.g. for supply air temperature
or humidity), or as relative temperature limitation (e.g. maximum limitation of
room-supply air temperature differential)
• Autonomous sequence controllers with P-, PI or PID control action
• Disabling of individual sequences depending on the outside temperature
• Demand-based ventilation, night purge
• Sustained heating and cooling modes
• Can also be used as differential controllers
• Fans
Control and monitoring of a supply and extract air fan with preselected
command, preselected command feedback and hours run meter.
– 1-speed fan (recirculated air operation possible)
– 2-speed fan (locking the second speed depending on the outside
temperature)
– Speed-controlled fan, including pressure or volumetric flow control
– Release of fan overrun time for electric heating
• Pumps
Control and monitoring of up to 4 single or twin pumps.
– Pump kick
– Permanent on command at low outside temperatures
– On according to load sequence controller or operating mode
– Plant stop in the event of pump fault depending on the outside temperature
• Heat recovery
– Maximum economy changeover of a heat recovery system
– Monitoring of efficiency of heat recovery system (with service messages)
– Release relay heat recovery system
– Anti-icing protection for the heat recovery system
• Mixed air dampers
– Maximum economy changeover of mixed air dampers
– Minimum position of mixed air dampers
– Startup and maximum position depending on the outside temperature
– Mixed air temperature control at a constant setpoint
• Linear step switch
Control of up to 3 aggregates by linear step switch
• Binary step switch
Control of up to 3 aggregates by binary step switch
• Variable step switch
Control of 2 aggregates by variable step switch with 6 or 4 steps
• Logic functions
4 freely configurable logic function blocks to logically connect input variables
• Frost protection
2-stage frost protection (modulating/2-position) or frost protection thermostat
(heating sequences delivering 100% output, hot water heating coil pump on,
fans off)
• Demand-based ventilation (CO2/VOC), acting on the air dampers or the variable
speed/multispeed fans
Closed loop
control functions (cont’d)
Switching and
monitoring functions