• Extra, separate temperature control circuit for after-heaters, etc.
• Extra control sequences Y4 and Y5 (in addition to Y1, Y2 and Y3) for free
integration into the controller output.
With control of:
• Heat exchanger (liquid connected, plate or rotating) or mixing dampers.
• Heating coil: Water with or without frost protection or electric with high
temperature limit switch.
• Cooling: Water or DX cooling in up to 3 steps.
• Circulation pumps for heating, exchanger and cooling.
• Recirculation dampers.
Fan control
• 1- or 2-speed supply air and extract air fans.
• Frequency controlled supply and extract air fans with pressure or flow control,
manual control or external control from a VAV system.
• Pressure controlled supply air fan with slave connected extract air fan (output
dependent or flow dependent) or opposite function (pressure controlled extract air
fan with slave connected supply air fan, output dependent or flow dependent).
Humidity control
Either humidification or dehumidification, or both humidification and dehumidification, can
be used.
Timer control
For starting and stopping the unit. Up to 5 timer outputs for control of external functions
such as lighting, door locks etc.
Demand controlled ventilation
In buildings with strongly varying occupancy the fan speeds or mixing dampers can be
controlled by the air quality measured by a CO
2
sensor.
Support control
When using the control function room control or extract air temperature control, it is possible
to utilise support-heating and/or support-cooling.
Free cooling
When this function has been activated it is used during the summer to cool the building
during the night by using cool outdoor air, thereby reducing cooling needs during the day.
Free heating
If the outdoor temperature is higher than the indoor temperature and there is a heating
demand, the recovery damper will not open for recovery but instead open fully for outdoor
air. This may occur during low night-time outdoor temperatures, when the room has been
cooled considerably and the outside heat is rising faster than indoors. This function is
activated at the same time as “Free cooling”.
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