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User’s Manual
10
2.6. INDICATION OF OPERATING MODE
The following modes can be displayed in Current mode
fi
eld in the main menu: Auto..Off..Low..
Econo..Comfort as described above
Fire
– operating mode enabled by
fi
re alarm input. All the devices switched off, the fans stop or run
with selected setpoint (see chapter Service Menu)
OverRun
– AHU switches off, but the fans keep running on the idle speed until the heater is cooled
down (see chapter Service Menu)
NightClg
– Night Cooling – a mode for energy saving by cooling down the room using cold air from
the outside in the night. Available only in the units with external temperature sensor.
Standby
– protection mode for min/max room temperature – if the temperature exceeds speci
fi
ed
setpoints, AHU is switched on, to heat up or cool down to desired range. Then switches off again.
NightKick
– testing mode, that forces fans to run in order to exchange the air in the ventilation
system.
Note!
Night cooling and Standby functions rely on room temperature. If there’s no measurement in
the room, the exhaust duct sensor is taken into account and gives the readout. This requires turning
on the fans to have appropriate room temperature value on that sensor.
InitHtg
- Initial Heating - a mode for startup of water heating units in winter conditions, heats up the
coil before starting the fans in order to prevent activation of frost alarms.
Startup
- temporary mode when dampers are opening, fans speed up and the heating / cooling
devices are enabled and start operation.
FastHtg / FastClg
- Fast Heating or Cooling - special mode for units with PCR or RRG recovery, that
allows operation with closed intake/outlet dampers and full recirculation. That improves heating up
the building.
Heating
- mode when heaters can be enabled
Cooling
- mode when coolers can be enabled
Vent
- Ventilation - energy saving mode, when neither heaters nor coolers are enabled and the unit
operates only with ventilation and optional recovery unit.
EmgStop
- Emargency Stop - unit forced to stop immediately, according to signal from optional
digital input.
AlrStop
- Alarm Stop - unit forced to stop because of an alarm
CrtStop
- Critical Stop - unit forced to stop because of a critical alarm
Con
fi
g
- unit forced to stop because the controller is in Con
fi
g mode. Conatoller must be con
fi
gured
fi
rst and switched to Running mode
The unit can be controlled from several sources. Mind the priorities between them.
1. HMI Advanced (highest priority)
2. The BMS over Modbus TCP/IP connection
3. External control inputs
4. HMI Basic
5. The calendar mode
Note! To enable another sources than the HMI Advanced, the Operating mode HMI must be set to
Auto