Dantherm Flexibox 810 indoor Service Manual page 6

Product description,
Cooling
operation
4
continued
The Flexibox controller continuously monitors the inside as well as the outside air tem-
perature, and select appropriate operation mode accordingly.
Mode
External heating If the inside temperature is lower than the heat setpoint ("Heater
SetPt.") parameter, any external heater connected to the Flexibox,
will be activated.
Free cooling If the inside temperature is higher than setpoint, the internal fan of
the Flexibox starts up slowly, and increases/decreases speed, to
maintain the setpoint temperature.
Free cooling operation is dependent on a lower outside than inside
temperature.
In Free cooling operation, the damper will open, to emit warm air to
the outside surroundings.
External If the inside temperature is higher than setpoint, and outside air is
AC cooling higher than inside, minus the temperature delta of 3° by default, the
Flexibox will change to external AC mode, if connected.
In this operation mode, the damper is closed.
Alarms The controller can issue various alarms, on any of the two alarm
connections. This can be set up in the configuration. See more at
page 26
By default the alarms is setup to:
• Alarm output 1 is operation error alarms, that needs immedi-
ate attention
• Alarm output 2 is activated by the filter surveillance. This
doesn't need immediate action, and could be handle as an
warning
Description
Continued overleaf