EN/07.2013/58/99
TI ≤ S01+M136: The damper is closed and the fans speed is set to 0 %.
S01+M136 ≤ TI < S01+M31*S06: Recirculation mode.
S01+M31*S06 ≤ TI < M151: Freecooling mode is enabled if M40 < TAE < M41, TI-TAE > M39,
Internal humidity < S05+M68*S08. In freecooling mode the fans speed is set equal to the
parameter M88 and the damper is fully open. If there are not the conditions for freecooling
mode, the unit works in recirculation mode.
TI ≥ M151: Freecooling mode is enabled if TI-TAE > M152. In freecooling mode the fans speed is set equal to M88 and
the damper is fully open. If there are not the conditions for freecooling mode, the unit works in recirculation
mode.
The auxiliary mode has a higher priority than the emergency mode for the control of the evaporator fans.
Emergency mode
The parameters involved are:
– M151 EMERGENCY TEMPERATURE: pre-set = 33 °C
– M152 DIFFERENTIAL TEMPERATURE IN EMERGENCY MODE: pre-set = 1 °C
– M153 ENABLE DAMPER IN EMERGENCY MODE: pre-set = NO
TI ≤ S01+M136: The damper is closed and the fans speed is set to 0 %.
S01+M136 ≤ TI < S01+M31*S06: Recirculation mode.
S01+M31*S06 ≤ TI < S01+M55*S06: Freecooling mode is enabled if TAE > M40, TAE < M41, TI-TAE > M39.
If there aren’t the conditions for freecooling mode, the unit works in recirculation
mode.
S01+M55*S06 ≤ TI < M151: By parameter M153 it’s possible to select if the damper must be open or closed.
The fans speed is set equal to 100%.
TI ≥ M151: Freecooling mode is enabled if TI-TAE > M152. In freecooling mode the fans speed is set equal to 100% and
the damper is fully open. If there are not the conditions for freecooling mode, the unit works in recirculation
mode.
Alarms
• Group refrigeration: replaces the current group “common warning”
• Group general alarm: replaces the current group “common alarm”.
• Compressor thermic
The alarm reset is automatic.
It’s possible to connect the alarm to a relay and/or to associate it to “group refrigeration” or to “group general alarm”
relay. The status of the unit when this alarm occurs is “emergency mode”.
• High temperature
It’s possible to connect the alarm to a relay and/or to associate it to “group refrigeration” or to “group general alarm”
relay. The status of the unit when this alarm occurs is “emergency mode”.
• High pressure
The alarm reset is automatic.
It’s possible to connect the alarm to a relay and/or to associate it to “group refrigeration” or to “group general alarm”
relay. The status of the unit when this alarm occurs is “emergency mode”.
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