11
Free-AIr-3-IN
© STULZ SpA – all rights reserved EN/02.2018
INFOrMATION
To get a cooling effect from Free-Air-3-IN working, it is absolutely necessary that outside
temperature is lower than inside temperature.
Free-Air-3-IN units must not be installed and used in other positions than the one for which they
have been designed. STULZ is not liable for any damage resulting from non-compliant installations.
The operator bears the entire risk.
Non-intended use
The unit cannot be installed on movable, vibrating, oscillating, tilted (non-levelled) parts.
Generally, unit cannot be installed in the following areas:
• With strong heat radiation
• With strong magnetic fields
• With free flames
• With fire risk
• With inflammable products
• With explosive atmosphere
• With saline atmosphere
• With aggressive atmosphere
For any doubt, please consult the manufacturer.
With Free-Air-3-IN units the following site configurations are possible:
1. FCL stand-alone
• Free cooling made by FCL. Working logic: FCL control (C102)
2. FCL + one electrical heating connected to FCL
• Free cooling made by FCL. Working logic: FCL control (C102)
• Electrical heating. Working logic: on-off control by FCL (C102)
3.2. Component lay-out
External fresh air intake is from the rear side of the unit. Sucked by the fans, situated in the upper
and in the lower part of the unit, air passes through the filter, located immediately after the fresh air
intake opening. Air discharge grilles are located after the fans in the frontal side of Free-Air-3-IN.
Electrical and control components, as well as electronic controller and connectors of I/O to the
controller, are located inside a separate box behind the frontal panel. The keypad, connected to
the electronic controller, is located on the frontal panel and it displays information about operating
conditions, the state of the unit and alarms. Holes for power supply, probe and signal cables, are on
the right side of the roof of the unit.