9
7.1 Single speed operation
The unit runs at the speed set by turning the integral trimmer “V1” in the terminal box.
This is the default factory setting.
Wiring diagram: Fig.5.k – Dip switch configuration: 0000 (Fig. 5.q)
7.2 Two speed operation
The unit runs continuously at the speed set by turning the integral trimmer “V1” in the terminal box and can be boosted at high speed, which is set by turning
the integral trimmer “V2” in the terminal box. Boost is activated, when needed, by means of a remote two-position switch (not supplied) or by means of remote
sensors (SEN-HY, SEN-CO2 or SEN-PIR), which are accessories on request.
Wiring diagram: Fig.5.l – Dip switch configuration: 1000 (Fig. 5.q)
7.3 Variable speed operation with CTRL-M remote manual controller (accessory on request)
The unit runs at the speed set by turning the knob of the CTRL-M remote manual control panel (accessory, Fig.5.r).
Wiring diagram: Fig.5.m – Dip switch configuration: 0100 (Fig. 5.q)
7.4 Variable speed operation through external domotic (BMS) system or ballast potentiometer
The unit runs at the speed set by turning the knob of an external 1-10V ballast potentiometer or set by an external 1-10V signal from a domotic (BMS) system.
Wiring diagram: Fig.5.n – Dip switch configuration: 0110 (Fig. 5.q)
7 oPEratIoN
WARNING
Make sure that specific warnings and cautions in Chapter 2 “Precautions” are carefully read, understood and applied!
6.2 Before Starting the System
When the installation is finished , check that:
• Filters are mounted correctly
• The unit is installed in accordance with the instructions
• The unit is correctly wired
• Outdoor air intake is positioned with sufficient distance to pollution sources (kitchen ventilator exhaust, central vacuum system exhaust or similar)
• The unit is correctly set and commissioned.
7.5 Three speed operation with SEL-3V speed selector (accessory on request)
The unit runs at the speed selected by turning the knob of the SEL-3V speed selector (accessory, Fig.5.s).
Speed 1 is set by turning the integral trimmer “V1” in the terminal box.
Speed 2 is set by turning the integral trimmer “V2” in the terminal box.
Speed 3 is the maximum speed achievable by the unit.
Wiring diagram: Fig.5o – Dip switch configuration: 1000 (Fig. 5.q)
7.6 Three speed operation with CTRL-S controller (accessory on request)
The unit runs at the speed selected by activating the two-position switches “S1”, “S2” and “S3” of the CTRL-S (accessory Fig. 5.t)
Speed 1 is set by turning the integral trimmer “V1” in the terminal box.
Speed 2 is set by turning the integral trimmer “V2” in the terminal box.
Speed 3 is the maximum speed achievable by the unit.
S3 switch allows to activate the “free cooling “ operation (bypass) by reducing the intake airflow, so to mitigate the heat exchange when necessary.
Wiring diagram: Fig.5.p – Dip switch configuration: 1100 (Fig. 5.q)
7.7 Anti-frost functionality
The unit is equipped with a thermostat which, when necessary, reduces the speed of the intake fan to prevent the freezing of the heat exchanger, which could
get damaged irreparably.
“S1”
“S2”
Operation
O
O
OFF
I
O
Speed 1
O
II
Speed 2
I
II
Speed 3
S1 S2 S3
II
I
“S3”
Operation
Heat recovery
Free cooling
