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7.1 Three speed operation with COMANDO-S controller (accessory on request)
The unit runs at the speed selected by activating the two-position switches “S1”, “S2” and “S3” of the COMANDO-S (accessory
Fig. 5.g).
Factory setting of speed 1 is 40% (default): if needed it can be adjusted by turning the “V1” trimmer inside the terminal box.
Factory setting of speed 2 is 70% (default): if needed it can be adjusted by turning the “V2” trimmer inside the terminal box.
Speed 3 is the maximum speed achievable by the unit.
S3 switch allows to activate the bypass - see §7.3.
7.2 Anti-frost functionality
The unit is equipped with a thermistor which, when necessary, reduces the speed of the intake fan to prevent the freezing of the
heat exchanger, which could get damaged irreparably.
7.3 Bypass functionality
The SITALI CXOM 180 is equipped with a physical bypass which allows to mitigate the heat exchange when the indoor and
outdoor temperature combinates are such that the heat exchange is not recommended.
Bypass can be activated through a dedicated switch “S3” integrated into the COMANDO-S.
“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
Bypass
7 OPERATION
WARNING
Make sure that specific warnings and cautions in Chapter 2 “Precautions” are carefully read, understood and applied!
