4
CVS-21HA.rev.03
The controller supplies MAXIMUM VOLTAGE DURING 2 SECONDS
at every variable speed fan start-up, in order to overcome the inertia
of the ventilation system components and de-ice the fan blades in cold
weather conditions.
When used with a computer communication module, the controller
COMMUNICATES WITH A COMPUTER. This makes possible the cen-
tralization of information management and a more diversified control
stategy.
When used in combination with a WR-F-1A controller, the CVS-21HA
COORDINATES THE MOVEMENT OF THE AIR INLETS WITH THE
OPERATION OF THE FANS. This allows the air inlets to be adjusted
correctly, free of the influence of noncontrollable factors such as wind
or air from adjoining rooms.
The controller generates an output signal that will activate any ALARM
system in case of a rise or fall in temperature beyond a specified limit,
a power failure or a fault in the supply circuit.
A DE-ICING CYCLE is provided for de-icing stage 2 variable-speed
fans in cold weather conditions.
