BrookVent AF 90-CYC-ONE-100, Installation, Maintenance & User Manual

Page: 9 / 20

8/19
4.0 Operation
In both versions, the unit extracts air out for 70 seconds, then it supplies air in for the
same time. When heated air is pulled (extracted) from inside the room, it warms up the
heat exchanger; when the cold air is pushed (supplied) in the room, it gets preheated,
recovering most of thermal energy which would be otherwise lost in the ventilation
process.
The unit runs at the speed selected by activating the switches “S1”, “S2” and “S3” of the Air
Controller (accessory fig. 57). The same functionality can be achieved with Air Controller
or with 3 switches.
S3 switch activates the “Free cooling“ (Bypass) mode, which stops alternate flow and
keeps the fan in “extract
- only” or “intake - only” mode, to avoid the heat exchange when
necessary. To set the “ extract- only” mode or “intake - only”, place the integral jumpe rs as
per fig. 20A -20B. The front cover LED indicates when the Free cooling mode is on.
An automatic “Boost”mode can be achieved through a dedicated switch or room sensors
like humidity sensor, CO2 sensor, PIR sensor, connecting such switch in parallel to the S2
switch.
Wiring diagram of one unit: fig. 18A.
Wiring diagram with ambient sensors: fig.18B -18C.
Wiring diagram of two or more units: fig. 18D.
WARNING :
Ensure that the electric wiring to L and N is done correctly; an incorrect connection will
lead to malfunction or permanent damage of the fan.
4.1 Synchronisation
When the units are installed in pair, they must be synchronised so that when one unit is
extracting, the other is supplying, and viceversa (fig. 18E -18F-18G). This is achieved by
setting th e dedicated jumper (fig. 20A -20B).
RESET OF THE SYNCHRONISATION
OPTION 1 : If two or more units are connected under the same main switch, to reset the
synchronisation, the main switch must be switched first OFF and then ON to reactivate
(fig. 31).