5
In both versions, the unit pulls air out for 70 seconds, then it pushes 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 two-position switches “S1”, “S2” and “S3” of the CTRL-S (accessory Fig. 64). The same
functionality can be achieved with CTRL-S or with 3 two-position 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 jumpers as per Fig.21A or Fig.21B).
The front cover LED indicates when the Free cooling mode is on.
The speed increase can be automatically achieved through room sensors like SEN-HY, SEN-PIR or SEN-CO2, connecting such switch in parallel to
the S2 switch.
Wiring diagram of one unit: Fig. 19A.
Wiring diagram with ambient sensors: Fig.19B and Fig.19C.
Wiring diagram of two or more units: Fig.19D.
VERSIONS
“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
(Alternate flow)
Free cooling
OPERATION
• Do not leave the device exposed to atmospheric agents (rain, sun, snow, etc.).
• Do not immerse the device or its parts in water or other liquids.
• Turn off the main switch whenever a malfunction is detected or when cleaning.
• For installation an omnipolar switch should be incorporated in the fixed wiring, in accordance with the wiring regulations, to provide a full
disconnection under overvoltage category III conditions (contact opening distance equal to or greater than 3mm).
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a
hazard.
• Do not obstruct the fan or exhaust grille to ensure optimum air passage.
• Ensure adequate air return/discharge into/from the room in compliance with existing regulations in order to ensure proper device operation.
• If the environment in which the product is installed also houses a fuel-operating device (water heater, methane stove etc., that is not a “sealed
chamber” type), it is essential to ensure adequate air intake, to ensure good combustion and proper equipment operation.
STANDARD
External grille in high quality, impact and UV-resistant ABS colour RAL 9010.
PRO
External hood in aluminium, painted in white (RAL 9010), acoustically lined.
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
Two or more units can operate at a fixed speed in a synchronised way (one unit extracts, the other supplies, and viceversa). Wiring diagrams: Fig
19E-F-G.
The initial starting air direction is achieved by setting the dedicated jumper (Fig. 21A-21B).
RESET OF THE SYNCHRONISATION
OPTION 1
If two or more units are connected under the same main switch or under a dedicated switch, to reset the synchronisation, the switch must be
switched first OFF and then ON to reactivate (fig.38)
OPTION 2
If two or more units are
not
connected under the same main switch, to reset the synchronisation, press at the same time the black pin of each
unit (fig.40) for at least 3 seconds.
SyNCHRONISATION IN CASE OF INSTALLATION WITHOUT CONTROLLER
If two or more units are controlled by means of the same controller (149-SEN-CTRLS or similar), they always operate in a synchronised way.
Wiring diagram as per Fig. 19D.
SyNCHRONISATION IN CASE OF INSTALLATION WITH CONTROLLER
