Section 4 – Installation
4.5.2 Connecting the ventilation unit to the power supply, external
sensors and heaters
Fig. 4.6a Cable inlets on the Natural Air 180 unit
Fig. 4.6b Cable inlets on the Natural Air 350 unit
Key to parts :
1 Cable inlets for sensors
Remove a grommet and
make a suitable hole
through the exposed EPP
insulation to the wiring
chamber.
2 Cable inlet for power supply
On all 350 models the mains
supply connection is made
inside the Power outlet
termination box.
3 Pre-heater, Power outlet *
4 Boost-heater, Power out *
* Only available on PH Models
Wiring power supply to Main terminal block:
NOTE!
The installer must fit the power connection with an all-pole mains switch with a contact separation
of at least 3 mm.
WARNING:
Install and secure the mains cable through the cover cable gland. Ensure that the bare cable ends
are correctly and tightly secured into the mains supply terminal block.
WARNING:
Electrical connections must be installed by a qualified technician in compliance with all safety rules
for electrical equipment and with all applicable standards and local regulations as well as in
accordance with the installation manual. Before starting any work on the unit, the power supply
must be disconnected in order to prevent any electrical hazard.
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