2N Door intercom 2N Helios - Manual, 1322 v3.0 - Manual (Page 23)

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Indoor areas with a low relative air humidity (e.g., hallways, offices
and other heated rooms).
Indoor areas where humidity condenses on walls but never flows
down the walls (porches, storage areas, industrial areas, e.g.).
Outdoor areas where protection against rain and water flowing
down the wall is provided (sheds, passages. e.g.).
Outdoor application means:
Environments where the product is exposed to rain or where water
may flow down the walls (fence, outer wall of a building, e.g.).
Caution
 The warranty shall not apply to product failures and defects caused by
improper installation (contrary to these instructions). The manufacturer is
neither liable for damages caused by theft within an area that is accessible
after the attached electric lock is switched. The product is not designed as
a burglar protection device except when used in combination with a
standard lock, which has the security function.
Surface Mounting
1. Drill holes using the enclosed template. Use the wall dowels attached.
2. With multiple module sets, connect the frames as shown in the figure. Place
the basic unit on the left and extender units on the right. The interconnecting
cable should be installed later!
3. Put the blanking modules on the unused side holes as shown in the figure.
4. If you are utilising a roof module, you should install it now.
5. Screw 2N® Helios onto the wall. Carry the supply cables (line, lock, power
supply) through one of the holes into the basic unit frame.