General - Electra DNC series Service Manual

INSTALLATION MANUAL
2.

General

Only a professional technician, who went through an appropriate training by the company, may
install the air-conditioner. Installation must comply with the Company's specs, according to the law
of electricity, while using the Company's standard components such as tubes, ducts, electric power
cables and other necessary accessories.
Installation instructions relate to DNC air-conditioners that are comprised of two components: the
indoor unit and the outdoor unit. The two units are interconnected between them by two refrigerant
tubes, electric power cable and a control cable.
Hereby are recommendations to perform a correct installation of DNC air-conditioners:
•
Thermal load assessment for the structure must be carried - out.
•
Short refrigerant tubes with minimal bending.
•
Capacity loss of 0.3% for each meter of tubing - beyond the first 7 meters, must take into
account.
•
Ensure free flow of return air from the air-conditioned area into the return air grille, as well
as from the return air grille to the inlet of the indoor unit. This route must be free of
obstruction and must not pass through non air-conditioned areas.
•
Use only the supplied distribution flaps and return air grilles of correct sizes, according to
the Company's recommendations.
•
In systems with connecting ducts:
- Use deep adapters only (220 mm - at least) to connect air supply grilles and flaps.
Attention!
Below are listed frequent installation problems. It is highly recommended to relate to them before
planning and performing the installation, in order to prevent them.
A. Lack of appropriate openings for returning air. Returning air via an open door is a bad
solution!
B. Openings and passages to non-air-conditioned floors, or even to places open outdoor
air.
C. Incorrect allocation of air quantities among rooms.
D. Using incorrect air supply grilles - there is no possibility to direct the distribution of air as
required.
E. De-icing of the thermostat is inactive - no telephone line was installed between the
outdoor and the indoor units.
F. Lack of fresh air in a public place.
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