9
As far as possible, in any case, it is important to try and
reduce major thermal loads by the following means:
Large glass panes exposed to sunlight should be provided
with curtains on the inside or shades on the outside
(Venetian blinds, refracting films, etc)
The air-conditioned room should be closed as much as
possible.
Halogen spotlights or other electrical equipment with high
power consumption should not be used in the room
(toasters, steam irons, hot plates for cooking, etc.).
-
It should not be installed in a position where the
air flow can strike the people underneath directly
(fig 2).
-
It should not be directly over another appliance
(television, radio, refrigerator, etc.), or over a
heat source. (Fig 3).
CHAP 2.3
INSTALLATION OF THE UNIT (Low level)
2.3.1
Drilling the wall
This operation should be carried out using the proper tools
to facilitate your work and prevent excess damage or
disturbance to your client.
The best tools for drilling large holes in walls are special
drills called core borers with very high twisting torque and
adjustable rotation speed depending on the diameter of the
hole to be drilled.
To prevent the creation of large amounts of dust and rubble
due to drilling, the core borer can be fitted with a vacuum
system applied by means of suction cups to the drilling
zone.
Core drills and accessories are available from tool
suppliers to the construction industry.
To drill holes, proceed as follows:
Fasten the drilling template to the wall leaving the
necessary space from the ceiling, floor and side walls as
shown on the template. Use adhesive tape to fasten it in
place.
Use a small drill to punch to mark, with extreme care, the
exact centre of each of the holes to be drilled.
Using a core boring head measuring at least 152mm drill
the two holes for entry and exit of the air.
Note: The holes should have a slight downward
inclination to prevent any backflow of water from the
pipes (see fig 5).
Most of the removed material is expelled outwards,
therefore make sure that it does not hit any person or object
when it falls out.
In order to avoid as much as possible outer plaster
breaking, it is necessary to proceed carefully with the last
part of the hole executing decreasing pressure on the core
borers.
Summary of Contents for 91154AA
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