Carrier 50EH 1100, Installation, Operation And Maintenance Instructions, Page: 9 / 36

9
7.1 Choice of location
When choosing the location, whatever may be the selected
fashion, the following precautions have to be taken into
consideration:
● It is mandatory to comply with norm EN 378-3 on Safety and
Environmental Requirements. Part 3: “In situ” installation and
protection to people.
● It is necessary to check that the structure supports the unit’s
weigh (please consult the weight in paragraph “ Weight
overview”).
● The area where the unit will be located must be perfectly
accessible for cleaning and maintenance operations (please
consult the “Recommended service clearance”). Leave
enough space for air circulation around the unit.
● Since the unit is designed to work outdoors, some specifi c
installation norms must be followed:
- The unit will be located on the roof of the premises. If it is
foreseen that it will work more on heating than on cooling, it
is preferable to direct the coil towards the sun. If little work
on heating is foreseen, choose North direction.
- Avoid placing obstacles in the air supply or return. No
obstacle may impede the air aspiration into the coils. Do not
fi x the outdoor coil side in the predominant wind direction.
- Do not install the unit in a closed enclosure or in conditions
that originate air recirculation.
- The chosen location must not fl ood and must be above the
average height the snow reaches in that region.
7 - POSITIONING AND INSTALLATION
Foresee appropriate damping devices in these fi xings
to ensure that noise and vibration transmission
is avoided (refer to the section “Anchorage for
antivibrators”).
Antivibrators assembly (silent-blocks)
Although the installer is the one who must decide on a case-by-
case basis the best way to place the unit in the ultimate location,
Preassembly roofcurb (optional)
Optionally, standardised pre-assembly roofcurb made of
galvanised steel panelling with polyester paint and thermally
insulated with adjustable heights can be supplied.
Preparation of the ground
It is necessary to ensure that the surface where the unit is going
to be installed in completely fl at. Any defect in the preparation of
the unit support surface translates into stresses on the structure,
which may result in its deformation. The unit must be perfectly
level when installed.
These units can be installed on the fl oor or on a brick curb or steel
profi le. Based on the fi xing solution defi ned in the installation
project, it will be necessary to plan the placement in the base of
threaded rods in the expectation that the unit supports can be
fi xed later on. To do so, it is recommended that a template be
made with the heights corresponding to the fi xings.
This image shows how
the silent-block option
that can be supplied for
this unit is fi xed to the unit.
Levelling
system
Important: All of the necessary information for the installation of
these roofcurbs is available in the specifi c instruction brochure
on roofcurbs, No. 12.62 (supplied with the roofcurb).
Sound Level
These units are designed to work with a low acoustic level. In any
case, the following must be taken into account for the design of
the installation: the outdoor environment for acoustic radiation,
the type of building for the noise transmitted by air, the solid
elements for the transmission of vibrations.
To reduce transmission through solid surfaces to the maximum, it
is very advisable to install shock absorbers between the ground
or structure and the unit frame. If necessary, a study must be
commissioned to an acoustic technician.
Note: Sound levels can be found in the technical brochure of
this series.
always in observation of the handling standards that have been
described, below is a proposed assembly sequence that may
facilitate the operation, keeping in mind that the sequence
performed in the installation shall be the one most suitable to the
solution chosen for each particular case based on the existence
(or lack thereof) of brick frames, type of silent-blocks used, etc.
In the event of assembling directly on silent-blocks to the ground,
it is recommended that a template of the unit’s footprint with the
anchoring points of the silent-blocks be made, as described in
the paragraph “Preparation of the ground”.
With the help of the crane or the forklift truck, the unit will be
raised to a suffi
cient height that the silent-blocks can be screwed
into its base. The 4 silent-blocks of the corners must remain
oblique and the interiors perpendicular to the unit.
M12 metric threads have been provided for their placement in
the supports indicated in the following section “Anchorage for
antivibrators”. A hex key 19 or Allen wrench 10 will be used for
this operation based on the type of screw used.