3Rd Step - Lifting And Positioning The Unit; 4Th Step - Assembly Of The Piping System - Carrier 50TCN120 Instrucciones De Instalación

3rd Step - Lifting and positioning the Unit

- Check the unit for possible damages during
transportation. Present any claim to the transport
company Do not let the unit fall. The unit must
remain in the vertical position during the hoisting
and moving operations. Rollers can be used to
move the unit along a roof. Level it taking the
unit structure as a reference. The unit base rail
has lifting holes, as shown on Picture 6. The
unit must be leveled for a proper draining of the
condensate; for that, the supporting surface or
the Roof Curb must be leveled before setting up
the unit in its position.
When installing the unit on a Roof Curb not
supplied by the factory, ensure the latter can
bear the additional weight.
All the panels must be at their positions when
the unit is hoisted.
POSITIONING – Keep a free space around and
over the unit to allow a minimum distance from
fl ammable materials and to provide a proper access
for services.
Put the unit on the Roof Curb in a way that the
following distances are kept: 7 mm between the
Roof Curb and the base rails on each side and in
front of the unit; 30 mm between the Roof Curb
and the rear of the unit.
Do not install the unit in an inside location. Do
not place the air inlets of the unit near fan grids
or near other sources of contaminate air.
Despite the unit being resistant to climate
conditions, keep it protected from water falling
from signifi cant heights. After the unit is in its
proper position, remove the packaging materials.
4th Step – Assembly of the Piping System - For
units with vertical discharge, fi x all the pipes to
the Roof Curb and to the building structure. Do
not connect the pipes to the unit. For horizontal
applications, the factory-provided fl anges should
be subject to the openings of the horizontal
discharge and to all the pipes subject to the
fl anges. Insulate and perform a bad weather test
for all pipes, joints and outside ceiling openings
with sealing material and putty, conforming to the
pertinent codes.
32
The piping laid in a non-conditioned space should
be insulated and covered with a vapor barrier.
In case a full return is used in a vertical unit, the
return should be led through the ceiling cover in
order to comply with all the applicable fi re codes.
For units with vertical discharge, it is not
necessary a free space for fl ammable materials
around the pipes. For units with horizontal
discharge it is necessary a 25 mm free surface for
the fi rst 305 mm of piping. The static pressure of
the return air to the cabinet should not exceed
-87 Pa (-.35 in.wg) with economizer or -12 Pa (-.45
in.wg) without economizer.
The unit is factory supplied either for the horizontal
air fl ow as well as for the vertical one.
Confi gure for the horizontal fl ow:
1. Remove the panels that close the
openings of horizontal supply and return
air (Picture 5).
2. Place the supplied fl anges to fasten the
piping.
Confi gure for the vertical fl ow:
1. Remove the panels that close the
openings of horizontal supply and return
air (Picture 4) so that you can have access.
2. Remove the panels that close the
openings of supply and return air located
on the unit fl oor (Picture 4).
3. Reposition the panels for the horizontal
fl ow openings.