Carrier 40 DMC Installationsanweisung Seite 29

Installation
Do not adopt configurations other than those indicated above, as
this may compromise the correct operation of the unit. In particular,
avoid operating the unit with just one aperture (see fig. 40).
Predisposition of the unit for circular front outlets
The unit is supplied with a front enclosure panel with 8" diameter
circular cut-outs (see fig. 41).
Before removing the cut-outs, cut the insulation on both sides of the
panel with a suitable knife. This facilitates opening and prevents
damage to the insulation (see fig. 42).
After removing the cut-outs, make certain that the insulation covers
all the parts in steel sheet (see fig. 43).
After removing the cut-outs, replace the front panel of the unit.Also
using the screws supplied (see fig. 44-45).
The area of the panel which can be used for fixing the 8" circular
flanges (not supplied) is as shown in the figure. Avoid drilling or
fastening screws in the shaded area of the figure so as not to
damage the unit's tray (see fig. 46).
Installation with side outlet
The unit is predisposed so that it can be installed in corridors to
make optimum use of the two circular outlets on the sides. In order
to prepare the unit for this type of installation, proceed as follows:
remove the two cut-outs in the sides of the unit (see fig. 47).
After removal, make certain that the insulation covers the steel
sheet around the cut area (see fig. 48).
The area which can be used for fixing the 8" circular flanges (not
supplied) is as shown in the figure.
Avoid drilling or fastening screws in the areas highlighted in the
figure so as not to damage the unit's tray (see fig. 49).
Unit specification graphs and
Refrigerant connection
Unit specification graphs
Warning! The unit is configured for three speeds, LO-ME-HI. On
installations in which it is necessary to set the speed S.HI (see
"electrical connections" section), the minimum counter-pressure at
the outlet must reach the value shown in the tables 53-54-55 (see
Refrigerant connection
Warning! Connect the indoor and outdoor units using copper pipes
with flared connections (not supplied). For the lines, use insulated,
unwelded, degreased and de-oxidised copper pipe, (Cu DHP type
to ISO 1337), suitable for operating pressures of at least 4200 kPa
and for a burst pressure of at least 20700 kPa. Copper pipe for
hydro-sanitary applications is completely unsuitable.
For sizing and limits (height difference, line length, max.
bends, refrigerant charge, etc.) see the outdoor unit
installation manual (see table V).
Flaring the pipe ends
Remove the protection caps from the ends of the copper pipes.
Hold the pipe with the end pointing downwards, cut off the excess
and remove any swarf with a burr removal tool (see fig. 56).
Remove the unions from the body of the "FLARE" connection of the
unit and slide them onto the pipes. Flare the end of the pipe with an
appropriate tool (see fig. 57).
Replace the front panel of the unit with the panel supplied
(see fig. 50-51).
Fresh air intake
There is a cut-out on the side of the unit, which can be used as a
fresh air intake. It can be opened with a screwdriver (see fig. 52).
Ducting
Important: the ducting must be designed and calculated by
qualified technicians.
Determine the dimensions of the ducts according to the air flow rate
required and the available static pressure of the unit (refer to the fan
diagrams on previous pages).
You are advised to adhere to the following recommendations:
• Regardless of the type of duct used, it must not be made of
inflammable material, which produces toxic gases in the event of
fire. The internal surfaces must be smooth and not contaminate
the air passing through them.
You are advised to use ducts in galvanised steel, suitably
insulated, to prevent the formation of condensate and thermal
losses.
• The ducts should be joined with flexible couplings which absorb
vibrations, prevent noise transmission inside the ducting and allow
access to the unit.
• As far as possible, avoid bends near the unit's air outlet. If this is
not possible, the radius of curvature must be as wide as possible;
use internal deflectors if the duct is of large dimensions.
The flare must be free from burrs and imperfections. The walls of
the flare must be of identical length (see fig. 58).
Lubricate the end of the pipe and the thread of the "FLARE"
connection with non-freezing oil. Tighten the union by hand for a
few turns and then tighten each connection with two wrenches, to
).
the torque shown in the table (see fig. 59).
Connecting the pipe to the unit
If the torque setting is insufficient, refrigerant fluid will leak from the
connection (see fig. 60-61).
Pipe diameter
mm
6.35
9.52
12.70
15.87
19.05
Once you have completed all the connections, check for possible
leaks using a leak detector specifically designed for HFC
refrigerants. Clad the pipes and taps with anti-condensation
insulating material and fix with adhesive tape, without compressing
the insulation too much. Any cuts or tears in the insulating material
must be repaired. The pipes and electrical cables connecting the
indoor unit with the outdoor unit must be fixed to the wall with
suitable ducts.
Torque
setting
inches Nm
1/4" 18
3/8" 42
1/2" 55
5/8" 65
3/4" 100
40 DMC 27