Interchangeable Position Of Air Return; Air Ducts Connections; Condensate Drain Connection - Carrier 50HB Manual

Horizontal package air conditionners

Interchangeable position of air return

Both in the indoor air circuit as well as the outdoor circuit, the return
panel can be located in either of the two positions indicated in the
following illustration, since both panels are easy interchangeable.
This means it can be fi tted on-site in accordance with the installation
requirements.
The panel with the return grille is fi xed to pillars inside the machine,
using 4 sheet-metal screws Ø 3,5mm.
Access
panel
Interchangeable panels

Air ducts connections

The air supply and return ducts must be calculated in accordance with
the rated fl ow and the unit's available pressure(refer to the technical
characteristics table). The duct calculation and design must be made
by qualifi ed technical personnel.
It is advisable to take into consideration the following recommendations:
- Bends in the fan discharge supply must be avoided. It is recommendable
to have a straight section of duct measuring approximately 1 metre.
If it is not possible, they must be as smooth as possible, using indoor
defl ectors when the duct is of large dimensions.
- When making the ducts, direction sharp changes must be avoided
since they can generate occasional pressure drops, which affect the
available pressure and the fl ow. The location of supply and aspiration
grilles must be studied carefully to avoid the air recirculation and the
transmission and generation of noises to the interior.
- Flexible connections must be made between the ducts and the unit
that avoid the noise and vibration transmission.
- No matter the type of ducts type to use, they must not be composed
of materials that propagate fi re nor expel toxic gases in the event of a
fi re. The internal surfaces must be smooth and should not pollute the
air that circulates within them. In any case, the effective legislation
about this issue must be respected.
Caution: These units are designed to be connected to a duct
network. If the indoor circuit outlet fan is accessible from a
particular point in the duct network, the installer must fi t a
protection mesh in the discharge as per the current regulation.

Condensate drain connection

All models are provided with two condensates drain pans, one in the
indoor circuit and another one in the outdoor
circuit, with asphaltic paint and independent
drains. Female drain joint, made of bronze,
gas thread
Indoor circuit
Return
Siphon installation norms
panel
- Check that the condensate outlet is not clogged.
- All water drain tubes must be provided with a siphon to avoid bad
smell and water spills.
Perform the assembly as per the scheme of the attached starting
diagram:
Pan in overpressure: it is installed to avoid the access through the
drain tubing of bad smells.
Pan in underpressure: besides the previous application, water must
be sucked from the pan:
• For the correct siphon design, the "A" height must be at least twice
• The drain tubing must be slightly sloped to ease circulation towards
• The original diameter of the tube must be respected. No reduction

3/4".
Outdoor circuit
Do not connect the drains, make the siphons independent.
that of the underpressure where the condensates pan is placed.
the drain.
can be made.
Condensates pan
in depression
Check the connection tightness.
CONNECT SIPHON
METTRE SIPHON
PONER SIFON
V220014
Slight slope
5/1000
To drainage
Siphon drain
11