8
Vertical package air conditionners
The air outlet 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 outlet 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 discharge
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 connect 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.
Air ducts connections
- Before commissioning, check the blade rotation direction and that
the axis turns without strokes nor vibrations
- Once running, check the operation conditions: pressures, fl ows and
consumptions.
- The coupling of characteristic bends of the fan and the room is
very important, so that the fl ows and pressures provided to the duct
network are as required.
Checks at fans
Pulley and belt adjustment
Both for the indoor circuit motorfans as well as the outdoor circuit are
coupled by pulleys and belts. In this type of fans, the following must
be taken into considerations:
- The pulleys must be on the same plane, so it is important to check
them with the help of a ruler or a laser aligner.
- In case they are not aligned, remove the pulley screws, remove the
pulley and, after removing the hub pin, it can be slided over the axle
(this action can be performed both in the motor as well as in the fan).
- After fi xing the pulleys on the same plane, the belt tension is made
by tightening the tensor screw.
- The belt tension must be checked after 24 hours of motor operation.
Attention:
Before performing these operations, it is necessary to verify
that the unit is disconnected from mains.
Pulleys must stay on the same plane
Tensor
screw
Pulley
screws
Taper pin
Condensate drain connection
CONNECT SIPHON
METTRE SIPHON
PONER SIFON
V220014
All models are provided of two condensates drain pans, one in the
internal circuit and other in the external circuit,
with independent drainages. Drainage pipe, in
bronze, gas thread M3/4”.
Installation norms
- Check that the condensates outlet is not obstructed.
- All water drain pipes should be provided with a siphon to avoid bad
odours and water overfl ows.
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