CIAT HCompact2 HA Series - Checks at Centrifugal Fans; Interchangeable Position of Air Supply

HEAT PUMPS - AIR CONDITIONING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 12.65 D
9
Horizontal package air conditionners
HCompact2 HA
Pulley and belt adjustment
Both for the indoor circuit motorfans as well as the outdoor circuit are
coupled by pulleys and belts.
Pulleys must stay on the same plane
Tensor
screw
Pulley
screws
Taper pin
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.
These units can incorporate an auxiliary electric panel for optional
components such as: transformer for power supply without neutral,
transformer for damper of condensation pressure control and differential
pressostats for dirty fi lters and control of air fl ow.
Damper
transformer
Pressostat for
dirty fi lters
Pressostat for
fl ow control
Transformer for power
supply without neutral
Auxiliary
electric
panel
Interchangeable position of air supply
Both in the indoor air circuit as well as the outdoor circuit, the supply fan
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.
Fan panel is fi xed to pillars inside the machine, using 4 sheet-metal
screws Ø 3,5mm. The motor-fan assembly is fi xed to the base of the
machine with 4 rivet nut M8.
Fixation to the base
Access panel Supply panel
- 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 centrifugal fans