Carrier 30PA, Installation, Operation And Maintenance Instructions

Page: 14 / 36

Ductable air-cooled scroll
chillers and heat pumps
14
Checks in the centrifugal fan:
STD version
- 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 curves of the fan and the room is
very important, so that the
fl
ows and pressures provided to the duct
network are as required.
- In case they are not aligned, remove the pulley screws, remove the
pulley and, after removing the taper pin, it can be slid 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.
Taper pin
Pulleys must stay on the same plane
Tensor
screw
Pulley
screws
Checks on the plug-fan:
HEE version
- 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 curves of the fan and the room is
very important, so that the
fl
ows and pressures provided to the duct
network are as required.
Pulley and belt calibration
Centrifugal motorfans are coupled with pulleys and belts. In this type
of fans, the following must be taken into consideration:
- 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.