Installation And Start-Up; Fan Installation; Electrical Connection; Safety Equipment - S&P CXRT Series Operating Instructions And Maintenance

CXRT, GT

3. Installation and start-up

Plan out the installation of the fan and ductwork before
starting work. Avoid sharp duct bends and changes
before inlet opening, especially near the outlet opening.
The flow has not yet equalised in the fan outlet opening.
Fig. 3.1 Minimum safe distance behind the outlet
opening. Do not install an angle duct piece
immediately after the fan outlet opening. Use a short,
straight duct allowing the flow to equalise.
When installing the fan, the service area requirement
must be noted as follows:
CXRT (standard construction)
– When replacing the motor, it must be possible to
remove the impeller lockingscrew.
GT-3
– Bearing replacement from both sides of the fan and
especially space requirement for inlet side bearing
replacement.
GT-5
– Bearing replacement from both sides of the fan.
If the inlet opening has been ducted, ensure that you
can replace the bearing by removing the flexible
connection duct and part of the inlet ducting or that you
can move the fan as a unit towards the service space.
Fig. 3.2 Space reservation for bearing replacement.
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A
Installation instructions

3.1 Fan installation

Fans are normally installed on vibration dampers
(optional accessory), which are fastened with bolts in the
installation holes of the base frame. The fastening
platform must be even and sufficiently sturdy. When
performing an installation, ensure that there are no
bending forces or other mechanical tensions affecting
the fan.

3.2 Electrical connection

Electrical connection must be carried out by an
authorised electrician. The fan must have an operating
switch and a safety switch which can be secured for the
duration of the servicing. Electrical connections must be
carried out in accordance with respective national
regulations and instructions. Ensure that the motor cable
is long enough so that the motor can be moved freely
when tensioning the belts. The cable should be rubber
insulated. When using frequency transformers, the
cabling instructions of the frequency transformer
manufacturer must be followed.

3.3 Safety equipment

The fan complies with the EU Council machine directive
and EN 294:1992 standard regulations concerning
contact protection. These regulations must be followed
in any fan installation. An open pressure or inlet opening
must be protected by an inlet guard (optional accessory).
After servicing, ensure that all the guards, including the
belt guard, are properly in place. Machine rooms should
be kept locked so that non-authorised persons cannot
access them.

3.4 Fitting accessories

The fan should normally be connected to ducting by
means of a flexible connection duct. The tightness of the
flexible connection duct must be adequate and there
must be no bends that could choke the air flow. Check
that the flexible connection duct is in alignment with
the fan outlet and the ducting. Before installing the
counter flange, fit a gasket (e.g. 2 x 10 mm) to one
flange of the flange joint. After this, assemble the flange
joint. Separate operating instructions are included with
the air flow sensor (optional accessory).

3.5 How not to install the fan

The fan must not be mounted with the shaft vertical.

3.6 Inspection after the fan has been installed

Rotate the shaft and check that the impeller does not
come in contact with the inlet cone and that the bearings
do not make any unusual noise. Make sure that there
are no foreign objects in the fan or in the ducting.

3.7 Measures to be taken before starting

If the fan has an impeller with forward curved blades
(type GTLF), make sure before starting that it has been