Fan Service And Repair; Warranty; Maintenance Plan; Before Maintenance - S&P CXRT Series Operating Instructions And Maintenance

CXRT, GT

4. Fan service and repair

4.1 Warranty

The warranty is valid for one (1) year from the despatch
date from the factory unless otherwise agreed prior to
placing the order. The warranty is only applicable to
manufacturing defects. A precondition of warranty is that
regular maintenance has been carried out. Defects
under warranty must be reported immediately to the
manufacturer or importer. The warranty does not cover
bearing damages caused by over-tensioning of the belt.
The warranty does not cover work or indirect damages.

4.2 Maintenance plan

To guarantee smooth operation, the fan must be serviced
regularly. The need for servicing depends on operating
conditions. If the air contains a lot of impurities, the service
intervals will have to be shorter. As a general rule, the
fan must be inspected at least twice a year. For the most
important maintenance measures, see the following
sections.

4.3 Before maintenance

– Switch off the fan by the operating switch in the
control center.
– Also remove the fuses, when required.
– Before starting the fan service and repair, the power
feed must be cut off with the safety switch, which
should be locked out for the duration of the service work.
– Note! Small motors which are protected by an
automatic heat switch in the main circuit can start
running automatically.
– The safety switch must not be used as operating switch.
– Motor may be stopped with the safety switch only in
an emergency situation.

4.4 Belt drive (GT-3 and GT-5)

4.4.1 Inspection of V-belts

– Make sure that the fan does not rotate.
– Remove or loosen the fastening
bolts of the belt guard.
– Lift the guard off.
– Check the tension
of the belts.
Fig. 4.1 GT-3 025...071 removal of belt guard.
8
Service and repair

4.4.2 Adjusting the belt tension

Belt tension is adjusted by moving the motor.
GT-3 025...071 tensioning the belts:
– Loosen the motor slide rails' locking screws No. 1 (4 pcs).
– Adjustment of belt tension is performed with screws
No. 2 (2 pcs). If you want to tighten the belts, turn both
screws evenly clockwise. Loosening of the belts is
done counterclockwise.
– When the correct belt tension has been achieved,
tighten motor beam securing screws No. 1 (4 pcs).
– Then check the alignment of the belt pulleys.
1. motor slide rails securing screws
2. motor tightening bolts
Fig. 4.2 GT-3 025...071 tensioning the belts.
GT-3 sizes 080...100 tensioning of the belts:
– Loosen the four fastening bolts (No. 2) of the motor.
– Move the motor with the adjusting bolts (No. 3).
– If the threads of the adjusting bolts are not
adequate, loosen the slide rails fastening bolts and
move the slide rails to the next slot on the
tightening rail.
– When the correct belt tension has been reached,
tighten the motor fastening bolts.
– Then check the alignment of the belt pulleys.