KOJA Future Series - Belt-Driven Fans

AIR HANDLING UNIT FUTURE
INSTRUCTIONS FOR OPERATION AND MAINTENANCE
Air ow meter FIZM
2017-02-13 V. 2.0 47
14.1.2. Belt-driven fans
Failure or problem
1. Broken belt.
2. A soft, stretching area in a belt.
3. Belt/belts turn in the grooves.
4. Drive is noisy or vibrates.
5. Belt sides wear quickly.
6. Scratched or slightly torn belt sides.
7. Soft belt sides, burnt rubber stuck in the grooves.
8. Torn and/or cracked belt sides.
9. Scratched and torn outer surface.
10. Sticky and lumpy belt surfaces, loose rubber on the belt and pulleys.
11. Hard belt surface, cracks on the bottom rubber side.
Cause Acon Failure/problem
1 2 3 4 5 6 7 8 9 10 11
Loose belts Replace and ghten
according to the instrucons.
X X X X X
Belts at dierent depths in
the grooves, worn pulleys
Replace the pulleys and
belts.
X X X X X
Belt forced in the groove Install new belts, according
to the instrucons.
X X
Hard parcles in the grooves Check the guards, replace
the belts.
X X
Belts unequally tensioned Follow the installaon
instrucons.
X X X X X
Belts are of dierent lengths Check the product codes,
replace the belts.
X X X X
Cracks or aws in the grooves Replace the pulleys and
belts.
X
Belt touches xed structures Check the space, replace
the belts according to the
instrucons.
X X X
Dust gets in the drive Check the guards, replace
the belts and pulleys.
X
Drive is under-dimensioned Redesign the drive. X X X X
Pulley is too small Redesign the drive.
Replace the pulleys and
belts.
X X X X
Short belt, high speed Check for alternave proles
and redesign the drive.
X X
Belts have been ght during
drive standsll
Loosen the belts, if the drive
is out of operaon for more
than 2 months.
X
Lubricant or fuel on the belts,
belts have been waxed
Clean the drive and repair
any leaks.
Replace the belts.
X X
Belts stored in sunshine Store the belts, according to
the instrucons.
X X