Accurex XRUBS-200 Руководство по установке, эксплуатации и техническому обслуживанию - Страница 8
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Печатать страницуMaintenance
DANGER
Disconnect and secure to the "off" position all
electrical power to the fan prior to inspection or
servicing. Failure to comply with this safety precaution
could result in serious injury or death.
DANGER
Pour écarter les risques de blessure grave ou de mort,
débrancher et verrouiller l'alimentation électrique en
position « Arrêt » avant tout contrôle ou entretien.
WARNING
This unit should be made non-functional when
cleaning the wheel or housing (fuses removed,
disconnect locked off).
AVERTISSEMENT
L'appareil doit être rendu non opérationnel lors du
nettoyage de la turbine ou du caisson (fusibles retirés,
sectionneur verrouillé).
IMPORTANT
Uneven cleaning of the wheel will produce an out of
balance condition that will cause vibration in the fan.
Installation and maintenance are to be performed only
by qualified personnel who are familiar with local codes
and regulations and who are experienced with this type
of equipment.
Motor maintenance is generally limited to cleaning
and lubrication (where applicable). Cleaning should be
limited to exterior surfaces only. Removing dust buildup
on motor housing ensures proper motor cooling.
Greasing of motors is only intended when fittings are
provided. Many fractional horsepower motors are
permanently lubricated and should not be lubricated
after installation. Motors supplied with grease fittings
should be greased in accordance with manufacturer's
recommendations. Where motor temperatures do not
exceed 104ºF (40ºC), the grease should be replaced
after 2,000 hours of running time as a general rule.
Wheels require much attention when moving air
in grease applications. Grease, oil and dust may
accumulate causing imbalance. When this occurs, the
wheel and housing should be cleaned to ensure smooth
and safe operation.
All fasteners should be checked for tightness each time
maintenance checks are performed prior to restarting
unit.
When installing fans for restaurant exhaust applications
follow NFPA 96 for cleaning fans.
Grease containers must be emptied at regular intervals
to prevent overflow.
A proper maintenance program will help these units
deliver years of dependable service.
8
Steel Grease Fan
Belt and Bearing Maintenance
1. Belts tend to stretch after a period of time. They
should be checked periodically for wear and
tightness. When replacing belts, use the same type
as supplied with the unit.
2. Matched belts should always be used on units with
multi-groove pulleys.
3. For belt replacement, loosen the tensioning device
enough to allow removal of the belt by hand. Do not
force belts on or off.
4. Once installed, adjust belts as shown in
"Pre-Starting Checks."
5. To ensure tightness, check pulley setscrews. Proper
keys must be in keyways.
6. Fan RPM should not be readjusted. Only use
pulleys of identical size and type when replacing
pulleys.
7. On steel grease fans, the standard cast pillow block
bearings are factory lubricated and are provided
with external grease fittings. Annual lubrication
is recommended, or more frequently if needed.
See Table 2 on page 9. Do not over-grease. Use
only one or two shots of lubricant with a hand
gun. Maximum hand gun rating is 40 psi. Rotate
bearings during lubrication where good safety
practice permits. Caution should be employed to
prevent over packing or contamination.
8. Units installed in hot, humid or dirty locations
should be equipped with special bearings. These
bearings will require frequent lubrication. Caution
should be employed to prevent over packing or
contamination.
9. Grease fittings should be wiped clean. The unit
should be in operation while lubricating bearings.
Extreme care should be used around moving parts.
10. Grease should be pumped in very slowly until a
slight bead forms around the seal. A high grade
lithium base grease should be used. See Table 3 on
page 9.
11. During the first few months of operation, check
bearing setscrews periodically to ensure tightness.
12. If unit is to be left idle for an extended period,
remove belts and store in a cool, dry place to avoid
premature belt failure.