MPB-R/U/2016
16/33 tel. (22) 751 95 50
www.venture.pl
fax. (22) 751 22 59
5. MAINTENANCE, REVIEW
5.1 Maintenance guidelines
During maintenance and review follow the guidelines contained in point 1.2
Fan need to be subject of regular review and maintenance (point 5.2).
Maintenance and review of motor need to be overtaken in accordance with motor documentation and markings.
Exchange
of motor bearings need to be made before the end of current bearing lifetime.
To clean fan construction use slightly damp delicate material. It is prohibited to use detergents, liquids under pressure and tools that may
scratch the unit surface.
The fan need to be turned on at least once a month (minimum couple of impeller turns).
Ensure that there are no foreign bodies (e.g. assembly components, tools) near and inside the fan, the impeller is not blocked, the unit is
clean, dry and secured after maintenance and review. After cleaning finishes, turn on the fan at max speed for 30 minutes.
During review special attention to the following need to be paid:
dust and dirt
Prevent the accumulation of dust/dirt on and inside the fan. Dirt accumulated on: grids – may reduce the fan parameters;
housing and motor – can reduce the cooling; hot surfaces –may ignite. Special attention must be paid to motor cooling
impeller and its cover. Reduction of cooling ability may lead to overheat of motor without working of safety devices.
corrosion
Corrosion of the fan may lead to mechanical damage of it. It is forbidden to use the fan if corrosion appears
overload
Exceeding of nominal current may be caused by improper choice of fan, mechanical damage (e.g. impeller, bearing),
improper electrical connection. Current value must be controlled, and if its growth is noticed, the reason need to be
determined and device need to be repaired. Current value cannot exceed nominal value.
vibration
Excessive vibration may cause mechanical damage of the fan or it mounting construction. The vibration increase can
indicate bearings damge or loss of impeller balance. Vibration value need to be controlled, and if its growth is noticed, the
reason need to be determined and device must be repaired.
Maximum vibration value on bearings (perpendicular to motor shaft) after fan installation cannot exceed value presented
in table below:
rigidly mounted*
flexibly monted*
peak
r.m.s
peak
r.m.s.
6.4 mm/s
4.5 mm/s
8.8 mm/s
6.3 mm/s
*according to ISO 14694
Access to the motor can be achgieved by removing the motor cover. After assembling make sure that mounting screws are properly tightened
(according to the table).
Fig. 2
Screw size (A)
Torque (Nm)
M6
10
.
A – motor cover mounting screw
B – motor cover
