FPZ SCL R20-MD MOR IE2 Instructions page 42

A) With the unit in operation periodically check the following parameters:
•
Delivery temperature
•
Operating pressure and/or vacuum
•
Electric motor current absorption
•
Vibration
Measurement of vibration
The measurements for determining the vibration velocity must be made with an electronic vibration meter at the places indicated below
(at 90° to each other with respect to the axis of rotation).
Points P1 and P2 (front bearing): place the vibration meter near the front bearing, adopting the highest value.
Points P3 and P4 (rear bearing): place the vibration meter near the rear bearing, adopting the highest value.
Legend:
Classification of machines:
Class I = Blowers with electric motor of power ≤ 15kW
Appraisal zones:
Zone A = Blowers with vibration (a) inside this zone they are considered
acceptable for long-term duty.
Zone B = Blowers with vibration (a) inside this zone they are considered
unsuitable for long-term continuous duty. The machine can be operated in these
conditions for a limited period, as long as there is the opportunity for a suitable
corrective action.
Danger due to seizing of the impeller caused by excessive vibration.
Vibration values higher than Zone B (table of effective vibration velocity value) are considered NOT permissible and can cause damage
to the machine and therefore serious injury to operators.
- In case of noise and/or abnormal vibration indicating the possibility of seizing of the impeller, move away and turn the unit
off immediately!
Variations in normal working conditions (increases in power absorption, abnormal noise, vibration, excessive overheating of the service
fluid) are signs of a unit malfunction.
Compare the measured values with those given in the "SPECIFICATIONS".
B) With the unit stopped and cooled, periodically carry out the following checks:
•
Dust: check and remove deposits from the external surfaces of the unit.
•
Suction filter (if fitted): every 10-15 days, check and clean or replace the filter cartridge. The dirty cartridge creates strong
suction resistance and consequently a higher pressure differential, power absorption and operating temperature.
•
Check the flexible coupling as follows:
- Remove the screws and coupling cover (A).
- Manually rotate the coupling to expose the reference lines marked on the elastomer.
- Check the coupling and appraise its state after 100 hours or up to 1 month of operation; if no deformations are detected,
the check can be repeated every 2000 hours or every 3 months.
- The deformations are detected by the lines marked on the elastomer (B).
FPZ-MI-R-MD-MOR-GOR-IE2-15-R03
GOR
Effective vibration
velocity value [mm/s]
42 / 119
MOR
Class I
(≤ 15kW)
a<2.2
2.2<a<4.5
A
B