FPZ SCL K03 MS-MOR, Инструкция по эксплуатации

Страница: 23 / 79

FPZ-MI-K TS-MOR-USA-15-R03 23 / 79
7 MAINTENANCE
In order to prevent faults and damage it is important to periodically check the units in operation, therefore it is advisable to adopt a
maintenance plan in line with this Manual, providing for:
•
Periodical checks
•
Periodical maintenance and troubleshooting
PERIODICAL CHECKS 7.1
The units in operation should undergo periodical inspections by qualified personnel, in order to prevent failures that can directly or
indirectly cause damage.
A) With the unit in operation periodically check the following parameters:
•
Delivery temperature
•
Operating pressure and/or vacuum
•
Electric motor current absorption
•
Vibration
•
State of the filter and corresponding pressure loss
Measurement of vibrations
The measurements for determining the vibration velocity [mm/s]
must be done with an electronic vibration meter, at the following
places:
•
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 on the electric motor casing near the bearing
housing (not on the fan cover), adopting the highest
value.
Legend:
Classification of machines:
Class I
= SCL with electric motor of power ≤ 15kW
Class II = SCL with electric motor of power > 15kW
Appraisal zones:
Zone A = SCL with vibration (a) inside this zone
they are considered acceptable for a long-term
duty.
Zone B = SCL vibration (a) inside this zone they
are considered unsuitable for a continuous long-
term 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.
Effective
vibration
velocity value
[mm/s]
Class I
(≤ 15kW)
Effective
vibration
velocity value
[mm/s]
Class II
(>15kW)
a<1.8 A a<2.8 A
1.8<a<4.5 B 2.8<a<7.1 B
Variations in normal working conditions (increases in power absorption, abnormal noise, vibration, excessive overheating of the service
fluid) are indications of a unit malfunction.
Also, 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.
Danger of burns caused by contact with hot surfaces of the unit!!
When in operation the blowers / exhausters can reach high surface temperatures.
Before carrying out any operation after shutdown wait at least 20 minutes for the unit to cool.
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!
P4
P3
P1
P2