13. 12. 21. Document Number 691505 5
Colt International LLC | Dubai | United Arab Emirates | PO Box 36926 | www.coltinfo.ae
CYCLONE
Installation Manual
8.0 MAINTENANCE
It is important that maintenance checks are recorded and that the
schedule is always adhered to, in all cases, the previous report should
be referred to.
Induction motors, by their very nature require minimal maintenance.
However, a regular regime of inspection is recommended to ensure
minor problems do not escalate into breakdowns. Typical intervals
would be 1000 hours of operation or 3 months, whichever is the
sooner.
8.1 Routine Maintenance (Every 3 Months)
•Clean all areas of unit of dust and fibres, thoroughly inspect the
unit and its components for corrosion, acting immediately to
treat/restore any damaged areas.
•Check sealing of motor and gland plate.
•Check for visible damage (cracked impeller, fan cowl bent, etc.)
•Check for excessive vibration.
•Check insulation resistance is adequate, imperative this is checked
after prolonged shutdown.
•Tighten fasteners.
•All electrical connections within the unit should be tightened.
8.2 Motor / Impeller Removal
If the motor or impeller has to be removed for cleaning the following
procedures are recommended:
Inspection of the motor/impeller must be made by using the intake and
discharge openings.
•Motor connection cables to be unfastened within metal isolator
box (A).
•Taking care, feed the cable contact back into the unit casing.
•Before loosening bolts (B) of the motor impeller (C) care must be
taken to prevent the unit from falling down - e.g. by using a lifting
device or elevating platform.
•To remove motor/impeller - loosen bolts (B). Before loosening
bolts (B) of the motor impeller (C), care must be taken to
prevent the unit from falling down i.e. by using a lifting device
or elevating platform.
•Remove impeller from unit (C) by lowering it out of casing.
•Re-fitting the assembly is achieved by performing the above
process in reverse order.
B
C
A
10 Removing Motor / Impeller Assembly
7.0 SPECIFIC COMMISSIONING AND SERVICING
REQUIREMENTS
Motors for Smoke Extract Fans
Exposure temperature/time: 300°C for 2 hours / 400°C for 2 hours
These motors are used to provide a SAFETY FUNCTION for people
in the event of fire in public premises or in the home: they are
therefore subject to strict constraints concerning their operating and
maintenance.
Operating Constraints
i. Check on the nameplate that the selected motor corresponds to
the maximum exposure temperature and duration.
ii. Non ventilated motors MUST be placed in the airflow from the
driven fan. Ventilated motors can be placed outside the flow.
iii. AFTER THE MOTOR HAS BEEN SUBJECTED TO ONE EMERGENCY
DUTY OPERATION, IT MUST BE REPLACED.
iv. With variable speed control. Ensure that the maximum speed never
exceeds the speed of the motor supplied by the mains and that the
delivered power corresponds to the previous definitions.
These qualifications ensure the qualification of the driven fan by
the manufacturer.
Maintenance Constraints
Regular service visits must be performed on the installation AT
LEAST EVERY 6 MONTHS, incorporating the following checks:
i. Checking insulation resistance (R>100 MOhms, 500V DC)
• If the drain holes are blocked, open them to eliminate any
accumulated condensation.
• If R<100 MOhms, dry the stator in an oven and check the
insulation resistance. If the fault persists, replace the stator.
• The stator must be replaced 5 years after installation or after
20,000 hours of operation.
ii. Cooling check
• Ensure there is no dust or grease in the entire ventilation circuit
(housing fins, motor cover/fan if fitted driven fan).
• Ensure the motor runs normally when switched on for a few
minutes.
iii. Bearing check (C3 or C4 play)
Run the motor during each maintenance visit. When the motor is cold,
a high level of noise is caused by the texture of the grease. This does
not indicate a bearing fault.
iv. S2 duty only:
The bearings must be replaced by an identical type every 5 years.
Ensure the motor runs normally when switched on for a few
minutes.
v. Fixing Check
During regular maintenance, check all fixtures and fittings to ensure
they have remained secure and in good working order.
S1 duty and Emergency in S2 duty:
a) Permanently greased bearings.
300°C or 400°C range; replace on 2 pole motors after 10,000 hours of
operation and on motors with 4 poles or more after 20,000 hours.
b) Regreaseable bearings
The information on the motor nameplates must be strictly respected
(grease quantity, grease quality and regreasing frequency). The bearings
must be replaced after 20,000 hours of operation.
