9
4. COMMISSIONING
4.1. PRIOR
• If the fan is accessible to operators and there is a health and safety risk, adequate protection must be fi tted; informa-
tion for safety equipment, including guards, can be found in S&P accessories catalogue.
• Ensure the isolator is in OFF position.
• Check fan equipment name plate data is appropriate to the location electrical supply, especially Voltage, Frequency,
Phase, Amps, speed are correct. All safety and protection devices have been fi tted and are functional.
• Check earth connections, electrical terminations and terminal box lid, with any seals, if fi tted, are correct.
• Check all rotating parts have free, unobstructed movement.
• Check there are no foreign bodies inside the fan or that can be drawn into, or fall into fan.
• Check the structure is complete and has no damage.
• Check installation and area is safe.
• Check all aspects regarding fi re safety are compliant with local applicable regulations, that all procedures have been
followed and all necessary inspections have been carried out.
4.2. START UP
• Activate HATCH cover mechanism and have it complete a full open/close cycle. Check that it takes circa 3min. Return
the HATCH to “open” position.
• Start the fan motor briefl y and switch it off. Check that the impeller and airfl ow direction is correct. In case it is not,
swap two phases of the electrical connection.
• Once the rotation is correct, start the fan again and check current does not exceed fan equipment nameplate data.
Check also for any abnormal noises and/or vibrations
• After two hours of operation, check that all fi xings and supports/bases are tight and adjust if necessary.
• Set up the activation sequence of the THGT-HATCH unit so that the fan starts 30 seconds after the cover starts to open.
• Return the HATCH cover to its “closed” position.
5. MAINTENANCE
Maintenance/repairs must be carried out by competent personnel and in accordance with applicable International,
National and Local regulations. The unit should be electrically isolated before any work is started.
Fan equipment should be regularly cleaned, frequency depending upon service load and application, but no less than
every 6 months. Units installed in dusty environments may require more frequent cleaning to ensure safe operation.
Cleaning should include all areas where dust can accumulate in the fan equipment.
Special attention should be made to any unusual sounds, vibration or temperature. If any problems are detected the unit
should be stopped immediately and cause inspected. The impeller and blades should be regularly checked.
Typical checks would be:
•
Typical one (1) month check:
− Correct HATCH cover open/close motions.
− Motor bearings are suffi ciently lubricated, all fi xings tight, especially impeller locking bolts, support fi xings and
motor assembly.
− Safety guards are correctly affi xed.
− All rotating parts have free unobstructed movement.
− No debris or foreign bodies inside fan or can be drawn into fan.
− Fan equipment is clean inside and outside casing.
− Dedicated Emergency Ventilation Fans should be run minimum for 15 minutes.
•
Typical three (3) month check:
− Electrical earth connection tight and safe.
− All fi xings are secure.
− Analyse fan / motor vibration and compare with past readings, and typical action levels in Annex 4: Table of vibration
levels.
− Re-lubrication, if required, in accordance with instructions.
− Emergency Ventilation fan systems should be run and checked.
•
Typical twelve (12) month check:
− Emergency Ventilation fan systems should be run and operation certifi ed
Re-lubrication of motor bearings,
where applicable, should be carried out in accordance with specifi c motor Instruc-
tions.
Warning; do not mix different types of grease
.
Vibration sensing
, or regular analysis of vibration levels, provides an early indication of potential wear, unbalance, or
early warning of breakdown. Readings should be taken at bearing, 90° to shaft center line, on a clean fl at secure surface.
If access to motor is not possible (motor in airstream) then a suitable external location may be identifi ed for comparison.
