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1、 General Instructions (Axial Flow Fan) TDA-TDF-TBE-TDB-TDS IGB010.E2/0703 This manual is to guide the users in the proper storage, installation, operation and maintenance procedures to ensure maximum equipment life and trouble-free operation. HANDLING AND MAINTENANCE SHOULD ALWAYS BE PERFORMED BY EX
2、PERIENCED AND TRAINED PERSONNEL. RECEIVING, HANDLING AND STORAGE Rough handling during shipment and improper storage can cause damage that is not noticeable until the fan is in operation. This can be avoided with proper storage and handling techniques. Fan should be hoisted with slings placed around
3、 the fan housing. Touch up the scratch coated surfaces during lifting, to prevent corrosion to occur at this area. Store the fan in a clean and dry place, preferably indoor to ensure fan shaft, bearing and fan casing are protected against dust and corrosion. Do not store the fan in a location where
4、it will be subjected to vibration. This can cause the internal surface to rub against each other and damage the bearings. START-UP CHECK LIST Before putting any fan into initial operation the manufacturers instruction must be followed. Complete the following checklist to make sure that the fan is re
5、ady to run. Lock out the primary and all secondary power sources. Make sure the foundation or mounting arrangement and the duct connections are adequately designed in accordance with recognized acceptable engineering practices and with the fan manufacturers recommendations. Check and tighten all hol
6、d-down (securing) bolts. Check the fan assembly and bearings for proper grounding to prevent static electricity discharge. Spin impeller to see whether it rotates freely and is not grossly out of balance. Inspect impeller for correct rotation for the fan design. Check belt drive or coupling alignmen
7、t, use recommended belt tension. Check belt drive for proper sheave selection and make sure they are not reversed. Properly secure all safety guards. Inlet and outlet damper (if any) must be maintain 60% air volume, totally closed should be avoided. Switch on the electrical supply and allow the fan
8、to reach full speed. Check carefully for :- (1) Excessive vibration (2) Unusual noise (3) Proper amperage and voltage values (4) Proper belt alignment If any problem is indicated, SWITCH OFF IMMEDIATELY. Lock out the electrical supply, secure the fan impeller if there is a potential for wind milling
9、. (impeller turning due to a draft through the system). Check carefully for the cause of the trouble and correct as necessary. The fan may now be put into operation but during the first 8 hrs of running, it should be periodically observed and checked for excessive vibration and noise. Checks should
10、be make of motor input current and motor & bearing temperature to ensure that they do not exceed manufacturers recommendation. After 8 hrs of operation, the fan should be shut down to check the following items :- (1) All set screws and hold-down bolts (2) Belt drive alignment (3) Belt drive tension
11、(4) Bearing housing temperature After 24 hrs of the satisfactory operation, the fan should be shut down, and the drive belt tension should be readjusted to recommended tension. TROUBLE-SHOOTING Fan is developing or emitting abnormal or excessive noise Possible cause Remedy Drive system Fan or motor
12、sheave not properly tightened onto shaft Misalign sheaves Belt hitting Belt Guard Belts are not tensioned enough and are too loose Belts too tight Belts wrong cross section Belts worn Belts oily or dirty Belt guard is not properly fastened Motor, motor base or fan not securely anchored or Secured Re
13、-tightened the sheaves Re-align the sheaves Check fan & motor sheave alignment & belt tension Increase the belt tension Correct belt tension Change to right type Replace belts Clean belts Tighten the fasteners Tighten the fasteners Motor Lean-in cable not secure Noisy motor bearings Single phasing a
14、 3 phase motor Low voltage Cooling fan striking shroud Electromagnetic fault in motor AC hum in motor or relay Starting relay chatter Fasten the cable properly Replace bearing Check power supply Check power supply Check motor assembly Replace motor Fan Components Impeller loose on shaft Impeller unb
15、alance Impeller not center in inlet or housing Blades rotating close to structural member Bearing defective or worn out Bearing loose on bearing support or shaft Foreign material inside bearing Fretting corrosion between inner race and shaft Bearing not sitting on flat surface Rubbing noise between
16、bearing seal and inner ring Blades coinciding with an equal number of structural members Tighten impeller Balance impeller Adjust impeller to center of inlet or housing Correct the running clearance Replace bearing Re-tighten bearing Clean bearing Replace bearing or shaft Re-adjust bearing Replace bearing Fan is vibrating excessively Possible cause R
