General Instructions
(Propeller Fan)
APK - APL - APN Series
IGB015.2/0107
This manual is to assist the engineer to avoid the most common fan problems caused by improper storage,
installation, operation and maintenance. HANDLING AND MAINTENANCE SHOULD ALWAYS BE
PERFORMED BY EXPERIENCED 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 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 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 manufacturer’s instruction must be followed. Complete the
following checklist to make sure that the fan is ready to run.
Lock out the primary and all secondary power sources.
Ensure that all fastener, particularly impeller fastener, are tight prior to
start-up. Do not re-use locking fasteners.
Regularly check impeller fastener for tightness.
Spin impeller to see whether it rotates freely and is not grossly out of balance.
Inspect impeller for correct rotation for the fan design.
Properly secure all safety guards.
Switch on the electrical supply and allow the fan to reach full speed.
Check carefully for :- (1) Excessive vibration
(2) Unusual noise
(3) Proper amperage and voltage values
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. (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 be make of motor input current and
motor & bearing temperature to ensure that they do not exceed manufacturer’s 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) Bearing housing temperature
INSTALLATION
Inlet and outlet ductwork should be free from obstructions.
Avoid sharp bends on inlet or outlets.
Do not use ductwork smaller in area than the fan.
Flexible duct connections should be taut
Ductwork connections should be well aligned.
Inlet cones must be fitted to free inlet applications.
Ensure that the fan orientation is correct for the required air flow direction.
IMPORTANT: External rotor motors only
All singled-speed three-phase fans must be wired in star only. If wired in delta they will burn out and motor
warranty is avoid. Refer to wiring diagram for details.
ROUTINE MAINTENANCE
Maintenance should always be performed by experienced and trained personnel. Do not attempt any
maintenance on a fan unless the electrical supply has been locked out or tagged out and the impeller has
been secured.
Under normal circumstances, handling clean air, the system should require cleaning only about a year.
However, the fan and system should be checked at regular intervals to detect any unusual accumulation.
The fan impeller should be specially checked for build-up of material or dirt which may cause an Imbalance
with resulting undue wear on bearings and belt drives. A regular maintenance program should be established
as needed to prevent material build-up.
Periodic inspection of the rotating assembly must be made to detect any indication of weakening of the rotor
because of corrosion, erosion, or metal fatigue.
