Kruger TDA Instruction manual

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 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.
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 manufacturer’s
recommendations.
Check and tighten all hold-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 alignment, 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 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. (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) Belt drive alignment
(3) Belt drive tension
(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 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-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 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 unbalance
•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 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 Remedy
Impeller •Impeller unbalanced due to deposits (dirt or grease)
•Impeller unbalanced due to wear
•Clean impeller, rebalance the system
•Replace impeller
Drive •Unbalanced pulleys
•Belts may vibrate excessively
•Balance the pulley or the system
•Proper sheave alignment and adjust to correct
belt tension
Required air volume not achieved
Possible cause Remedy
Impeller
•Impeller/inlet dirty or clogged
•Improper running clearance
•Improper blade setting
•Impeller installed or running wrong direction
•Incorrect speed of impeller because of:
i) Wrong motor speed
ii) Belt drive ratio not correct
iii) Too high slip of V-belt
iv) Wrong calibration of inverter
•Clean the impeller or inlet
•Change to correct clearance
•Adjust to correct angle
•Change to correct rotation by changing poles of
electrical feed line to motor
i) Change motor or belt drive
ii) Change belt drive
iii) Increase tension of belts
iv) Adjust inverter calibration
Duct System •Shutters or dampers of the system are closed
•Object obstructs fan or duct
•Inlet guide vanes are partly close
•Dampers closed
•Registers closed
•Leaks in supply duct
•Obstructions near fan outlet or inlet
•Sharp elbows near fan outlet or inlet
•Improper designed turning vanes
•The pressure losses of the duct system – suction or
discharge side – are higher than calculated/expected
try to find out at what duty point the fan actually is
working! Pay special attention when using an axial fan
•Insulating duct liner loose
•Pressure resistance offered by the system higher than
the design value
•Fluid density higher than the design value
•Actual system is more restrictive (more resistance to
flow) than expected
•Obstructed fan outlet inlets
Elbows, cabinet walls or other obstructions restrict air
flow. Inlet obstructions cause more restrictive
systems but do not cause increased negative
pressure readings near the fan inlet(s)
Fan speed may be increased to counteract the effect
of restricted fan inlet(s). Caution! Do not increase
speed beyond the fan manufacturers
recommendations
•No straight duct at fan outlet
(Fans which are normally used in duct system are
tested with a length of straight duct at fan outlet. If
there is no straight duct at the fan outlet, decreased
performance may result.
If it is not practical to install a straight section of duct
at the fan outlet, the fan speed may be increased to
overcome this pressure loss. Caution! Do not increase
fan speed beyond the fan manufacturers
recommendations.)
•Projections, dampers or other obstruction in a part of
the system where air velocity is high
•Obstructions in high velocity air stream
•Open damper or IVC
•Clear obstructed ducts
•Open grill/diffuser damper
•Open Damper
•Open Register
•Seal the Leakage
•Clear obstruction
•Redesign and change elbow
•Redesign and change vanes
•Modify duct design or try to eliminate turbulences
by straighteners or increase fan speed to
overcome unexpected losses (attention to
available motor power and rpm limitation of fan)

Fan does not start or operate
Possible cause Remedy
Electrical
Supply
•Blown fuses
•Electricity turned off
•Wrong voltage
•Failure of one or two phases
•Low voltage, excessive line drop or inadequate wire
size
•Check fuses/circuit breakers
•Check for switched off or disconnected
•Check for correct power supply
•Check for correct power supply
•Check for correct wire size
Motor •Motor not correctly connected
•Load inertia too large for motor
•Motor protection unit or switch are stopping as
temperature are too high
•Motor too small and overload protector has broken
circuit
•Connect the motor according to the motor label
•Change motor
•Reduce temperatures, check and change
insulation class, increase motor rating
•Change motor
Drive System •Broken belts
•Loose pulleys
•Replace belt
•Tighten pulley
Excessive air flow
Possible cause Remedy
Duct System •Pressure resistance offered by the system lower than
the design value
Gas Density •Gas density higher than the design value
High power absorption
Possible cause Remedy
Impeller
•Blade angle not set properly
•Adjust blade angle
Motor •Faults in the motor windings
•Motor power supply voltage lower than the value
indicated on the identification plate
•Replace motor
•Check with motor supplier
Fan •Fan Air flow value lower than design value
System •Oversized ductwork
•Filter(s) left out
•Access door are open
•Face and by-pass dampers oriented so coil dampers
are open at same time by-pass dampers are open
•Redesign ductwork
•Add in filter(s)
•Close access door
Gas Density •Calculated horsepower requirements based on light
gas (eg. High temperature) but actual gas is heavy
(eg. Cold start up)
Fan selection •Fan not selected at efficient point of rating •Check selection

GUIDELINES FOR DUCTED AXIAL FLOW FAN INSTALLATION
INCORRECT CORRECT
flexible connections
The length of the vane extensions
is 3 times their spacing
Square inlet elbow with extended trailing edge vanes delivers less
turbulent airflow to fan inlet
flexible connections
Abrupt inlet transition causes turbulence
Motor upstream of impeller increases turbulence and noise
Upstream radius elbow creates imbalance at inlet
Assymmetrical transition creates imbalanced load on fan,
with excess turbulence and noise
Slack or offset flexible connections causes turbulent air flow
Motor downstream from impeller minimizes turbulence
and noise
Gradual (1:7) expansion of the inlet duct avoids impeller
turbulence
Symmetrical transition balances load on fan, which minimizes
turbulence and noise
Taut, in-line flexible connections provide optional vibration
isolation without creating turbulence

Installation Method
C0NCRETE SLAB.
SPRING ISOLATOR
FLEXIBLE CONNECTION.
FLANGE CONNECTION.
AIR DUCT.
AIR FLOW.
L = DIAMETER
AIR FLOW.
AIR DUCT.
FLEXIBLE CONNECTION.
FLANGE CONNECTION.
AIR DUCT.
C0NCRETE SLAB.
SPRING
ISOLATOR.
PAD.
RUBBER
ROD
HANGER
EXPANSION BOLT.
ISOLATOR.
SPRING
C0NCRETE SLAB.
RUBBER
PAD.
ROD
HANGER
EXPANSION BOLT.
ISOLATOR.
C0NCRETE SLAB.
SPRING
ROD
RUBBER
PAD.
HANGER
EXPANSION BOLT.
Fig. 1 - Floor Type
Fig. 2 - Ceiling Type

Installation Method
C0NCRETE SLAB.
SPRING ISOLATOR
AIR FLOW.
AIR DUCT.
FLANGE CONNECTION.
FLEXIBLE CONNECTION.
L = DIAMETER
AIR FLOW.
AIR DUCT. AIR DUCT.
FLEXIBLE CONNECTION.
FLANGE CONNECTION.
C0NCRETE SLAB. EXPANSION BOLT.
HANGER
ROD
SPRING
ISOLATOR
RUBBER
PAD
SPRING
ISOLATOR
C0NCRETE SLAB. EXPANSION BOLT.
SPRING
ISOLATOR
HANGER
ROD
RUBBER
PAD
Fig. 3 - Floor Type
RUBBER
PAD
HANGER
ROD
EXPANSION BOLT.
C0NCRETE SLAB.
Fig. 4 - Ceiling Type

VIBRATION ISOLATOR INSTALLATION
•Choose proper isolator
(Isolator can be selected from Kruger selection programme)
•Adjust deflection based on the selected isolator.
•Maintain the operating / free height at the same level through step 2.
(The entire assembly must be levelled)
•Check all the deflection and operating / free height is properly maintained.
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.
Operating / free height

KRUGER GROUP (VENTILATION)
SINGAPORE SINGAPORE
Kruger Ventilation Industries Pte Ltd Kruger Engineering Pte Ltd
No. 17 Tuas Avenue 10 No. 17 Tuas Avenue 10
Singapore 639141 Singapore 639141
Tel.[phone] - Fax [phone] Tel. [phone] - Fax [phone]
MALAYSIA THAILAND
Kruvent Industries (M) Sdn Bhd Kruger Ventilation (Thailand) Co. Ltd
Lot 8, Jalan Perusahaan 2 Batu Caves 1/19 Moo 2 Rama II Rd, Tasai Mueng
Industrial Area, 68100 Batu Caves Selangor Samuthsakorn 74000, Thailand
Tel. [phone] - Fax [phone] Tel. [phone] - Fax [phone]
BEIJING GUANGZHOU
Bejing Kruger M&E Equipment Co. Ltd Guangzhou Kruger M&E Ind. Ltd
No. 1A Fuyuan South Road, Beijing No 1270 Maogang Road, Huangpu
Economical and Technological Development Guangzhou, P.R. China 510700
Area, Beijing China 100176 Tel. [phone] - Fax [phone]
Tel. [phone] - Fax [phone]
HONG KONG SHANGHAI
Kruger Ventilation (Hong Kong) Limited Shanghai Kruger M&E Industries Ltd
Flat B, 9/F, Yeung Yiu Chung (No. 8) Industrial No.500 Yuanguo Road, Anting, Jiading, Shanghai
Building, 20 Wang Hoi Road, Kowloon, Hong Kong 201814 P.R. China
Tel. [phone] – Fax [phone] Tel. [phone] - Fax [phone]
WUHAN TAIPEI
Wuhan Kruger M&E Industries Ltd Kruger Ventilation (Twn) Co. Ltd
108 Fangjicun, Yangyuan Street No. 157, Ping-an Rd, Hengfeng Village,
Wuhan, P.R China 430063 Dayuan Shiang Taoyuan County 337, Taiwan (ROC)
Tel. [phone] - Fax [phone] Tel. [phone] - Fax [phone]
PHILIPPINES AUSTRALIA
Kruger Ventilation Industries Phils. Inc Kruger Ventilation (Australia) Pty Ltd
FAPI Compound, E. Rodriguez Ave. 4 Blackfriar Place, Wetherill Park
Tunasan, Muntinlupa City, Philippines 1773 NSW 2164, Australia
Tel. [phone] - Fax [phone] Tel. [phone] – Fax [phone]
INDONESIA INDIA
P.T KrugerIndo Adhiteknik Kruger M&E Ind. (India) Pvt Ltd
Ruko Mahkota Mas Blok C No. 20 Pardhy House 1st Floor
Jl. M.H. Thamrin – Cikokol Tangerang 15117 Junction of Hanuman Road & MG Road
Tel. [phone] – Fax [phone] Vile Parle (East) Mumbai 57
Tel. [phone] – Fax [phone]
KOREA
Neomate Technology&Consulting Co. Ltd
No. A-407-1, Ansung B/D, 410-13
Shindorimdong, Kuro-Gu, Seoul, Korea
Tel. [phone] - Fax [phone]