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Summary of Contents for Kruger TDA Series
- Page 1 Axial fans Installation and Operating instructions IGB010.E8 – December 2020 1 of 71...
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Page 2: Table Of Contents
Contents INTRODUCTION Purpose of this manual Safety symbols used in this manual Safety symbols used on fans GENERAL INFORMATION Definitions, basic principles, terminology used and correlated documents Construction details of axial fans 2.2.1 Versions and motor positions 2.2.2 Flow indications Fan name plate Fan Temperature types Description of fan... - Page 3 4.3.1 Lifting version 1 and 9 axial fans 4.3.2 Lifting version 4 axial fans 4.3.3 Lifting fans packed in crate Storage INSTALLATION General information 5.1.1 Minimum installation distances Assembly of axial fans 5.2.1 Version 4 axial fans 5.2.2 Version 1 axial fans 5.2.3 Version 9 axial fans Mounting Configuration...
- Page 4 FINAL DISMANTLING AND DISPOSAL OF FANS 10.1 Version 4 axial fans 10.2 Version 1 and 9 axial fans TECHNICAL APPENDICES 11.1 Tightening torques for nuts and bolts 11.2 Checklist before starting fans 11.3 Programmed maintenance intervals INDEX IGB010.E8 – December 2020 ...
- Page 5 Index of Diagrams Fig. 2-1 Axial fan versions Fig. 2-2 Flow indications Fig. 2-3 Name plate of fan described by this manual Fig. 2-4 Key to reading fan name plate Fig. 2-5 TDA fan components indicated Fig. 2-6 TDA-V fan components indicated Fig.
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Page 6: Introduction
No part of this manual may be copied, reproduced or transmitted in any form whatsoever and by any electronic, mechanical or photographic means without the express authorization of KRUGER. The KRUGER Technical Office is fully at your disposal for all information required. Safety symbols used in this manual Certain items of particular interest in this manual may be preceded by one of the following symbols: DANGER: Indicates situations that might cause personal injuries. -
Page 7: Safety Symbols Used On Fans
It is permitted to open inspection hatches only when all moving parts have reached a complete standstill. Indication of a lifting point. This symbol is applied near the points identified by KRUGER for lifting and moving the fan. Hot surfaces >60 °C. -
Page 8: General Information
The following documents are correlated to this manual: Kruger fan selection sheet for the fan, which lists dimensions, weights, rotation speeds, fluid types and data on flexible couplings and vibration dampeners. -
Page 9: Construction Details Of Axial Fans
Construction details of axial fans 2.2.1 Versions and motor position VERSION 1 VERSION 4 VERSION 8 VERSION 9 VERSION 12 Standard position with motor at 0° Fig. 2-1 Axial fan versions 2.2.2 Flow indications The diagram refers to version 4, but is valid for all construction versions: A = Flow from motor to impeller... -
Page 10: Fan Name Plate
Fan name plate The name plate is the only means of fan identification recognized by the manufacturer. It must not be modified, and must not be removed or damaged. Fig. 2-3 shows the plate fitted to the fan. Fig. 2-3 Name plate of fan described by this manual Fan model / Fan series / Blade type / Hub diameter / Blade number / Tip angle Fan tag Fan item code... -
Page 11: Fan Temperature Types
MXC* 315-2000 Please consult KRUGER for fan series other than specified. * MXC series is designed for kitchen exhaust application and comply with UL 762 Table 2-1 Types of fans Description of fan 2.5.1 TDA series Taking the fan shown in Fig. - Page 12 2.5.2 TDA-V series Taking the fan shown in Fig. 2-6, TDA-V fan is generally constituted by the following components: Protection Net (1); Terminal Box (7); ● Impeller (2); Terminal Support (8); ● Motor (3); Outlet Vane (9); ●...
- Page 13 2.5.3 TDB-II series Taking the fan shown in Fig. 2-7, TDB-II fan is generally constituted by the following components: Protection Net (1); Motor cover Plate (Front) (9); ● Motor cover Plate (Rear) (2); Hub (10); ● Motor cover Rong 1 (3); Impeller (11);...
- Page 14 2.5.4 MXA series Taking the fan shown in Fig. 2-8, MXA fan is generally constituted by the following components: Pod Cover (1); Motor cover (8); ● Impeller (2); Outlet Vane (9); ● Hub (3); Motor Base (10); ●...
- Page 15 2.5.5 TBE series Taking the fan shown in Fig. 2-9, TBE fan is generally constituted by the following components: Protection Net (1); Shaft (11); ● Upper Belt Back Cover (2); Hub (12); ● Upper Belt Casing (3); Impeller (13); ...
- Page 16 2.5.6 MXC series Taking the fan shown in Fig. 2-10, MXC fan is generally constituted by the following components: Protection Net (1); Motor Base (8); ● Inlet Cone (2); Motor (9); ● Wheel (3); Bearing Base (10); ●...
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Page 17: Envisaged Use And Foreseeable Uses According To Experience, And Prohibited Uses
Envisaged use and foreseeable uses according to experience, and prohibited uses The envisaged use for the fan with the name plate as shown in Fig. 2-3 is as follows: A commercial axial fan is a machine that serves to move a gaseous fluid inside a fluid movement system to which the fan is connected by means of ducts and technical chambers provided for this purpose. -
Page 18: Life Cycle Of Fan
In case of use in conditions of particularly difficult operation (medium, high), this limit must be reduced. Any such reduction must be assessed in collaboration with the KRUGER Technical Office. In the specific case of operation at variable speeds, the impeller life cycle must be assessed on a case-by-case basis, and must also be agreed with the KRUGER Technical Office. -
Page 19: Warnings And Main Safety Indications
Type D: Ducted Inlet, Ducted Outlet. Generally, KRUGER does not and cannot know which of the above installation types will be chosen and applied by the user, and unless otherwise specified by contract, the fan is supplied for installation types B, C or D according to the fan series and flow. -
Page 20: Installation Type A: Instructions For Assembly, Installation And Connections
CAUTION: It is advisable to adopt precautions that prevent access to the room containing the fan while it is operating, or to keep persons away with fixed protection net that maintain a safe distance from the inlet opening. WARNING: Check the efficiency of all protection net every month. In case of wear, damage or breakage, replace them immediately. -
Page 21: Installation Type C: Instructions For Assembly, Installation And Connections
For special applications, such as for example the movement of fluids at a high temperature or that are particularly corrosive, or to guarantee perfect sealing of the joint, special joints must be used. In this case the user and/or system designer must contact the KRUGER Technical Office. IGB010.E8 – December 2020... -
Page 22: Risks Involved In Foreseeable Incorrect Handling And/Or Abnormal Uses Based On Experience
Risks involved in foreseeable incorrect handling and/or abnormal uses based on experience When moving, lifting and installing the fan, always follow the instructions provided in this manual. It is absolutely prohibited to use the fan in conditions other than those indicated by the data on the name plate.... -
Page 23: Other Risks Related To Fans Pursuant To Uni En Iso 12499
The fluid moved by the fan must be adequately checked for the possible presence of toxic and/or Other risks inflammable substances, even if their presence is not envisaged in the use of the fan. related to fans pursuant to UNI EN ISO 12499 The specific risks defined below are those deriving from mechanical aspects of the fan. -
Page 24: Specific Risks With Fans During Maintenance
In this case as well, there may be the risk of trapping or cutting injuries against fixed parts of the casing. 3.7.3 Environmental risks KRUGER fans are designed to operate in and to withstand ordinary conditions of working environments. The presence of: Vibrations Corrosive agents (dust, gas, fumes, mist)... -
Page 25: Operating Speed Risks
Cause slackening of tightening and fixing components (nuts and bolts) Generate greater noise. KRUGER strongly recommends the use of a control and monitoring system for the fan, with continuous monitoring of vibrations and bearing temperatures. Depending on the specific application and use of the fan, it is advisable to define an "alarm threshold" for fan vibration levels and bearing operating temperatures. - Page 26 CAUTION: If no inverter is used for gradual starting of the fan, it is absolutely prohibited to use toothed pulleys, as these can cause irreversible damage to fan structures. Consult the KRUGER Technical Office. CAUTION: Conditions of overspeed can be caused by drive system faults on fans with direct transmissions.
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Page 27: Noise Emission Risks
Avoid positioning fans in areas that could increase the noise risk. The definition of the risks to workers of exposure to noise is not the responsibility of KRUGER, which limits itself to indications of values, levels of uncertainty, standards or criteria used for noise emission measurements. -
Page 28: General Information On Noise Emission Data
As envisaged by applicable legislation, it is the user that must assess the level of exposure of operatives to noise emissions using its own specific procedures, identifying: Sources of noise and their relative importance Average exposure times for each operative The level of direct and reflected noise ... - Page 29 The possible contribution to the overall noise level of the noise caused by the motor, the transmission system and any accessories that may be present is not considered. In addition, the value of background noise of the installation environment is not considered to be significant. The point at which maximum Sound pressure is found normally corresponds to the outlet duct (external to the ducting), and its value is 3–4% higher than the average value.
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Page 30: Transport, Movement And Storage
TRANSPORT, MOVEMENT AND STORAGE Lifting and movement operations with the fan may create hazardous situations for exposed persons. It is therefore advisable to follow the instructions provided by KRUGER and to use suitable equipment. Lifting and movement It is advisable to carry out all lifting and movement operations on the fan and its components with extreme care, avoiding impacts that may affect its correct operation or damage covered parts. -
Page 31: Lifting Version 4 Axial Fans
Every time that a sling is used, it must be inspected beforehand for possible damage or evident signs of wear. To connect the sling to the load, it is preferable to use the method with straight arms. In this case, the lower ends are connected directly to the attachment point. -
Page 32: Lifting Fans Packed In Crate
The lifting points for lifting the crate with a forklift truck are identified by two black triangles with the tip pointing downwards. KRUGER ensures the stability of the fan or of fan components inside the case by means of rigid connections linked directly to the packing, so as to prevent any possible sudden movements of crate contents. -
Page 33: Storage
The load must be lifted away from the support surface with a very slow initial movement, so as to be able to identify any potential oscillations of the load. If residual oscillations of a nature that could be a hazard for persons or things during transport of the load are present after lifting it away from the support surface, it is advisable to wait for these oscillations to stop before starting transport operations. -
Page 34: Installation
All assembly operations must be carried out only by qualified personnel. Generally, special or specific equipment is not necessary for the assembly of fan parts. In the case of assembly of parts requiring a specific procedure, KRUGER will provide the additional information necessary for carrying out the operations correctly. -
Page 35: Minimum Installation Distances
CAUTION: All installation operations must be carried out solely by qualified personnel, authorized and using suitable equipment. CAUTION: During installation, the conservation of the minimum access spaces requested for maintenance operations must be verified. CAUTION: The use of flow regulation devices connected directly to the fan inlet may generate unstable operation. -
Page 36: Assembly Of Axial Fans
Assembly of axial fans The main steps of the assembly of axial fans in the various versions supplied are illustrated below. 5.2.1 Version 4 axial fans Fig. 5-3 Assembly of version 4 axial fans Step Operation Description Positioning of motor [1] The motor must be positioned on its base without fully tightening its fixing fasteners. -
Page 37: Version 1 Axial Fans
5.2.2 Version 1 axial fans Fig. 5-4 Assembly of version 1 axial fans Step Operation Description Positioning of support [1] The bearing support must be positioned on its base without fully tightening its fixing fasteners. Fitting of impeller [2] on support IMPORTANT: If necessary, reduce the diameter of the motor shaft until its nominal... -
Page 38: Version 9 Axial Fans
5.2.3 Version 9 axial fans Fig. 5-5 Assembly of version 9 axial fans After completing steps 1-2-3 indicated in paragraph 5.2.2, proceed with the installation of the transmission. Step Operation Description Installation of motor [1] Position the motor on its base [2] complete with stays. Fitting of pulleys with tapered Pulleys must be fitted so as to ensure their correct alignment and bush and fitting and... -
Page 39: Mounting Configuration
Mounting Configuration Horizontal mounting configurations are provided with a standard support for both ceiling and floor applications. The mounting configurations and the motor position can be changed in the field. Lifting lugs are provided to assist in the installation. Version 4 Version 9 IGB010.E8 –... -
Page 40: Installing And Adjusting Drive Belts And Final Checks
Installing and adjusting drive belts and final checks If the fan is fitted with a V-belt drive, the transmission is assembled as follows: Carefully clean tapered parts and the bush hole before fitting it onto the pulley. Fit the bush onto the pulley, taking care to align the threaded half-holes on the pulley with the ... -
Page 41: Vibration Isolator Installation
Fig. 5-6 Vibration Isolator setup Blade adjustment If the working point of the fan has to be changed and it is necessary to adjust the blade angle, please contact KRUGER Technical Office. IGB010.E8 – December 2020 41 of 71... -
Page 42: Electrical Connections
Electrical connections CAUTION: The fan is supplied in conformity with Directive 2014/30/EC on electromagnetic compatibility. In particular, the electric motor, if supplied with the fan, is guaranteed by its manufacturer to be conformant to this directive. It is the responsibility of the installer to check that the system in which the fan is inserted is conformant to the directive. - Page 43 (grommets). In this case, consult the KRUGER Technical Office. These precautions are applicable in particular if an external terminal box is fitted. Fig. 5-8 Example of positioning of external terminal box IGB010.E8 –...
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Page 44: Connection To Ducts
Connection to ducts The fan must be connected to ducting with all parts correctly aligned, without obstructions to air flow from gaskets or flexible components. The weight of ducting must not be supported by the fan, and deformations of parts of the machine by ducting connections must be avoided. Any flexible joints between the fan and inlet and/or outlet ducts must be installed in a way that prevents stress on flexible components, and that avoids contacts between metallic parts of the joints (see fig. -
Page 45: Checks To Be Made Before And After Starting
If necessary invert the rotation direction (see Electrical connections). KRUGER recommends the use of the checklist given in paragraph 11.2 to record the necessary checks for safety conditions. -
Page 46: Checks To Be Made With Fan Fully Operating
(with an ambient temperature of 20°C, the temperature of supports must be no higher than 70°C). It must be taken into consideration that in the first hours of operation, a higher temperature than that indicated may be normal, if it then falls to a lower value. In case of abnormal overheating of bearings, consult the KRUGER technical service. -
Page 47: Checking And Cleaning Parts In Contact With Fluids
CAUTION: All protection net must be inspected every month and replaced if necessary. CAUTION: In case of doubts, carry out checks more frequently or replace the protection net. 6.2.2 Checking and cleaning parts in contact with fluids The periodical cleaning of the impeller prevents vibrations that might be caused by any dust deposits that accumulate while the fan is running. -
Page 48: Dimensional Checks
6.2.4 Dimensional checks CHECKLIST – DIMENSIONAL CHECKS ON COMPONENTS COMPONENTS TO TYPE OF CRITERIA FOR RESULT CHECK CHECK/INSTRUMENT ACCEPTABILITY Impeller: presence of scratches or grooves on Visual Undamaged surfaces Reduction of thickness no Casing: sheeting Dimension/Caliper or greater than 10% in an ... -
Page 49: Axial Fan Operating Malfunctions
AXIAL FAN OPERATING MALFUNCTIONS Most frequent malfunctions The following Table lists the main problems that may be encountered: PROBLEM CAUSE SOLUTION Rotation speed too low Increase rotation speed Impeller partially blocked Eliminate obstruction Resistance pressure of system lower Check the resistance pressure value Power absorption lower than design than design value of the system... - Page 50 PROBLEM CAUSE SOLUTION Intrinsic bearing defects Check condition of bearings Check condition of bearings Bearing malfunctions due to unbalanced impeller or excessive belt Check belt tension (see paragraph tension 8.2) Check for correct coupling between Friction between moving parts moving parts Vibrations See previous point “Vibrations”...
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Page 51: Maintenance
MAINTENANCE Read this section carefully before carrying out maintenance operations on the fan. This will ensure greater conditions of safety for maintenance personnel and greater reliability of the work done. The safety rules to be respected during maintenance operations on the fan are as follows: ... -
Page 52: Bearing Lubrication
To facilitate the planning of programmed maintenance, KRUGER has compiled a Table (see paragraph 11.3) with general indications of the points to be monitored and the frequency of checks. Periodic cleaning and maintenance, together with lubrication, are essential to ensure correct fan operation and a longer operative lifespan of the fan. - Page 53 1000 1200 1500 1800 Bearing number 62XX 6210 63XX 72XX 73XX 2000Hrs 3000Hrs 1500Hrs 2000Hrs 1000Hrs 500Hrs 1500Hrs 2000Hrs 1000Hrs 1000 1200 1500 1800 Bearing number NU2XX NU214 NU3XX 2000Hrs 3000Hrs 1500Hrs 1000Hrs 2000Hrs 500Hrs 2000Hrs 1000Hrs 2000Hrs 1000Hrs 1000Hrs Table 8-2 Relubrication intervals and quantity of grease according to fan rotation speed Check and lubricate bearings at the intervals recommended by the motor manufacturer.
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Page 54: Adjusting Drive Belt Tension And Cleaning Belts
Adjusting drive belt tension and cleaning belts A simplified method for setting the correct tension of V-belts is as follows: Table 8-2 can be used to obtain the value P of the load for each belt for the profile type and the diameter of the smaller pulley. The value L can also be obtained from the same Table. -
Page 55: Checking And Cleaning Parts In Contact With Fluids
KRUGER Technical Service). For all information and for any modifications to be made on our products, please contact the KRUGER technical office in advance, specifying the machine type and serial number given on the fan name plate. IGB010.E8 – December 2020... -
Page 56: Dismantling And Reassembling Essential Components
Fan impellers with hub If the working point of the fan has to be changed and it is necessary to adjust the blade angle, please contact KRUGER Technical Office. CAUTION: The impeller must be moved with care, avoiding impacts that could alter its or deform it. - Page 57 3. Fit the bush into the hole in the pulley, taking care to align the threaded half-holes on the pulley with the unthreaded half-holes on the bush (Photo 1). There may be 2 or 3 of these holes (Fig. 9.1), as can also be seen in Table 9.1, depending on pulley size.
- Page 58 6. Fit the assembled bush, grub screws and pulley onto the motor shaft with the spline inserted in the corresponding slot in the bush hole. If necessary, widen the bush hole by inserting a suitable tool into the bush slit (Photos 4 and 5). Photo 4 Photo 5 7.
- Page 59 9. Use a straight edge of a suitable length to check correct alignment of the pulleys (Photo 7). Use a rubber hammer to move pulleys axially until the parallel misalignment has been corrected (Photo 8). Photo 7 Photo 8 10. Adjust motor Variation position to Variation...
- Page 60 12. Check correct pulley alignment again. CAUTION: Incorrect alignment causes excessive wear and greater friction on drive belts, higher power absorption by the transmission, noise and vibrations that reduce the effective lifespan of the transmission. Generally, the tolerance in pulley alignment in V-belt drive transmissions may not be greater than 0.5 degrees or 5 mm for each 500 mm of distance between centers (Figs.
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Page 61: Assembling And Dismantling Drive Belts
9.2.2 Assembling and dismantling drive belts 1. After checking correct pulley alignment, fit the belts. Tools should not be used to force the belts into place on the pulleys (Photos 10, 11 and 12). If necessary, reduce the distance between pulley centers by moving the motor closer. - Page 62 4. Check correct pulley alignment again. 5. Fit the complete system of transmission protection devices. CAUTION: After the first 8 hours of operation, stop the fan and check that pulley assembly screws are still fully tightened. 6. To remove the drive belts, repeat the previous operations in the reverse order.
- Page 63 FINAL DISMANTLING AND DISPOSAL OF FANS At the end of the life cycle of the fan, the machine and its accessories must be dismantled as indicated below, so as to allow the various components to be disposed of differently according to the type of material from which they are made.
- Page 64 10.1 Version 4 axial fans Fig. 10-1 Exploded view of version 4 fan With reference to Fig. 10-1, the correct dismantling sequence for version 4 fans is as follows: Protection Net (1); Terminal Box (7); ● Impeller (2); Terminal Support (8);...
- Page 65 10.2 Version 1 and 9 axial fans Fig. 10-2 Exploded view of version 1 and 9 fan With reference to Fig. 10-2, the correct sequence for version 1-9 fans is as follows: ducts Protection Net (1); Shaft (11); ● Upper Belt Back Cover (2);...
- Page 66 TECHNICAL APPENDICES 11.1 Tightening torques for nuts and bolts Tightening torques M of the Table 11-1 are valid under the following conditions: Type UNI 5737 bolts with hexagonal heads, type UNI 5931 and UNI 6107 screws with cylindrical head, in normal conditions of supply....
- Page 67 Tightening torques valid for fixing bolts with 12.9 resistance class for aluminium blade on fans with steel hub Bolt Torque (Nm) Torque must be checked with a torque wrench. Do not use galvanized nuts or bolts. Table 11-2 Tightening torques for blade fixing bolts on fans with steel hub IGB010.E8 –...
- Page 68 11.2 Checklist before starting fans The checks listed below are necessary, but could be insufficient in environments with particular types of risk. CHECKLIST BEFORE STARTING FANS CODE SERIAL NUMBER YEAR Identify installation type in accordance with paragraph 3.1. D Check compatibility of fan with type of application.
- Page 69 11.3 Programmed maintenance intervals The intervals of time suggested constitute a working basis for the customer, who must according to circumstances make any modifications necessary for the specific operating conditions. Programmed maintenance intervals according to intensity of use Intensity of use High Medium For all fans...
- Page 70 INDEX diameter; 36; 37; 54; 60 abrasion; 47 directives; 51 accessories; 19; 22; 29; 30 dismantling; 56; 61; 63; 64 Sound; 8; 27; 28; 29 ducts; 17; 19; 20; 21; 24; 34; 44; 48; 51; 55; 63; 65 air; 8; 17; 19; 22; 23; 24; 28; 44; 49; 50 duration;...
- Page 71 misalignment; 21; 34; 59 direction; 8; 17; 26; 46; 49; 68 motor pedestal; 63 safety; 6; 7; 18; 19; 20; 22; 24; 25; 32; 42; 45; 46; 47; electric; 8; 17; 42; 63 51; 68 screws; 40; 57; 58; 59; 60; 66 movement;...