EUL(B,F) FAN. Fläkt Woods 3178 GB Specifications are subject to alteration without notice

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Arlene Boyd
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1 Page Storage before installation Before starting Maintenance Cleaning Withdrawing the fan from the unit Applicable to size EUL(B,F) fans.2 To adjust the belt tension To change the belts Installation of HABASIT flat-belt drive..4 Moving the motor to adjust the belt tension Dismantling the EUL(B,F) belt guard (principle) Belt pulleys Grooved ball bearings with taper sleeve Changing the bearing of a type EULF-01-1 fan Type Y bearing with eccentric lock ring.7 Dismantling the plummer block with ball bearing Mounting the plummer block with ball bearing Air flow measurement with q-dysa and analogue flow indicating instrument.10 Checks Air flow measurement with q-dysa and analogue flow indicating instrument.11 Installation of the frequency converter.12 Fläkt Woods 3178 GB Specifications are subject to alteration without notice

2 Cleaning Wipe the fan with a cloth. It is particularly important to keep the impeller clean to avoid unbalance and vibration. Caution! Do not use liquids, since these may seep in between the sheet-steel joints and will be absorbed by the casing insulation (does not apply to casing type EUWA). Withdrawing the fan from the unit Applicable to size EUL(B,F) fans Fig. 1 Storage before installation The storage area must not be exposed to vibrations from the surroundings of a kind which can give bearing damage. If the storage period exceeds 3 months, the belt drive tension should be released and the fans should be rotated by hand at regular intervals. Before starting Do not start the fan if any damper on the inlet or discharge side are closed. The EULF fan (with forward-curved blades) must not be run if it is not connected to the ducting, and the inspection door must be closed to avoid tripping of the motor protection. However, the motor may be briefly energized with the inspection door open for checking the direction of rotation. Before starting the fan, check that the impeller rotates freely and that no objects which may be drawn in and damage the fan have been left inside the unit. When commissioning a new unit, check the belt tension and adjust, if necessary, after 30 min. of operation (see below). If the fan is equipped with steel spring anti-vibration mountings, the transport safety brackets must be removed prior to start. Maintenance The fan can be withdrawn from the unit as follows: 1. Tap out the inspection door hinge pins and remove the door. Unfasten and lift out the screen protection door if fitted. Unscrew and remove the fixed panel and post. 2. Back off the locking screws that interconnect the outer and inner guide rails. 3. Slip off the clamps that hold the fan connection piece against the fan outlet. 4. Withdraw the fan unit. The fan unit may be withdrawn so far that half of the fan motor extends outside the unit, but no further. Fig. 2 Locking screw After completed maintenance, push the fan back into the casing and follow the above procedure in the reverse order. Caution! Make sure that the fan outlet engages in the rear holder of the frame of the outlet connection. The fan should be inspected and cleaned every 12 months. The intervals between service are based on the assumption that the unit is in operation for about 2000 hours per 12-month period in a normal comfort installation. If the supply and/or exhaust air has a high dust content, the unit should be serviced more frequently. Check the belt tension every 6 months. The fan is accessible through the inspection door/panel. Caution! Isolate the power supply before carrying out any inspection and service work. Fig. 3 Fläkt Woods 3178 GB Specifications are subject to alteration without notice

3 To adjust the belt tension The belts must be correctly tensioned to ensure good contact with the pulleys. If insufficiently tensioned, the belts may slip, and if excessively tensioned, the motor and fan bearings may be overloaded. When correctly tensioned, the belt deflection L will be 15 mm per metre of distance between centres (c/c) when a force P (N) is applied. The deflection and force should preferably be measured by means of a tensiometer, see Fig. 4 and 5. The force P is dependent on the belt type as shown in the table below. The belts should be rechecked after about 30 minutes of operation. To change the belts To change the belts, first move the motor towards the fan by a sufficient amount to enable the old belts to be easily prised off the pulleys and the new belts to be prised on. Change all the belts at the same time. Use matched belts (with the same production number), i.e. belts of exactly the same length. Tension the belts according to the instructions on this page. Retension the belts after 30 minutes of operation. Belt section SPZ SPZ SPA SPA SPB SPB SPC SPC Effective diameter of smaller pulley, mm< P in N/belt Normal Max. 1) ) Newly fitted belts. Fig 6. Adjust the belt tension by moving the motor as shown in Fig. 8 and Fig. 9 respectively. c/c L P Fig cm N Fig. 5 Fläkt Woods 3178 GB Specifications are subject to alteration without notice

4 Installation of HABASIT flat-belt drive Caution! Never fit an ice cold and stiff belt; allow the belt to thaw out, become flexible and pliable before fitting it. Exposure to cold impairs the elasticity of the belt material. This will make the belt difficult to fit and may eventually cause it to break apart at the weld. 1. Fit the motor and fan pulleys to their corresponding shafts but do not tighten the bushes. 2. Fit the belt around the pulleys and push the motor by hand to stretch the belt. 3. Align the pulleys by means of a straight edge and tighten the pulley bushes. 4. Tighten the motor mounting bolts only so hard that the motor will still be able to slide on the guide rails. 5. Measure the longest free measurement distance on the belt to the nearest 100 mm. The belt must not be in contact with the pulleys along the measurement distance. 6. Remove the belt, place it on a flat surface and mark off the above measurement distance to the nearest 100 mm. 7. Refit the belt to the pulleys and tension it by means of the tensioning screws of the motor guide rails. Keep the shafts of the motor and fan as parallel as possible. 8. Conclude the tensioning when the belt has achieved the elongation specified in the table. 9. Rotate the belt drive by hand in both directions. If the belt tends to move axially in one direction or the other, this is because the shafts are not parallel. Adjust by means of the tensioning screws on the slide rails until the belt remains in the centre of the pulleys when the pulleys are rotating. 10. When tensioning has been completed and the belt remains in position when the drive is rotating, securely tighten the motor mounting bolts. Start by tightening the bolts nearest to the pulley. Before tensioning (mm) Distance between marks After tensioning (mm) Type: F 0, F 1 Type: F 14, A 2, A 3, A 4 2,8% 2,5% ,8 102, ,6 205, ,4 307, ,2 410, ,0 512, ,8 615, ,6 717, ,4 820, ,2 922, ,0 1025,0 Tension the belt until the elongation tabulated above has been achieved. Fig. 7 Measurement distance Use a straight edge to check that the pulleys are in line. If the belt moves sideways, adjust by means of the tensioning screws of the guide rails or motor bracket. Fläkt Woods 3178 GB Specifications are subject to alteration without notice

5 Moving the motor to adjust the belt tension The belt tension can be adjusted by moving the motor. EUL(B,F)-60 through -84 Tensioning screw Adjustment screw 1. Remove the belt guard, if fitted. 2. Slightly back off the 4 mounting screws. 3. Use the tensioning screws to adjust the belt tension. 4. Check the alignment of the drive. Align by means of the adjustment screw. 5. Retighten the mounting bolts. 6. Refit the belt guard if one was fitted. Tensioning pad EUL(B,F)-11 through -53 Mounting screw Slid rail Tensioning screw Mounting screw Fig. 9 Adjustment screw Mounting bolt Dismantling the EUL(B,F) belt guard (principle) Adjustment screw Sliding cover plate for motor shaft Fig. 8 Fig. 10 Fläkt Woods 3178 GB Specifications are subject to alteration without notice

6 Belt pulleys To remove and refit the belt pulley Never hammer the belt pulley onto or off a shaft, since even light blows and shocks may damage the bearing, which will give rise to noise and an abnormally high rate of wear. To remove: 1. Remove the screws, oil them sparingly and screw one of them into the extractor hole, i.e. the tapped hole in the bush, see Fig Tighten the screw until the bush is free of the hub and the unit is free of the shaft. 3. Remove the pulley and the bush from the shaft as one unit. To fit: 1. Clean the bore of the pulley and the inside and outside of the bush to remove any anti-corrosion agent, and make certain that the surfaces are completely free from oil and dirt. Fit the bush into the pulley. 2. Oil the screws sparingly and loosely screw them into the tapped holes in the pulley, see Fig Clean the shaft and fit the pulley and bush onto the shaft as one unit. 4. Tighten the screws alternately until they are all securely tightened. Fig. 11 Fig. 12 Screw Extractor hole Screw Self-aligning roller bearings (the bearing blocks have grease nipples, see Fig. 13 Lubrication: The SKF type 222(00) CCK bearings are mounted on H3(00) taper sleeves in the SKF type SNA 5(00) TAV bearing block. See Fig. 13. These self-aligning roller bearings are equipped with grease nipples and should be lubricated once a year if they are run 8 hours a day and twice a year if they are run around the clock. Lubricate with about 100 grammes of grease per bearing. Use SKF ALFA LUBE LG MT2 or equivalent grease. To dismantle: 1. Remove the top half of the bearing block. 2. Fold back the tabs of the tab washer and back off the nut a few turns. 3. Mark the position of the bearing block and then release its bottom half from the support arm. 4. Raise the shaft with the bearing block about one millimetre. Use a drift or a piece of pipe to the nut to tap the taper sleeve out of the bearing. Remove the bearing together with the bottom half of the bearing block from the shaft. Fig. 13 To refit: 1. Inspect the seals and replace them if they are defective. Fit the seals, taper sleeve and bearing onto the shaft. Fit the bottom half of the bearing block in the appropriate position as marked earlier. Fit the bolts and nuts, but do not tighten them. 2. Rotate the outer race of the bearing through a few revolutions to ensure that the rollers are in the correct position. Fit the tab washer and nut onto the sleeve and tighten the nut by hand, so that the shaft, sleeve and bearing are firmly in contact with one another. Lower the shaft with the bearing into the bottom half of the bearing block. 3. Mark one of the tab washer tabs which is in line with a slot in the nut. Then tighten the nut so that the slot is displaced five tab pitches from the marked tab, and then fold one of the washer tabs into a suitable slot in the nut. See Fig Pack the bearing block and the spaces between the rollers with SKF ALFA LUBE LG MT2 or equivalent grease. 5. Fit the top half of the bearing block and bolt it in position. 6. Secure the bearing block to the support arm by tightening the bolts. Fig. 14 Tab pitches Fläkt Woods 3178 GB Specifications are subject to alteration without notice

7 Grooved ball bearings with taper sleeve (the bearing block has not grease nipples The SKF type 62(00) 2RS1K + H2(00) bearings are maintenance-free and should not be greased. The bearing is secured to the shaft by means of a taper sleeve. See Fig. 15. Type Y bearing with eccentric lock ring (the bearing blocks have no grease nipples) SKF type YET bearings are maintenance-free and must not be relubricated. The bearing is secured to the shaft by means of an eccentric lock ring as shown in figure 16. The bearing is glued to the shaft. To remove: 1. Fold back the tab of the tab washer and back off the nut a few turns. 2. Apply a light blow to tap the taper sleeve out of the bearing. Use a hammer and a drift. 3. Remove the bearing unit from the shaft. To refit: 1. Fit the bearing, taper sleeve, tab washer and nut assembly onto the shaft. Fit the tab washer so that the tabs slope outwards, and fit the nut with the chamfered side towards the bearing. 2. Fit the bearing assembly onto the shaft. 3. Tighten the nut by hand, so that the shaft, bearing and taper sleeve are firmly in contact with one another. 4. Mark one of the tab washer tabs which is in line with a slot in the nut. Then tighten the nut so that the slot is displaced by the number of tab pitches (from the marked tab) specified in the table below, and then fold one of the washer tabs into a suitable slot in the nut. Fig. 15 Bearing type SKF RS1K SKF RS1K SKF RS1K SKF RS1K SKF RS1K SKF RS1K Number of tab pitches 1,5 1,5 1,5 2 2,5 3 Changing the bearing of a type EULF-01-1 fan To remove fit: Back off the spring clips that are seated on the shaft against the bearing. Detach the bearing support arms from the casing and dismantle the arms from one another. Extract the bearing from the shaft using a conventional extractor tool. The new bearing with rubber ring is to be assembled together with the support arms to form a complete unit. Push the bearing unit onto the shaft. Use a piece of tubing of appropriate size, hold it against the inner ring of the bearing and tap the bearing unit so far on the shaft that the support arms come in contact with the fan casing. During this operation, it may be advisable to turn the fan vertically so that the other shaft end will rest against the floor. This will prevent a load from being applied to the opposite bearing while the first bearing is tapped into position. Back off the support arms slightly to prevent any tension on the bearing. Tighten the support arms together and tighten the bolts that secure them in the fan casing. Fit the spring clips on the shaft and push them hard up against the bearing. Fig. 16 To dismantle: 1. Back off the stop screw using an Allen key. 2. Screw off the eccentric lock ring (usually counter to the direction of rotation of the fan). Mark the position of the bearing on the shaft. Remove the support arm. 3. The bearing is glued to the shaft. Use an extractor tool to remove the bearing from the shaft. Fasten the claws of the extractor tool to the inner ring of the bearing. The bearing can also be removed by tapping the inner ring of the bearing with a hammer. To refit: 1. Wipe the inner surface of the bearing to remove the protective film. Put the bearing into the bearing damper. 2. Mount the support arm on the bearing and bearing damper. 3. Clean the shaft carefully. Apply glue (Loctite 603) to the shaft. Fit the support arm with bearing at the marked position on the shaft. Secure the support arm to the fan casing. 4. Fit the eccentric lock ring to the inner ring of the bearing and turn it firmly by hand in the direction of rotation of the fan until the lock ring is locked in position. 5. Tighten the stop screw using an Allen key. If you can measure the torque, do not exceed the value specified in the table below. Excessive torque can cause the inner ring of the bearing to crack. Fan size Type of LF LB LF LB LF LB LF LB LF LB LF LB LF LB LF LB impeller Torque (Nm) Fläkt Woods 3178 GB Specifications are subject to alteration without notice

8 Dismantling the plummer block with ball bearing Step 1 Before starting support the shaft carefully by using a band or a rope. Place the band/rope between the bearing bracket and the impeller. Please note that the impeller weighs 100 to 250 kg depending on the fan size. For detailed weight, please refer to the spare parts list. Step 4 Loosen the bolts of the plummer block and suspend the shaft with the rope/band. Tighten the rope/band so that the impeller does not touch the inlet cone. The bearing is glued to the shaft. Use an extractor toll to remove the bearing from the shaft. Use an extractor tool to remove the bearing from the shaft. Attach the claws of the extractor tool to the inner ring of the bearing. You can also remove the bearing by tapping the inner ring of the bearing with a hammer. Step 2 Back off the stop screw using an Allen key. Step 5 Replace the plummer block. Step 3 Unscrew the eccentric locking collar by turning it in the direction that is opposite to the direction of rotation of the fan. Measure and mark the position of the bearing on the shaft x = mm X 1. Bearing housing 2. Grease nipple 3. Eccentric locking collar 4. Stop screw Fläkt Woods 3178 GB Specifications are subject to alteration without notice

9 Mounting the plummer block with ball bearing Step 1 Wipe the inner surface of the bearing to remove the protective film. Apply glue (Loctite 603) to the shaft. The glue fastens the joint and prevents corrosion. Mount the bearing at the marked position on the shaft. Step 4 Tighten the stop screw using an Allen key. If you can measure the torque, do not exceed the relevant value. Excessive torque can cause the inner ring of the bearing to crack. Permissible torque, M for the stop screw is 27 Nm. Glue Lim Step 2 Fasten the bolts of the plummer block. Step 5 Rotate the fan impeller and conduct a final inspection. Step 3 Mount the eccentric locking collar to the inner ring of the bearing and turn it firmly by hand in the direction of rotation of the fan until the collar is locked in the position. Fläkt Woods 3178 GB Specifications are subject to alteration without notice

10 1 (Pa) 3 MODEL M 700 PA MANOMETER DWYER INSTRUMENTS, INC. MICH. CITY IND U.S.A. STING Air Handling Unit Air flow measurement in EUL(B,F) Air flow measurement with q-dysa and analogue flow indicating instrument p q-dysa flow sensor Filling screw + Pa 1.4 EULF Resetting screw J q = p m /s Level Flow indicating instrument Checks The zero setting of the manometer should be checked at regular intervals. To check the zero setting, remove the hoses connected to the pressure connections of the manometer. Whenever the need arises, use the resetting screw to adjust the zero setting. Top up with manometer liquid, if required. The measurement nozzle should be blown clean with compressed air once or twice a year depending on the quality of the air. This can easily be done by disconnecting the hoses from the instrument and blowing them with compressed air to free the air passages from impurities. Another type of pressure gauge may also be connected for use as an alternative meter or for checking the performance of the flow indicating instrument. In this case, fit T-nipples in the hoses to the indicating instrument and connect them to the pressure gauge. The air flow can be calculated by the expression: q = 1 p m 3 /s k where the value of k is stated on the unit rating plate and p is the measurement pressure in Pa. Fläkt Woods 3178 GB Specifications are subject to alteration without notice

11 EUL(B,F) Air flow measurement Air flow measurement with q-dysa and analogue flow indicating instrument EU size 1) 2) size 1 2) size 2 2) size 3 2) size 1 2) size 2 2) size 3 size 2 normal normal normal reinforced reinforced reinforced K-factor m 3 /s at K-factor m 3 /s at K-factor m 3 /s at K-factor m 3 /s at K-factor m 3 /s at K-factor m 3 /s at K-factor m 3 /s at 500 Pa 500 Pa 500 Pa 500 Pa 500 Pa 500 Pa 500 Pa 11 30,76 0, ,89 1,41 21,34 1,05 16,42 1, ,07 2,22 16,42 1,36 10,72 2,09 8,12 2, ,21 2,72 10,72 2,09 8,12 2,75 6,51 3,43 6,51 3, ,21 2,72 10,72 2,09 8,12 2,75 6,51 3,43 6,51 3, ,07 4,41 6,51 3,43 4,57 4,89 3,90 5,73 6,51 3,43 4,57 4,89 3,90 5, ,61 6,19 4,57 4,89 3,90 5,73 3,03 7,38 4,57 4,89 3,90 5,73 3,03 7, ,61 6,19 3,90 5,73 3,03 7,38 3,90 5,73 3,03 7, ,61 6,19 4,57 4,89 3,90 5,73 3,03 7,38 4,57 4,89 3,90 5,73 3,03 7, ,89 7,74 3,90 5,73 3,03 7,38 2,30 9,72 3,90 5,73 3,03 7,38 2,72 8, ,22 10,1 3,03 7,38 2,30 9,72 1,99 11,24 3,03 7,38 2,72 8,22 2,23 10, ,22 10,07 2,30 9,72 1,99 11,24 2,72 8,22 2,23 10, ,22 10,1 3,03 7,38 2,30 9,72 1,99 11,24 3,03 7,38 2,72 8,22 2,23 10, ,69 13,2 2,30 9,72 1,99 11,24 1,50 14,91 2,72 8,22 2,23 10,03 1,75 12, ,4 16,0 1,99 11,24 1,50 14,91 1,35 16,56 2,23 10,03 1,75 12,78 1,35 16, ,4 16,0 1,99 11,24 1,50 14,91 1,35 16,56 2,23 10,03 1,75 12,78 1,35 16, ,09 20,5 1,50 14,91 1,35 16,56 1,08 20,70 1,75 12,78 1,35 16,56 1,08 20, ,85 26,3 1,35 16,56 1,08 20,70 0,80 27,95 1,35 16,56 1,08 20,70 0,80 27, ,85 26,3 1,35 16,56 1,08 20,70 0,80 27,95 1,35 16,56 1,08 20,70 0,80 27, ,08 20,70 0,80 27,95 0,68 32,88 1,08 20,70 0,80 27,95 0,68 32, ,85 26,3 1,35 16,56 1,08 20,70 0,80 27,95 1,35 16,56 1,08 20,70 0,80 27, ,08 20,70 0,80 27,95 0,68 32,88 1,08 20,70 0,80 27,95 0,68 32, ,80 27,95 0,68 32,88 0,52 43,00 0,80 27,95 0,68 32,88 0,52 43,00 Fläkt Woods 3178 GB Specifications are subject to alteration without notice

12 Fan EUL(B,F) Installation of the frequency converter Warning: Incorrect installation of the frequency converter can damage the bearings in the motor. It is Fläkt Woods' policy to only except claims when the motor and frequency converter have been supplied and installed by us. Damage to the motor will not be accepted when the motor has been connected to the frequency converter by an installation engineer not provided by Fläkt Woods. The frequency converter and the motor must be installed by a qualified electrician with good knowledge of speed regulated, drive system installations (frequency converters) and EMC-safety. The following recommendations should be seen as a supplement to the manufacturer's installation instructions. In those cases where there are differences, the manufacturer's instructions shall take precedence over the following; this is due to the warranty undertaking from the manufacturer. General The installation between the motor and the frequency converter should be carried out using screened, unbroken 4- wire cable intended for EMC-installations for motor operations, the screen shall have at least 80% optical density, for example, Nexan s NCY or Ölflex Classic. The screen shall have 360º contact with the casing both in the motor and in the frequency converter to give the maximum contact surface. Safety switches or connection boxes fitted between the frequency converter and motor are not recommended. Motor The cable gland in the motor's outlet box should consist of an EMC approved cable gland, for example, Miltronic SKINTOP MS-SC. The screen conductor may only be connected via EMC unions, not to earth bolts. The screen should have 360º contact with the casing Casing Screen Frequency converter Connection of the screening conductor shall be made via an EMC approved union in the frequency converter's casing or by using a clamp intended for this purpose. The screen conductor must not be connected to an earth bolt. The screen should have 360º contact with the casing Screen Insulating tape Connection of the screen conductor In those cases the screen conductor must be connected to an earth bolt in the motor or frequency converter, this should be done so that the impedance is as low as possible, in these cases, this conductor is limited in length to 5 times its width. For example, when the screen conductor is 1 cm wide it must not be longer than 5 cm. Insulating tape Diverse Besides this, the following should be observed: type of mains supply. local regulations and provisions. the manufacturer's installation instructions for the frequency converter. Outputs over 22 kw In the event of outputs over 22 kw, a symmetrical screened cable with concentric or in some other way symmetrically designed protective earth conductor should be used, please refer to the installation instructions for the frequency converter for recommendations concerning these installations. Fläkt Woods 3178 GB Specifications are subject to alteration without notice

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