918149-0 GB Installation and Maintenance Novax Smoke Exhaust Fan Type ACN Smoke 1. Application 2. Handling 2.1 Marking 2.2 Weight 2.3 Transport 3. Storage 4. Installation 4.1 Prior to attachment 4.2 Attachment 4.3 Mounting brackets 4.4 Duct connection 4.5 Electric connection 5. Start of operation 5.1 Prior to start of operation 5.2 Motors with Y/Δ starting 5.3 Starting procedure 6. Maintenance 6.1 Protection prior to inspection and maintenance 6.2 Fan casing 6.3 Impeller 6.4 Motor 6.5 Dismounting of motor 6.6 Mounting of motor 6.7 Blade pitch adjustment 6.8 Fault localization 7. Test of operability and operating condition 7.1 Periodic inspection 8. Sound 9. Attestation of conformity 1. Application are sturdy axial flow fans designed for both the daily ventilation requirements under normal conditions and smoke/heat exhaustion in the event of a fire in all kinds of commercial and industrial buildings. are tested and approved to meet the requirements of fans for smoke exhaustion class F300 (300 C for 60 minutes) and F400 (400 C for 120 minutes) according to standard: EN 12101-3. 2. Handling 2.1 Marking The ACN smoke exhaust fan is provided with a standard nameplate with Novenco's name and address. It also mentions type/size e. g. ACN 1000/380, number of blades, year of production, weight, serial number/order number (production number). Furthermore, it mentions maximum temperature and working period in minutes and if the fan is supplied with approval number, class/category are also mentioned as well as test standard applied (EN 12101-3). Fan pressure, air quantity, output and maximum speed per minute. The fan is also provided with a motor nameplate with relevant motor data including insulation class of the motor. 160, 230, 280, 330 and 380 403 578 Type ACN-smoke Fan size 2.2 Weight The total weights shown in table 1 apply to axial flow fan type ACN-smoke. The total weight is determined on the basis of type/size of fan and maximum motor size employed and is in terms of kg. 2.3 Transport When transporting the fans take care that no water (e. g. rainwater) gets into the motor or other sensitive components. are delivered on pallets or bearers to allow fork-lift transport. The forks of the fork-lift truck must lift underneath the frame. Set down the fan as slowly as possible and on a soft foundation. Vibrations, shocks, and fall may result in imbalance and deformation and may damage the motor bearings. Motor size -90-100 -112-132 -160-180 -200-225 -250-280 400 47 57 500 62 72 80 95 560 75 85 93 108 185 630 80 90 98 113 190 222 710 93 103 111 126 203 235 800 102 112 120 135 212 244 900 118 128 136 151 228 260 1000 154 164 172 187 264 296 900 170 247 1000 207 284 316 1120 205 220 297 329 1250 222 237 314 346 1400 255 332 364 900 206 283 315 1000 245 322 354 442 1120 257 272 349 381 469 554 1250 307 322 399 431 519 604 689 1400 459 491 579 664 749 899 1600 616 701 786 936 Motor type -90-100 -112-132 -160-180 -200-225 -250-280 Motor Weight (kg) 20 30 38 53 130 162 250 335 420 570 Table 1. Example of total weights (Fan incl. motor, LOHER 4-pole) [kg] MU 14347 0610 1
3. Storage can stand outdoor storage for 1 month provided the packing is intact. Fans with no packing must be stored in a sheltered place. If the fans are stored indoors under wellventilated conditions with no risk of condensation the storage period may be extended to 6 months. The storage place must not be exposed to vibrations likely to damage the motor bearings. If the storage period exceeds 3 months, it is recommended to turn the impeller regularly by hand. 4. Installation Figure 1. Mounting foot for type ACN 4.1 Prior to attachment Prior to attachment make sure that the impeller rotates freely in the fan casing, wherever possible with equal distance between blade tip and fan casing throughout the circumference. 4.2 Attachment Fans must always be installed so that the rotating parts cannot be touched. The fan must be provided with a wire guard on the inlet and outlet sides. If ducts are connected, they should be provided with wire guards on the inlet side. The fan is provided with an arrow-plate denoting the direction of air flow through the fan casing. See during installation that the fan is oriented so as to provide the desired direction of air flow in the system. The best way of installing the fan is using mounting feet (available as optional extras), but it may also be suspended in the fan casing flanges or in special carriers. The carriers must not hamper the free inlet and outlet of air. When the fan has been finally secured make sure that the impeller rotates freely in the casing. If the motor is provided with drain holes for condensed water the fan must be oriented so that the holes turn downwards (lowest point). Generally, it is of the utmost importance for the performance and sound level of an axial flow fan that the air flow is unimpeded and free from eddies. Figure 2. ACN with mounting foot and antivibration mountings 4.3 Mounting feet Mounting feet for type ACN-smoke consist of two mounting plates (see fig. 1item 01). Mount two stiffeners (item 02) between these by means of joining elements (item 03). Stiffeners are only available from fan size 630 mm inclusive. To prevent vibrations spreading from the fan to the surroundings, anti-vibration mountings may be inserted between fan and support and flexible connections fitted in the ducts before and after the fan (available as optional extras). Secure anti-vibration mountings (fig. 2 item 06) in the mounting feet by means of bolts (item 05). Mount base plates (item 07) for attachment in the foundation/floor at the bottom of the rubber element. The natural frequency of the support must differ at least 20% from the fan speed. The anti-vibration mountings serve to ensure that the natural frequency of the system does not exceed 10 Hz and that the damping is at least 80% at 1500 r.p.m. 2
4.4 Duct connection In order to achieve the capacities stated on the performance curves the fans must be provided with ducts as shown in fig. 3 and fig. 4. The duct or inlet cone on the fan inlet side must be designed to ensure smooth and undisturbed flow of the air; ACN-smoke fans are prepared for circular duct connection on both inlet and outlet sides. Flanges supplied as standard for type ACN comply with EUROVENT 1/2. Systems with higher vibration level or more exacting performance requirements must be provided with expansion joints between fan and duct, and ducts must not be supported by the fan. It is important to allow for free areas to facilitate mounting and dismounting as well as ordinary maintenance. Figure 3. Installation in duct system Figure 4. Inlet cone for connection to duct 4.5 Electric connection Connection to the mains is made according to current legislation and by authorized personnel. Connection to the mains is effected direct in the motor terminal box or in the terminal box mounted on the outside of the fan casing (see fig. 6). Connection is made according to connection diagram on the inside of the terminal box cover. Having wired the motor terminal box, check that the direction of rotation of the impeller complies with the arrow-plate fitted on the outside of the fan. 5. Start of operation 5.1 Prior to start of operation Approval (prior to start of operation). After installation of the axial flow fans their correct installation, operation and interaction must be established through an approval test. The person responsible for the operation of the system must take the initiative for this test. The approval test must be confirmed by the person responsible for the operation of the system and the documentation must be kept and produced whenever asked for. Prior to start of operation check that the fan and duct connections are clean and free from tools and foreign substances. Also check that the electric connections meet the prescribed requirements, that any wire guard fitted on the fan inlet or outlet side is correctly mounted and that the direction of rotation of the fan complies with the arrow-plate (check by short-time operation). 5.2 Motors with Y/Δ starting The relay must be set to the calculated time. 5.3 Starting procedure Start the fan Check that no abnormal noises occur. See that the vibration level is normal. The vibration level at the fan operating speed must not exceed 7 mm/s rms, measured radially at 2 points, 90º offset and at the free shaft end of the motor. Otherwise, the fan must be balanced. Operation at a higher vibration level exceeding 11 mm/ s rms* is not allowed in case of fixed fan position. Operation at a higher vibration level exceeding 18 mm/s rms* is not allowed in case of position on feet or anti-vibration mountings. After 30 minutes of operation check that the fan operates normally. * ISO 2954, Requirements for instruments for measuring vibration severity. 6. Maintenance 6.1 Protection prior to inspection and maintenance When the fan is out of operation for reasons of inspection or repair/maintenance, the electric system must be switched off and protected so that the fan is not cut in unintentionally. 6.2 Fan casing The fan casing requires no maintenance other than ordinary cleaning. If the fan casing is painted, the painted surface should be checked regularly and repaired where necessary. 3
6.3 Impeller From the factory the impeller is supplied with the blades adjusted to the pitch corresponding to the desired operating point (pressure and air flow) at the fan speed in question. To ensure vibration free operation the impeller has been carefully balanced in this position. Vibrations occurring during operation will normally be due to accumulations of dust or dirt on the hub and blades, and will disappear after cleaning. Should this not be the case, expert assistance should be called in immediately, as continued vibrations will shorten the life of the motor bearings. 6.4 Motor The motor normally only requires maintenance of the bearings as indicated in the maintenance instructions for electric motors. 6.5 Dismounting of motor for types ACN-smoke (see fig. 5) Prior to commencing the work, switch off the current and disconnect the motor cable. Next, dismount any ducts on the fan inlet and outlet sides. Remove the impeller centre screw (see item 01), centre disc (see item 02) and hub cover (see item 03). Dismount the impeller by means of a puller fastened in the 2 threaded holes of the hub boss/threaded holes for puller (see item 05). Detach the motor by loosening the screws in the motor shell (see item 06). Now the motor (see item 11) and motor flange (see item 10) can be removed. In dismounting and disassembling the fan be careful not to expose the individual parts to shocks etc. likely to damage the motor bearings or other fan components. 6.6 Mounting of motor for types ACN-smoke (see fig. 5) After servicing remount the motor, take care that the motor flange (item 10) is correctly located and that the motor shaft is concentrically placed in the fan casing before tightening the bolts (item 06). Mount the impeller (item 04) on the motor shaft by means of a tool fastened in the threaded hole of the motor shaft. Fix the impeller hub to rest against the motor shaft collar. Check that the blade clearance of the impeller is the same throughout the circumference of the casing. If that is not the case, adjust the motor location in the suspension arrangement. Now mount centre screw (item 01), centre disc (item 02), and hub cover (item 03). Replace lock washers/lock nuts during fan assembly. Finally connect motor cable (item 13) in terminal box (item 12) and ducts, if any. To start the fan follow the procedure described in section 5. Start of operation. 6.7 Blade pitch adjustment The blade pitch has been adjusted in the factory with a special tool (mounting fixture) to deliver the performance required by the customer/order on delivery. If the fan performance is required to be changed it is possible to change the blade pitch. It requires knowledge of the motor load and the max. permissible blade pitch on the graph as related to the motor rating (in case of blade pitch increase). Contact Novenco before any such adjustment of the blade pitch. Novenco can supply special tools for blade pitch adjustment and instructions for impeller balancing. The brochure Blade Angle Tool is available on request. Figure 5. Dismounting/mounting of axial flow fan 4
Novenco A/S Industrivej 22 Tel. (+45) 70 12 42 22 DK-4700 Naestved Fax (+45) 55 75 65 50 Denmark www.novencogroup.com External terminal box Electric cable/ Flexible metallic conduit 9. Attestation of conformity EU Attestation of Conformity The Machinery Directive 2006/42/EC, part 2, A Metal cable gland (relief) Nut Novenco A/S Industrivej 22 DK-4700 Naestved Hereby declares that axial flow fans type ACN-smoke 400-1600 have been manufactured in conformity with the Council's directives 2006/42/EC regarding mutual approximation of the machinery laws (the Machinery Directive) of the member states. Figure 6. Electric connection through fan casing to external terminal box 6.8 Fault localization These are likely causes of breakdowns/ failures: Deficiency in performance: Blocked air supply to the fan inlet side: Damper closed Duct choked Supply fan, if any, stopped Motor defective Motor disconnected Wrong direction of rotation of impeller Noise/vibrations: Bearings in electric motor defective Impeller out of balance Impeller worn/damaged Bolts/components loose Impeller blades have different pitch angles Fan operates in the stalling area. May result in breakdown. Repair failures, see Deficiency in performance. to a time switch or carbon monoxide alarm. 7.1 Periodic inspection Novax smoke exhaust fans must always be kept in operational and perfect condition by the user. The fans should be inspected twice a year to ensure a satisfactory function and long life. The inspection must include: Measuring of power consumption Measuring of vibrations on fan casing Check of torque for fixing bolts and correction of it, if necessary. Visual inspection of impeller, fan casing, and connection to the electricity supply Cleaning: inside with pressure air outside with water It is recommended to enter all values and observations in a log. Applied standards: EN ISO 12100-1: Safety of machinery part 1 EN ISO 12100-2: Safety of machinery part 2 EN ISO 13857: Safety of machinery - Safety distances EN 12101-3: Smoke and heat control systems - Part 3, class 1 EN 60204-1: Safety of machinery - Electrical equipment of machines Part 1: General Requirements It is a condition that Novenco's instructions for installation have been followed. Naestved, 01.06.2010 Steen Hansen R&D Manager Novenco A/S 7. Test of operability and operating condition ACN-smoke approved for smoke control must be tested four times a year as to operability and operating condition. If smoke exhaust fans type ACN-smoke are used for standard ventilation as well, a test every six months is sufficient if the regular starts of the fans ensure at least one start a day - as a result of connection 8. Sound The sound generation of the fans depends on installation and operating conditions, which means that no general data of the sound generation can be given. Reference is made to our catalogues or computer programs for calculation of the specific sound generation. 5