Jet Fan Types AUC/ARC/AUR/ARR/AUO/ARO Installation and Maintenance

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Maximilian Arnold
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1 GB Jet Fan Types AUC/ARC/AUR/ARR/AUO/ARO Installation and Maintenance 1. Main components 2. Application 3. Handling 3.1 Marking 3.2 Weight 3.3 Transport 4. Storage 1. Main components: Types ARC, ARR and ARO Installation 5.1 Prior to installation 5.2 Installation 5.3 Wiring 6. Commissioning 6.1 Prior to start of operation 6.2 Starting procedure 7. Maintenance 7.1 Maintenance of fans 7.2 Protection prior to inspection and maintenance 7.3 Cleaning 7.4 Vibrations 7.5 Motor 7.6 Dismounting of motor 7.7 Mounting of motor 7.8 Blade pitch adjustment 7.9 Troubleshooting 8. Periodic inspection Types AUC, AUR and AUO 11 Item 01: Inlet cone Item 02: Silencer suction side Item 03: Impeller Item 04: Motor Item 05: Motor suspension Item 06: Isolator switch Figure 1. Main components for Jet Fan 10 Item 07: Fan casing Item 08: Silencer pressure side Item 09: Deflector Item 10: Suspension brackets for fan Item 11: Wire guard Item 12: Centre fairing 9. Declaration of Conformity ISO 9001 Novenco is ISO 9001 certified. According to our internal standards all fans are subject to an inspection and test run prior to shipment or stocking. Only approved fans are brought forward to shipment. 2. Application Jet fans types AUC/ARC/AUR/ ARR/ AUO/ARO are standard fans suitable for conventional installations for ventilation of car parks and in the event of a fire. The jet fan must not be used in hazardous environments. Temperature range: Air: -20 C to 40 C Surroundings -20 C to 40 C Fire: Max 300 C for 60 minutes See specification on motor plate Max 200º for 120 minutes 3. Handling 3.1 Marking The jet fan is provided with a standard nameplate with Novenco s name and address. It also mentions product type e. g. AUO 380/160-4, serial number, order number, max r.p.m., weight, production year, CE-markings and motor name plate. Jet fans for smoke control are provided with nameplates with additional data including air performance data, max temperature, working period, category/ class according to relevant standards and regulations. MU

2 3.2 Weight Total weight of jet fan types: AUC/ ARC AUR/ ARR AUO/ ARO Size 290: 90 kg 65 kg 80 kg Size 380: 140 kg 85 kg 110 kg Size 500: 200 kg 160 kg 3.3 Transport The jet fans are delivered on pallets to allow fork-lift handling. Make sure to handle the jet fan so the fan casing is not deformed. A C 4. Storage The jet fan cannot stand outdoor storage. If the fans are stored indoors under wellventilated conditions with no risk of condensation the storage period is 6 months. The storage space 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. Prior to installation check the fan for damages and corrosion. Prior to start of operation make sure there is no condensate in the motor. 5. Installation 5.1 Prior to installation Prior to installing 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. 5.2 Installation The jet fans must be installed so that there is at least 0.5 m to nearest obstruction on the inlet side and at least 2 m to a beam on the outlet side. If the beam is higher than 0.4 m lower the fan correspondingly. The fan is provided with arrows indicating the direction of air flow and rotation. Within a smoke reservoir the jet fans must be fastened to non-flammable ceilings/materials only and must meet current national requirements. When installing make sure that the fans are providing air in the desired direction. In general the jet fans must be suspended/mounted so that there is no risk of falling down during a possible fire. Item 01: Jet fan Item 02: Expansion bolt Item 03: Ceiling Expansion bolts without approval for high temperature must be made from steel, must at least be size M8 and must be mounted twice as deep as recommended, however, at least 60 mm deep. Statically they must not be loaded with a pull of more than 500 N. Dowel nails whose load capacity under fire condition are certified must be mounted and loaded as stated in the approval. The jet fan must be fixed to a horizontal plane with a natural frequency at least 20% from the fan speed. After final installation, make sure that the impeller rotates freely in the fan casing. It is of the utmost importance for the performance and sound level of the jet fan that the air flow is unimpeded and free from eddies. B A B C AUC/ARC ø12*28 M10 AUC/ARC ø14*28 M12 AUC/ARC ø14 M12 AUR/ARR ø12*28 M10 AUR/ARR ø14*28 M12 AUO/ARO ø14*28 M12 AUO/ARO ø14*28 M12 AUO/ARO ø14*28 M12 Figure 2: Installation of jet fan 5.3 Wiring The power supply cable to the fan must be manufactured and fitted according to national regulations. The connection must be executed by authorized personnel only. The motor is connected through thermal relay based on motor nominal current. The connection is effected direct in the switch mounted either outside (AUR/ ARR) (AUC/ARC) or in the flush mounted terminal box (AUO/ARO). For connection see wiring diagrams figures 3A, 3B and 3C. 2

3 High temperature 200º C/2 hours, AUC/ARC & AUR/ARR 40º C Standard temperature for AUC/ARC & AUR/ARR. Figure 3A. Switch for AUC/ARC and AUR/ARR (used for standard operation) High temperature 300ºC/1 hour AUC/ARC & AUR/ARR Figure 3B. Terminal box for AUC/ARC and AUR/ARR (used for fire requirements: max 300 C for 60 minutes) Wiring diagram in motor terminal box Standard & High temperature AUO/ARO Ground screw Figure 3C. Switch for AUO/ARO (used for both standard and 300 C) Wiring diagram for figure 3C (connect ground wire to ground connection screw) 3

4 1 3 Access to terminals (AUO/ARO only) (figure 4) is obtained by removing screw in handle item 1 removing handle item 2 unscrewing screws in cover item 3 and removing cover item 4 Note: The switch

4 4 1 3 Access to terminals (AUO/ARO only) (figure 4) is obtained by removing screw in handle item 1 removing handle item 2 unscrewing screws in cover item 3 and removing cover item 4 Note: The switch can be used as safety isolator 2 Figure 4. Switch with ON/OFF (AUO/ARO) 6. Commissioning 6.1 Approval (Prior to start of operation) After installation of the jet 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 and kept by the person responsible for the operation of the system and must for jet fans approved for smoke control be produced whenever asked for. Prior to start of operation check that the fan is clean and free from tools and foreign substances and that the impeller rotate freely. Also ensure that the electric connections meet the national requirements, and that the wire guard on the suction side of the fan and guide vanes on the pressure side are correctly mounted. To check direction of airflow and direction of rotation switch on/off the motor. Please note that the motor may consume more power than stated on the motor plate during the first 30 minutes of the working time of the fan (running-in period). The amperage will depend on the temperature as well. 6.2 Starting procedure Start the fan. Check that no abnormal noises occur. After 30 minutes of operation check that the fan operates normally. ImportantThe fan is designed for continuous operation. The following kinds of operation may cause fatigue break in the impeller and endanger people. - Operation with pulsating counter pressure - called pump mode - Operation with repeated starting and stopping If in doubt Novenco should be contacted to assess the suitability of the fan. 7. Maintenance The user must keep the jet fans in a good and operational condition. In order to ensure the functionality and working life of the fans it is important to observe the following. 7.1 Maintenance of fans Fans for CO-ventilation It is recommended to inspect the fans once a year where the functionality is checked Fans approved for smoke control and used for ventilation on a daily basis must be inspected every six months. Fans only used in case of fire must be inspected four times a year. In any case it is important that the motor manufacturer s maintenance instructions are followed. 7.2 Protection prior to inspection and maintenance Prior to inspection the electric system must be disconnected and secured to prevent the cables to be energised and the fan is not cut in unintentionally. 7.3 Cleaning Clean fans and silencers according to requirement by means of pressurized air or vacuum cleaning. High-pressure water cleaning is not recommended. 7.4 Vibrations From the factory the fan is balanced to run without disturbing vibrations. Vibrations occurring during operation are normally an indication of accumulation of dust and dirt/foreign bodies on the rotor system. If ordinary cleaning does not solve the problem, expert assistance should be called in immediately as constant vibrations can damage both motor bearings and impeller. 4

5 Motor The motor is provided with sealed-forlife bearings which are to be replaced according to the motor manufacturer s instructions. 7.6 Dismounting of motor Prior to commencing the work, follow the procedure in section Figure 5. Dismounting/mounting of motor Procedure for dismounting: (see figure 1 and figure 5) 1 Disconnect supply cable to switch (figure 1, item 06) 2 Support jet fan, remove nuts on the four expansion bolts (figure 5, item 01) and lover the jet fan down from ceiling 3 Remove set screws item 02 (figure 5) and dismount silencers items 03 and 04 (figure 5), (mark locations of silencers so they are not mixed up later on) 4 Disconnect cable from terminal box to motor 5 For type AU-: remove hub cap of impeller figure 5, item 07 by removing screw item 05, and centre disc item 06. For type AR-: remove rivets (ø3.2 mm) ø4 mm for AR 500 in guide vane arrangement figure 5, item 12 and remove Dismount impeller figure 5, item 08 by means of a puller fastened in two threaded holes of hub boss (M8 16 with distance 50 mm) 7 Remove four set screws figure 5, item 09 8 Dismount motor item 11 and motor mounting flange item 10 Note: Mark location of motor prior to dismounting in order to ensure that it is remounted in same location. 7.7 Mounting of motor Procedure for mounting: (see figure 5) After servicing of motor according to motor manufacturer s instructions assemble fan in reverse order with special regard for the following. Grease all bolts/screws before use. 1) After servicing remount the motor item 11, see that the motor mounting flange item 10 is correctly located and that the motor shaft is concentrically placed in the fan casing (in centre of casing) before tightening the set screws item 09. 2) Mount the impeller item 08 on the motor shaft by means of a jack fastened in the threaded hole of the motor shaft. Press the impeller hub to contact against the motor shaft collar. Check that the blade clearance is the same throughout the circumference of the casing. If this is not the case, adjust the motor location in the suspension arrangement. Note: The use of a hammer or the like will damage the motor bearings. 3) Connect cable between motor and terminal box. Use same routing as from the factory 4) Mount hub cap item 07, centre screw item 05 and centre disc item 06 and tighten 5) For type AR-: Mount guide vane arrangement figure 5, item 12 by means of ten blind rivets ø (monel metal) (For size AR- 500 use ten blind rivets ø4 10 (monel metal) 6) Mount silencers items 03 and 04 to fan casing by means of set screws item 02 7) Lift up the fans into position and mount four expansion bolts item 01, nuts and tighten 8) Connect supply cable to the terminals. To start the fan, follow procedure described in section Blade pitch adjustment The blade pitch has been adjusted in the factory with a special tool (mounting fixture) to deliver the performance required. Do not change the blade pitch without previous agreement with Novenco. 7.9 Troubleshooting These are likely causes of break-downs/ failures. Deficiency in performance: Inlet or outlet side of fan is blocked Motor is defective Motor is cut out Electric connection is defective Direction of rotation is wrong Noise/vibrations: Bearings in electric motor are defective Impeller is out of balance Impeller is worn/damaged Loose screws/components Impeller blades have different pitch angles (loose blades) 5

6 Novenco A/S Industrivej 22 Tel Naestved Fax Denmark Fan operates in the stalling area. May result in break-down. Repair failures, see Deficiency in performance. 8. Periodic Inspection In order to secure an adequate functioning and a long life of the fan, the fan must be inspected according to 7.1 & The inspection consists of the following activities: Measuring of power consumption at full and half speed Vibration measuring on fan casing (outside motor) Check of fan suspension Visual inspection of the impeller, casing, silencers and electric connection Cleaning: Internal with compressed air/vacuum cleaning External with water provided that no water gets into electric systems or acoustic infill of the silencers It is recommended to keep a journal of all measured values and observations for each individual fan. 9. EC Declaration of Conformity Novenco A/S Industrivej 22 DK Naestved hereby declares that AUC/ARC/ AUR/ ARR/AUO/ARO meet the requirements of the directives below, on condition that the products are installed in accordance with the instructions included in the supply. Altering the products causes this declaration no longer to apply. Applied directives: EC Machinery Directive 98/38/EC EMC Directive 89/336/EC (amended by 92/31/EC and 93/ 68/EC) Low Voltage Directive 73/23/EC (amended by 93/68/EC) Applied standards: EN 292-1: Safety of machinery part 1 EN 292-2: Safety of machinery part 2 EN 292-2/A1: Safety of machinery part 2 EN 294: Safety of machinery Safety distances EN : Smoke and heat control systems - Part 3, class 1 EN : 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, Bjarne Sørensen Department Manager Novenco A/S 6

Installation and Maintenance Novax Smoke Exhaust Fan Type ACN Smoke

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