HT SERIES SMOKE VENTING EQUIPMENT

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1 FIRE SAFETY AIR MOVEMENT HT SERIES SMOKE VENTING EQUIPMENT HT200 C OR HIGHER FOR 2 HOURS» SAFETY, INSTALLATION AND MAINTENANCE INSTRUCTIONS PART NO

2 CONTENTS GENERAL SAFETY WARNING PARAGRAPHS 1 INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS 2 SITE STORAGE, SUPPLY, INSTALLATION 3 OPERATING CONDITIONS 4 CONNECTION 5 CABLE 6 CONTROL 7 MAINTENANCE 8 LUBRICATION 9 TESTING (FANS AND CONTROLS) 10 LONG TERM RELIABILITY 11

3 1. SAFETY HT Series Smoke Venting Equipment FANS FOR EMERGENCY OPERATION AT HIGH AMBIENTS FOR A LIMITED PERIOD This product contains rotating parts and electrical connections which can be a danger and cause injury. It is of paramount importance for any fan that is required to function in emergency conditions, that the installer and user must follow all relevant instructions in this leaflet, as well as those contained in the general Instruction Leaflet supplied with this product. To ensure that fans will operate continuously during a high air temperature emergency, the electrical system must have been designed and installed to accommodate the specific emergency conditions of temperature and duration. A maintenance procedure must be put in place and a record of the activities that have been performed must be kept. 2. INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS These instructions apply to all axial fans, including Aerofoils, Bifurcated Fans and UDA Roof Units. They must be read in conjunction with those in the standard Instruction Leaflet for these fans:- Aerofoil Fans:- Pt. No SITE STORAGE, SUPPLY, INSTALLATION Refer to the above instruction leaflet. When fans are retained in storage, access by un-authorised persons must be prevented with the use of guards, barriers or secure premises to ensure that fan impellers which may be rotating do not present a hazard. For 600 C Bifurcated fans in fully-immersed conditions please enquire for specific installation instructions. 4. OPERATING CONDITIONS Under emergency conditions, these fans are suitable for the temperature/time capability given on the name plate or in the accompanying documentation. e.g. HT300/1 is suitable for a single use at 300 C for 1 hour. Bifurcated fans can operate up to 600 C for 2 hours provided that the air temperature at entry to the motor compartment does not exceed 50 C. When an emergency air temperature above 400 C has to be allowed for, it will be necessary to provide means of ducting heated air from the motor compartment to a safe location and to supply cooling air to the motor, at less than 50 C. Unless otherwise stated fans are suitable for continuous operation, prior to the emergency, in ambient temperatures of -40 to +40 C. They are only suitable for start-up between -20 to +40 C (Roof Units can be used up to +50 C). On the fan nameplate, the maximum temperature may be shown as +40 C but when installed for emergency use, the temperature/time capability will be as shown on the special label adjacent to the main nameplate. 5. CONNECTION The wiring to the fan must be in accordance with the connection diagram in the terminal box. Fans are designed primarily for 3 phase electrical supply but some smaller fans are available for 1 phase supply. Where 1 phase fans are to be installed, the capacitor must be mounted well outside the potential high temperature area. On commissioning, the rotation of the impeller should always be checked. 6. CABLE Suitable fire-resistant cable should be used between the main supply, starter controls and the fan. The mains supply should be from a guaranteed or separately maintained source, to enable the fan to continue running under emergency conditions. Duct-mounted terminal boxes for all HT fan specifications are designed to accommodate MICC supply cables. 1

Soft-start of HT fans and speed control of fans during day-to-day mode is permitted using non-approved drives so long as the drive is by-passed from the circuit once up to full speed.

4 7. CONTROL High Temperature rated fans must be run Direct-on-Line during their emergency [high temperature] operation. Operating the fan at 100% speed through an inverter Fire Mode is not permitted except for Fläkt Woods approved drives and fan/drive combinations. Soft-start of HT fans and speed control of fans during day-to-day mode is permitted using non-approved drives so long as the drive is by-passed from the circuit once up to full speed. Drives must not be located in the same fire compartment as the extract fans unless suitably protected and provided with cooling air. Drives must be connected to the fans using appropriate HT cable for the application. Over-heat protection, Vibration sensors, Bearing sensors and inverter motor over-heat protection circuits must be disabled during emergency mode if provided. 8. MAINTENANCE For normal operation and planned preventative maintenance please refer to document AT 3 MONTHLY INTERVALS WHEN FANS ARE NOT NORMALLY RUN If the fan is intended for emergency use only, the resistance of the windings to earth should be measured (at 500v dc). If the resistance is found to be less than 10 megohms, the motor should be dried out and re-checked. Run the motor for at least 15 minutes to prevent hardening of the grease and corrosion of the bearing. AT 6 MONTHLY INTERVALS On bifurcated fans only; remove the impeller and check the condition of the shaft packing seal located behind the shaft seal retaining plate. Replace the packing seal (Part No ) if necessary. 9.LUBRICATION PT It is necessary to record the number of hours the motor has operated in order to determine when bearing relubrication is required. If the motor is not running continuously, the date of installation must be recorded, since relubrication is recommended every six months, even if the motor was not run during this time. Beware of all rotating parts! Grease can cause skin and eye irritation when regreasing. Follow all safety precautions specified by the grease manufacturer. SHIELDED/SEALED BEARINGS Small motors (frame ) which are fitted with sealed for life ZZ/2Z bearings, greased for life must be replaced after 20,000 running hours. Check motor nameplate for determining the bearing type used. MACHINES FITTED WITH GREASE NIPPLES Motor grease nipples are usually fitted to 160 frame motors and above. Regular maintenance and adherence to re-greasing procedures will prolong bearing life. Failure to do this may shorten bearing life considerably. Maintenance includes: a) Attention to the overall bearing status; b) Cleaning and lubrication; c) Detailed inspection of the bearings. Although a well tuned ear can often distinguish unusual noises, more sophisticated equipment should be used to obtain a quantified bearing analysis. 2

For this reason, lubricants must be renewed or replenished from time to time. LUBRICATIONS INTERVALS NOTE! Bearings with grease nipples facilities must be replaced after 40,000 running hours.

5 Bearings should be lubricated to avoid metallic contact of the moving parts, and also for protection against corrosion and wear. Lubricant properties deteriorate in the course of time due to mechanical operation, furthermore, all lubricants are subject to contamination under working conditions. For this reason, lubricants must be renewed or replenished from time to time. LUBRICATIONS INTERVALS NOTE! Bearings with grease nipples facilities must be replaced after 40,000 running hours. If Krytox GPL226 grease is supplied, it may cause higher noise levels particularly at low temperatures, or when intermittent duty does not allow a running temperature above 20 C in the bearing. Please contact Fläkt Woods if the service temperature is below -5 C. Type of grease, lubrication intervals, amount of grease and type of bearing and clearance are indicated on the motor nameplate. Lubrication intervals depend on motor size, speed, working conditions, type of grease used and ambient temperatutre. NOTE! If the supplied motor was intended for horizontal operation, but is operated in a vertical position, the lubrication intervals should be reduced by half. QUALITY AND AMOUNT OF GREASE Correct lubrication is important for proper bearing operation, i. e., grease must be applied correctly and in sufficient amount. A lack of grease or excessive greasing may cause bearing damage. It is recommended to measure the weight of one shot of grease, in order to determine the number required to match the quantity on the motor nameplate. Excessive greasing causes overheating due to high resistance caused by the rotating parts and, in particular, by the lubricant compacting and losing its lubricating characteristic. Excess of grease may cause leakage and motor winding contamination. Lack of greasing causes overheating due to high friction between the rolling elements and the outer ring and inner race, which result in premature bearing failure. GREASE COMPATIBILITY Incompatibility between different grease types can cause problems. Never mix greases of different bases. Example: lithium-based grease should never be mixed with sodium or calcium-based grease. To avoid any eventual grease incompatibility, always regrease bearings with the grease type indicated on the motor nameplate. As a general rule, greases with the same specification are compatible, however this is dependant on the formula. Before mixing grease types, therefore, please consult the grease supplier. DRIVE END AND NON-DRIVE END BEARING RELUBRICATION STEPS 1. Before lubricating the bearing, clean the area around the grease nipples with clean cotton cloth; 2. With the motor running, add the amount of grease indicated on the bearing nameplate; 3. Leave the motor running for sufficient time to spread the grease on the bearing; 4. Check bearing temperature to make sure there is no significant variation. NOTE! On first start or after a bearing re-lubrication there may be a slight temperature rise for the initial hours. 3

6 If the motor can not be lubricated while it is running, lubrication can be carried out while a machine is at a standstill, proceeding as below: 1. Inject about half amount of required grease, and run the motor at full speed for 5 minutes; 2. Switch off the motor and inject the remaining grease; 3. Start the motor again to spread the grease internally. The bearing life is estimated by calculations according to ISO 281: to give a L10 life. Beyond each periodical maintenance, our recommended bearing condition check frequency is at each lubrication. Depending on the results, bearing may need replacing. The lubrication intervals are based on a bearing operating temperature of 75 C (frames 63 to 200) and 85 C (frames 225 to 500). Some designs may vary. An increase of the ambient temperature raises the bearing temperature correspondingly. For each 15 C of temperature rise, the relubrication period should be halved. 160 frame motors mounted inside fan ducts, and with grease nipples, should have external grease nipples mounted on the exterior of the duct with a nameplate affixed advising the type, quantity and re-lubrication interval of the grease. MOTORS WITHOUT LUBRICATORS Motor frame sizes less than 132 or motors not fitted with lubricators operating in ambient temperatures up to 50 C; the motor should be dismantled, shaft seals and bearings replaced and relubricated after 20,000 hours running, or 3 years, whichever is the shorter, (10,000 hours where motor speed exceeds 1800 rpm). To relubricate motors in airstream above 300 C, the special grease used has a very low fill requirement and these fans, therefore, do not have relubrication facilities. The old grease should be washed out with its designated solvent. The bearings should be refilled with grease leaving the housing empty. If a bearing is removed from the rotor, it should be discarded and a new one fitted, using the approved grease. 10. TESTING (FANS AND CONTROLS) It is recommended that the system is tested for emergency operation every 6 months. This test should review all elements of the system [fans, controls, dampers etc] for correct operation. Note: Fans should only be run for short periods as no thermal overloads are in circuit for emergency condition. 11. LONG TERM RELIABILITY Consideration should be given by the responsible Engineer, to a major refit after operation for 50,000 hours. This would involve rewinding with materials of equivalent thermal endurance and replacement of bearings. Guidance on the time span prior to re-fit can be given by Fläkt Woods Limited on receipt of full operational information, duty cycle, HT category, and other nameplate data. To maintain CE marking of High Temperature Fans; motor rewinds must be conducted by Fläkt Woods. THIS LEAFLET SHOULD BE PASSED TO THE USER TO ENABLE THE FAN TO BE MAINTAINED IN A SAFE CONDITION. 4

7 PN : H.T Series Smoke Venting Equipment Installation Guide Copyright 2014 Fläkt Woods Group WE BRING BETTER AIR TO LIFE With over a century of innovation and expertise to share with our customers, Fläkt Woods is a global leader in Air Technology products and solutions. We specialize in the design and manufacturing of a wide range of products and solutions for Air Movement, Air Treatment, Air Distribution, Air Management and Air Diffusion with focus on two major benefits Air Comfort and Fire Safety. With market presence in 65 countries we are in a unique position to be a local supplier and an international partner in our customer s projects. Our product brands such as SEMCO, eq, eq Prime, JM Aerofoil, Econet, Veloduct, Optivent, Optimix, Econovent and Cleanvent are well-known and trusted by customers all over the world to deliver high quality and energy efficient solutions.» To learn more about our offering and get in contact with your nearest sales representative please visit

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