Rotary heat exchanger EURA, 20 53

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1 Rotary heat exchanger EURA, 0 5 Fig. Adjustment At a constant speed, check that the rotor is rotating in the right direction. The direction of rotation is indicated on the casing. If the purging sector requires adjustment, check the adjustment angle; see following page. Care Maintenance and service operations on the recovery unit concern essentially the rotor, seals and drive equipment. The recovery unit is accessible for service via the inspection doors. See Fig.. The rotor rolls out for service. The estimated service interval is 000 hours during a -month period for a normal comfort installation. Shorter intervals must be used in environments with a high dust content in the supply air and/or the exhaust air. Maintenance of the recovery unit is facilitated to a considerable degree by using the recommended equipment for supervision and forced air operation. Object Interval Procedure See page Rotor/front panels 6 months Test and clean, if necessary Rotor/bearing months Size 0 sealed-forlife bearings, check (noise) Size 50 5 lubricate via grease nipples check (noise) Forced air months Check function Drive belt 6 months Check tension, wear and replace Sealing, rotor screen/wall Care diagram Check wear months and slot. Fläkt Woods 67 GB 0.0 Specifications are subject to alteration without notice

2 Rotary heat exchanger EURA, 0 5 Rotor Front panels Check that the surface of the rotor is not coated with dust. Clean with a vacuum cleaner or by blowing with compressed air. Blowing must take place from the clean side towards the dusty side. Where cleaning of the rotor surface by vacuum cleaning or blowing with compressed air is unsuitable (greasy dust), clean as follows: Spray a grease solvent, e.g. cold degreasing agent ULCZ-0, by hand onto the dusty surface of the rotor, followed by forced air cleaning from the other side with compressed air. Fig. p p Exhaust air Supply air Important Methyl ethyl ketone, acetone or corrosive substances must not be used. Alternatively, cleaning with low-pressure steam or water may be performed, where permissible, bearing in mind the possibility of water collecting. When cleaning with a high-pressure lance, the jet must be directed at right angles to the structure. The nozzle should preferably be held about 50 mm from the surface of the rotor. An appropriate pressure is up to 80 bar. Bearings Sizes 0 have sealed-for-life bearings and require no maintenance. Check that the bearing noise is normal. Sizes 50 5 have bearings fitted with grease nipples for lubrication. The normal lubrication interval ( months) and the recommended grease (MOLUB ALLOY 787, 0 g) are also stated on the inside of the inspection door. The grease nipples, one for each rotor bearing, are located on the top of the shaft mounting. See page 5 for replacement of rotor bearings. Adjustment of purging sector The forced air cleaning sector is positioned in the exhaust air flow where the rotor rotates from the exhaust air channel into the supply air channel. The sector is adjustable from 0 6 and is set to 0 on delivery. When minimum leakage of exhaust air into the supply air is required, the forced air cleaning sector must be set in accordance with the pressure ratio p p of the system; see the Table and Figs. and. The pressures can be read at measurement nipples on the frame; see Fig.. Fig. Scale Adjuster screw Purging sector Pressure difference over sector p p, Pa Adjustment angle of forced air cleaning sector, Standard wave division *) Coarser wave division **) *) EURA (b = ) **) EURA (b = ) Fläkt Woods 67 GB 0.0 Specifications are subject to alteration without notice

3 Rotary heat exchanger EURA, 0 5 Drive belt replacement The belt can be replaced with a pre-welded belt or, more simply, with a belt welded in situ; see separate instruction Joint welding equipment EURA-99-. Pre-welded belt replacement Belt replacement requires access to the two upper unit connections of the rotor to allow the rotor attachments to be released. Two alternative methods can be used: A. Roll out the rotor on its shaft through the inspection opening. A free inspection space L = half the diameter of the rotor + 00 mm is required in this case; or B. Raise the rotor inside the casing. Fig. 5 A. Remove the inspection doors by pushing out the hinge pins. Dismantle the central rail () between the inspection doors and the transverse sealing plate (). See Fig... Remove the drive belt from the motor belt pulley, and lift out the motor and the motor shelf after unscrewing the retaining screws for the motor shelf. See Fig. 5.. (Size 0 ; Fig. 6). Slacken the three screws () in the rotor brackets () slightly and lower the rotor with the help of the two set-screws (). Then remove these screws and the screw () located in front of the rotor bracket. NOTE. Do not slacken the screw (5) located behind the rotor bracket. (Size 50 5; Fig. 7). Slacken the four screws () in the rotor brackets () slightly and lower the rotor with the help of the two set-screws (). Then remove the screws ().. Dismantle the screw () for the forced air cleaning sector () and its bracket () and screws (). See Fig. 8). 5. The rotor can now be rolled out on the central rail, and the new belt can be passed over the rotor. 6. Roll the rotor back into place are refit the remaining 7. Using the set-screws (Item in Figs. 6 and 7), adjust the slot seal to about 8 mm uniformly around the periphery of the rotor (Fig. ) and tighten the screws ( and ; Figs. 6 and 7). 8. Size Force 0 g of Molub Alloy 787 into each Fig. 6 Fig. 7 Size 0 5 Size 50 5 Fig. Fig. 8 Fläkt Woods 67 GB 0.0 Specifications are subject to alteration without notice

4 Rotary heat exchanger EURA, 0 5 Pre-welded belt replacement (contd.) B. Remove the inspection doors by pushing out the hinge pins. Dismantle the central rail () between the inspection doors and the transverse sealing plate (). See Fig. 9.. Remove the drive belt from the motor belt pulley, and lift out the motor and the motor shelf after unscrewing the retaining screws for the motor shelf. See Fig. 0.. (Size 0 ; Fig. ). Slacken the three screws () in the rotor brackets () slightly and lower the rotor with the help of the two set-screws (). Then remove these screws and the screw () located in front of the rotor bracket. NOTE. Do not slacken the screw (5) located behind the rotor bracket. (Size 50 5; Fig. ). Slacken the four screws () in the rotor brackets () slightly and lower the rotor with the help of the two set-screws (). Then remove the screws ().. The rotor can now be lifted inside the casing by blocking it up and lifting it, for example with a crow bar. See Fig.. The belt can now be passed over the rotor. 5. Lower the rotor back into place and refit the remaining For replacement of a belt welded in situ; see separate instruction Joint welding equipment EURA Using the set-screws (Item in Figs. and ), adjust the slot seal to about 8 mm uniformly around the periphery of the rotor (Fig. ) and tighten the screws ( and ; Figs. 6 and 7). 7. Size Force 0 g of Molub Alloy 787 into each Fig. 0 Fig. Size 0 5 Size 50 5 Fig. Fig. Fig. 9 Fläkt Woods 67 GB 0.0 Specifications are subject to alteration without notice

5 Rotary heat exchanger EURA, 0 5 Replacement of rotor bearings Rotor bearings replacement requires access to the two upper unit connections of the rotor to allow the rotor attachments to be released. Two alternative methods can be used: A. Roll out the rotor on its shaft through the inspection opening. A free inspection space L = half the diameter of the rotor + 00 mm is required in this case; or B. Raise the rotor inside the casing. A. Remove the inspection doors by pushing out the hinge pins. Dismantle the central rail () between the inspection doors and the transverse sealing plate (). See Fig... Remove the drive belt from the motor belt pulley, and lift out the motor and the motor shelf after unscrewing the retaining screws for the motor shelf. See Fig. 5.. (Size 0 ; Fig. 6). Slacken the three screws () in the rotor brackets () slightly and lower the rotor with the help of the two set-screws (). Then remove these screws and the screw () located in front of the rotor bracket. NOTE. Do not slacken the screw (5) located behind the rotor bracket. (Size 50 5; Fig. 7). Slacken the four screws () in the rotor brackets () slightly and lower the rotor with the help of the two set-screws (). Then remove the screws ().. Dismantle the screw () for the forced air cleaning sector () and its bracket () and screws (). See Fig. 8). 5. The rotor can now be rolled out using the rotor brackets as wheels. Block up the rotor so that it is not damaged. 6. Remove the centre screw (Fig. 0) in one of the rotor bushes and withdraw the shaft in the other direction. 7. For size 50-5, the sealing rings must also be removed and replaced if any damage is present. See Fig The old bearings can now be tapped out through the shaft bore or removed with a puller. See Fig.. Clean any old grease from the bearing seats and the inside of the bearing housing and fit new bearings. NOTE. Replace both the inner and outer sealing rings. See Fig Roll the rotor back into place are refit the remaining 0. Using the set-screws (Item in Fig. 6, 7), adjust the slot seal to about 8 mm uniformly around the periphery of the rotor (Fig. ) and tighten the screws ( and ; Figs. 6 and 7).. Size Force 0 g of Molub Alloy 787 into each Fig. 5 Fig. 6 Fig. 7 Size 0 5 Size 50 5 Fig. Fig. 8 Fläkt Woods 67 GB Specifications are subject to alteration without notice

6 Rotary heat exchanger EURA, 0 5 Replacement of rotor bearings (continued) Outer sealing ring (Size 50 5) B. Remove the inspection doors by pushing out the hinge pins. Dismantle the central rail () between the inspection doors and the transverse sealing plate (). See Fig... Remove the drive belt from the motor belt pulley, and lift out the motor and the motor shelf after unscrewing the retaining screws for the motor shelf. See Fig. 5.. (Size 0 ; Fig. 6). Slacken the three screws () in the rotor brackets () slightly and lower the rotor with the help of the two set-screws (). Then remove these screws and the screw () located in front of the rotor bracket. NOTE. Do not slacken the screw (5) located behind the rotor bracket. (Size 50 5; Fig. 7). Slacken the four screws () in the rotor brackets () slightly and lower the rotor with the help of the two set-screws (). Then remove the screws ().. The rotor can now be lifted inside the casing by blocking it up and lifting it, for example with a crow bar. See Fig. 9. The belt can now be passed over the rotor. 5. Remove the centre screw (Fig. 0) in one of the rotor bracket and withdraw the shaft in the other direction. 6. For size 50 5, the sealing rings must also be removed and replaced if any damage is present. See Fig The old bearings can now be tapped out through the shaft bore or removed with a puller. See Fig.. Clean any old grease from the bearing seats and the inside of the bearing housing and fit new bearings. NOTE. Replace both the inner and outer sealing rings. See Fig Lower the rotor back into place and refit the remaining 9. Using the set-screws (Item in Fig. 7), adjust the slot seal to about 8 mm uniformly around the periphery of the rotor (Fig. ) and tighten the screws ( and ; Figs. 6 and 7). 0. Size Force 0 g of Molub Alloy 787 into each Centre screw Fig. 0 Fig. Bearing Inner sealing ring (Size 50 5) Screen wall Brush strip Slot ca 8 mm Fig. Fig. 9 Fläkt Woods 67 GB Specifications are subject to alteration without notice

ECONOVENT PUM Installation and maintenance instructions for rotary heat exchangers

Plant: Heat exchanger designation: ECONOVENT PUM Installation and maintenance instructions for rotary heat exchangers Contents Design, Condition on delivery........................................3 Handling,