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Table of Contents
Related Manuals for Alcons LR28
Summary of Contents for Alcons LR28
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Page 2: Table Of Contents
_________________________________________________________________________________ 14 GRD28 hoist options ________________________________________________________________________________ 15 GRD28B hoist options Fly mode array assembling and hoisting ____________________________________________________________________________________ Compression style array assembling and hoisting ____________________________________________________________________________ Service and support ______________________________________________________________________________ 23 CE declaration of conformity _______________________________________________________________________ 25 Rigging manual LR28 Rev. 1.45... -
Page 3: Introduction
The trapezoidal cabinet is fitted with integrated mounting hardware, enabling angle-setting on the cabinets, without lifting the array, resulting in safer and faster set-up with minimal handling. The rigging system supports different modes of array assembling and has a working load limit of 24x LR28, 32x LB28 or 16x LR28B cabinets under 10:1 safety. -
Page 4: Important Safety Instructions And Precautions
Do not stack the loudspeaker array on unstable ground or surface. If the array is stacked on a structure, platform, or stage, always check that the latter can support the total weight of the array. As a general rule, Alcons Audio recommends the use of safety straps at all times. -
Page 5: Installation
Unpacking Carefully open the shipping carton and inspect all the parts. Every Alcons product is thoroughly tested and inspected before leaving the factory and should arrive in perfect condition. If you find any damage, notify the shipping company immediately. Only you, the consignee, may initiate a claim for shipping damage. Be sure to save all packing materials for the carrier’s inspection. -
Page 6: Rigging Components
4) Pin pre-rig transport Pin holding the cabinet at 0° on the PRRGL28 5) Signal input/ link Input/ link for the audio signal 6) Angle frame This frame holds features for the angle setting and back coupling 7) Pin slider Black color indicates LR28/80°, green LR28/110° Rigging manual LR28 Rev. 1.45... - Page 7 1) LR28B cabinet LR28B cabinet 2) Coupler Rotatable couplers, lockable with quick release pin 3) Bar handles Handles in the cabinet ensure easy handling 4) Bottom connector Connection with two holes, enabling a 2,5° splay angle Rigging manual LR28 Rev. 1.45...
- Page 8 CNVB1828 This bracket is a transition frame to suspend a small LR18 array under a LR28 for down fill applications. It enables a maximum tilt angle of 8° between LR28 and LR18. CNVB1828 is certified for six (6) cabinets LR18.
- Page 9 4. Rigging components __________________________________________ PRRGL28 This wheeled Pre-rig frame is used to transport 4 LR28 or LB28 cabinets. It can also be used as a ground stack base, with optional adjustable SWFTPRRGL28 feet . It has a 0° or 6° angle arm. The frames can be stored on top of each other, using the wheel recesses.
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Page 10: Array Configurations
The angle lay-out is pictured below. The “P” indicates the position of the angle pin, when parking the angle arm. This is done in case of single LR28 cabinet transportation. The general rigging guidelines on the right is also shown at the back of the cabinet. - Page 11 Speakon connectors cannot take the entire cable weight. A second GRD28B, under an LR28B (to enable the connection to an LR28 or LR24 array) is connected with its top rotatable couplers to the 0° holes on the LR28B cabinet.
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Page 12: Grd28 Options
Use 3,25T shackles in any situation. The A1 & A6/ A7 marked points are the default hoist points. It is also possible to use one pick point from the A5 pattern. Use it only for max. 12x LR28 cabinets. -
Page 13: Grd28B Options
The grid is used on LR28B in the shown orientation. The A1 & A2 marked points are the default hoist points. L1 marks the front connection points to a LR28 cabinet. L2 are the LR24 connection points. In both situations, the GRD28B needs to be 180° turned... -
Page 14: Grd28 Hoist Options
The schematic picture below shows the possible array hang options A-D in fly mode and stack arrangement E&F As stated earlier, the array angles can be determined through the Alcons Ribbon Calculator™ simulation program. The Centre of Gravity needs to be between the outermost pickpoints at all times! When stacking (E&F), ensure that the centre of gravity is well within the PRRGL28/ GRD28 support points. -
Page 15: Grd28B Hoist Options
Note the chain setup on the back of the array, when flying LR28/ LR24 in compression mode. Attaching LR28/ LR24 to LR28B (flying or stacking) requires a second GRD28B (o). This is due to the fact that the LR28/ LR24 have 3 pick points and LR28B is a 4 pick points set-up. -
Page 16: Fly Mode Array Assembling And Hoisting
Fly mode array assembling and hoisting Using this mode the LR28 rigging system uses the vertical PRRGL28 pre-rig transporter combined with (non-compression) vertical fly array hanging. This mode uses the top “fly slot” in the angle arm and is best suitable for large 12->24 pcs arrays The schematic drawing shows the building steps G->L with 2 chain hoists. - Page 17 This flying option uses the PRRGL28 pre-rig transport option. The PRRGL28 (E) transports 4x LR28 or LB28 cabinets in a vertical position. Take off the protective SFTCVR4LR28 Start with the first 4 cabinets. (G). This is a two man job Hold each cabinet and remove the angle pin (6) and red buttoned pin (12).
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Page 18: Compression Style Array Assembling And Hoisting
Use an extra safety chain in combination with the lever hoist. It is not allowed to use a motor hoist. Take the PRRGL28 (E) off when the first 4 piece LR28 array is suspended. This is a two man job. - Page 19 After the compression stage, the angle of the entire array can now be adjusted. Use an angle inclinometer on the GRD28. The following schematic drawing shows the three hoisting stages with a 4 pcs array. 1) After array building 2) Compression to reach the desired angles 3) Array angling Rigging manual LR28 Rev. 1.45...
- Page 20 5 (pattern A5) in the centre of gravity. The second hoist chain has to be attached to the WLFRML28 (C). In this way, the angles can be set using compression and the entire array can be angled. 4) After array building 5) Compression to reach the desired angles 6) Array angling Rigging manual LR28 Rev. 1.45...
- Page 21 Put the red buttoned pins (12) into the angle arms of the first 4 piece array. Land the PRRGL28 and detach the (front and back) cabinet connection pins above the top no. 4 cabinet on the PRRGL28 and put them into their transport recesses . Continue this procedure. Use the optional SFTCVR4LR28 to protect the PRRGL28 for transport and storage. Rigging manual LR28 Rev. 1.45...
- Page 22 5. Array configurations ___________________________________________ Using CNVB1828 Attach the CNVB1828 frame to the LR28 front couplers (2) and bottom connection pin (7). Make the angle adjustments on the LR18 modules. Lower the LR28 array onto the top LR18 module on the Pre rig. You can, of course, also mount individual LR18 modules to the LR24 array.
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Page 23: Service And Support
Summary Alcons Audio BV warrants the original purchaser and any subsequent owner of each new Alcons product, for a period of six years limited from the date of the original purchase by the original purchaser that the new Alcons product is free of defects in materials and workmanship. Alcons Audio BV warrants the new Alcons product regardless of the reason for failure, except as excluded in this warranty. - Page 24 6. Service and support ___________________________________________ Contact information Mailing address: Alcons Audio BV De Corantijn 69 1689 AN ZWAAG The Netherlands Telephone +31 (0)229 283090 World Wide Web: http://www.alconsaudio.com E-mail: info@alconsaudio.com Rigging manual LR28 Rev. 1.45...
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Page 25: Ce Declaration Of Conformity
National standards and technical specifications applied: DIN EN ISO 12 100, DIN EN 1050, BGV C1 provided the mounting components are unaltered/modified and in “factory-original” condition. Established at Zwaag, the Netherlands, December 15th, 2021 T.H. Back Managing Director Rigging manual LR28 Rev. 1.45... - Page 26 Notes _________________________________________________________ Rigging manual LR28 Rev. 1.45...
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