SERIES ARH INSTALLATION AND OPERATION INSTRUCTIONS FOR THE HORIZONTAL AUTOROLL & MANUROLL

Transcription

1 TECHNICAL DATA AUTO-LINE TM SERIES ARH FEBRUARY 2004 AUTOMATIC AIR FILTRATION EQUIPMENT AUTO-LINE TM SERIES ARH INSTALLATION AND OPERATION INSTRUCTIONS FOR THE HORIZONTAL AUTOROLL & MANUROLL INSTALLATION AND OPERATION INSTRUCTIONS for BLC s HORIZONTAL AUTOROLL, MANUROLL AND ROOF-TOP ROLL MACHINES ORDER NUMBER: SERIAL NUMBER:! INSTALLATION INSTRUCTIONS (2-7)! OPERATIONS ADJUSTMENTS CHECKLIST (8) (8)! DIFFERENTIAL PRESSURE SWITCH (9)! CORE & TRUNNION - INSTALLATION (10)! ROLL MEDIA - INSTALLATION (11)! PARTS - LIST & IDENTIFICATION (12-14) BLC Industries, Inc. P.O. Box 14187, askus@blcind.com Louisville, Kentucky Phone: (502) Fax: (502) BLC-WEST Phone: (480) Fax: (480) We reserve the right to make changes in product design and product specifications without prior notice or obligation. Breathe Easy, We Have The Line On Air Filtration.

2 INSTALLATION INSTRUCTIONS for BLC INDUSTRIES, INC. HORIZONTAL AUTOROLLS, MANUROLLS AND ROOF-TOP ROLL MACHINES I. EQUIPMENT IDENTIFICATION A. Locate and identify all crates and cartons. All units are shipped with an initial supply of roll media: either BLC-type SRM media or BLC-type GRM media. Spare roll(s) of roll media can also be shipped at the same time, if required. BLC-type SRM Roll Media. BLC-type GRM Roll Media.! ARH Units with INSIDE DRIVE: Drive and controls are factory mounted with manual jog switch and media run-out signal light assemblies shipped in the accessory carton.! ARH Units with OUTSIDE DRIVE: Drive and controls are shipped in a separate carton. Pressure switch (if required), jog switch and media run-out signal light assemblies are mounted on control box. With the INSIDE DRIVE, the 1/9 HP Motor is factory mounted and located inside of the air stream

3 ! PRESSURE CONTROL ARH UNITS: This control system has the differential pressure switch factory installed and preset to operate at 0.50 W.G. The accessory kit with static tips and connection tubing is shipped in the accessory carton to be installed by customer. CHECKLIST ARH (or MRH) --- SECTION or SECTIONS. ROLL MEDIA and SPARES. DRIVE and CONTROLS (Mounted, not mounted). PRESSURE SWITCH (If required). ARH (or MRH) --- ACCESSORY PACKAGE (Containing: Trunnions, jog switch, media run-out signal light, pressure switch accessory kit or other loose parts required to complete installation). B. Once all crates and cartons are located and identified, store in a dry and clean area until equipment is needed. C. Identify unit section or sections and system markings. These will be located on the door panel (or on the compression panel for Roof-Top Roll Machines), at the clean roll end of each unit section. Once identified, move Horizontal Unit section(s) to the proper system. D. Once the unit is located at the proper system, uncrate and dispose of all packing materials, except blocks that hold the compression panel off the media run-out switch(s). Leave these in place until roll media is loaded into Horizontal Unit. See Part VI. E. Unit section(s) must sit on a solid, level foundation that will provide for a level and plumb installation when bolted in place. Recommended service area is 36 inches minimum, each end of Horizontal Roll Machine. II. INSTALLATION OF FILTER SECTIONS A. For Horizontal AUTOMATIC Roll Machines (Horizontal AutoRolls), refer to AUTO-LINE TM Series ARH Submittal Data sheet located in the instruction packet to find details about type and size of roll media, section quantity, drive system, controls and unit options. For Horizontal AUTOMATIC ROOF-TOP Roll Machines, refer to the special Submittal Data sheet provided by BLC for details. That sheet is located in the instruction packet. For Horizontal MANUAL Roll Machines, refer to AUTO-LINE TM Series MRH Submittal Data sheet located in the instruction packet to find details about type and size of roll media, section quantity, manual system and unit options

4 B. Install Horizontal unit section(s) as shown on the appropriate Submittal Data sheet. On the door panel (or on the compression panel for Roof-Top Roll Machines), at clean roll end of Horizontal Section, you will find section markings and the direction of air flow label. Very important: Make sure the unit section(s) is oriented in the proper direction. C. Once the Horizontal unit section(s) is set into place, level and plumb, the section(s) may now be secured to the ductwork. A 3/4 inch flange is provided upstream and downstream on the Horizontal section side panel for that purpose. If more than one (1) section is used, filter sections should be secured to each other. After the Horizontal sections(s) is in place, all joints should be caulked to prevent dirty air bypass. III. DRIVE INSTALLATION A. For Horizontal AUTOMATIC Roll Machines (Horizontal AutoRolls) with an INSIDE DRIVE, the drive mechanism is factory installed. No field mounting of the drive is required. B. For Horizontal AUTOMATIC Roll Machines (Horizontal AutoRolls) with an OUTSIDE DRIVE, field mounting of the drive is required. Refer to ARH Submittal Data sheet for drive location. Drive mechanism must be bolted to mounting brackets located on media housing panel by using four (4) bolts (5/16-18 x 1), lockwashers (5/16) and flat washers (5/16) supplied. Slotted holes are provided for proper alignment of drive shaft to drive core. C. For Horizontal MANUAL Roll Machines with wheel advance or hand crank, no drive installation is required. Manual units that are chain and sprocket driven require installation of the crank handle to the pillow block shaft. A coupling is provided for handle installation. IV. DRIVE CORE & TRUNNION INSTALLATION A. An empty roll media take-up core is supplied with each section, installed at the take-up end of each ARH (or MRH) section. B. For trunnion installation on the Horizontal AUTOMATIC Roll Machines (ARH), refer to page 10 of this Technical Data document. Trunnions are located in the accessory package. Take-up core(s) must be removed to install trunnions. Refer to page 11 for core removal. Install trunnions and replace core(s). Empty Take-Up Roll Core C. If Horizontal AUTOMATIC Roll Machines (ARH) are more than one (1) section, a trunnion and coupling trunnion must be installed to drive filter slave section. (Sections II and IV of larger units.) Refer to page 10 of this Technical Data document for installation. D. For Horizontal MANUAL Roll Machines (MRH), drive core and trunnion installation differs according to type of manual drive:! MRH Wheel Turn Units require no trunnion installation. Roll media is advanced by turning of the take-up core end plates

5 ! MRH Hand Crank Units require trunnions only with more than one (1) section. There must be a trunnion and coupling trunnion between drive (Section I) and slave (Section II). If required, these parts will be located in the accessory package. Roll media is advanced by inserting a hand crank into the take-up core on the drive section of the unit and turning. The hand crank is shipped in the accessory package. Refer to page 11 of this Technical Data document for core removal and to page 10 for trunnion installation.! MRH Chain and Sprocket Driven Units require trunnion installation. There must be a trunnion in the sprocket end of the take-up core. Roll media is advanced by cranking of handle. If there is more than one (1) section, a trunnion and coupling trunnion are required as in the Hand Crank units (see above). V. ELECTRICAL INSTALLATION A. ARH units having a PRESSURE SWITCH (prewired to control box) will require installation of static pressure tips and tubing provided in pressure switch accessory kit. See page 9. B. For TIMER CONTROL UNITS, the timer becomes operational once power has been applied. The timer is controlled by the metering switch and cam located on the idler roller at the take-up end of Section I. The amount of media indexed into the air stream may be set by the timer dial located inside the control box. Settings can be at any point from 2 1/2 inches to 120 inches in a 24 hour period, depending on dirt loading conditions. The timer should be used in conjunction with a manometer to ensure that the pressure drop through the media is maintained at 0.50 W.G. CAUTION Prior to any electrical work, ensure that power supply is turned off and locked out. All work should be done by a qualified electrician. C. FOR ARH --- INSIDE DRIVE 1. Refer to wiring diagram in installation packet for wiring schematic. 2. Power lines, manual jog switch and media run-out signal light must be wired into main control box mounted to unit. (Jog switch and media run-out signal light are shipped in accessory carton.) 3. If ARH unit with inside drive is more than one (1) section high, the run-out switch of Section II must be connected. Pin and socket connectors are provided for this purpose. Plug into appropriate receptacle of control box labeled for Horizontal AutoRoll Section II. 4. If ARH unit has a second motor, conduit and wiring (tagged for connections) are supplied to main control box located on Section I. Refer to wiring diagram for terminal connections

6 5. REVIEW WIRING DIAGRAM TO ENSURE ALL WIRING AND CONNECTIONS HAVE BEEN COMPLETED. 6. After power wires are connected to Terminals L1 and L2, locate media compression panel at clean roll end. If not already done, move panel away from media run-out switch and block out of way, so that panel does not operate switch. This procedure should be followed with each section or sections of ARH AutoRoll unit. 7. With power supply on, operate motor with manual jog switch. If motor does not operate, recheck power wiring and be sure the media run-out switch is not closed. 8. Once motor has been operated by the manual jog switch, remove block from compression panel and allow it to operate the media run-out switch. This will shut off power to the motor and turn on the red signal light indicating that media replacement is necessary. 9. If the ARH AutoRoll unit is more than one (1) section, each compression panel must be operated as described in above items 6 and 8. For Pressure Control ARH Units, the Pressure Control System is rated NEMA 1 or as specified. D. FOR ARH --- OUTSIDE DRIVE 1. Refer to wiring diagram in installation packet for wiring schematic. 2. Control box for outside drive unit is remote mounted. Mount in secure, dry place. 3. Power lines and motor(s) must be wired into main control box. For ARH units with one (1) or two (2) section(s), the drive motor is provided with six (6) feet of flex conduit for connection to main control box. For ARH units with more than one (1) motor, the drive motor for Section I is provided with flex conduit and wiring for connection to junction box. The second motor is provided with a junction box for connection to EMT conduit which spans the width of the unit to the junction box located on Section I. Six (6) feet of flex conduit and wiring is provided from junction box for connection to main control box

7 4. Each section of ARH unit is provided with a media run-out switch which must be connected to main control box. Each switch is provided with six (6) feet of extra wiring, plus pin and socket connectors. These connectors must be plugged into appropriate receptacle labeled for individual section. 5. Units with timer control require connection of metering switch to main control box. The switch is provided with six (6) feet of extra wiring, plus a pin and socket connector to be plugged into receptacle marked for metering switch. 6. REVIEW WIRING DIAGRAM TO ENSURE ALL WIRING HAS BEEN COMPLETED. 7. After power wires are connected to Terminals L1 and L2, locate media compression panel at clean roll end. If not already done, move panel away from media run-out switch and block out of way, so that panel does not operate switch. This procedure should be followed with each section or sections of ARH AutoRoll unit. 8. With power supply on, operate motor with manual jog switch. If motor does not operate, recheck power wiring and be sure the media run-out switch is not closed. 9. Once motor has been operated by the manual jog switch, remove block from compression panel and allow it to operate the media run-out switch. This will shut off power to the motor and turn on the red signal light indicating that media replacement is necessary. 10. If the ARH AutoRoll unit is more than one (1) section, each compression panel must be operated as described in above items 7 and 9. E. FOR MRH --- HORIZONTAL MANUAL ROLL MACHINES The MRH does not require electrical wiring. VI. MEDIA INSTALLATION Units are now ready for roll media installation, starting from the clean roll compression panel. Refer to page 11 of this Technical Data document for media core installation and roll media orientation. Clean Roll Compression Panel area, showing Roll Media being pulled toward Take-Up Roll Core

8 OPERATION ADJUSTMENTS - Type ARH ANY ELECTRICAL WORK PERFORMED SHOULD BE DONE BY A QUALIFIED ELECTRICIAN 1. Pressure switch aluminum tubing: Installed and in correct position. See page Pressure switch aluminum tubing for blockages and obstructions. PRESSURE CONTROL If velocity of system exceeds 500 FPM and media usage is excessive, pressure switch set point may be raised. See page 9 for adjustment instructions. Dirt load such that unit runs all the time. Pressure switch set point must be raised. See page 9 for adjustment instructions. Maximum set point of pressure switch is 1" W.G. In resetting switch, a manometer should be used across media to determine clean air pressure drop. See page 9 of this document. See if timer reset switch (metering switch) is plugged into proper receptacle of control box. 2. Plug in from timer reset switch must be fully seated and locked down. TIMER CONTROL 3. T i mer reset switch wiring at switch to make sure wiring contacts are intact and properly wired. 4. See if cam on idler roller activates timer reset switch. should stop and start as switch is activated by cam.) (With power "ON", rotate idler roller. Drive motor PHOTOCELL CONTROL With power turned "OFF". Using a multimeter, check continuity of three (3) wires from timer reset switch to 24 volt terminal board. Wires should be removed one at a time and checked to ensure against feedback. Also check for continuity from plug-in receptacle to 24 volt terminal board. These checks should be made by a qualified electrician. The photocell is factory adjusted the photocell be readjusted. for normal dirt load conditions. Varying field conditions may require that A djustment: To adjust sensitivity, turn the adjusting screw (with a small screwdriver ) clockwise to increase sensitivity. This allows for greater dust loading on the media before the indexing motor is energized. Turn the adjusting screw counter-clockwise to decrease sensitivity. All adjustments should be made with a manometer reading the pressure drop across the media to ensure the desired pressure drop is obtained. Normally, it should be 0.50" W.G. I f m edia is not advancing often enough: Check sensitivity adjustment for "too high" setting. Readjust. See above item number 2. Check photocell alignment to light source. Gunsight type lens molded into the top of the case of the photocell and light source must be directly in line with each other. I f media is advancing too often or running continuously: setting. Readjust. See above item number 2. Check sensitivity adjustment for "too low" When working on equipment, be sure to read operation instructions supplied with equipment in regard to cautions. 2 CONTROLS * * * 1. NOTE: For AutoRoll types of control. I f media take-up is not occurring: sprocket and take-up core. units combining two (2) types of control, review this checklist for both Check to see that core drive trunnion is properly inserted in drive MEDIA TAKE-UP 2. See if all sprockets and chain are in working condition. 3. See that main power supply has not failed. 4. See if media is installed properly. S LAVE SECTION 1. I f slave section is inoperative: See if trunnion and coupling trunnion are installed properly, page 10. MEDIA RUN-OUT If t oo much media remains on the media core, decrease the length of compression panel's adjustmen t bolt to engage run-out switch later --- by resetting hex nuts. If n o media remains on the media core, increase the length of compression panel's adjustment bolt to engage run-out switch earlier --- by resetting hex nuts. DRIVE MOTOR 1. I f output motor does not operate: 2. See that main power supply has not failed. Internal gears may be stripped or windings may be burned out

9 DIFFERENTIAL PRESSURE SWITCH - Static Taps (For use with Pressure Switch only) ADJUSTMENT STANDARD OUTSIDE DRIVE INSTALLATION I. PRESET AT 0.50" W.G. The differential pressure switch has been preset at 0.50" W.G. Check the set point before placing in service, to assure it has not shifted in transit. Static Pressure Sensor Static Pressure Sensor II. IF AN ADJUSTMENT IS REQUIRED If an adjustment is required, observe the following procedure: A. To adjust the set point, turn the slotted adjustment screw clockwise to increase the set point and counter-clockwise to decrease the set point. B. IMPORTANT NOTE The following is a recommended procedure for calibrating or checking calibration: 1. Use a T assembly with three (3) rubber tubing leads, all as short as possible and with the entire assembly offering minimum flow restriction. 2. Run one (1) lead to the pressure switch, another to a manometer of known accuracy and appropriate range, and apply pressure through the third tube. 3. Make final approach to set point slowly. 4. Note that manometer and pressure switch will have different response characteristics due to different internal volumes, lengths of tubing, oil drainage, etc. 5. Be certain switch is checked in position it will assume in use (i.e.: vertical, horizontal, etc.) AIR FLOW Roll Media FOR INSIDE DRIVE UNITS LO HI Differential Pressure Switch Only the LO side static pressure sensor requires installation. The HI side static pressure sensor is factory installed

10 CORE AND TRUNNION INSTALLATION - Type ARH CLEAN ROLL MEDIA CORE OUTSIDE DRIVE TAKE-UP CORE No core trunnions are required. Install into tracks of media support plate assembly. Core Core Drive/Motor Trunnion Check rotation for proper air flow. Media MULTIPLE SECTION UNIT TAKE-UP CORE Media Support Plate Assembly Driven Trunnion Motor Assembly Drive Shaft SECTION II SLAVE SECTION SECTION I DRIVE SECTION INSIDE DRIVE TAKE-UP CORE Driven Trunnion Coupling Trunnion Core Drive Sprocket Media Support Plate Assembly Core Media Support Plate Assembly Driven Trunnion Inside Drive Plate Assembly Media Support Plate Assembly

11 Media Installation Instructions - Type ARH Media Support Plate STARTING UP NEW INSTALLATIONS STANDARD AIR FLOW OPEN POSITION CLOSED POSITION Core Core Locking Plate (CLP) 1. Open Open side access door. 2. Use hand Pull pull of each CLP. 3. Remove Remove core locking plates. 4. Insert Insert appropriate roll core. 5. Replace Replace core locking plates. 6. Close Close side access door. Door Closed 1. Determine Determine direction direction of air of flow air through flow through filter section(s). filter Standard section(s). or reverse Standard air flow. or reverse air flow. 2. Refer Refer to diagram to diagram to determine to determine how the how media the media unwinds from unwinds the clean from roll end the and clean is roll wound end up and at is the wound used roll end. up at the used roll end. 3. To install To install clean clean roll media, roll media, remove remove core core locking locking plates from plates tracks from by pulling tracks outward. by pulling outward. 4. Install Install clean clean roll media roll media into channels into channels of media of media support plates. support Check plates. rotation Check of roll rotation media for of roll proper media air flow direction. for proper air flow direction. 5. Secure Secure in place in place by replacing by replacing core core locking locking plates until they snap plates back until into they position. snap back into position. 6. Start Start paper paper leader leader of media of media around around idler idler roller roller and pull media and to pull the right media through down through guide channels. guide channels. Brake Plate Idler Roller Clean Media Roll Edge Seals Idler Roller AIR FLOW Used Media Roll TO INSTALL REPLACEMENT MEDIA 1. Remove Remove empty empty core from core clean from roll clean end roll of end filter of section(s). filter DO NOT section(s). DISCARD. DO NOT DISCARD. 2. Install Install clean clean roll of roll media of media into machine. into machine. Check Check rotation of roll rotation for proper of roll air for flow proper direction. air flow direction. 3. Attach Attach paper paper leader leader of clean of clean roll to roll trailer to trailer of dirty of roll. If attached dirty roll. properly, If attached the trailer properly, will the pull trailer the new will media into place pull the at the new take-up media. end. 4. Remove Remove dirty dirty roll(s) of media. REMOVE CORE CORE TRUNNIONS and discard and discard dirty dirty roll(s) roll of of media. 5. Place Place trunnions trunnions in empty in empty core core from from clean clean roll end roll and install end as and take-up install core. as take-up core. 6. Complete Complete roll media roll media installation installation as per as steps per steps 9 and 10 of Starting Up New Installations in this page. 7. Feed Fedd paper paper leader leader under under idler idler roller at at take-up end. 8. Take-up Take-up core for core used for roll used media roll media is factory is factory installed, but will need installed, to be removed but will need for installation to be removed of drive for trunnion. (Refer installation to page of drive 10 about trunnion. Core (Refer and to page Trunnion Installation.) 10 about Core Remove and Trunnion take-up Installation.) core and install trunnions. Remove Make take-up sure core and is replaced install trunnions. securely and trunnions Make are sure engaged. core. 9. Pull media Pull media end end to take-up to take-up core. core. Insert Insert media media leader under leader retaining under wire retaining of core wire and make of core two and (2) make or three (3) wraps two (2) around or three core (3) in direction wraps around of rotation core in for system air flow. direction of rotation for system air flow. 10. Operate Operate manual manual push push button button switch switch to ensure to ensure media is being media taken is being up. taken up. 11. For units For units with more with more than one than (1) 1 section, install media as in media first section. as in first Make section. sure Make driven sure trunnion driven and coupling trunnion trunnion and are coupling engaged, trunnion so that are engaged slave section core will so that rotate. slave (Refer section to page will rotate. 10 for details.) Brake Plate REVERSE AIR FLOW Idler Roller Clean Media Roll Edge Seals Idler Roller AIR FLOW Used Media Roll

12 PARTS LIST - Type ARH (Refer to the same numbers in pages 13 and 14 for identification of each part) NO. D ESCRIPTION OF PART NO. DESCRIPTION OF PART 1-18 MAIN FRAME COMPONENTS ELECTRICAL COMPONENTS 1. ( Ref. Only) - Side Panel Assembly 56. Relay 120/24 Volt 2. ( Ref. Only) - End Panel Assembly 57. Transformer 120/24 Volt 3. ( Ref. Only) - Media Support Plate Channel 58. Differential Pressure Switch 4. ( Ref. Only) - Brace Channel, Downstream 59. Timer Motor 5. ( Ref. Only) - Brace Channel, Upstream 60. Timer Potentiometer with Knob 6. ( Ref. Only) - Media Gridwire, Downstream 61. Push Button - NEMA 1 7. ( Ref. Only) - Media Gridwire, Upstream 62. Push Button with Enclosure - NEMA M edia Core Assembly --- (2, 3, 4, 5 Ft. Height) 63. Run-Out Light - NEMA C ompression Panel Assembly, Horizontal --- (2, 3, 4, 5 Ft. Height) 64. Run-Out Light with Enclosure - NEMA D oor Assembly --- (2, 3, 4, 5 Ft. Height) 65. Run-Out Switch 24 Volt - NEMA Idler Roller Assembly - Outside --- (2, 3, 4, 5 Ft. Height) Drive or Clean Roll End 66. Run-Out Switch Bracket, Horizontal 68. Media Index Switch 24 Volt - NEMA I dler Roller Assembly - Inside Drive --- (2, 3, 4, 5 Ft. Height) 69. Media Index Switch Bracket 17. Media Index Roller Assembly - Outside Drive, Timer Units Only --- (2, 3, 4, 5 Ft. Height) Driven Trunnio n DRIVE COMPONENTS 18. Media Index Roller Assembly - Inside Drive, Timer Units Only --- (2, 3, 4, 5 Ft. Height) 76. Coupling Trunnio n 77. Motor Sprocket M EDIA SUPPORT PLATE COMPONENTS 78. Motor Sprocket Key 26. ( Ref. Only) - Assembly - Clean Roll End - To p 79. Drive Chain - Outside 27. ( Ref. Only) - Assembly - Clean Roll End - Bottom 80. Drive Chain - Inside 28. ( Ref. Only) - Assembly - Drive End - Bottom 81. Drive Chain Connector 29. ( Ref. Only) - Assembly - Outside Drive 82. Driven Sprocket Assembly with Bushing 30. ( Ref. Only) - Assembly - Inside Drive 84. Snap Ring 31. S ub-assembly - Inside Drive, Horizontal 85. Drive/Motor Trunnio n 38. H and Pull 86. Drive/Motor Trunnion Key 41. M edia Support Plate - Core Block Set 87. Shaft Bushing - To p E LECTRICAL COMPONENTS 88. Set Collar 51. C ontrol Box - Outside Drive - NEMA Driven Sprocket 52. C ontrol Box - Inside Drive - NEMA Driven Sprocket Key 53. G earhead Motor 1/9 HP, 120 V 91. Drive Shaft 54. T erminal Block 12 Pole 92. Shaft Bushing - Bottom 55. T erminal Block 8 Pole 93. Drive/Motor Plate Assembly

13 PARTS IDENTIFICATION - Type ARH - Outside Drive (Refer to the same numbers in page 12 for description of each part) DETAILS OF CONTROL PANEL STANDARD DRIVE MOTOR IS 1/9 HP, 120 V. 50/60 HZ. SINGLE-PHASE. SEE DRIVE MOTOR ASSEMBLY DETAILS MOTOR & CONTROL NO DOORS FOR ROOF TOP UNITS SLAVE SECTION TRUNNION REQUIRED FOR USE WITH SLAVE SECTION TAKE-UP OF USED MEDIA CLEAN MEDIA END CLEAN ROLL COMPRESSION PANEL FOR TENSION ACROSS THE MEDIA FACE FOR TIMER UNITS ONLY USED MEDIA END

14 PARTS IDENTIFICATION - Type ARH - Inside Drive (Refer to the same numbers in page 12 for description of each part) DETAILS OF CONTROL PANEL STANDARD DRIVE MOTOR IS 1/9 HP, 120 V. 50/60 HZ. SINGLE-PHASE. SEE DRIVE MOTOR ASSEMBLY DETAILS MOTOR & CONTROL NO DOORS FOR ROOF TOP UNITS SLAVE SECTION TRUNNION REQUIRED FOR USE WITH SLAVE SECTION TAKE-UP OF USED MEDIA CLEAN MEDIA END CLEAN ROLL COMPRESSION PANEL FOR TENSION ACROSS THE MEDIA FACE FOR TIMER UNITS ONLY USED MEDIA END