Downflo® Oval DFO 2-8, 2-12, 2-16, 2-24, 2-36 3-10, 3-12, 3-18, 3-24, 3-36, 3-48, 3-60, 3-72, 4-16, 4-32, 4-48, 4-64, 4-80, 4-96, 4-112, and 4-128 Installation and Operation Manual Installation, Operation, and Service Information This manual is property of the owner. Leave with the unit when set-up and start-up are complete. Donaldson Company reserves the right to change design and specifications without prior notice. Illustrations are for reference only as actual product may vary.
Donaldson Company, Inc. APPLICATION OF DUST CONTROL EQUIPMENT Combustible materials such as buffing lint, paper, wood, metal dusts, weld fume, or flammable coolants or solvents represent potential fire and/or explosion hazards. Use special care when selecting, installing, and operating all dust, fume, or mist collection equipment when such combustible materials may be present in order to protect workers and property from serious injury or damage due to a fire and/or explosion.
Downflo Oval, DFO 2-8 to 4-128 Contents Description.................................................................................1 Purpose and Intended Use .....................................................1 Rating and Specification Information....................................2 Operation....................................................................................3 Inspection on Arrival................................................................4 Installation Codes and Procedures........
Donaldson Company, Inc. Description Purpose and Intended Use The Downflo Oval dust collector is a continuousduty, modular collector with cartridge-style filters. The downward airflow design delivers high filtration efficiency while using less energy. Continuous-duty means no downtime. The filters are pulse-cleaned in sequence, one set at a time, without turning the unit off. The modular design allows flexibility in system design and adapts easily to limited space areas.
Downflo Oval, DFO 2-8 to 4-128 Rating and Specification Information Front DFO 2-Model DFO 2-12 Front 3-wide models Front DFO 3-Model DFO 3-18 Front 3-wide models Front DFO 4-Model Typical Side View All Units (as per IBC 2006 Specifications*): Seismic Spectral Acceleration, Ss................................. .1.5 g Seismic Spectral Acceleration, S1.................................. 0.6 g Installed Unit Base Elevation.........................................Grade Occupancy Category...................
Donaldson Company, Inc. Operation During normal operation, dust-laden air enters the unit through the dirty-air inlet. Airflow is directed downward through the collector and heavier particulate falls directly into the hopper. The cartridges remove fine particulate and clean, filtered air passes through the cartridge to the clean-air plenum and discharges through the clean-air outlet. Filter cleaning is completed using pulse-jet technology.
Downflo Oval, DFO 2-8 to 4-128 Inspection on Arrival Installation 1. Inspect unit on delivery. Site suitability must account for wind, seismic zone, and other live-load conditions when selecting the location for all units. 2. Report any damage to the delivery carrier. 3. Request a written inspection report from the Claims Inspector to substantiate any damage claim. Codes may regulate acceptable locations for installing dust collectors.
Donaldson Company, Inc. Electrical Wiring If explosion protection devices are part of the system, locate the collector in accordance with local code requirements (Example: NFPA 654). These codes may require units handling combustible dust be located either outside or against an exterior wall.
Downflo Oval, DFO 2-8 to 4-128 Typical Installation 1. Place hopper discharge-side up on ground or other level surface and attach legs to hopper. 2. Assemble leg cross braces. 3. Turn hopper and leg assembly over and lift into position over anchor bolts. 4. Level hopper. 5. Tighten all fasteners securely. 6. Apply rope sealant to hopper flange. 7. Lift unit over leg and hopper assembly and lower slowly. 8. Secure with bolts, washers, and nuts supplied. 9. Remove crane. 10.
Donaldson Company, Inc. Standard Equipment Standard equipment consists of modules, hoppers, and legs. The legs and hopper are assembled first and the unit is placed using a crane. Collectors with up to seven modules require one crane for installation and units containing eight or more modules require two cranes. Field Assembly Leg sets are designed for standard height collectors and are rated as shown in the Rating and Specification Information.
Downflo Oval, DFO 2-8 to 4-128 5. Turn leg and hopper assembly over and position over anchor bolts. Secure each leg pad to the foundation anchor bolts with customer-supplied flat washers, lock washers, and nuts. Do not tighten hardware at this time. single module DFO 2-8, 3-12 and 4-16 DFO 3-18 5-module DFO 3-60 and 4-80 8-module DFO 4-128 dual module DFO 3-24 DFO 2-16 and 4-32 and 2-24 6. Level hopper. 7. Tighten all hardware securing legs, cross braces, hopper gussets, and foundation anchor bolts.
Donaldson Company, Inc. Module Assembly NOTICE Two cranes are required to lift and assemble modules. 1. Remove the protective cover from the end of each module. 2. Remove one column of access covers, filters, venturis, yokes, and deflector panels from the jointside of each module. See Detail A. 4. Apply a generous amount of sealant to one module to create an airtight seal between the clean- and dirtyair plenums as shown in Detail B. 5. Lift both modules into position using two cranes. 6.
Downflo Oval, DFO 2-8 to 4-128 7. Bolt the modules together using 1/2-13 and 3/8-16 x 1 1/4-in bolts, washers, and nuts as shown Details B, C, and D. Do not tighten hardware at this time. 8. Check that all joints and flanges are flush and tighten hardware starting with the joint between the cleanand dirty-air plenums. Remove excess sealant.
Donaldson Company, Inc. Deflector Plate, Yoke, Venturi, and Filter Installation NOTICE Installing yokes requires two people. 1. Attach deflector plates to the support angles using 3/8-16 x 1 1/4-in bolts, washers, and nuts as shown in Detail E. 2. From the clean air plenum (to access, remove the outlet cover, see Detail H), thread a thin jam nut to the shoulder of each of the two yoke rod ends. See Detail G and H. 3. Start at the top access port and work downward. Position the yoke as shown in Detail F.
Downflo Oval, DFO 2-8 to 4-128 venturi 3/8-in hex nut 3/8-in flat washer 3/8-in lock washer filter cartridge panel 3/8-in hex jam nut yoke shoulder Detail G 3/8-in flat washer 3/8 x 1-in thread-forming screw outlet cover clean-air plenum Detail H 12
Donaldson Company, Inc. Compressed Air Installation Turn compressed-air supply OFF and bleed lines before performing service or maintenance work. 1. Remove the plastic pipe plug from the unit’s air manifold and connect the compressed-air supply line. Use thread-sealing tape or pipe sealant on all compressed-air connections. A safety exhaust valve should be used to isolate the compressed air supply.
Downflo Oval, DFO 2-8 to 4-128 dirty-air inlet duct* clean-air outlet clean-air plenum diaphragm valve air manifold solenoid enclosure solenoid electrical connection* air line to manifolds* 4 air regulator* 3 2 bleed-type air filter* 1 safety exhaust valve* automatic condensate valve* air supply line* 1. 2. 3. 4.
Donaldson Company, Inc. Solid-State Timer Installation Electrical installation must be performed by a qualified electrician and comply with all applicable national and local codes. Turn power off and lock out electrical power sources before performing installation, service, or maintenance work. Do not install in classified hazardous atmospheres without an enclosure rated for the application.
Downflo Oval, DFO 2-8 to 4-128 Input 105-135V/50-60Hz/1Ph Operating Temperature Range -20° F to 130° F Output Solenoids The load is carried and turned ON and OFF by the 200 watt maximum-load-per-output solid-state switch. Transient Voltage Protection 50 kW transient volts for 20-millisecond duration once every 20 seconds, 1% duty cycle. Pulse ON Time Factory set at 100-milliseconds, or 1/10-second. Solenoid Valves 115-V at 19.
Donaldson Company, Inc. Preliminary Start-Up Check Instruct all personnel on safe use and maintenance procedures. Electrical work during installation must be performed by a qualified electrician and comply with all applicable national and local codes. Turn power off and lock out electrical power sources before performing service or maintenance work. Turn compressed air supply OFF and bleed lines before performing service or maintenance work.
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Donaldson Company, Inc. Maintenance Information Instruct all personnel on safe use and maintenance procedures. Use proper equipment and adopt all safety precautions needed for servicing equipment. Electrical service or maintenance work must be performed by a qualified electrician and comply with all applicable national and local codes. instructions. With the compressed air supply ON, check the cleaning valves, solenoid valves, and tubing for leaks. Replace as necessary. 2.
Downflo Oval, DFO 2-8 to 4-128 Filter Access Cover Removal (Side View) yoke access cover filter cartridge yoke latched access cover cover handle unlatched removal Optional and Bag-In/Bag-Out Filter Access Cover Removal (Top View) access cover yoke access cover hook Front of Collector latched unlatched removal Filter Replacement 20
Donaldson Company, Inc. 6. Clean the sealing surface with damp cloth. NOTICE gasket seal. Clean dust from gasket sealing area to ensure a positive filter 7. Check for an accumulation of dust in the storage area and empty as necessary. Dust Disposal 1. Turn unit OFF and empty dust container as necessary to minimize dust in the hopper. 2. If the optional 55-gallon drum attachment is used, empty when drum is 2/3 full. 3. If optional slide gate is used, close gate before servicing drum.
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Donaldson Company, Inc. Optional Equipment Power Pack The two types of power packs, Torit Backward Inclined, TBI, and Torit Radial Blade, TRB, are installed following the same procedure. Both can be ordered for top or side mount. 1. The power packs are shipped assembled and partial disassembly is required before installing. 5. Rotate fan wheel after installation to ensure proper clearance between the inlet cone and the fan wheel.
Downflo Oval, DFO 2-8 to 4-128 motor mount motor mount blower wheel sealant sealant blower wheel blower housing blower housing sealant spacer spool sealant spacer ring sealant collector mounting surface sealant Top Mount Power Pack with Spacer Ring Top Mount Power Pack with Spacer Spool Power Pack, TBI with Spacer Ring and TBI with Spacer Spool for Explosion Vented Units 24
Donaldson Company, Inc. Side-Mount Power Pack (for Units Built After July 2003) Electrical work must be performed by a qualified electrician and comply with all applicable national and local codes. Turn power off and lock out electrical power sources before performing service or maintenance work. Do not install in classified hazardous atmospheres without an enclosure rated for the application.
Downflo Oval, DFO 2-8 to 4-128 3/8-16 bolt 3/8-in flat washer hopper flange 1/8-in gasket spacer slide gate 3/8-in lock washer 3/8-16 hex nut drum cover flexible hose hose clamp customer-supplied 55-gallon drum optional latch 55-Gallon Drum Pack with Slide Gate 3/8-16 bolt hopper flange 3/8-in flat washer adapter 1/4-in diameter rope-type sealant 3/8-in lock washer drum cover 3/8-16 hex nut flexible hose hose clamp customer-supplied 55-gallon drum optional latch 55-Gallon Drum Pack without Sl
Donaldson Company, Inc. Without Slide Gate 1. Place 1/4-in diameter, rope-type sealant between the hopper flange and the adapter as shown. 3. Attach the drum cover to the 55-gallon drum. 2. Plug the pressure ports on the back of the gauge using two, 1/8-in NPT pipe plugs supplied. Install two, 1/8-in NPT male adapters supplied with the gauge into the high- and low-pressure ports on the side of the gauge. Attach the mounting bracket using three, #6-32 x 1/4-in screws supplied. 4.
Downflo Oval, DFO 2-8 to 4-128 clean-air plenum pressure tap location 1/8-in NPT adapter plenum tap location 3/8-in flat washer 1/8-in NPT x 90° male elbow Magnehelic gauge high-pressure port low-pressure port 1/8-in NPT coupling two, 1/8-in NPT adapters plastic tubing two, 1/8-in NPT pipe plugs support structure mounting surface two, self-drilling screws 1/8-in NPT x 90° male elbow #6-32 x 1/4-in mounting screws mounting bracket 1/8-in NPT adapter dirty-air plenum pressure tap location 3/8-in fla
Donaldson Company, Inc. Photohelic Gauge Electrical work must be performed by a qualified electrician and comply with all applicable national and local codes. Turn power off and lock out electrical power sources before performing service or maintenance work. Do not install in classified hazardous atmospheres without an enclosure rated for the application. The Photohelic combines the functions of a differential pressure gauge and a pressure-based switch.
Downflo Oval, DFO 2-8 to 4-128 NPT male adapter 1/8-in NPT male adapter Photohelic gauge high-pressure port low-pressure port two 1/8-in NPT adapters clean air plenum pressure tap location plastic tubing 1/8-in NPT male adapter dirty air plenum pressure tap location static pressure tee Photohelic Gauge, Remote Panel or Door Installation 30
Donaldson Company, Inc. Delta P Control The Delta P Control monitors the differential pressure between the clean and dirty air plenums, providing a visual display of the filter condition. When combined with a pulse timer, it controls the pressure drop by turning the cleaning mechanism On and Off at the chosen limits. There are three (3) set points: High Pressure On, Low Pressure Off, and Alarm. The first two, High Pressure On and Low Pressure Off, control the filter cleaning system.
Downflo Oval, DFO 2-8 to 4-128 Delta P Plus Control The Delta P Plus Control monitors the differential pressure between the clean and dirty air plenums, providing a visual display of the filter condition. When combined with a pulse timer, it controls the pressure drop by turning the cleaning mechanism On and Off at the chosen limits. There are three (3) set points: High Pressure Drop On, Low Pressure Drop Off, and Alarm.
Donaldson Company, Inc. Transition and Rotary Valve Rotating blades can cause serious injury. Turn power off and lock out electrical source before performing service or maintenance work. Keep hands, feet and loose clothing away from both inlet and outlet openings to avoid injury or damage when valve is operating. The 7-in tall transition is designed to connect a standard hopper and a rotary valve. Rotary valves are used as an airlock and a metering device in dust control applications.
Downflo Oval, DFO 2-8 to 4-128 Damper and Silencer, TBI Side and Top Mount 1. Install the power pack as described in the previous section. c. Secure brackets using 3/8-in thread-forming bolts. 2. Attach the damper to the fan exhaust outlet using the hardware supplied. d. If a gap exists between the silencer and the damper, install the panel filler using the screws provided. 3. Attach the flange to the damper using the bolts, washers, and hex nuts supplied. Support Brackets, Side Mount 4.
Donaldson Company, Inc. Plenum Silencer, TRB Abrasion-Resistant Inlet Collar Top Mount 1. Remove the unit’s front cover plate. Remove excess sealant from opening. 1. Apply sealant and attach the bottom panel to the collector as described on the assembly drawing shipped with the silencer using a combination of hardware removed from the unit and hardware supplied. 2. Install the fan and motor assembly as described in the Power Pack section and the assembly drawing. 2.
Downflo Oval, DFO 2-8 to 4-128 Extended Dirty-Air Plenum Air Management Module The extended dirty-air plenum is used in applications requiring an air management module, an end inlet, or when a single inlet serves multiple modules. The air management module is used in applications involving heavy grain loading, large or abrasive particles in the airstream, or in applications when a collector with a single inlet serves multiple modules.
Donaldson Company, Inc. Platforms and Ladders Stationary platforms are available for use on single to eleven module, two filter wide units and three module, three filter wide units. For two filter wide units the platform is available for standard or steep-sided hoppers with the ladder located left, right, or front of the platform. On three filter wide units the platform is available for standard hoppers only with ladder access on the left or right side only.
Downflo Oval, DFO 2-8 to 4-128 Cold Climate Kit Electrical work during installation must be performed by a qualified electrician and comply with all applicable national and local codes. Turn power off and lock out electrical power sources before performing service or maintenance work. A cold climate kit provides heat to the pulse valves to prevent cold weather freeze up.
Donaldson Company, Inc. Explosion Vents Personal injury, death, or property damage can result from material discharge during venting. The material discharged during the venting of an explosion must be safely directed outdoors away from areas occupied by personnel to reduce risk of personal injury or property damage. The risk of injury or damage can be minimized or avoided by locating vented equipment outside buildings and away from normally occupied areas.
Downflo Oval, DFO 2-8 to 4-128 Troubleshooting Problem Probable Cause Remedy Power pack fan and motor do not start Improper motor wire size Rewire using the correct wire gauge as specified by national and local codes. Check and correct motor wiring for supply voltage. See motor manufacturer's wiring diagram. Follow wiring diagram and the National Electric Code. Correct wiring for proper supply voltage.
Donaldson Company, Inc. Troubleshooting Problem Probable Cause Remedy Insufficient airflow continued Lack of compressed air See Rating and Specification Information for compressed air supply requirements. Use a voltmeter to check the solenoid valves in the control panel. Check pneumatic lines for kinks or obstructions. Clean out dust storage area. See Dust Disposal.
Downflo Oval, DFO 2-8 to 4-128 Problem Probable Cause Remedy Pulse cleaning never stops Pressure switch not wired to the timer board correctly Pressure switch terminals on the timer board jumpered High Pressure On or Low Pressure Off setpoint not adjusted for system conditions Pressure tubing disconnected, ruptured, plugged, or kinked Alarm setpoint too low Excess pressure drop Connect the pressure switch on the timer board to Terminals 7 and 8 on TB3.
Donaldson Company, Inc.
The Donaldson Torit Warranty Donaldson warrants to the original purchaser that the major structural components of the goods will be free from defects in materials and workmanship for ten (10) years from the date of shipment, if properly installed, maintained and operated under normal conditions.
