Donaldson Torit Downflo DWST 4-1 User manual

This manual contains specic precautions related to worker safety. The hazard alert image denotes safety
related instructions and warnings in this manual. DO NOT install, operate, or perform maintenance on this
collector until you have read and understood the instructions, precautions and warnings contained within
this manual.
English
Master Language
Downo®Workstation
DWST 4-1, 4-2, 4-3, 4-4 and DWST 6-1, 6-2, 6-3 and 6-4
Installation and Operation Manual
Installation, Operation, and Service Information
IOM AG8550401 (ENG)
Revision 0

IMPORTANT NOTES
This manual has been supplied to assist with the installation, operation and maintenance for
the collector purchased. Please read the manual before installing, operating, or performing
maintenance on the collector as it contains specic precautions for worker safety. It is the
owner’s responsibility to ensure that this manual is available for use by installers, operators and
maintenance personnel that will be working with this collector. This manual is the property of the
owner and should be left with the collector when installation has been completed. DO NOT operate
this collector until you have read and understood the instructions and warnings located in this
manual.
For additional copies of this manual, contact Donaldson Torit.
The Safety Alert Symbol indicates a hazardous situation which, if not avoided could
result in death or serious injury. Obey all safety messages following this symbol to
avoid possible injury or death. The possible hazards are explained in the associated
text messages.
The Notice symbol indicates a potential situation or practice which is not
expected to result in personal injury, but which if not avoided may result in
damage to equipment.
Donaldson Company, Inc.
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Magnehelic®and Photohelic®are registered trademarks of Dwyer Instruments, Inc.
Downo Workstation, DWST 4-1 to 6-4
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Contents
IMPORTANT NOTES ............................................................................................................................................................................i
2 Product Description...................................................................................................................................................................3
3 Operation...................................................................................................................................................................................4
4 Product Service.........................................................................................................................................................................5
Operational Checklist .........................................................................................................................................................5
Dust Drawer........................................................................................................................................................................6
Filter Replacement .............................................................................................................................................................6
Light Bulb Replacement .....................................................................................................................................................7
Optional Afterlter Replacement.........................................................................................................................................7
Troubleshooting..................................................................................................................................................................8
Appendix A - Collector Installation................................................................................................................................................. A1
Collector Installation ........................................................................................................................................................ A2
Collector Location and Site Selection....................................................................................................................... A2
Provisional Anchor Bolt Recommendations ............................................................................................................. A2
Delivery and Inspection............................................................................................................................................ A3
DWST 4-1 and 6-1 Single Power Module Installation .............................................................................................. A4
DWST 4-2 to 4-4 and 6-2 to 6-4 Multiple Power Module Installation........................................................................ A5
Acoustic Hard Sided Booth Assembly ...................................................................................................................... A6
Soft Sided Acoustical Booth Assembly..................................................................................................................... A8
Compressed Air Installation...................................................................................................................................... A9
Electrical Wiring........................................................................................................................................................ A9
Solid-State Timer Installation..........................................................................................................................................A11
Optional Equipment....................................................................................................................................................... A15
Magnehelic®Gauge ............................................................................................................................................... A15
Photohelic®Gauge ................................................................................................................................................ A16
Delta P Control ...................................................................................................................................................... A18
Delta P Plus Control............................................................................................................................................... A18
Light Fixture ........................................................................................................................................................... A18
Afterlters ............................................................................................................................................................... A18
Acoustic Curtain for Power Module ........................................................................................................................ A19
Chamber Silencer................................................................................................................................................... A19
IEC Control Panel with Programmable Logic Control ............................................................................................ A20
IEC Control Panel Installation ................................................................................................................................ A22
Sprinkler ................................................................................................................................................................. A23
Start-Up/Commissioning Collector ................................................................................................................................ A24
Decommissioning Collector........................................................................................................................................... A26
Product Information ....................................................................................................................................................... A27
Service Notes ................................................................................................................................................................ A28
Donaldson Industrial Air Filtration Warranty................................................................................................................................ A30

Donaldson Company, Inc.
1
Improper operation of dust collectors and/or dust control systems may contribute to conditions in a work area or facility
which could result in severe personal injury, and product or property damage. All dust collection equipment should be
used only for its intended purpose and should be properly selected and sized for its intended use.
Process owners have important responsibilities relating to identifying and addressing potential hazards in their
processes. When the potential for handling combustible dust exists within a process the process owner should include
combustion hazards in their risk management activities and should comply with applicable codes and standards related
to combustible dust.
Electrical installation must be performed by a qualied electrician.
This equipment is not designed to support site ducts, piping, or electrical services. All ducts, piping, or electrical services
must be adequately supported to prevent injury and/or property damage.
Site selection must account for wind, seismic zone, and other load conditions.
Equipment may reach peak sound pressure levels above 80 dB (A). Noise levels should be considered when selecting
collector location.
Most dusts present safety and health hazards that require precautions. Wear eye, respiratory, head and other protection
equipment suitable for the type of dust.
Some components may be heavier than they appear. Use appropriate lifting methods to avoid personal injury and/or
property damage.
1 Safety Communication

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Downo Workstation, DWST 4-1 to 6-4
Combustible Dust Hazards
Among other considerations, the current NFPA standards require owners whose processes involve potentially combustible
materials to have a current Dust Hazard Analysis, which can serve as the foundation for their process hazard mitigation strategy.
Mitigation may include but is not limited to:
• Prevention of all ignition sources from entering any dust collection equipment.
• Selection and implementation of re and explosion mitigation, suppression, and isolation strategies appropriate for the
risks in their process.
• Development and use of work practices to maintain safe operating conditions, and to ensure combustible dust does not
accumulate within their plant or process equipment.
Donaldson designs, manufactures, and sells industrial air ltration products for a wide variety of applications. Some applications
may include processes or materials with inherent re and explosion hazards. Donaldson is neither an expert nor a certied
consultant in re, spark, or explosion detection, suppression, or control. Donaldson does not provide engineering consulting
services related to process or dust hazard analyses, or code and standard compliance. Complying with applicable codes and
standards and managing the risks associated with the process or materials remains the responsibility of the process owner/
operator. Donaldson may provide referrals to consultants, suppliers of equipment or services related to the detection and/
or mitigation of sparks, res and/or explosions, but Donaldson does not assume responsibility for any such referrals, nor does
Donaldson assume any liability for the tness of a mitigation strategy or product for a particular installation or application. The
process owner’s nal selection of dust collectors and risk mitigation strategies should be based on the outcome of a Dust Hazard /
Process Hazard Analysis performed by the process owner. Although early engagement of a dust collector supplier provides helpful
insights on the availability and features of various products, process owners should consult with a combustible dust expert and/or a
process safety expert before making actual product and mitigation strategy selections.
Donaldson recommends that all industrial air ltration system designs be reviewed and approved by an expert consultant who is
responsible for the integrity of the system design and compliance with applicable codes and standards. It is the process owner’s
responsibility to understand the risks in their process and mitigate those risks in accordance with all applicable laws, regulations
and standards, including those published by the NFPA. Donaldson also recommends that proper maintenance and housekeeping
procedures and work practices be evaluated, developed, and followed to maintain any industrial air ltration products in safe
operating condition.
Many factors beyond the control of Donaldson can affect the use and performance of Donaldson products in a particular
application, including the conditions under which the product is used. Since these factors are uniquely within the user’s knowledge
and control, it is essential the user evaluate the Donaldson products to determine whether the product is t for the particular
purpose and suitable for the user’s application. All products, product specications, and data (airow, capacity, dimensions, or
availability) are subject to change without notice, and may vary by region or country.

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Donaldson Company, Inc.
The Downo WorkStation (DWST), is a continuous duty, self contained, modular workstation with cartridge style lters. Continuous
duty means the lters can be pulse cleaned on-line without interrupting airow through the collector. The lters are pulse-cleaned
in sequence, one at a time, without turning the collector off. The modular design creates a custom collector for each application.
The DWST power module includes a blower, two (2) dust drawers (available in either metal or plastic), a louver air inlet that can be
located in a high or low position, and a ledge less design to reduce dust build up in the collector. Models DWST 4-1, 4-2, 4-3, 4-4,
and DWST 6-1, 6-2, 6-3, 6-4 power modules can have joining strips to tie modules together.
Optional booths can be applied for all models. Designed to increase versatility of the collector, standard options include heavy duty
wall and ceiling acoustic panels. They also include a ceiling light for each power module on hard sided and roof booths in dust
tight or ush mounting lighting. Soft side weld and acoustical curtain booths are also available with a clear plastic ceiling to allow
plant light to illuminate the booth. Also, a moveable side shield with canopy booth is available for one module and two module
congurations.
Intended Use
The DWST is commonly installed in applications where dust containment from a specic operation is required. Typical applications
include; abrasive blasting, batch mixing and grinding.
While the DWST effectively contains dust generated within the work area, it does not provide source capture of dust and some
noise will be emitted from the booth. The 200 fpm indraft velocity produced by each power module is generally sufcient to prevent
nuisance dust from escaping the DWST.
Abrasive Blasting
Abrasion-resistant options include an open louver inlet and smooth wall booth. Recommended options include: a control panel
for reduced installation expense, ush lights for increased headroom, and ASHRAE or HEPA afterlters to monitor primary lter
performance for added safety on hazardous dust.
Batch Mixing
Dumping and mixing operations often produce signicant amounts of nuisance or hazardous dust. The DWST provides effective
dust control and allows complete freedom of movement. ASHRAE or HEPA afterlters can be added to monitor primary lter
performance for added safety on hazardous dust.
Grinding
The DWST gives the worker complete freedom of movement while grinding or moving around large or odd-shaped parts. Open-
pleat Fibra-Web or Ultra-Tek® lters are required for the brous nature of composite dust. Recommended options include acoustic
panels for a quieter work environment, control panel for reduced installation expense, ush lights for increased headroom, and
HEPA afterlters to monitor primary lter performance for added condence on composite dust and for hazardous dust such as
chromium, cadmium, and zinc.
2 Product Description

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Downo Workstation, DWST 4-1 to 6-4
3 Operation
During normal operation, the power module containing the blower draws dust-laden air from the work space through the lter
cartridges. Dust collects on the outside surface of the lters. Clean, ltered air ows through to the center of the cartridge, through
the clean-air plenum and into the blower silencer plenum. Filtered air exits through the top of the cabinet.
Filter cleaning is completed using pulse-jet technology. A solenoid valve controlled by a solid-state timer and a diaphragm valve
aligned to each lter provides the pulse cleaning. The diaphragm valve sends a pulse of compressed air through the lter cartridge
from the inside out and collected contaminants fall into the dust drawers. At the end of each pulse, the diaphragm valve closes and
the lter cartridge resumes normal operation. One lter cartridge is cleaned per pulse.
Electrical work during installation, service or maintenance must be performed by a qualied electrician and comply
with all applicable national and local codes.
Turn power off and lock out all power before performing service or maintenance work.
Turn compressed air supply off, bleed and lock out lines before performing service or maintenance work.
Check that the collector is clear and free of all debris before starting.
Do not install in classied hazardous atmospheres without an enclosure rated for the application.
Collector Operation
clean air outlet
silencer
plenum
fan blower
dirty-air
inlet
lter
cartridges
dust
drawers
lter clean
purge
Filter during pulse cleaning

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Donaldson Company, Inc.
4 Product Service
Operational Checklist
1. Monitor the physical condition of the collector and repair or replace any damaged components.
Routine inspections will minimize downtime and maintain optimum system performance. This is particularly important on
continuous-duty applications.
2. Periodically check the compressed air components and replace compressed air lters.
Drain moisture following the manufacturer’s instructions. With the compressed air supply ON, check the cleaning valves,
solenoid valves, and tubing for leaks. Replace as necessary.
3. Monitor pressure drop across lters.
Abnormal changes in pressure drop may indicate a change in operating conditions and possibly a fault to be corrected. For
example, prolonged lack of compressed air will cause an excess build-up of dust on the lters resulting in increased pressure
drop. Cleaning off-line with no airow usually restores the lters to normal pressure drop.
4. Monitor exhaust.
5. Monitor dust disposal. Empty the dust drawers at the end of each shift, or more frequently if necessary. Dust drawers should
be emptied when they are more than 2/3 full.
6. Check fan wheel set screws. Set screws should be checked and retightened to 10.5 foot pounds for 3/8-in stainless steel
set screws and 25 foot pounds for 1/2-in stainless steel set screws after eight hours of operation and again after 80 hours of
operation.
Set screws on fan wheels must be properly tightened to avoid severe personal injury and/or property damage.
During any service activities there is some potential for exposure to the dust in the collector. Most dusts present
safety and health hazards that require precautions. Wear eye, respiratory, head and other protection equipment
suitable for the type of dust when performing any service activities.
Use appropriate access equipment and procedures. Note the standard collector is not equipped with access
platforms unless noted on the specication drawings.
LOCK-OUT all energy sources prior to performing any service or maintenance on the equipment.
Electrical service or maintenance work must be performed by a qualied electrician and comply with all applicable
national and local codes.
Turn compressed air supply OFF, bleed and lock out lines before performing service or maintenance work.
Do not set compressed-air pressure above 70-psig as component damage can occur.
All compressed air components must be sized to meet the system requirements of 50-70-psig supply
pressure.
The compressed-air supply must be oil and moisture free. Contamination in the compressed air used to clean lters
will result in poor cleaning, cleaning valve failure, or poor collector performance.
Purge compressed air lines to remove debris before connecting to the collector’s compressed air manifold.

Downo Workstation, DWST 4-1 to 6-4
6
1. Remove lter cartridges by removing the top and bottom access
cover. Start with the top covers rst.
2. Turn the knob counter clockwise. Remove access cover.
3. Break the seal between the lter cartridge and the sealing surface.
4. Slide each lter out the access port along the suspension yoke
and dispose of properly.
Note the alignment of the lter to ensure the
correct edge is up.
5. Clean any dust from the yoke threads that may have accumulated
during the lter removal.
6. Inspect and clean the sealing surface of the tubesheet prior to
installing a new lter.
Clean dust from gasket sealing area to
ensure a positive lter gasket seal.
Most dusts present safety and health hazards that require precautions. Wear eye, respiratory, head and other
protection equipment suitable for the type of dust.
Use proper safety and protective equipment when removing contaminants and lters.
Dirty lters may be heavier than they appear. Use appropriate lifting methods to avoid personal injury and/or property
damage.
Turn power off and lock out all power before performing service or maintenance work.
Turn compressed air supply OFF, bleed and lock out lines before performing service or maintenance work.
Do not operate with missing or damaged lters.
Filter Replacement
smooth corner
Triagonal Access Cover
Dust Drawer
Dust drawers should be emptied at the end of each shift or more frequently if necessary (when 2/3 full).
1. Pull each dust drawer from the base of the power module.
2. Inspect and remove any residual dust from the base of the power module.
3. Cover the dust drawer to prevent leakage from the drawer during transport, and transport to an appropriate dust disposal
location.
4. Empty the dust from the drawer into an appropriate disposal container
5. Return each drawer to the base of the power module, ensuring the drawers are both inserted fully to the back of the power
module.

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Donaldson Company, Inc.
7. Check for any accumulation of dust remove as necessary.
8. Install a new lter onto yoke with gasket oriented towards the collector.
9. Reinstall the access cover onto yoke. The smooth corner of the cover should be oriented towards the top as shown in the
triagonal access cover.
10. Engage knob and turn clockwise to seal the gasket on the lter to the tubesheet. Tighten knob by hand or tool.
The access cover must be properly aligned to ensure a dust tight seal to the housing.
Do not exceed 150-in- lbs (12.5 ft-lbs) torque when securing the access cover as over tightening may
cause damage to the lter and/or equipment.
When lter replacement is complete, check to ensure that each access cover is seated and sealed against the lter
housing to ensure a dust tight housing seal.
Light Bulb Replacement
This light xture is serviced from inside the booth. Replace per the light manufacturers specications.
Optional Afterlter Replacement
1. Loosen the retaining screws and clamping straps and pull the afterlters out of the frames.
2. Install the new afterlters with the seal edge towards the power module cabinet. Airow is from the inside of the plenum to the
outside.
3. Position the clamping straps and tighten the wing screws to secure the new afterlter.