Donaldson Torit Downflo II User manual

Installation
and Operation Manual
IOM AD3310701
Revision 7
Downflo®II
DFT 2-8, 2-12, 2-16, 2-24, 2-36
DFT 3-12, 3-24, 3-26, 3-48, 3-60, 3-72,
DFT 4-16, 4-32, 4-48, 4-64, 4-80, 4-96, 4-112, 4-128
Units Built After July 2003
Throughout this manual
statements indicating
precautions necessary
to avoid equipment failure
are referenced in a Note. Statements
indicating potential hazards that
could result in personal injury or
property damage are referenced
in a CAUTION! box.
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.

Donaldson Company, Inc.
2
Data Sheet
Model Number _______________________________ Serial Number ________________________________
Ship Date ____________________________________ Installation Date ______________________________
Customer Name ____________________________________________________________________________
Address ____________________________________________________________________________
____________________________________________________________________________
Filter Type ____________________________________________________________________________
Accessories ____________________________________________________________________________
Other ____________________________________________________________________________
CAUTION!
Application of Dust Control Equipment
• Combustible materials such as buffing lint, paper, wood, aluminum or steel dust, weld
fume, or flammable solvents represent fire or explosion hazards. Use special care when
selecting and operating all dust or fume collection equipment when combustible
materials are present to protect workers and property from damage due to fire and/or
explosion. Consult and comply with National and Local Codes relating to fire or
explosion and all other appropriate codes when determining the location and operation
of dust or fume collection equipment.
• When combustible materials are present, consult with an installer of fire extinguishing
systems familiar with these types of fire hazards and local fire codes for
recommendations and installation of fire extinguishing and explosion protection
systems. Donaldson Torit dust collection equipment is not equipped with fire
extinguishing or explosion protection systems.
• DO NOT allow sparks, cigarettes or other burning objects to enter the hood or duct of
any dust or fume control equipment as these may initiate a fire or explosion.
• For optimum collector performance, use only Donaldson Torit replacement parts.
Warning – Improper operation of a dust control system may contribute to conditions in the work
area or facility that could result in severe personal injury and product or property damage. Check
that all collection equipment is properly selected and sized for the intended use.

Downflo II, Model DFT 2-8 through 4-128
3
This manual contains specific precautionary statements relative to worker safety. Read
thoroughly and comply as directed. Discuss the use and application of this equipment with a
Donaldson Torit representative. Instruct all personnel on safe use and maintenance
procedures.
Magnehelic®and Photohelic®are registered trademarks
of Dwyer Instruments, Inc.
Contents
Description ........................................................... 4
Purpose and Intended Use..................................... 4
Rating and Specification Information ................... 5
Operation ............................................................. 6
Inspection on Arrival ............................................ 7
Installation Codes and Procedures ........................ 7
Installation ........................................................... 7
Site Selection, Grade-Mounted Units .............. 7
Unit Location.................................................. 7
Electrical Wiring ................................................... 8
Rigging Instructions.............................................. 8
Hoisting Information ...................................... 8
Typical Installation ............................................... 9
Standard Equipment ........................................... 10
Field Assembly .............................................. 10
Module Assembly ......................................... 11
Yoke, Venturi, and Filter Installation ............ 12
Hopper Installation....................................... 13
Leg Installation ............................................. 14
Compressed Air Installation ......................... 16
Solid-State Timer Installation ............................. 18
Solenoid Connection ..................................... 18
Timer and Solenoid Specifications ................ 18
Preliminary Start-Up ........................................... 20
Service Information ............................................ 20
Operational Checklist ................................... 20
Filter Installation and Replacement .............. 20
Filter Removal .............................................. 20
Filter Replacement ........................................ 22
Dust Disposal ............................................... 22
Compressed Air Components ....................... 22
Optional Equipment ........................................... 24
Power Pack ................................................... 24
Side Mount Power Pack ................................ 26
55-Gallon Drum Pack ................................... 28
Magnehelic®Gauge ...................................... 30
Photohelic®Gauge ........................................ 32
Delta P Control............................................. 34
Delta P Plus Control ..................................... 35
Transition and Rotary Valve ......................... 36
Damper and Silencer, TBI ............................. 37
Plenum Silencer, TRB .................................... 38
Abrasion-Resistant Inlet Collar ..................... 38
Platforms and Ladders .................................. 39
Cold Climate Kit ........................................... 40
Explosion Vents ............................................ 41
Sprinkler Installation .................................... 41
Troubleshooting ................................................. 42
Service Notes ...................................................... 46
Warranty ............................................................ 48

Donaldson Company, Inc.
4
Description
The Downflo II dust collector is a continuous-duty,
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. Each
standard module is two or three filter rows wide by
two, three, or four rows high by two filters deep.
Designed to increase the versatility of the unit,
standard options include top or front inlets, filter
access covers, Bag Out, cold climate kits, steep-slope
ledge-free hoppers, trough hoppers, and stationary
service platforms.
Purpose and Intended Use
Downflo II collectors are widely used on nuisance
dust where the load to the collector is less than two
grains per cubic foot. Some typical applications
include abrasive blasting, grinding, mixing,
blending, processing, pan coating, powder paint
applications, sand handling, welding, and
machining. Each application is different and
selecting the correct filter cartridge for the
application and type of dust collected is important.
For all ambient, extremely fine, and non-fibrous
dust, use Ultra Web®filter cartridges which offer
high efficiency and performance on fine
particulate.
For fibrous dust, use a cartridge with an open-
pleat design, such as Fibra-Web®.
Operations involving high temperature and high
humidity may require special attention.
Temperature, moisture content, and chemistry
issues may require custom collector design.
Appropriate cartridge options are available from
Donaldson Torit.
Hygroscopic dust such as fertilizer, salt, and
sugar should be handled under a controlled, low
humidity environment. Contact Donaldson Torit
for filter cartridge selection.
Flammable or explosive dust may require
custom collector design options and special
cartridges. Contact Donaldson Torit for design
assistance.
Applications with high hydrocarbon or high oil
content may require special treatment or filter
media.
CAUTION!
Misuse or modification of this
equipment may result in personal injury.
Do not misuse or modify.

Downflo II, Model DFT 2-8 through 4-128
5
All Units ( per IBC 2003 Specifications):
Wind ........................................ 90 MPH Exposure C
Seismic Spectral Acceleration, Ss............................................ 1.5
Seismic Spectral Acceleration, S1........................................... 0.6
Importance Factor, 1 ............................................ 1.0
Ground Snow Load ............................... Pg = 40 PSF
Compressed air, psi ........................................90-100
Housing rating, "wg ..........................................+-20
Power, valves and controls .... 120-Volt AC, 50/60 Hz
Rating and Specification Information
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Donaldson Company, Inc.
6
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 cartridges to the clean-air
plenum and discharges through the clean-air outlet.
Filter cleaning is completed using pulse-jet
technology. A solenoid and diaphragm valve aligned
to each row of filters provides the pulse cleaning.
The cleaning sequence starts at the top filter row
and continues down through each row. Remove,
inspect, or change the cartridges from outside the
unit by removing the filter access cover and sliding
the filters out.
Unit Operation
CAUTION!
Combustible materials such as buffing
lint, paper, wood, aluminum or steel
dust, weld fume, and flammable
solvents represent fire or explosion
hazards.
Use special care when selecting and
operating all collection equipment
when combustible materials are
present to protect workers and
property from damage due to fire
and/or explosion.
Consult and comply with all National and
Local Codes relating to fire or explosion, and
all other appropriate codes when determining
the location and operation of dust collection
equipment.
Donaldson Torit equipment is not equipped
with fire extinguishing or explosion protection
systems.
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Downflo II, Model DFT 2-8 through 4-128
7
Inspection on Arrival
1. Inspect unit on delivery.
2. Report any damage to the delivery carrier.
3. Request a written inspection report from the
Claims Inspector to substantiate claim.
4. File claims with the delivery carrier.
5. Compare unit received with description of
product ordered.
6. Report incomplete shipments to the delivery
carrier and your Donaldson Torit representative.
7. Remove crates and shipping straps. Remove
loose components and accessory packages before
lifting unit from truck.
Installation Codes and Procedures
1. Safe and efficient operation of the unit depends
on proper installation.
2. Authorities with jurisdiction should be consulted
before installing to verify local codes and
installation procedures. In the absence of such
codes, install unit according to the National
Electric Code, NFPA No. 70-latest edition.
3. A qualified installation and service agent must
complete installation and service of this
equipment.
CAUTION!
OSHA may have requirements regarding
recirculating filtered air in your facility.
Consult with the appropriate local
authorities to ensure compliance with all
codes regarding recirculating filtered air.
Installation
Site Selection, Grade-Mounted Units
1. The unit can be located on a reinforced concrete
foundation or rooftop.
2. Wind, seismic zone, and other live-load
conditions must be considered when selecting
the location for rooftop-mounted units.
Reference the Specification and Rating
Information.
3. Provide clearance from heat sources and
interference with utilities when selecting the
location for grade-mounted units. Reference the
Specification and Rating Information.
4. Portable units require no special installation
accommodations.
Note: Units with explosion vents are not
available in portable configurations.
Unit Location
1. When hazardous conditions or materials are
present, consult with local authorities for the
proper location of the collector.
2. Foundation or roof support must be sized to
accommodate the entire weight of the unit, plus
the weight of the collected material, piping, and
ductwork. Reference the Specification and
Rating Information.
3. Prepare the foundation in the selected location.
Install anchor bolts to extend a minimum of
1 3/4-inches above foundation unless otherwise
indicated on the Specification Control drawing.
4. Locate the collector to ensure the shortest and
straightest inlet- and outlet-duct length, easy
access to electrical and compressed-air
connections, and routine maintenance.
CAUTION!
Donaldson Torit equipment is not
designed to support site-installed ducts,
interconnecting piping, or electrical
services. All ducts, piping, or electrical
services supplied by others must be
adequately supported to prevent severe
personal injury and/or property damage.

Donaldson Company, Inc.
8
CAUTION!
Failure to lift the collector correctly
can result in severe personal injury or
property damage.
Use appropriate lifting equipment and
adopt all safety precautions needed for
moving and handling the equipment.
A crane or forklift is recommended for
unloading, assembly, and installation
of the collector.
Location must be clear of all
obstructions, such as utility lines or
roof overhang.
Electrical Wiring Rigging Instructions
Suggested Tools & Equipment
Clevis Pins and Clamps Lifting Slings
Crane or Forklift Pipe Sealant
Drift Pins Pipe Wrenches
Drill and Drill Bits Screwdrivers
End Wrenches Socket Wrenches
Large Crescent Wrench Spreader Bars
Hoisting Information
1. Use all lifting points provided.
2. Use clevis connectors, not hooks, on lifting
slings.
3. Use spreader bars to prevent damage to units
casing.
4. Check the Specification Control drawing for
weight and dimensions of the unit,
subassemblies, and components to ensure
adequate crane capacity.
5. Allow only qualified crane operators to lift the
equipment.
6. Refer to applicable OSHA regulations and local
codes when using cranes, forklifts, and other
lifting equipment.
7. Lift unit and accessories separately, and
assemble after unit is in place.
8. Use drift pins to align holes in section flanges
during assembly.
CAUTION!
Electrical installation must be
performed by a qualified electrician
and comply with all applicable
national and local codes.
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.
1. All electrical wiring and connections, including
electrical grounding, should be made in
accordance with the National Electric Code,
NFPA No. 70-latest edition.
2. Check local ordinances for additional
requirements that apply.
3. The appropriate wiring schematic and electrical
rating must be used. See units rating plate for
required voltage.
4. If the unit is not furnished with a factory-
mounted disconnect, an electric disconnect
switch having adequate amp capacity shall be
installed in accordance with Part IX, Article 430
of the National Electric Code, NFPA No. 70-
latest edition. Check units rating plate for
voltage and amperage ratings.
5. Refer to the wiring diagram for the number of
wires required for main power wiring and
remote wiring.

Downflo II, Model DFT 2-8 through 4-128
9
Typical Installation
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Donaldson Company, Inc.
10
Module Assembly
CAUTION!
Failure to lift the collector correctly can
result in severe personal injury or
property damage.
Use appropriate lifting equipment and
adopt all safety precautions needed for
moving and handling the equipment.
Standard Equipment
Standard equipment consists of modules, inlet
deflectors, yokes, filters, hoppers, and legs. Single-
module through six-module units are delivered with
the inlet deflectors, yokes, and filters factory
installed.
Field Assembly
Field assembly of modules may be required due to
truck capacity, crane capacity, or specific customer
requirements. A detailed instruction drawing,
shipped with each module, provides specific
assembly and lifting instructions.
If unit has been shipped with fully-assembled
modules, skip to Hopper Installation.
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