Operation and Service Instructions
DC3100 Dust Collector
Issue Date: Sept 2007
Silencer
Control Panel
Hopper
Pail Pack
Comco, Inc.
2151 N. Lincoln Street
Burbank, California 91504
USA
Phone: 818-841-5500
Fax: 818-955-8365
Web Site: www.COMCOinc.com
Book P/N DC3115
File: DC3100man.doc
DC3100 PRODUCTION DUST COLLECTOR SPECIFICATIONS
Application:
Dry blasting media
Designed Air Flow:
Maximum 1,600 CFM @ 7” external static pressure
Filter Area:
570 square feet
Air-to-Media Ratio:
2.5 : 1
Filter Cartridge Material:
Ultra-Web® II NL
Filter Quantity:
3
Standard Housing
Unit is constructed of 12 gauge steel rated at -20" wg.
Finish
Exterior and interior surfaces are covered with an electro-statically applied powder coat
TGIC polyester textured finish (2-mil dry film thickness). The finish passes a 350-hour salt
spray corrosion performance test. The color is blue.
Dust Laden Air Inlet
Standard top inlet is 8 inches in diameter and creates a general downward airflow pattern in
the filter section to optimize filter performance. Each filter column is protected from direct dust
impingement by an internal baffle plate.
Ultra-Web II NL Filters
The media in each filter cartridge incorporates a durable outer layer of EON nanofibers that
intercepts even the smallest particles at the surface of the media. Independent laboratory
testing has determined that Ultra-Web II cartridges have start-up efficiencies of 99.9% on 0.2-2
micron dust particles, and operating efficiencies of 99.999% on 0.5-micron particulate. The
tests were conducted using procedures defined in ASHRAE report #RP-531 and by BIA
European Institute for Occupational Safety.
The Ultra-Web II NL cartridge features an open design without outer liner to improve pulsecleaning effectiveness on very fine and agglomerative dusts. Each cartridge contains 190
square feet of media.
Comco Inc.
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Filter Cleaning
Periodic pulses of compressed air managed by high performance air control components clean
the filter cartridges. Pulsed air back flushes in the opposite direction of normal airflow and into
a patented venturi style cleaning system. The proprietary cleaning system delivers maximum
cleaning energy and provides uniform pulse pressure for superior cleaning effectiveness. The
cleaning system is fully enclosed for quiet operation.
Cleaning Controls
The proprietary solid-state Delta P Control Board, featuring a digital read-out display, controls
the on-demand, continuous duty filter cleaning by measuring and controlling between high and
low pressure set points. It provides filter restriction and cleaning control; starting and stopping
the cleaning process at user selected set points. No battery backup required.
For standard housing construction, control components are factory mounted internally to the
collector, pre-wired, and are rated NEMA 12.
Required Services
The collector requires 6 scfm of maximum 60 psig, clean, dry compressed air based on a 10
second pulse interval. Timer requires 110 VAC. Compressed air to be supplied by customer.
Discharge Hopper
Discharge hopper is fabricated of 12-gauge steel and features a ledge-free internal design.
Hopper angles are at 46° and 52° degrees. Top flange is rectangle and bottom discharge
flange is a 7" square opening, which attaches to a 10 -gallon dust container with gate.
Support Leg Structure
Support leg structure provides 19” clearance between the hopper discharge flange and the
base plate.
Fan
High performance backward inclined airfoil fan is mounted on the clean air side and at the
base of the unit for maximum noise control. Fan wheel consists of fiberglass reinforced
composite material. Motor starter is provided.
Unit performance: 1,500 cfm @ 7” wg external static pressure with clean filters.
Motor
5 Hp, 3,450RPM, 230/460 V, 60 Hz, 3 phase, TEFC Motor is directly coupled to fan and wired
to control box located inside of clean air plenum. Cord /plug not included.
Comco Inc.
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Exhaust Silencer
Exhaust silencer is integral to unit and is supplied at all times for highest fan noise control.
Damper
Damper is of parallel blade construction with manual handle and locking quadrant, and is
supplied at all times for maximum airflow control.
Noise Level
The standard 5 hp unlined fan plenum delivers an overall average sound pressure level of 80
dB (A) at an operator position of 1.5 m high and 1 m from source, which lowers to a
hemispherical reading of 68 dB (A) at a 4 m radius from the source. Pulse cleaning
accelerates noise level for short spikes to approximately 92 dB (A) at operator level. All sound
measurements were taken in a hemianachoic chamber and under free field conditions and do
not reflect the influences of actual operating environments.
Shipping Weight
1,250 pounds (approximate).
PLEASE NOTE:
Collector will ship completely assembled. Some field assembly is required if accessories are
purchased. Price does not include freight costs, unit installation, taxes, electrical connections,
ducting or plumbing for the air supply.
Comco Inc.
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NORMAL OPERATIONS
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DC3100 DUST COLLECTOR INSTALLATION AND SETUP
Introduction
Your DC3100 Dust Collector has been setup in the following configuration:
 Blower Motor voltage as indicated on serial number plate
 ΔP Control Panel (pre-wired for 120V/60Hz)
 Front Panel Blower Control switches
 5-Gallon Pail Pack without Gate
 After Shift Cleaner
Installation
Prior to installing your new DC3100 Dust Collector, thoroughly read the Installation and
Operation Manual supplied with your dust collector. The dust collector must be installed in
accordance with local building codes and precautions reviewed in the manual. All electrical
wiring and connections must be made by a qualified electrician using the wiring and
connection information found in the Installation and Operation Manual as a guide.
If the dust collector is to be installed outside, protection from weather elements must be
considered. Contact Comco Technical Support for additional information and suggestions.
Air Supply Connections and Requirements:
A compressed air supply must be connected to the dust collector for the pulse cleaning
function. A clean, oil free supply of air at 60 psi, 2 scfm is required. A regulator and filter
separator should be installed in the line in front of the dust collector. It is also recommend that
a shut off gate or valve be installed in the line to facilitate servicing the unit.
AIR PRESSURE
REGULATOR
SET AT 90 – 100 psi
TO DUST COLLECTOR
AIR INLET
DIRECTION OF
AIR FLOW
AIR SHUT OFF
FILTER/SEPARATOR
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Setup
Air Pressure
Set the compressed air source connected to bottom of the collector at 60 psi.
Electrical Power
ELECTRICAL
INTERLOCK SWITCH
P CONTROL PANEL
BLOWER CONTROL
SWITCHES
1. Turn on Electrical power to the unit. Be sure the front panel electrical interlock switch is in
its ON position.
Note: The door must be closed and secured in order to turn the interlock switch.
2. Display on the Control Panel should light.
Note: If the pressure differential displays a negative value, the pressure tubes from the
Panel circuit board to the cabinet must be reversed. See reversing the pressure sensor
tubes to the ΔP Control Panel.
3. Turn on the blower by depressing the Blower Start switch on the Control Panel.
Comco Inc.
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ΔP Control Panel Settings
The filters are monitored for media build up by measuring the pressure drop across the filters.
The high and low set points determine at what point the pulse filter cleaning is to start and
stop. When the pressure drop reaches the high point setting the air purge pulses will start and
continue at the preset pulse duration and rate until the pressure drop reaches the low point
setting. There are several factors to consider when setting these points. In general, setting
points shown below will be suitable for most applications:
Low Set: 1.5
High Set: 2.5
The ΔP Control also has a red alarm light that lights when a set alarm point is reached. This
alarm indicates that the filters are not cleaning and maintenance of the filters is required or a
system problem exits which is causing the filters to clog. A recommended set point for the
alarm is:
Alarm Set: 4.5
To set the points:
1) Turn ON the Dust Collector.
2) Press and hold one of the set point keys.
3) While holding down the key, use the UP and Down arrow keys
to adjust that setting.
4) Repeat above procedure to adjust remaining settings.
Note: If display indicates a negative differential pressure value, the
pressure sensor tubes need to be reversed. See “Reversing
the pressure sensor tubes to the ΔP Control Panel” below.
Δ P Control Calibration
When the unit is at rest the display should read 0.0. If not, the ΔP Control will need to be reset
as follows:
1) Power the ΔP Control for a minimum of 30 minutes to stabilize the operating
temperature.
2) Remove power from the Control so that the display shuts down. To turn off
power rotate the interlock switch located on the control panel to the OFF position.
3) Press and hold the Low Set, High Set and Alarm Set keys while reapplying
power to the Control. Continue to hold these keys while the Control goes
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through a power-up routine. This is indicated by sequentially displaying “8” in
each digit, and then displaying “0.0”.
4) Release all three keys. The new calibration automatically stores in memory.
Downtime Clean
The Downtime Clean function will require setting the cleaning cycle. This function is designed
to cycle air pulses through the 3 filters for a set period of time after the dust collector is shut
down. This cleaning process yields a very complete cleaning of the four filter elements at the
end of the operating shift. Several factors determine the optimum cycle time. In general the
set time shown below should be sufficient.
DOWNTIME CLEANING:
Setting - Small Selector Dial:
Setting - Large Selector Dial:
ON
6-60 min
1 = 1/10 of 60 min or 6 Min
To turn ON and set cleaning cycle time:
1) Turn OFF dust collector blower.
2) Turn electrical interlock switch on front panel to the OFF position.
3) Unscrew the 2 socket screws on the right side of the front panel.
4) Open front panel and locate After Shift Clean controls.
5) Small selector dial – Set at 6-60 min range.
6) Large selector dial - Set at 1 (1/10 of 60 min).
7) Set Down Time Cleaning switch to ON*.
8) Close and secure front panel.
9) Turn ON dust collector blower.
* It is recommended that the Down Time Cleaning be turned OFF for the first few months until
the filter elements have a light powder build up on them. The filters will work better after they
have been used or broken in.
Comco Inc.
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Issue Date: Sept 2007
Replacement Filters for the DC3100 Dust Collector
Refer to the Torit Installation and Operation Manual* for filter replacement
instructions.
Filters:
Comco Part No.: DC3120
Torit Part No.:
P191889-461-436
For additional repair and service parts refer to the:
Torit Replacement Parts List included in this binder
For Technical Assistance Call:
Comco Technical Support
Comco’s Technical Support Department is available Monday through Friday from
6:30 am to 4:30pm, Pacific Time, to help you with any questions you may have
with your Dust Collector or with any other micro-abrasive blasting issues.
The telephone and fax numbers are:
Phone:
-or-
1-800-796-6626
1-818-841-5500
Fax:
1-818-955-8365
You may also e-mail your questions to:
[email protected]
Comco maintains an extensive library of technical bulletins that encompass a
variety of micro-abrasive blasting subjects and application information. These
are available by contacting Customer Service at one of the above numbers or by
viewing our website – www.COMCOinc.com – to download an electronic copy.
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