Cold Jet AeRO 75 User manual

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Operator Manual
AeRO 75 Series

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This manual illustrates the safety, operation, and maintenance features of the Cold
Jet AeRO 75 Series.
The build and revision level is located on the machine’s data plate.
All Machine diagrams are located on the inside of the electrical cover plate.
The design contained in this manual was originated by and is the exclusive property
of Cold Jet, LLC. It is not to be used in any way detrimental to the interests of
Cold Jet, LLC.
No part of this design or manual may be reproduced, transmitted, stored in a
retrieval system, or translated into any other language or computer language, in
whole or in part, in any form or by any means, whether electronic, mechanical,
magnetic, optical, manual or other, without the express written consent of Cold Jet,
LLC.
Special Notes
All information contained within this manual, or information derived from
exposure to the technology or equipment supplied by Cold Jet, LLC remains
“CONFIDENTIAL” between Cold Jet, LLC and the purchaser or authorized user.
Any unauthorized transfer of information to any person or company not in the
direct employ of Cold Jet, LLC, or not in the direct employ of the purchaser or the
authorized user, is strictly prohibited.
Voltage: 100-130 Volts AC
Model No.: AeRO 75
Control No./
Diagram: 2A0148-G1
Voltage: 200-240 Volts AC
Model No.: AeRO 75
Control No./
Diagram: 2A0148-G1
Voltage: 100-130 Volts AC
Model No.: AeRO 75-DX
Control No./
Diagram: 2A0148-G2
Voltage: 200-240 Volts AC
Model No.: AeRO 75-DX
Control No./
Diagram: 2A0148-G2
Copyright 2007 by
Cold Jet
All Rights Reserved
Printed in U.S.A.
P/N: 2W0245-C

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Table of Contents
Safety
General Safety Precautions...................................................................6
Electrostatic Discharge..........................................................................7
Carbon Dioxide .....................................................................................8
Blast Hose Safety Precautions ..............................................................9
Finger Guard Precautions ......................................................................10
Component Guide
Introducing the Cold Jet AeRO 75 & AeRO 75-DX ................................15
Front View.............................................................................................16
Back View .............................................................................................18
Control Panel ........................................................................................20
Hopper ..................................................................................................21
Regulator Configuration.........................................................................25
Coalescing/Particulate Air Filter ............................................................27
Blast Applicator .....................................................................................28
Operation
Starting Up............................................................................................32
Blasting .................................................................................................34
Shutting Down ......................................................................................35
Maintenance
Troubleshooting.....................................................................................38
Daily/Weekly Maintenance....................................................................39
Monthly/Biannual Maintenance .............................................................41
Appendix
Specifications........................................................................................44
Tips .......................................................................................................45
Blast Air Quality.....................................................................................46
Cold Jet Services..................................................................................48
Machine Symbols..................................................................................49
Warranty ...............................................................................................51

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Safety

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Safety
•NEVER OPERATE the unit without first reading the Operator Manual.
•NEVER EXPOSE bare skin to CO2ice.
•ALWAYS WEAR safety glasses, gloves, 32+NRR ear plugs & ear
muffs.
•EVERYONE in the blast area must comply with all safety requirements.
•NEVER POINT the nozzle at anyone and ALWAYS exercise extreme
caution when people are in the blast area.
•NEVER use a wire tie to hold the applicator trigger in the ON position.
Doing so can damage it and void its warranty.
•NEVER USE the blasting unit for anything except the intended usage.
•ONLY USE dry ice pellets as the blasting media.
•NEVER OPERATE in a confined space without an approved ventilation
system and a carbon dioxide monitoring device is recommended.
•NEVER mask the ventilation holes.
•NEVER ALLOW UNTRAINED PERSONNEL to operate the blasting
unit.
•NEVER OPERATE a damaged blasting unit.
•ALWAYS turn the main power OFF and remove the applicator control
cable BEFORE removing the blast hose.
•NEVER exceed recommended hose or blasting unit pressure levels.
•ALWAYS ground the material being cleaned.
•ALWAYS ENSURE that hoses are securely attached.
•KEEP hoses and power cord out of forklift traffic areas.
•CHECK hoses and cables for nicks and gouges.
•DO NOT kink the blast hose before or during operation.
•NEVER DISCONNECT the air supply hose without first shutting off the
source air.
•ONLY COLD JET TRAINED service technicians are allowed to work on
the unit’s electrical components.
•DO NOT operate equipment with electrical parts exposed, jumpered or
rendered inoperable.
•ALWAYS FOLLOW THE GUIDELINES of the governing codes of your
local/national body as a minimum standard for ensuring safety.
•Please refer to Carbon Dioxide (CO2) MSDS sheet for all safety
precautions. (MSDS sheet available upon request.)
General Safety
Precautions

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Electrostatic Discharge
Safety Precautions
Safety
Electrostatic discharge can be hazardous to the operator and the
equipment. The static charge of CO2varies with the amount of ice and
humidity present. Follow these instructions to assure safe operation while
blasting.
A) The power outlet must have a good ground
This is critical for electrostatic dissipation. If the ground is not
connected a charge will build up on the unit or the applicator. As a
secondary backup the unit's electrically conductive wheels will help
bleed off any additional static charge.
B) The blasting unit’s static ground cable must be attached to the
target surface
If a target is on a non-grounded surface it will build up an electrostatic
charge, which could injure the operator or damage the equipment.
Wrap or clip the static ground cable to the target to dissipate the
charge. Metal framing, that holds the target in place, can be used but
the target and frame must be electrically connected. Use a conductivity
tester for confirmation.
C) Know your environment
Electrostatic buildup changes as humidity levels change and will vary
by location. Electrostatic discharge is higher at low humidity levels and
occurs most often during cold weather.

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Carbon Dioxide (CO2) is a naturally occurring gas and a normal by-product
of breathing.
However caution MUST be exercised!
•This unit utilizes Carbon Dioxide (Dry Ice) as a blast media.
•Dry Ice is very cold -110°F (-79°C) and may freeze skin instantly.
•CO2is a heavy gas, which means it will settle to the ground.
•Always ventilate when blasting.
•When blasting in a confined space, use of a Carbon Dioxide monitoring
device is recommended.
•CO2is nontoxic, non-corrosive, non-conductive and is approved by
the FDA and USDA. While exposure to CO2gas is not harmful in low
concentrations, CAUTION must be exercised when using any material
that can DISPLACE OXYGEN.
WARNING
This product utilizes Carbon Dioxide (CO2) as a
blast media, EXTREMELY COLD,
CAUSES SEVERE BURNS. CO2can freeze
the skin instantly. Always use protective
clothing (Thermal Gloves) and eye
protection when handling CO2solids or
when using the blasting unit.
Carbon Dioxide
Safety Precautions
Safety
WARNING
INCREASED LEVELS OF CO2WHEN
BLASTING IN A CONFINED SPACE CAN
DISPLACE BREATHABLE OXYGEN
CREATING A RISK OF SERIOUS INJURY
OR DEATH BY SUFFOCATION, THEREFORE
USE OF A CARBON DIOXIDE MONITORING
DEVICE IS RECOMMENDED WHEN USING
IN A CONFINED SPACE.

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•ALWAYS tighten hose fittings with a wrench.
•NEVER USE hoses above the recommended working pressure. (see
table)
Blast Hose Safety Precautions
Part Number Description Working
Pressure
Machine
2N0177 3/4" Urebrade Hose 140 psi
(9.65 bar)
AeRO 75
AeRO 75-DX
(Low Pressure)
2N0178 1" Urebrade Hose 140 psi
(9.65 bar)
AeRO 75
2N0179 1-1/4" Urebrade
Hose
140 psi
(9.65 bar)
AeRO 75
AeRO 75-DX
(Low Pressure)
2N0180 1" Kevlar Hose 300 psi
(20 bar)
AeRO 75-DX
(High Pressure)
2N0181 1-1/4" Kevlar Hose 300 psi
(20 bar)
AeRO 75-DX
(High Pressure)
Safety
•NEVER DISCONNECT the supply air hose without first shutting off the
source air.
•BLEED the compressed air before disconnecting the hoses.
•NEVER OPERATE the equipment if the hose whip check is not
installed.

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The finger guard on the Cold Jet AeRO 75 series protects from a potential
personal injury site located inside the machine. The guard, over the air
exhaust port, must remain installed at all times to serve its function.
Finger Guard
Finger Guard Precautions
Safety

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IMPORTANT
ALWAYS MAKE SURE THE HOPPER IS
EMPTY AND BLAST WITH AIR ONLY,
FOR 1 MIN. WHEN SHUTTING DOWN
LONGER THAN 15 MIN.
FAILURE TO DO SO MAY RESULT IN
FEEDER AND/OR NOZZLE FREEZE-UP.
•For optimal performance it is recommended that the air supply dew
point be -40oF (-40oC) or lower.
•For optimal performance make sure the air is clean and free from oil
and grit.
•If needed, use an after-cooler and an air dryer with air filtration,
to obtain desired air quality and dew point (air drying and filtration
equipment may be purchased from Cold Jet).
•If you intend to provide your own air drying and filtration equipment,
consult Cold Jet Customer Support for assistance in selecting the
correct models.
•The length of blast time at higher dew points depends on relative
humidity, temperature and excessive condensation in the hopper and
on the pellets.
•At EVERY blasting start-up ALWAYS purge the Cold Jet AeRO 75 &
75-DX with compressed air before adding pellets to the hopper.
•ALWAYS shut the fill lid to avoid foreign objects falling in.
•ALWAYS avoid bad ice.
Before You Begin
Safety

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Component
Guide

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Component Guide
•The Cold Jet AeRO 75 & 75-DX are portable units providing easy
access for difficult to reach cleaning applications.
•The Cold Jet AeRO 75 & 75-DX use dry ice pellets from either an on-
site pelletizer or shipped in from a distribution center.
•The blast machine requires a source of compressed air and standard
electrical power for operation.
•The blast machine contains an innovative, patented feeder and control
system to maintain consistent pellet flow.
•During operation the feeder transfers the pellets from the hopper to
a stream of compressed air at a rate determined by the feed control
system.
•After exiting the nozzle and striking the surface, the CO2pellets
sublimate into the atmosphere.
•The only residue left behind is the blasted contaminant.
•The Cold Jet AeRO 75 & 75-DX have the capacity to hold 75 lbs (34
kg) of CO2pellets.
•The delivery is variable from 0 - 7 lbs/min (0 - 3.2 kg/min).
•The Cold Jet AeRO 75 can blast from 30 - 140 psi (2 - 9.66 bar) and
the AeRO 75-DX can blast from 30 - 300 psi (2 - 20 bar). Below 60
psi (4 bar) a regulator is required.
Introducing the AeRO 75 &
AeRO 75-DX

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Blast Cable
Connector
Static Ground
Cable
Blast Hose
Connector
Control Panel
Fork-Lift
Tubes
Nozzle Hangers
AeRO 75 Front View
Component Guide
Electrical
Enclosure
(SERVICE ONLY)

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Blast Cable
Connector
Static Ground
Cable
Blast Hose
Connector
AeRO 75-DX Front View
Electrical
Enclosure
(SERVICE ONLY)
Control Panel
Fork-Lift
Tubes
Nozzle Hangers
Component Guide

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AeRO 75 Back View
Bleed
Valve
Air Supply Hose
Connect
AC Power
Cord
Whip
Check
Power Cord
Hanger
Hose
Hangers
Component Guide

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Bleed
Valve
Air Supply Hose
Connect
AC Power
Cord
Whip
Check
Power Cord
Hanger
Hose
Hangers
Hopper Release
Handle
AeRO 75-DX Back View
Component Guide

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Component Guide
Power
Indicator
Power
Switch Feed Rate
E-Stop
Hour
Meter
Pressure
Gauge
Machine Active light - When light
is on machine is ready to blast
(the hopper access door being open
is an example of the light being off).
Control Panel