3M 991A User Manual
3M™ Overhead Ionizing Blower 991A
User’s Manual
January 2014
78-9101-8683-8
Important Safety Information
Carefully read the following safety information before installing or operating the equipment. Failure to follow these safety
warnings could result in damage to your ionization system and/or voiding the product warranty.
• This unit is supplied with a 3-prong grounding plug, which must be inserted in an appropriate, properly wired, and
grounded receptacle. Do not defeat the electrical ground, grounding and proper wiring are required for proper operation.
• Keep the unit dry. Do not operate the ionizer in a flammable, volatile or explosive atmosphere.
• Do not insert objects through the unit’s intake or outlet grilles. Damage to the ionizer and/or personal injury may result.
• Do not ground or make electrical connections of any kind to the unit’s metal fan guards located on the intake and output.
• A factory-qualified service technician must perform component service and repairs. Please contact 3M Customer Service
for information.
Contents
1.0 Description ...................................................................................................................................................................................1
1.1 3M™ Overhead Ionizing Blower 991A ........................................................................................................................................2
1.2 Features .........................................................................................................................................................................................3
2.0 Installation .................................................................................................................................................................................... 5
2.1 Unpacking .....................................................................................................................................................................................6
2.2 Installing ....................................................................................................................................................................................... 7
2.3 Mounting ......................................................................................................................................................................................8
2.4 Electrical ....................................................................................................................................................................................... 9
2.5 Optional Air Filter ......................................................................................................................................................................10
3.0 Operation ................................................................................................................................................................................... 11
3.1 Adjustments ................................................................................................................................................................................ 12
3.2 Performance ................................................................................................................................................................................13
3.3 Troubleshooting ..........................................................................................................................................................................14
4.0 Maintenance ...............................................................................................................................................................................15
4.1 General Maintenance..................................................................................................................................................................16
4.2 Emitter Cleaning .........................................................................................................................................................................17
4.3 Air Inlet & Outlet Cleaning ........................................................................................................................................................18
4.4 Optional Air Filter Cleaning.......................................................................................................................................................19
4.5 Ion Output Check .......................................................................................................................................................................20
4.6 Ion Balance Check .....................................................................................................................................................................21
4.7 Calibration .................................................................................................................................................................................. 22
4.8 Task Light Replacement ............................................................................................................................................................ 23
5.0 Specications .............................................................................................................................................................................. 25
6.0 Warranty & Service ....................................................................................................................................................................29
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1.0 Description
1.1 3M™ Overhead Ionizing Blower 991A
The 3M Overhead Ionizing Blower 991A is designed for use with sensitive electronic components where electrostatic
discharge (ESD) is a problem. The Overhead Ionizing Blower 991A provides fast static charge decay efficiency over an
entire work surface area. Equipped with task lighting, an ionization indicator light, and an integrated heater, it offers userfriendly operation while helping protect even the most sensitive components from ESD damage.
• Rapidly neutralizes static charges
• Covers an extended area with ionized air
• Inherently balanced to 0 ±5 V
• Integrated heater and task lights
• Ionization indicator light
• AC technology for stable performance
• Built-in emitter cleaner for easy maintenance
1.2 Features
The Overhead Ionizing Blower 991A produces an air flow that is rich in positive and negative ions. Directing the air flow
on an object that has a static electricity charge will neutralize the charge. If the object has a positive static charge, it will
draw negative ions from the air flow. If the object has a negative static charge, it will draw positive ions from the air flow.
The ions are attracted to the oppositely charged object and will neutralize the electrostatic charge on the object.
The Overhead Ionizing Blower 991A features both inherent self balance technology and a built-in emitter point cleaner.
The Overhead Ionizing Blower 991A operates on AC technology to provide stable balance performance over long periods
of use. The Overhead Ionizing Blower 991A provides fast charge decay directly under the unit for targeted work surface
coverage. The Overhead Ionizing Blower 991A requires very little maintenance to ensure electrostatic charge is controlled
within the work surface area.
2.0 Installation
2.1 Unpacking
Note: Prior to installing the Overhead Ionizing Blower 991A, the compact fluorescent bulbs must be installed. The bulbs
are placed inside the packaging material to prevent breakage during shipment. Remove both (2” x 11”) lamp access
panels on rear of unit with a ¼” nut driver or flat blade screwdriver. Unpack the bulbs and install by inserting the bulb
into the socket and press until it “clicks” into place. Replace the lamp access panels.
Carefully remove the equipment from the carton and inspect contents. Empty the carton to insure that small parts are not
discarded. If any damage has occurred during shipment, notify the local carrier at once. Contact the 3M product distributor
if replacement or the product is necessary.
2.2 Installing
The Overhead Ionizing Blower 991A should be located 18 to 30 inches above the work surface with center fan directly
above the critical area. There should be no crossflow of air between unit and the work surface. Drafts from air conditioning
and heating air outlets can affect ionization performance.
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