Key facts
- Brand
- 3M
- Model
- Overhead Air Ionizer 991
- Category
- Industrial Supply
- Documents
- 2
- Languages
- EN
- Last added
- 2012-04-09
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3M Overhead Air Ionizer 991 User Manual
The 3M Overhead Air Ionizer 991 neutralizes static charge on work surfaces in electronics manufacturing environments. It features three fans, bi‑color LED status, and an auto‑clean system to keep emitter points clear.
The manual covers safety guidelines, installation steps, power connections, operation procedures, maintenance tasks, specifications, and service information. It also provides details on daisy‑chaining multiple units and troubleshooting fault indicators.
3M Overhead Air Ionizer 991 specifications
| Length | 44 inches (111.8 cm) |
|---|---|
| Fan Speeds | High and low (OFF) |
| Protective Fan Filters | Open‑cell foam filters |
| Indicator LED | Bi‑Color Red/Green |
| Auto‑Clean System | Brush mechanism on each fan |
| Current Rating per Unit | 0.4 A |
| Alarm Output Jack Rating | 1.0 A, 30 V |
| Inter‑unit Power Cord | #18 AWG 3‑conductor, max 12 inches |
All 3M Overhead Air Ionizer 991 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
Can the 3M Overhead Air Ionizer 991 be used outdoors?
No, the ionizer is intended for indoor use only and must not be used outdoors.
What does a red LED indicate on the ionizer?
A red bi‑color LED signals a fault condition in the high‑voltage power circuitry.
How many Overhead Air Ionizer 991 units can be daisy‑chained together?
Up to ten units can be daisy‑chained, using #18 AWG (0.8 mm²) 3‑conductor cable between each unit.
What cleaning solution should be used for the emitter points?
A solution of 50 % deionized water and 50 % isopropanol (IPA) is recommended.