3M 256-02-01 - User Manual

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Portable Compressed Air Filter and

Regulator Panel 256-02-01, with

Carbon Monoxide Monitor

User Instructions

(Keep these User Instructions for reference)

3M 256-02-00 Portable Compressed Air Filter Regulator Panel

3M 256-02-01 Portable Compressed Air Filter Regulator Panel

netzerotools.com

Questions and Answers

O
osbornemauriceAug 2, 2025
What to do if I smell contaminants while using my 3M 256-02-01?
- J
  Jessica SuttonAug 2, 2025
  If you smell or taste contaminants or experience irritation while using your 3M Respiratory Product, leave the work area immediately and contact your supervisor. Do not continue using the product until the cause is identified and corrected. The filter cartridges may be used up, or there could be misuse, improper assembly, or a malfunction of the equipment. Replace the filter cartridges.
K
Kimberly YoderAug 17, 2025
Why is the airflow too low in my 3M Respiratory Product?
- J
  Jason LeblancAug 17, 2025
  Low airflow in your 3M Respiratory Product can be caused by a clogged particulate filter or pressure that is too low. Replace all filter cartridges to address a clogged filter. If the pressure is too low, raise the inlet pressure or adjust the regulator.

Summary

General Safety Information

Critical Safety Warnings

Details crucial warnings, regulations, and conditions for safe operation.

Operating Precautions and Prohibitions

Covers safe practices, prohibited uses, emergency actions, and equipment handling.

Air Quality and CO Monitoring Considerations

Setup Procedures

Mounting and Air Supply Requirements

Guides on wall mounting and specifying air supply line and quality criteria.

Installation Distance and CO Monitor Operation

Operating Instructions

General Operating Guidelines

Provides general instructions for using the 3M Portable Compressed Air Filter and Regulator Panel.

Critical Operational Safety

Emphasizes safety rules, user understanding, and emergency procedures during operation.

CO Monitor Setup and Calibration

Guides on installing batteries, testing, and calibrating the carbon monoxide monitor.

System Purge and Metering Adjustment

Details system purging, hose connection, and air sample metering valve adjustment.

Replacement Part Instructions

Prefilter Replacement (Stages 1 & 2)

Provides step-by-step instructions for replacing the first and second stage prefilter elements.

Air Scrubber Replacement (Stages 3 & 4)

Summary

General Safety Information

Critical Safety Warnings

Details crucial warnings, regulations, and conditions for safe operation.

Operating Precautions and Prohibitions

Covers safe practices, prohibited uses, emergency actions, and equipment handling.

Air Quality and CO Monitoring Considerations

Setup Procedures

Mounting and Air Supply Requirements

Guides on wall mounting and specifying air supply line and quality criteria.

Installation Distance and CO Monitor Operation

Operating Instructions

General Operating Guidelines

Provides general instructions for using the 3M Portable Compressed Air Filter and Regulator Panel.

Critical Operational Safety

Emphasizes safety rules, user understanding, and emergency procedures during operation.

CO Monitor Setup and Calibration

Guides on installing batteries, testing, and calibrating the carbon monoxide monitor.

System Purge and Metering Adjustment

Details system purging, hose connection, and air sample metering valve adjustment.

Replacement Part Instructions

Prefilter Replacement (Stages 1 & 2)

Provides step-by-step instructions for replacing the first and second stage prefilter elements.

Air Scrubber Replacement (Stages 3 & 4)

The 3M™ Portable Compressed Air Filter and Regulator Panel 256-02-01, with Carbon Monoxide (CO) Monitor, is a specialized device designed to filter and regulate compressed air for use with supplied air respiratory protection systems. It is crucial to note that this panel does not remove carbon monoxide from the air. The unit is intended to provide Grade D breathing air, as specified by the Compressed Gas Association Commodity Specification G-7.1-1997 in the United States, and CSA standard Z180.1 in Canada.

Function Description

The panel operates as a four-stage filtration system, ensuring that the compressed air supplied to respirators is free from various contaminants.

First Stage (Prefilter B): Air enters the system at the inlet (A) and passes through the first stage, which traps particulate matter 3.0 microns and larger.
Second Stage (Prefilter C): The air then moves to the second stage, where it traps particulate matter larger than 0.3 microns and coalesces liquid aerosols with an efficiency rating of 99.97%. Liquid contaminants are collected in the lower chamber of the prefilter and expelled through an automatic float drain (D).
Third and Fourth Stages (E and F): These stages contain a bed of odor-absorbing activated charcoal to remove gaseous contaminants and odors.
Air Pressure Regulation (G): After filtration, the air passes through an air pressure regulator, which adjusts the pressure to the respirators.
Carbon Monoxide Monitoring (I): A sample of the filtered air is taken at (H) and continuously checked by the carbon monoxide monitor. The monitor digitally displays the CO concentration in ppm (parts per million) and features an audio and visual alarm that activates if CO levels exceed a preset level (10 ppm in the USA; 5 ppm in Canada).

Important Technical Specifications

Inlet Pressure (max.): 125 psig static (8.6 bar)
Inlet Pressure (recommended): 90-120 psig (6.2-8.3 bar)
Rated Air Flow (max.): 100 cfm (2832 lpm)
Outlet Pressure Range: 0-125 psig (0-8.6 bar)
Operating Temperature Range:
- Compressed air at inlet: 35-150°F (2-65°C)
- Ambient air: 0-110°F (-17-43°C)
Dimensions: 23.25"L x 20.75"W x 9"D (590 mm x 5276 mm x 229 mm)
Weight (includes monitor): 32 lb (14.5 kg)
Respirator Capacity: The panel is supplied with quick-disconnects for up to eight (8) supplied air respirators. The actual number depends on inlet pressure, airflow, and pressure requirements of the respiratory protection system.
Filter Cartridge Life Expectancy: 1 to 2 months (160-320 hours), depending on air quality and usage. All three filters should be changed simultaneously.
CO Monitor Alarm Levels: 10 ppm (USA) / 5 ppm (Canada).
CO Monitor Power: Two 9-volt batteries (30-35 hours continuous power) or optional 110-120 volt AC adapter. The intrinsic safety of the CO monitor is voided when remote alarm or AC adapter is used.

Usage Features

Continuous CO Monitoring: The integrated CO monitor provides real-time digital display of carbon monoxide levels, ensuring operator safety.
Audible and Visual Alarms: Alerts operators to high CO concentrations, low battery, or monitor malfunction.
Pressure Regulation: Allows adjustment of air pressure supplied to respirators to meet specific requirements.
Compatibility: Designed for use with 3M respirators, ensuring proper airflow and pressure within specified ranges.
Wall-Mountable: The unit can be wall-mounted directly in its case for convenient installation.
Industrial Interchange Connections: Features a 1/2" body size, 3/4" MPT industrial interchange plug at the inlet and eight 1/4" body size, 3/8" MPT industrial interchange quick-disconnects at the outlet.
Air Sample Metering Valve: An adjustment knob allows proper airflow to the CO monitor, indicated by a black floating ball within a green boxed area on the valve body.

Maintenance Features

Filter Replacement: Filter cartridges are replaceable, with an average life expectancy of 1-2 months. The manual provides detailed instructions for replacing the prefilter (first and second stages) and air scrubber (third and fourth stages) elements.
CO Monitor Calibration: The CO monitor requires calibration prior to initial use, every two weeks for the first month, and monthly thereafter if used continuously. For non-continuous use, calibrate before each use. Calibration instructions are provided in the CO monitor User Instructions.
Cleaning: Prefilter bowl assembly and aluminum tubes for the air scrubber stages can be cleaned with mild soap and water.
O-Ring Inspection: O-rings should be inspected for cuts or cracks during filter replacement to prevent air leakage.
Troubleshooting Guide: A table is provided to help identify possible causes and corrective actions for common issues like smelling contaminants, low airflow, or monitor malfunctions.
Record Keeping: Users are advised to record all periodic air quality checks, monitor calibration dates, filter cartridge change intervals, and any other service performed.
Storage: Before storage, check for moisture in the third and fourth stage filters. If present, dry the system and replace the filters. Dry filters can remain in the unit.

Warnings and Cautions

The panel does not remove carbon monoxide.
Misuse or failure to follow instructions can result in sickness or death.
Must comply with OSHA 29 CFR 1910.134 and CSA standard Z180.1.
Breathing air must meet Grade D specifications.
Do not use with oxygen-deficient air; the unit does not increase oxygen content.
Not for use in IDLH atmospheres unless with a back-up escape system (SCBA/SAR).
Never alter or modify the assembly.
Ensure proper sample airflow to the CO monitor for accurate readings.
Always turn off air supply and bleed pressure before disassembly.
The intrinsic safety of the CO monitor is voided if a remote alarm or 110-120V AC adapter is used.