MST RP050B-S1/2 Series User manual

SERVICE MANUAL
TWIN MODEL RP050B(__ )-S1/2
RESPIRATORY PROTECTOR®
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WARNING: Do not attempt to operate this equipment without first reading and
understanding these operating instructions. Suitability for use of this device lies solely with
user.
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06/08

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CONTENTS
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
GENERAL SAFETY WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
GENERAL PURIFICATION SYSTEM DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
GENERAL OPERATIONS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
CUSTOMER AIR SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
MST RESPIRATORY PROTECTOR
INITIAL INSTALLATION AND START - UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
MST RESPIRATORY PROTECTOR
GENERAL OPERATION AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
FILTER SET SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 13
RECORD KEEPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
PERFORMANCE CURVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
PART LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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SPECIFICATIONS
RESPIRATORY PROTECTOR
RP050B(__)-S1/2
INLET PRESSURE (Max.) 150 PSIG STATIC (10.4 bar)
RATED AIR FLOW (Max.) 100 SCFM (47.2 L/s)
OPERATING PRESSURE 100 PSIG DYNAMIC (6.9 bar)
OUTLET PRESSURE RANGE 0-125 PSIG (0-8.6 bar)
OPERATING TEMP. RANGE 68 -150 F (20-65 C) COMPRESSED AIR TEMP
0 - 105 F (-17 TO 40 C) AMBIENT AIR TEMP
OPERATING RELATIVE
HUMIDITY (INLET AIR) 30-100% RH
OUTSIDE DIMENSIONS 48"L x 24"W x 5.75"D
(1219mm x 610mm x 146mm)
WEIGHT (INCLUDING MONITOR) 53 LBS (24.1 kg.)
REPLACEMENT FILTER SET FX050/2

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GENERAL SAFETY WARNINGS
WARNING: THE MST RESPIRATORY PROTECTOR® MODELS:
1) SHOULD NOT be used when the air entering the filtering system is oxygen deficient. The
MST Respiratory Protector® will not increase the oxygen content of the air.
2) SHOULD NOT be used in Immediately Dangerous to Life and Health Atmosphere (IDLH)
unless it is used in conjunction with a Back-Up Escape system or a supplied air Self-
Contained Breathing Apparatus (SCBA), where applicable.
3) CARBON MONOXIDE MONITOR will alarm if Carbon Monoxide levels exceed
requirements for Grade “D” Breathing Air set fourth byOSHA/CSA. If alarm should sound,
remove respirator or activate SCBA and immediately move to safe breathable atmosphere.
Have the proper qualified personnel examine the equipment and make the appropriate
corrections before using again.
4) SHOULD NOT have air inlet pressure greater than 150 PSIG static (10.4 bar). Personal
injury could result.
5) PURIFIED AIR provided at the point - of - attachment for the Manufactures’
Respirator/Hoseshould beregulated and notexceedingthe Manufacturers’ Respirator/Hose
Assembly pressure requirements.

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GENERAL PURIFICATION SYSTEM DESCRIPTION
TheMST RespiratoryProtector,acompressedbreathingairpurifier,is asystemdesignedto remove
or reduce selected contaminates, includingCarbon Monoxide that is found in standard compressed
air lines. The Respiratory Protector gives you the advantage of connectingdirectlyto shop air from
a standard compressed air source to help provide breathingqualityair to facemasks, helmets, hoods
and other supplied air breathing devices. This eliminates the necessity of providing a separate
breathing air compressor or air supply to your workers.
The Respiratory Protector has a four stage filtration system and a Carbon Monoxide Monitor that
is mounted on a convenient mounting board that allows the unit to be mounted on any available
surface.
SYSTEM DESCRIPTION
(Refer to Figure No. 1 & 2)
Airenteringthe RespiratoryProtector FiltrationSystem at theinlet (A)isusuallycontaminatedwith
oil,water,dirt,rust,scaleandoftendeadlyCarbonMonoxide gas. Astheair passes throughthe First
Stage (B) of the MST Prefilter, particulate matter is trapped and retained. The air then enters the
Second Stage (C) of the Prefilter which coalesces liquid contaminates down to seventy-five
hundredths (0.75) of a micron in size (0.3 micron for particulate matter) with an efficiency ratingof
99.97%(meetsUnderwritersLaboratoriesSpecificationUL586forHighEfficiency,Particulate,Air
FilterUnits). Theliquidcontaminatesaretrappedin thelowerchamberof the prefilter,andexpelled
out of the unit by the Auto Drain. The air entering the Air Scrubber Inlets is 99.97% free of liquid
water and contaminants (down to 0.3 micron in size). The Third Stage (D) of the Air Scrubber
contains an odor absorbing activated charcoal which also collects various gaseous Hydrocarbons
(such as oil fumes, benzene, etc). The Fourth Stage (E) of the Air Scrubber contains a low
temperaturecatalystwhichconvertsCarbonMonoxidegasintoCarbonDioxide.Theuniquecatalyst
alsoconverts orabsorbs Ozone, Nitric Oxide, Sulfur Dioxide, NitrogenDioxide, Hydrogen Sulfide,
Ammonia, Acetaldehyde, Methyl Chloride, Methyl Ethyl Ketone, Acetone, and Methyl Alcohol.
Finally, the air passes through a one (1) micron Filtration Disk at (F). A sample of the filtered air is
taken at (G) and passed through the Carbon Monoxide Monitor. The Carbon Monoxide Monitor
continuously checks the air quality, per OSHA/CSA requirements for Carbon Monoxide, and
digitallydisplays the amount present. An audible alarm will alert operators if any dangerous levels
of Carbon Monoxide exist.

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MODEL RP050B(___)-S1/2
OPERATIONAL DIAGRAM
FIGURE NO. 1

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MODEL RP050B(___)-S1/2
RESPIRATORY PROTECTOR
FIGURE NO. 2

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GENERAL OPERATIONS
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WARNING: The MST Respiratory Protector should not:
1) be used when the air entering MST's Unit is oxygen deficient. MST's Unit willnot increase
the oxygen content of the oxygen deficient air.
2) be used in an "Immediately Dangerous to Life and Health" atmosphere, (IDLH), unless it
isusedinconjunctionwith aback-upescapesystemorasuppliedairself-containedbreathing
apparatus, (SCBA), where applicable.
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MST, Inc. strongly recommends that a complete safety program be instated to ensure that the
respiratoryair is in compliance with all OSHA/CSA standards and other applicable laws regulating
theuseofsuppliedairrespiratorysystems. MST,Inc.recommends that theairqualitybetestedupon
installation and periodicallyre-tested to ensurethat the minimumrequirementsfor breathing air are
maintained.
MST, Inc. will not assume anyliability for accidents or personal injuryresulting from the improper
use of thisequipment. Service on this equipment should only be performed by qualified personnel.
This system is to be used only by trained qualified personnel in accordance with a respiratory
program as outlined in OSHA Regulation 29 CFR 1910.134(b).
CUSTOMER AIR SUPPLY
(Refer To Figure No. 3)
1) SUPPLIED AIR LINE - Use minimum 3/4" I.D. hose or pipe to MST Unit.
2) SUPPLIED AIR LINE PRESSURE - Maximum air pressure at MST Unit's inlet should not
exceed 150 PSIG. As a Safety Back-Up, all MST Units incorporate a pressure relief valve
rated at 150 PSIG.
3) SUPPLIED INLET AIR TEMPERATURE RANGE - 68 to 150oF (20-65oC).
4) SUPPLIED AIR CONDITIONING - May be required ahead of MST's Unit to control:
a) Inlet air temperature.
b) Large Volumes of oil/water from entering MST Unit. A coarse oil/water extractor,
(rated at 2-microns abs.), may be required if excessive oil/water conditions are present.
Installation of the extractor should be located as close to MST Unit's inlet hook-up
as possible. MST, Inc. has coarse oil/water extractors available as an option.
5) AVOID INSTALLING MST UNIT AFTER DESICCANT DRYER - The Desiccant Dryer
will produce extremely dry air, (4% R.H. or less), and MST's fourth stage catalyst requires
30-100% R.H. in the supplied air for the catalyst to work and remove Carbon Monoxide
efficiently. The extremely dry air produced by a Desiccant Dryer will also cause worker
discomfort, i.e. dry throat, etc.

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MST RESPIRATORY PROTECTOR INITIAL
INSTALLATION AND START-UP
(Refer To Figure No. 3)
1) CONNECT CUSTOMER’S PIPE/HOSE TO MST UNIT - Be sure a minimum 3/4" I.D. pipe
or hose is used. Purge new air line prior to connecting to MST Unit.
2) NEW FILTER SYSTEM CONDITIONING - Flow supplied air through new filter sets for
several minutes to condition.
3) REMOTE AUDIBLE ALARM - Is supplied with unit. Plug into monitor at the “REMOTE
ALARM” jack. It is supplied with a 20 Ft. cord and produces 119 db. To check audible alarm,
rotate “zero potentiometer” (CW) until display reading is equal to alarm level setting (US=10
ppm,CAN=5ppm). The audiblealarm shouldbeenergized.The“zeropotentiometer”willhave
to be reset to ‘00' using “zero air” calibration gas, (refer to Monitor Manual).
4) POWER MONITOR/CALIBRATE - Connect the POWER CORD or AC ADAPTER to
dedicated 110 VAC switched outlet power source. Be sure the monitor’s “Green Normal or
Power”lightis onandaftera(5)minutewarm-up,calibratemonitor.RefertoCarbonMonoxide
Monitor Manual.
5) CALIBRATION GAS REQUIREMENTS - Zero Gas: Nitrogen, free of ‘CO’. Span Gas: 50 to
150 ppm of ‘CO’ concentration in air. Calibration gas flow to monitor should be 0.5 to 1.5
SCFH (approx. 472 cc/min).
6) REGULATOR/SAMPLE AIR FLOW METER - Needs to be set so proper air sample flow will
be metered to the monitor. After pressurizing system and respirator’s air flow is set, adjust
regulator located before air sample flowmeter to 10-20 psig (100 psig max). Turn the
flowmeter’sadjustmentknobcounter-clockwiseslowlyuntiltheblackfloatingballiswithinthe
GREENBOXEDareaetchedontheflowmeter’s body.CAUTION:if adjustmentknobisturned
too quickly, the black floating ball may get stuck at the top of the flowmeter scale. Damage to
monitor’s sensor may occur due to extremely high air flow to sensor, (not covered by sensor
warranty).
7) EXTREME TEMPERATURE CHANGES - Avoid; MST’s monitor best performs at a
temperature range of 0 - 1050F (-17 to 400C). Always calibrate monitor after it has stabilized
in the surrounding air temperature where system is to be used.
8) RESPIRATOR/HOOD/HOSE ASSEMBLY HOOK-UP - Consult Manufacturer’s respirator
manualfortheproperairpressurerequirementsandsetregulator(s)atpointofattachment(MST
Unit outlet or remote regulated drops). The air should be dynamically flowing through
respirator/hose assemblies when the air pressure is set. DO NOT EXCEED
RESPIRATOR/HOSE ASSEMBLY MANUFACTURER’S PRESSURE REQUIREMENTS
OR PERSONAL INJURY COULD RESULT.
9) ‘RF’ SIGNALS - May be picked up by the Remote Alarm cord (like an antenna) and create
interference with monitor’s operation. Shielding of this maybe required to reflect these signals.
For further detail contact factory.

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INITIAL START-UP AND INSTALLATION
MODEL RP050B(___)-S1/2
RESPIRATORY PROTECTOR®
FIGURE NO. 3

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AIR SAMPLE TO MONITOR ADJUSTMENT
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WARNING: SERIOUS INJURY could result if the AIR SAMPLE METERING VALVE is
not properly adjusted. Proper sample air flow to ‘CO’ monitor is required for monitor to give
correct ‘CO’ level readout.
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AIR SAMPLE FLOWMETER ADJUSTMENT
A) After pressurizing system and respirators air flow is set, adjust sample regulator to 10-20
PSI pressure.
B) Turn the flowmeter’s adjustment knob counter-clockwise slowly until the black floating
ball is within the GREEN BOXED AREA etched on flowmeter body. CAUTION: if
adjustment knob is turned too quickly, the black floating ball may get stuck to the top of
flowmeterscale. Damage to Monitor’s Sensor may occurdue toextremely high air flow to
sensor, (not covered by sensor warranty).

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MST RESPIRATORY PROTECTOR®
GENERAL OPERATION AND MAINTENANCE
1) MST MONITOR - Utilizes an electrochemical sensor to measure the carbon monoxide
content of the respirable air. If a problem has developed in the system, the monitor will
alarm due to one or more of the following conditions:
a) Monitor is out of calibration. The monitor should be calibrated monthly if used
continuously and prior to use if used on a non-continuous basis. Calibrate monitor
as outlined in the MST MONITOR MANUAL.
b) If the monitor can be and is calibrated, but the alarm still sounds, the filter cartridge
life is exhausted. Replace all three (3) filter cartridges as outlined in the FILTER
REPLACEMENT INSTRUCTIONS, page 12.
c) If the monitor can not be calibrated, the carbon monoxide sensor may require
replacement. See MST MONITOR MANUAL for replacement instructions and other
troubleshooting information. The MST MONITOR has one (1) year warranty, (sensor
has a two (2) year warranty). All warranty work must be performed at factory.
d) If the monitor was calibrated in a surrounding temperature other than where the
system was being used and the temperature difference was 36oF (20oC) or greater, the
monitor may give a false alarm due to its characteristics. Always calibrate the
monitor in the temperature conditions where the monitor is to be used in. Monitor
best performs at temperature range of 0 to 105oF (-17 to 40oC).
e) ‘RF’ signals causing interference to monitor through Remote Alarm Options and/or
Optional Power Adapter cords. Contact factory if this is occurring.
2) MST MONITOR - Alarms should be checked prior to use.
3) MSTMONITOR-ConnectthePOWERCORDorACAdaptertodedicated110VAC switched
outlet power source. Be sure the monitor’s “Green Normal or Power” light is on and after a (5)
minute warm-up, calibrate monitor. Refer to Carbon Monoxide Monitor Manual
4) MST MONITOR - Flow of the air sample to monitor should be checked periodically to ensure
sample air flow meter is not clogged. This situation normallyoccurs when customers' supplied
air has excessive liquids in it and the filters in the MST unit are not routinely c h a n g e d .
Periodically check the regulator/air flow meter for proper setting/location of air flow meter
floating ball and general appearance (presence of excessive oil, water).
5) MST RESPIRATORY PROTECTOR® SYSTEM - Filters should be replaced monthly unless
the air quality conditions warrant more or less frequent replacement. Replace all (5) filter
cartridges if:
a) The "CO" monitor alarms (fourth stage catalyst is used up).
b) The operator detects a petroleum smell and or taste in his purified air (third stage
charcoal is used up).
NOTE: If the supplied air entering MST's unit has high volumes of liquids in it, the filter
set life may be greatly reduced. See CUSTOMER AIR SUPPLY, page 8, for corrective
measures to take.
6) MST RESPIRATORY PROTECTOR®SYSTEM - New filter set:
a) Has no shelf life, but should be stored in a cool/dry storage area.
b) When first installed in MST's unit the filters should be conditioned by flowing the
customer's supplied air through system for several minutes.

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NOTE: If MST's unit is not to be used for an extended period of time, before storing, check
3rd and 4th stage filters for presence of liquid/moisture. If moisture present, dry system and
replace all filters. Also, if moisture present, consider changing filter set more frequent and
or installing MST's OPTIONAL PREFILTER prior to MST's system hook-up.
FILTER SET
SERVICE INSTRUCTIONS
(Refer To Figure No. 4)
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WARNING: Always turn off air supply and bleed air pressure before disassembling unit or
serious injury could result.
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MST, Inc. recommends replacing all five (5) filter cartridges after one month’s use, unless
conditionswarrantmoreorless frequent replacement. Conditioningequipmentprior tothefiltration
system will increase the required service intervals when only low levels (below 25 ppm CO) of
carbon monoxide are present.
TorefillorreplacethefiltercartridgesintherespiratoryProtectorModelRP050B(___)-S1/2,follow
these steps (refer to Figure No. 4):
1. 80104 Prefilter-Combined First and Second Stages
a. Remove plastic Drain Tube (1) by pulling down on the Retaining Collar of Fitting (2)
to release Drain Tube.
b. Unscrew Prefilter Bowl Assembly (3) from Manifold (5) and clean Bowl Assembly in
mild soap and water, blowing dry with low pressure compressed air.
c. RemoveTwo-StagePrefilterElement(6)byunscrewingEndCapRetaining Nut(4)and
pulling Prefilter Element down over center rod of Manifold.
d. Discard clogged Prefilter Element.
e. InspectManifold (5) for dirt and contaminates, clean as required, and inspect O-Ring
(7) located inside Manifold for any cuts or cracks. Replace O-Ring, if required, to
prevent air leakage.
f. Install new Two-Stage Prefilter Element (6) bysliding new Element over center rod on
Manifold so that rod protrudes from end of Element and Element is squarely seated
against Manifold with rod centered in Element.
g. Screw End Cap Retaining Nut (4) onto threaded portion of rod until End Cap Retaining
Nut is seated properly against end of Prefilter Element and Element has come solidly
against shoulder in Manifold.
h. Apply a light film of petroleum jelly on beveled edge of Prefilter Bowl Assembly (3)
and screw bowl Assembly into Manifold (5) until tight (NOTE: Be sure O-Ring is
properly seated in Manifold to prevent cutting O-Ring).
HAND TIGHTEN ONLY!
i. Re-attach Drain Tube (1) by sliding Drain Tube into end of Fitting (2) and pushing
Retaining collar up to lock Drain Tube in place. Be sure to slide outside diameter of
Drain Tube completely into inside diameter of Fitting or Retaining collar will not lock
Drain Tube into place properly.
2. 8007803 Air Scrubber-Third and Fourth Stages

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a. Loosen (8) Screw from (9) Bracket.
b. Loosenfive Manifold Bolts(10) enough to allow the Third and Fourth Stage Filter Tube
Assemblies to move freely.
c. Remove the two front Bolts (10) with Washers (11).
d. Slide out old Third And Fourth Stage Filter Tube Assemblies.
e. Remove old Third Stage Filter Cartridge (13) and Cap Gasket (12) from the Third Stage
Aluminum Tube (16) .
f. Clean the Aluminum Tube in mild soap and water and wipe dry.
g. Refill the Third Stage Aluminum Tube (16) by sliding the new Third Stage Filter
Cartridge (13) into the Aluminum Tube from the bottom.. Make sure that the flow
direction arrow on the new Third Stage Filter Cartridge is pointing down for proper
operation.
h. Remove (14) Sealing Label and install new (12) Cap Gasket on the top of the Third
Stage Aluminum Filter Tube Assembly.
i. Slide the new Third Stage Aluminum Filter Tube Assembly in the Air Scrubber on the
inlet side.
j. Remove old Fourth Stage Filter Cartridge (15) and Cap Gasket (12) from the Fourth
Stage Aluminum Tube (17).
k. Clean the Aluminum Tube in mild soap and water and wipe dry.
l. RefilltheFourthStageAluminumTube(17)byslidingtheFourthStage FilterCartridge
(15) into the Aluminum Tube from the top. Make sure that the flow direction arrow on
the new Fourth Stage Filter Cartridge is pointing up for proper operation.
m. Remove (14) SealingLabeland install new (12)Cap Gasketonthe bottom of the Fourth
Stage Aluminum filter tube Assembly.
n. Slide the new Fourth Stage Aluminum filter tube Assembly in the Air Scrubber on the
outlet side.
o. Tighten Manifold Bolts (10) in sequence from center outward to 100 inch-pounds.
Repeat Sequence and torque bolts to 250 inch-pounds. Recheck for proper torque limit.
p. Tighten Screw (8) on Bracket (9) to prevent any damage from occurring when
transporting the Respiratory Protector.
NOTE: Dispose of used filter cartridges in landfill according to local, state and federal regulations.

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FIGURE NO. 4