Schmidt ACS 1200 Operation And Maintenance Manual Download

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3.6 Blast System Air Quality

AirPrep Systems are equipped with an inlet filter/separator to remove debris and condensed
moisture from the incoming air flow; however, if the air source contains an excessive amount of
debris, it may be necessary to install a preliminary filter upstream of the AirPrep System inlet.
Excessive contamination of the incoming air can clog the heat exchanger of the AirPrep System
and cause expensive damage to the system.

3.7 Electrical

Requirements

AirPrep Systems can be equipped with electric fan motors. On units equipped with electric fan
motors the supply voltage can range from 110Vac (single phase) to 460Vac (three phase). Each
electric motor can be wired one of two voltages as specified by the purchaser at the time of
purchase however, the motor can be rewired at installation. If the unit is to be rewired it may be
necessary to change the motor starter and/or the thermal overload strips. Only a qualified electrician
should install and/or make electrical changes to the AirPrep Systems.

Power connections to AirPrep System with electric motors expose operators to high electrical
voltages. Contact with high electrical voltages can result in serious injury or death. Only qualified
personnel should install or perform maintenance on the electrical system.

3.9 Breathing Air Quality

All blast operators must be supplied with and required to use NIOSH approved air-fed respirators.
Breathing air supplied to these respirators must meet Grade D air quality standards as specified by
OSHA 29 CFR 1910.134(i) and the Compressed Gas Association Specifications ANSI/CGA G-7.1.
Consult these specifications when selecting a source of breathing air.

Breathing air must be clean, dry, contaminant-free, and provided at a pressure and volume specified
by NIOSH. Use NIOSH approved air filters on all sources of breathing air. See Section 3.10.

Breathing air filters do not remove carbon monoxide or any other toxic gases. Use a carbon
monoxide monitor to detect unacceptable levels. Consult OSHA 29 CFR 1910.134(i).

Many sources of breathing air are available such as air cylinders, free-air pumps, oil-less air
compressors, and oil lubricated air compressors. The most used source is the same air compressor
that is used for the blast air which most often is oil lubricated. Breathing air provided by an oil-
lubricated air compressor can contain carbon monoxide and therefore requires the use of a carbon
monoxide detector (See Section 3.10). Carbon monoxide can be in the compressed air produced by
an oil-lubricated air compressor when it is operated at extremely high temperature; therefore, a high
temperature alarm is required to alert the operators when this condition exists.

Oil lubricated air compressors can produce carbon monoxide. Carbon monoxide can cause
asphyxiation and result in death. Use a high-temperature alarm and a carbon monoxide monitor
when an oil lubricated air compressor is used to supply breathing air. Consult OSHA 29 CFR
1910.134(i).