12
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.
3.7
Pressure Relief Valve Installation
Do Not operate this equipment without a pressure relief device installed to protect the AirPrep
System from over-pressurization. The ASME Code requires that all vessels be operated with
pressure relief devices in place.
Local regulations set the specifications for pressure relief valves; therefore it is the responsibility
of the owner of the abrasive blaster to install a pressure relief valve that meets
all
applicable
regulations. The pressure relief device must be set at the maximum allowable working pressure
of the AirPrep System pressure vessel. See the ASME vessel nameplate attached to the pressure
vessel. All AirPrep Systems include an auxiliary pressure vessel coupling that can be used to
install a pressure relief valve. See Figure 3.7 for a recommended installation.
Figure 3.7 – Suggested location for air pressure relief valve
3.9
Personal Protective Equipment (PPE)
AirPrep Systems are designed to be used with abrasive blasting equipment; therefore operators
may be exposed to hazards that may not be directly related to the AirPrep System. Abrasive
blasting has many hazards that may cause injuries to operators. To protect operators from injury
each must be supplied with and required to use Personal Protective Equipment. The
