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Figure 7.1 – Typical AirPrep Dryer System
7.2
AirPrep System Startup
7.2.1. The AirPrep System must be properly prepared and all operating personnel must be
thoroughly trained before beginning operation. Completely read and understand all
sections of this manual before beginning operation. See the pre-operation procedures
given in Section 6.0.
7.2.2. Perform the required inspections and maintenance before beginning AirPrep System
operation. See the instructions given in Section 8.0.
The AirPrep System is a Pressurized Vessel. Propelled objects will cause serious injury
or death. Depressurize vessel before performing any maintenance. See Section 6.2.
7.2.3. Supply air to the AirPrep System by starting the air compressor and opening the
compressor's air outlet valve.
7.2.4. Slightly open drain valves (#7), (#19) and petcock valve (#22) (units with air motor) so
that moisture/debris can be drained from the pre-filter, after-filter, separator tank, and air
filter as it is removed from the compressed air.
7.2.5. If the unit has an electric aftercooler motor, press the “Start” button to begin cooling fan
operation, then skip to step 7.2.8. If the aftercooler has an air motor, open the air motor
on/off ball valve (#21).
7.2.6. Adjust air pressure regulator (#23) to the required pressure. See Section 11.0 for correct
air motor inlet pressure setting. Turn clockwise to increase pressure/motor speed and
counter-clockwise to decrease pressure/motor speed.
Do not exceed maximum air motor pressure. Exceeding the air motor operating pressure
can cause system failure. See Section 11.0, Table 2 for air motor operating pressure.
7.2.7. Adjust the lubricator (#24) to the proper flow rate. The lubricator should be adjusted to
feed (1) one drop of oil for every 50-75 cfm of air passing through the air motor. Turn
the socket head screw on top of the lubricator to adjust flow (clockwise to increase flow,
counterclockwise to decrease flow).
Failure to lubricate the air motor will result in motor failure. See Section 11.0, Table 2
for air motor cfm requirements.
7.2.8. Confirm that the aftercooler fan rotation is correct. The airflow should be up through the
radiator (#8) with the exception of Model 250 which is downward flow. Incorrect air
flow is indicates the air motor (#9) air supply and exhaust ports are reversed. On units
with electric fan motors electrical changes are required. Consult a qualified electrician.
7.2.9. Open outlet ball valve(s) to supply air to the connected equipment (see Figure 6.2).