Schmidt ACS 1200 Operation And Maintenance Manual Download Page 31

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5.4 Air Motor (radiator fan)

The air motor (#5) is a rotary type motor operated by compressed air. The expansion of the
operating air during normal operation creates a cooling effect. Therefore, the temperature of the air
motor will not exceed the higher of the surrounding atmosphere or the air input temperatures. The
vanes of the air motor take up their own wear and will last 5,000-15,000 hours depending upon
speed, method of oiling, operating pressure and the maintenance performed on the motor. The
operating air must be clean, oiled and should not exceed the specified pressure; therefore, a
filter/regulator and an automatic lubricator are installed in the air line upstream of the motor (refer
to Section 11.0, Table 2 for air motor specifications). Ball valve (#13) turns off the air motor.

Note:

The air motor air supply must be clean, dry, and lubricated to minimize chance of motor failure.

5.5 Combination Air Filter/Regulator (fan air motor)

The compressed air supplied to the air motor passes through an air filter/regulator (#14) to remove
moisture which could cause rust in the air motor and could cause ice to form on the exhaust muffler
(#17). The water that is removed by the filter can be drained by opening the petcock valve at the
bottom of the air filter. This valve should be left slightly opened anytime the system is in operation.
This allows water to be drained as it is filtered from the air. Some models may be equipped with
filters having automatic drains.

The aftercooler fan speed can be controlled by changing the supply air pressure. The pressure is
adjusted by turning the knob of the air filter/regulator (#14), clockwise to increase pressure/motor
speed and counterclockwise to decrease pressure/motor speed. The air pressure is indicated by the
pressure gauge (#16) mounted on the regulator body.

Note:

The air motor pressure must not exceed

the specified maximum pressure (see Section 11.0, Table 2).

5.6 Automatic Air Lubricator (fan air motor)

After the air motor supply air passes the filter/regulator it is oiled by the automatic micro-fog
lubricator (#15). The amount of lubrication depends on the volume of air passing through the
motor. A detergent SAE #10 automotive engine oil is recommended; however, SAE 10W-30 may
be substituted. The lubricator flow rate is adjusted based upon the air cfm flow rate required for the
air motor. Refer to Section 11.0, Table 2 for air flow and drip rate. The oil feed adjustment is made
by turning the knob at the top of the lubricator, clockwise to increase flow or counterclockwise to
decrease flow. The lubricator reservoir can be drained if contaminants accumulate inside.

Failure to properly lubricate the air motor as detailed above will result in costly motor failure.

Note:

Filter/regulator and lubricator arrangement may vary from what is shown in Figure 5.1.

5.7 Electric Motor (radiator fan)

Electric aftercooler fan motors (#5) are optional and are available in various operating voltages
depending on the size of the aftercooler. The motor characteristics are on the nameplate attached to
the motor (see to Section 11.0, Table 2 for motor specifications). The motor should be connected to
a power source of the same characteristics as the motor. Be sure to provide proper overload
protection to minimize chance of possible motor burnout. Verify the “as purchased” specification
before installation and operation. Follow the manufacturer’s installation recommendations. Turn
the fan by hand to eliminate possible motor burnout in the event the fan has been damaged in
shipment. Observe operation after motor is started for the first time. See drawings in Section 9.0.

To protect against possible electrical shock, it is important to properly ground this unit using the
grounding screw provided. Be sure not to disconnect the motor grounding wire when making this
connection.

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.