(1) This large volume of dry expanded air passes through the drying
chamber, where it:
(a) Reabsorbs moisture from the desiccant.
Releases the moisture absorbed into the atmosphere.
When the pressure in the storage tank decreases to 60 psi:
(a) The pressure switch closes.
(b) The pumping cycle again begins.
It should take approximately 31 seconds to bleed from 80 psi to 60 psi.
It should take approximately 8 seconds to build from 60 psi to 80 psi.
a. General Operating Procedures. Prior to operating the compressor, you
perform the operational checkout procedure discussed in Lesson 2, Perform Verification
of Compressors. The actual operating procedures of the compressor are fully
automatic. As the load requires compressed air, the compressor operates to supply it.
There are no operating adjustments associated with normal operation.
b. Intermittent Operating Procedures. If the dental operating unit will not be
drawing compressed air from the compressor for any period of time, set the ON-OFF
circuit breaker to OFF. Refer to paragraph 1-4c.
c. Operator Controls and Indicators. Refer to figure 1-2.
Drain valve. Use to remove water and air from the storage tank.
Dryness indicator. Indicates presence of moisture in the air (blue is dry,
pink is wet).
Pressure gauge. Indicates the pressure of air in the storage tank.
Red manual unloader tab. Use to unload compressor head before
(5) ON-OFF circuit breaker. Power switch and protective device for
(6) Swivel arm. Use to support the transit case cover above the compressor
during normal operation.