1 www.dcionline.com
C1000 Series Service & Maintenance Manual
Theory of Oporation
Theory of Operation
THEORY OF OPERATION
While Not Running
A. When the motors stop after reaching the cut-out pressure of 100psi, the user will have clean / dry air ready for use in
the dental operatory. The compressor will remain in this “idle” state until the tank pressure drops to 80 psi, at which time
the compressor motors will turn on and return the running mode of operation.
B. The “Time Operated” dryer purge valve operates on a time basis instead of a “single cycle” basis used on most other
types of dental air compressors. Two timers, “located on the front of the valve assembly”, control how often and the
duration of each purge cycle.
SECTION II
NOTE
: The compressor does not purge when the
compressor cycles off!
C. The “Left” timer knob on the purge valve, controls the
duration of the purge cycles. This timer is factory preset
and should not be adjusted. The factory setting is at the
maximum of 10 seconds.
D. The “Right” timer knob on the purge valve controls how
often the compressor purges moisture from the drying
chamber. The factory setting is 7 minutes, and should NOT
be adjusted.
E. A “TEST” button is located between the two timer knobs
to allow a technician to verify that the valve is operating
correctly.
By purging the drying chamber on a time basis, the DCI air
compressors ensure the drying chamber desiccant remains dry,
even during heavy usages, for consistent air quality.
Plumbing Schematic
Left
Motor
Right
Motor
Check
Valve
Check
Valve
Aftercooling
Tubing
Coalescing
Filter
Condensate
Drain
Drying Chamber
Flow/Check
Drying System
Pressure Gauge
Dryer Bypass
Ball Valve
To
Storage
Tank
Strainer
Shutoff
Valve
Time Purge
Valve
w w w.dcionline.com
6
