c. Adjust the delivery pressures at the air and the water pre-regulators, if
(1) In systems that use dual pre-regulators, you must adjust the air pressure
before the water pressure since that adjustment affects both the air and water
(2) In systems that use a single pre-regulator, the air and water pressures
are both controlled by the same regulator whose outlet pressure is always one-half that
of the air regulator. Thus, by adjusting the system air pressure to 80psi, the water
pressure is automatically regulated to 40psi.
(3) In systems that use two of these pre-regulators, the air and water
pressures are independently adjustable.
With all systems, adjust the pre-regulator by using the following
(a) Turn the knob clockwise to increase pressure.
(b) Turn the knob counterclockwise to decrease pressure.
The pilot-operated regulators are not self-relieving. When adjusting to
decrease the pressure, relieve the pressure in the system before reading the
gauge. Do this by running a handpiece or depressing the syringe buttons.
Refer to figure 4-5.
d. Turn the master ON-OFF toggle to the ON position; the ON-OFF indicator
should change colors.
This step cannot be accomplished unless the foot pedal is depressed, and
the handpieces are attached.
Do not run handpieces without a burr in the chuck, or before properly
oiling the turbine as damage to the unit can occur. Use only sterile test
Do not exceed recommended operating pressures as specified by the
e. Adjust the coolant air pressure for all handpieces simultaneously using the
coolant air flow control valve.
f. Reposition the control head, if necessary, using the arm brake toggle switch
located on the right side of the control head.