DentalEZ NuSimplicity - Control Valve Speed Adjustment

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DentalEZ
®
Equipment
PN: 2717-256E
Section IV Operation
Tools Required
• Phillips-head Screwdriver
• Flathead Screwdriver
• Safety Glasses
To Adjust Speed
1. Raise the chair base to its full UP position.
2. Take o the base (pump) cover by removing
and retaining the four Phillips-head screws
that attach it to the base plate.
NOTE: Adjustable  ow control valves, located
in the hydraulic control valve, are used to set
the chair function speeds. The base and back
cylinders are single acting cylinders. They have
two  ow control valves each (UP and DOWN) to
control their speeds (Figure 30) .
NOTE: Function times given are based on a
200-pound person sitting in the chair.
a. Move the base up and down, adjusting the  ow
controls until it takes 12 seconds for the base
to move either up or down the full travel.
b. Move the back up and down, adjusting the  ow
controls until it takes 12 seconds for the back
to move either up or down the full travel.
NOTE: With the  ow adjustments closed all the
way, the seat may not move at all until the valve is
adjusted open a little.
CV1
CV2
UP
DOWN
UP
DOWN
BACK
BASE
FLOW
DEC.
INC.
Figure 30. Hydraulic valve
Hydraulic
Valve
Control Valve Speed Adjustment
• WEAR SAFETY GLASSES while adjusting
the valve. Flow control valves should not
be turned out farther than the top of their
heads being even with the valve body
surface. Adjustment of the  ow control
valves beyond the valve body surface may
result in oil leakage with uncontrolled
motion of the chair and the possibility of a
valve being ejected from the valve body.
WARNING