Page 209 - Womens Pavilion
P. 209
“Oil-Less” Scroll Medical Air
6.0 Inspection/Replacement Procedures
6.6 Backup Pressure Switch Set Point Adjusting Instructions
Adjustments
1. To locate the adjuster, slide the adjustment
access cover to reveal a slotted adjustment
The backup switch is set at the factory to the
operating point(s) as stated on the wiring diagram screw.
supplied with the unit. It is good practice to cycle 2. Turn the screw inward (clockwise) to increase
the switch to determine actual operating points
before proceeding with readjustment. the setpoint and outward (counter-clockwise)
to decrease the setpoint. The backup pressure
switch should always be set with falling
CAUTION:
pressure level starting at a pressure level higher
than the setpoint.
• ALWAYS change pressure setting gradually.
• ALWAYS check switch setting before making 3. Using the pressure gage, determine the
any adjustments. actuation point of the switch.
• DO NOT force slotted adjustment screw when 4. If the actuation point is above the desired value,
it becomes diffi cult to turn. turn the slotted adjustment screw counter-
clockwise to decrease the actuation point, and
• ALWAYS isolate the pressure transducer if it is below, turn the slotted adjustment screw
before making any adjustments to the backup clockwise to increase it.
pressure switch.
5. For exact pressure setting, cycle pressure switch
and make fi ne adjustments be repeating steps
Adjustment Access Cover 2 through 4 (trial and error process) until the
desired setting is obtained.
6. Slide the adjustment access cover back into
place over the slotted adjustment screw.
Increase
Slotted Adjustment Screw
(Internal)
Figure 6.5 Backup Pressure Switch
4107 9000 69.06 6-6
