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MODEL C24EA - SWITCHES, BUZZER AND SOLENOIDS
F25213 (May 2006)Page 31 of 52
6. Perform pressure switch Check.
Check
NOTE: Pressure can be checked with the small air
pocket that exists between the delime port cap and
water level probe housing in the delime hose. Make
certain that no leaks exist in generator tank or
pressure gauge fittings.
1. Turn off machine to drain steam generator tank.
Allow steamer to complete drain cycle.
A. Turn off water supply.
2. Remove RIGHT SIDE PANEL as outlined in
COVERS AND PANELS.
3. Remove cap from delime port and install
pressure gauge.
4. Close cooking compartment door.
5. Mark one tooth of pressure switch adjustment
wheel to aid in identifying position of wheel.
Make a second mark on body of pressure
switch in alignment with mark on adjustment
wheel.
6. Turn steamer on.
A. Set timer for approximately 10 minutes.
B. Wait for full steam production to stabilize.
This is accomplished by allowing
approximately five cycles of fill to occur
once steam is being produced by the
generator tank. Observe LED on water
control board to count cycles.
NOTE: Operating pressures will vary slightly
between machine being serviced and gauge used.
C. Observe pressure gauge once steam
begins to be generated. Gauge should
level out at approximately 1.25 to 2.0 psi,
but will oscillate with respect to fill water
entering generator tank.
NOTE: If pressure should rise above 5.0 psi when
performing check, release clamp. Pressure switch is
out of tolerance and must be adjusted. Refer to
Adjustment for procedure.
7. While observing pressure gauge, clamp steam
outlet hose closed.
A. Listen for contactors to release indicating
that pressure switch contacts have
opened. Correct range for pressure switch
cut out is between 4.5 to 4.7 psi.
B. Release clamp from steam outlet hose.
Listen for switch contacts to close
(contactors will energize).
TYPICAL OPERATING PRESSURE