Cleveland steamcraft 21-CET-8 Service Manual page 105

Page 98 Model 21 -CET-8 Service Manual
6. Check for 120 VAC from the TIMED/MANUAL switch orange wire to the ON/OFF
switch white/black wire connection.
• If the meter does not read 120 VAC, the fault is not in the float assembly.
a. Test the ON/OFF switch.
b. Test the TIMED/MANUAL switch.
c. Test the contactor for an open coil
• If the meter reads 120 VAC, cither the float or the float wiring circuit is faulty.
a. Check the wiring between the TIMED/MANUAL switch, the float, the
contactor, and the ON/OFF switch for continuity, and secure connections.
Replace or repair faulty wiring and connections.
b. If the wiring and connections are good, the float assembly is faulty. Replace
the float assembly.
7. About one minute after the fill solenoid valve opens, the water begins to fill the
float cylinder. Check the bottom of the cylinder.
• If water begins to fin the float cylinder, continue this procedure with step 9.
• If water does not begin to fill the float cylinder, continue this procedure with
step 8.
8. Connect the voltmeter across the float high level switch.
Refer to Figure 5-26 and connect the voltmeter leads to the red wire connections at
the fill solenoid and relay K1. Check for 120 VAC across these test points.
• If the meter reads 120 VAC across these test points, the high level switch is
faulty. Replace the float assembly.
• If the meter reads 0 VAC, test the fill solenoid valve.
9. As the water level rises to about one inch in the float cylinder, the lower float
begins to move up the shaft. Check the voltage readings across the float low
level switch.
• If the meter reads 120 VAC across the float low level switch, the switch is
faulty. Replace the float assembly.
• If the meter reads 0 VAC across the float low level switch and the contactor
does not energize, the float low level switch is good. Test the contactor.
• If the meter reads 0 VAC across the float low level switch and the contactor
energizes, continue this procedure with step 10.
10. As the water level continues to rise in the float cylinder, the lower float reaches
its stop. The upper float starts to move up with the water level When the water
level is about one inch from the top of the float cylinder, the upper float magnet
opens the upper level switch and deenergizes the fill solenoid valve. The valve
doses and the water level stops rising. As the unit begins to generate steam, the
water level drops, the upper float energizes the fill solenoid, and the water fills to
the upper level The water level and upper float cycle up and down two to five
times per minute.
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