Low Water Level Control Circuit - Cleveland SteamCraft V Service Manual

Page 66 CET-16 Service Manual
Figure 5-7. Water Level Probe Test Connection

Low Water Level Control Circuit

6. Slowly adjust the potentiometer to reduce the resistance. Stop
adjusting the potentiometer at the moment the water solenoid turns off.
7. Remove potentiometer and measure its resistance. The resistance
should be between 10,000 and 15,000 ohms (see Figure 5-8).
8. Reconnect the potentiometer. The water solenoid should turn off
immediately.
9. Disconnect the potentiometer and reconnect the probe.
1. Turn off water supply fines and drain the steam generator.
2. Refer to me wiring diagram (see Table 6-1). Disconnect the black wire
from the low water level probe (probe nearest rear).
3. Using a meter, set the resistance of the potentiometer to 20,000 Ohms.
4. With probe disconnected, connect the potentiometer between the
common (green) wire and the black wire that leads bad to CON 2 (see
Figure 5-9).
5. Turn on unit by pressing the POWER touch pad. The WATER alarm
light should light.
6. With a test magnet installed over the door sensor, press the MANUAL
touch pad. The ON indicator over the touch pad will fight, and the
condenser solenoid valve win open. The neater contactors will not
energize.
7. Slowly adjust the potentiometer to reduce the resistance. Stop adjusting
potentiometer at the moment the contactors) energize and the WATER
alarm fight turns off.
Figure 5-8. Potentiometer Test Connection
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