CLEVELAND RANGE OEB 20.20
SEQUENCE OF OPERATIONS
When using these instructions refer to the OEB 20.20 wiring schematic.
1When incoming power (220 VAC) is connected to the combi, 220 VAC is sent to a The contacts 2,4 and 6 of the Safety Contactor (KO)
b The terminals 2 and 3 of the Control Power Switch (S1)
2When the Control Power Switch (S1) is turned on (closed) a The red light on the switch is energized.
b Incoming power (220 VAC) is sent through the 2A fuse (F1.1) to
•The 12 vdc power supply (G1)
◊12vdc is sent to terminals 3 and 4 of the connector X10 on the Control Board (A10)
•Terminal 1 of connector X12 on the Control Board (A10)
•Terminal 10 of connector X13 on the Control Board (A10)
•The return of the Supply is sent to terminal 7 of connector X13 on the Control
Board (A10)
cWith 220 VAC to the Control Board (A10) The Operation Board (A11) is energized
•An alarm will sound for one second
•All the LED’s and the display will energize one at a time.
•“STARTING” will be displayed for 3 seconds
•“please wait” will be displayed
•The international model number will be displayed
•The time and date will be displayed and this will continue until the on/off switch is depressed.
3When the ON/OFF is depressed with the combi in the steam mode
a After a date change (the first time the combi is turned on) the display will ask “Generator Flush?”. If no answer is given in 10 seconds or a yes is indicated the flush will begin.
•220 VAC is sent from terminal 1 of connector X13 on the Control Board (A10) to the Generator Pump (M4).
•As the water level drops below the probes the fill solenoid (Y3) will energize. This rocking of the water will help flush scale from the generator.
•Then the pumps will be energized again
•When the condensate box is heated to 140 degrees F at the B3probe, 220 VAC is sent from terminal 5 of connector X12 to the condenser valve (Y1) until the temperature drops.,
bThe display will show the set temperature and set time when the flush cycle is complete.
cThe Control Board (A10) will check the water level by looking for a ground at terminals 1 and 2 on connector X15. These are connected to the high and low probes (B1) in the steam generator.
