Cleveland Range Convotherm Combination Oven-Steamer Gas 20.20 - Manual (Page 67)

CLEVELAND RANGE OGS 20.20
SEQUENCE OF OPERATIONS
When using these instructions refer to the OGS 20.20 wiring schematic.
1
When 120 VAC is applied to the combi, it is sent to the Power Control Switch (S1).
2
When the Power Control Switch (S1) is closed
a
The red light in the switch is energized.
b
120 VAC is sent through the Z1 Filter and the 20 amp fuse (F10.1) to L1 and L2
on the Motor Drive (U10.1)
c
120 VAC is sent through the Z2 Filter and the 20 amp fuse (F10.2) to L1 and L2
on the Motor Drive (U10.2)
d
120vac is sent through the 2 amp fuse (F1.1) to
• The primary of the Upper Hot Air 24v Transformer (T1)
◊ 24 VAC is sent from the secondary of the transformer to the Upper Hot
Air Burner Control (N20)
• The primary of the Lower Hot Air 24v Transformer (T3)
◊ 24 VAC is sent from the secondary of the transformer to the Lower Hot
Air Burner Control (N22)
• To terminal 12 of connector X1 on the Hot Air Burner Control (N20)
• To terminal 12 of connector X1 on the Lower Hot Air Burner Control (N22)
• The 12 VDC Power Supply (G1)
◊ 12 VDC is sent to terminals 1 and 2 of connector X20 on the Gas Board
(A20)
◊ 12 VDC is sent to terminal 3 and 4 of connector X10 on the Control Board
(A10)
• To terminal 2 of connector X1 on the Hot Air Power Burner and Fan Control
(U20)
• To terminal 2 of connector X1 on the Lower Hot Air Burner and Fan Control
(U22)
• To terminal 1 of connector X12 on the Control Board (A10)
e
With 120 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.
3
When the ON/OFF is depressed with the combi in the steam mode
a
The display will show the set temperature and set time.
4
With the combi in the steam mode with time on the timer, the door closed and the
start switch is depressed