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Convotherm Mini Combi with Easy Touch - Sequence of Operations

Convotherm Mini Combi with Easy Touch
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.CLEVELAND RANGE Mini Combi
For
TIM HORTENS
SEQUENCE OF OPERATIONS
When using these instructions refer to the included wiring schematic.
1 When incoming power (220 VAC) is connected to the combi, 220 VAC is sent
a To the normally open c
ontacts of the Safety Contactor (K0)
b Through the 3A fuse (F1.1) to
The 12 vdc power supply (G1)
12vdc is sent to terminals 1 and 2 of the Easy Touch Power Switch
12vdc is sent to Terminal 10 of connector X13 on the Control Board
(A10)
Through the oven high limit (B7) and another 3 amp fuse (F10), to terminal 1
of the connector X12 on the control Board (A10).
c With 12 VDC to the Control Board (A10), the Operation Board (A11) is
energized
2 When the ON/OFF is depressed 12VDC is sent from terminal 3 and 4 of the on/Off
switch to to terminals 3 and 4 of Connector X10
a The display will show Easy Touch and the Tim Hortons.
b 12 VDC is sent from terminals 1 and 2 of connector X10 on the control Board
(A10) to the cooling fans (M3.1 and M3.2)
c 12VDC is sent from terminal 9 of connector X13 on the Control Board (A10) to
energize the Humidity Valve Motor (M2)
As the Humidity Valve Motor rotates 360 degrees the cam switch (S2) opens
and closes to set the position of the cam on the motor.
d 220 VAC is sent from terminal 5 of connector X12 of the control Board to the
Condenser Valve (Y1) for 30 seconds.
e 220 VAC is sent from terminal 2 of X13 on the Control Board to the coil of the
Safety Contactor (K0).
220 VAC is sent to the normally open contacts of the element contactor (K4).
220 VAC is sent to the AC Drive terminals L1 and L2
3 With the combi in the steam mode with time on the timer the door closed and the start
icon is depressed
a The front display will include a Thermometer while the unit preheats.
b The fan circuit is energized
Voltage is sent from terminals 7 and 9 on connector X14 on the Control Board
to the terminals S and R respectively on the AC drive board for 2 minutes.
The AC drive board ramps up the oven fan motor (M1) Clock wise for 2
minutes.
Voltage is removed from the AC Drive for 15 Seconds
Voltage is sent from terminals 7 and 8 on connector X14 on the Control Board
to terminals S and F respectively on the AC drive board for 2 minutes.
62

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