Cleveland Range OES-20.20 The K57 contactor closes, K50 contactor closes and the motor turns CW

K57 to the coils of contactor K56 and contactors K55.1 for the upper motor and K55.2 for the lower motor

◊The K56 contactor closes sending 220 VAC through the Q56.1 overload to the motors.

◊The K55.1 contactor closes completing the high speed circuit to the upper motor and the upper motor turns at a high speed.

◊The K55.2 contactor closes completing the high speed circuit to the lower motor and the lower motor turns at a high speed

◊The normally closed auxiliary contacts of K55.1, K55.2 and K56 open preventing the K57 contactor from energizing.

•If the combi fan is in the reduced setting 220 VAC is sent from terminal 6 on connector X11 through the normally closed auxiliary contacts of contactors K55.1, K55.2 and K56 to the coil of contactor K57

◊The K57 contactor closes

(a)220 VAC is sent through the Q57.1 thermal overload to the motor and the upper motor turns at a reduced speed.

(b)220 VAC is sent through the Q57.2 thermal overload to the motor and the lower motor turns at a reduced speed.

◊The normally closed auxiliary contacts of K57 open preventing the K55 and K56 contactors from energizing.

•For the first 2 minutes 220 VAC is sent from terminal 4 on connector X11 through the normally closed auxiliary contacts of contactor K5 to the K50 contactor coil

◊K50 contactor closes and the motor turns CW

◊The normally closed auxiliary contacts on K50 open preventing the K5 contactor from energizing.

•For 15 seconds the motor is de-energized and allowed to coast.

•For the next 2 minutes 220 VAC is sent from terminal 3 on connector X11 through the normally closed auxiliary contacts of contactor K50 to the K5 contactor coil

◊K5 contactor closes and the motor turns CCW

◊The normally closed auxiliary contacts on K5 open preventing the K50 contactor from energizing.

•NOTE: If the door switch (S7) opens by the door opening, then the fan circuit is de-energized. Then the motor will be pulsed in the opposite direction to “break” the fan. This is to stop the fan quicker for the operator.

cThe hot air heat circuit is energized

•220 VAC is sent from terminal 3 of connector X12 on the Control Board (A10) to the coil of Contactors K41 and K61 until the cabinet reaches the set temperature as sensed at probe B6.

◊The Contactors K41 and K61 close and he 220 VAC is sent to the outer elements (E41 and E61)

•220 VAC is sent from terminal 7 of connector X11 on the Control Board (A10) to the coil of Contactors K42 and K62 until the cabinet reaches the set temperature as sensed at probe B6.