Frymaster manual ELECTRIC COOKERS 8SMS, 8BC AND 8C SERVICE PROCEDURES

ELECTRIC COOKERS 8SMS, 8BC AND 8C

CHAPTER 6: SERVICE PROCEDURES

6.1Functional Description of Electric Cookers 8SMS, 8BC and 8C

Electric Cookers 8SMS, 8BC, and 8C contain an extruded stainless steel cookpot that holds 8.7 gallons (33 liters) of water. The water in the cookpot is heated by an 8-kilowatt element at the bottom of the pot. The solid-state SMS II Spaghetti Magic controller controls electrical power to the element. The 8SMS also has an 8.7 gallon (33 liter) rinse tank.

On units without the Autofill (automatic filling) option, when the controller is turned on by pressing the Power switch, logic circuits in the controller check for water in the cookpot by looking for a grounded low-water level sensor. (The sensor is grounded by contact with the water in the cookpot.) If the sensor is grounded, the controller automatically enters the BOIL mode, supplying continuous power to the element. If the operator selects the SIMMER mode, logic circuits in the controller monitor the temperature of the water and cycle power to the element on and off to maintain the temperature at the simmer mode setpoint. (See Section 4.2 in Chapter 4 for instructions for adjusting the simmer mode setpoint.) The cooker also has a high-limit safety. If the water in the cookpot falls below the low-water level sensor but the sensor remains grounded for whatever reason, the high- limit switch will open, cutting off power to the element, when the element temperature reaches 400 ±15ºF.

On units equipped with the Autofill option, a logic circuit in the controller automatically opens a solenoid valve on the water supply line if the upper water level sensor is not grounded by contact with the water in the cookpot. When the Power switch is pressed, if the water level is below the upper water level sensor, water is automatically added to the cookpot. When sufficient water has been added to cover the heating element, the unit automatically enters the BOIL mode and remains there unless the operator presses the SIMMER mode switch or turns the unit off. When the water level in the cookpot contacts the upper water level sensor, the solenoid valve in the water supply line closes.

On units equipped with the Autoskim (automatic skimming) option, when the Skim switch is pressed, a logic circuit in the controller automatically opens the solenoid valve in the water supply line for three seconds every minute until the option is turned off by again pressing the Skim switch.

The operator enters a specified cooking time by pressing the number pads on the controller. When the Start switch is pressed, the controller begins to count down to zero. When the controller times out, an alarm sounds briefly, then the timer reverts to the last time entered.

On units equipped with basket lifts (8SMS or 8BC), when the Start switch is pressed to start the cooking cycle, logic circuits in the controller activate the basket lift motor, lowering the baskets into the cookpot. As the motor drives the basket lift down, a roller-activated switch loses contact with the bellcrank (cam) attached to the motor and power to the motor is cut. When the controller times out, logic circuits reverse the switch positions so that the motor circuit is again completed and the motor is restarted, raising the baskets from the cookpot. At the fully raised position, the roller switch again makes contact with the cam, cutting power to the motor and stopping the lift in the up position.

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