Frymaster GBC EN - Manual (Page 4)

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GAS COOKERS GSMS, GBC, AND GC SERVICE AND PARTS
CHAPTER 1: SERVICE PROCEDURES
1.1 Functional Description
The GSMS, GBC, and GC Gas Cookers all have a 12.7-gallon (48.1-liter) stainless steel cookpot.
The water in the cookpot is heated by a high-efficiency infrared heating system that requires
approximately 43% less energy than conventional burner systems to heat the same volume of water.
Two self-contained combustion chambers (commonly referred to as burners) are located beneath the
cookpot. Each combustion chamber is fitted with special ceramic tiles that are heated by the burning
of a forced air/gas mixture. The tiles transfer their heat to the cookpot by means of infrared
radiation, providing much more constant and uniform heat dispersion over the surface of the cookpot
than do conventional burners. Because relatively less heat is lost to the atmosphere in the process,
compared to “open-burner” designs, less fuel is required to achieve and maintain a given cookpot
temperature.
Gas flow to both of the burners is regulated by one electromechanical gas valve.
Operational control of the burner system is accomplished through a solid-state SMS III Spaghetti
Magic controller. NOTE: The SMS III controller used in this model series is identical in
appearance to the SMS III controllers used in other model series, but differs internally. Use only the
part numbers listed in Chapter 2 when replacing controllers on this equipment. The GSMS is
equipped with a basket lift, and also features automatic filling (Autofill), automatic skimming
(Autoskim), a swing-away jointed faucet, and an attached 16.5-gallon (62.5-liter) rinse-tank. The
GBC model is identical to the GSMS except that it does not have the swing-away faucet and
attached rinse-tank. The GC has no basket lift, no faucet, and no rinse tank.
When the controller Power switch is pressed, a logic circuit in the controller automatically checks
the water level in the cookpot. A normally closed solenoid valve on the water supply line
automatically opens if the normal water-level sensor is not grounded by contact with water in the
cookpot. When sufficient water has been added to ground the low water-level sensor, the unit
automatically enters the SIMMER mode and remains there unless the operator presses the BOIL
mode switch or turns the unit off. When the water level in the cookpot reaches and grounds the
normal water-level sensor, the solenoid valve in the water supply line closes. Anytime the water
level in the cookpot drops below the normal water-level sensor, the solenoid valve opens to refill the
cookpot to the proper level.
While in the SIMMER mode, logic circuits in the controller monitor the temperature of the water
and cycle the burners on and off to maintain the temperature at the setpoint programmed into the
controller. (See Chapter 3 for instructions on adjusting the setpoint.) The cooker also has low-water
safety. If the water in the cookpot falls below the low water-level sensor, the controller cuts power
to the gas valve, causing it to close and cut off the gas supply to the burners.
The Autoskim feature (on units so equipped) is activated by pressing the Skim switch. When the
feature is activated, a logic circuit in the controller automatically opens the solenoid valve in the