Frymaster 1824/2424G manual Control Options

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24G SERIES FLATBOTTOM GAS FRYERS CHAPTER 1: SERVICE PROCEDURES

cycle circuit where a switch alternately closes for approximately 4 seconds and opens for approximately 20 seconds. If the temperature is 150°F (66°C) or above, the current flows through a heat circuit, bypassing the timer switch. In either case, current is supplied to the other leg of the heat relay coil, which then closes an electronic switch in the 24 VAC circuit to provide current to the ignition module.

Circuitry in the ignition module sends 24 VAC current to the gas valve via a normally closed high- limit switch and a drain safety switch. Simultaneously, the module causes the ignitor to spark for up to 11 seconds to light the burner flame. A flame sensor verifies that the burner is lit by measuring the flow of microamps through the flame. If the burner does not light (or is extinguished), current to the ignition module is interrupted, preventing the main valve from opening, and the ignition module "locks out" until the power switch is turned "OFF", then back "ON".

A temperature probe monitors the temperature in the frypot. When the programmed setpoint temperature is reached, resistance in the probe causes the heat cycle circuitry in the controller to interrupt current flow through the heat relay. This in turn interrupts the 24 VAC to the ignition module, resulting in closure of the gas valve.

Control Options

24G Series Flatbottom gas fryers are equipped with Thermatron temperature controller. The fryer is turned on and off by means of a rocker switch and the temperature is set by adjusting a potentiometer. The Thermatron board is located in the wireway box behind the control panel, or in a component box inside the cabinet (depending on fryer configuration).

The Thermatron temperature controller operates by comparing resistance between the potentiometer setting and the temperature probe. If the resistance values don’t match, an on-board relay energizes, sending voltage to the gas valve that supplies fuel to the burners. When the resistance values are equal, the on-board relay de-energizes, interrupting voltage to the gas valve, which stops the fuel flow.

Depending on the system configuration and destination, 24VAC, 115VAC or 208/230VAC controller boards are used.

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Contents Hour Service Hotline DEC 24G Series Flatbottom Gas FryersPage Computers Where Applicable FCC 24G Series Flatbottom Gas Fryers Table of Contents CE only Altitudes of 2000 feet or less Functional DescriptionNON-CE Altitudes of 2000 feet or less Pilot System Configuration Electronic Ignition ConfigurationControl Options Thermatron Controller Board Accessing Fryers for Servicing Safety ComponentsCleaning the Gas Valve Vent Tube if applicable Adjusting Burner Manifold Gas PressureAdjusting the Pilot Flame where applicable Calibrating the Thermatron Temperature ControllerLoosen two setscrews in dial arrows to recalibrate Remove/Replace Temperature Probe or High-Limit Thermostat Replacing Fryer ComponentsTemperature probe High-limit Removing/Replacing Rocker Switches 24G Series Flatbottom GAS Fryers Service Procedures Removing/Replacing Blower Assembly or Air Prover Switch Replacing air prover switch Replacing the Frypot Frypot Baffle InspectionFrypot/Firebox Removal/Replacement Procedure 24G Series Flatbottom GAS Fryers Service Procedures If the Firebox Requires Replacement Troubleshooting and Problem Isolation Problems Related to the Electronic Circuits Ignition FailuresImproper Burner Functioning 24G Series Flatbottom GAS Fryers Service Procedures Improper Temperature Control Filtration Problems24G Series Flatbottom GAS Fryers Service Procedures Leakage Troubleshooting Guides Power is present at To temperature quicklyTemperature Main Burner MalfunctionsIndicator Lights Light Indication Probable Cause Corrective ActionWiring Diagrams 10.2 24G Series Single Fryers, Non-CE with Boil-Out Switch 24G Series Flatbottom GAS Fryers Service Procedures 24G Series Flatbottom GAS Fryers Service Procedures 24G Series Flatbottom GAS Fryers Service Procedures 24G Series Flatbottom GAS Fryers Service Procedures 24G Series Flatbottom GAS Fryers Service Procedures Single Fryers CE-Approved 10.8 24G SeriesWiring, Standing Pilot Scfc Models 10.10 24GTI Oil Return/Filter System 24G Series Flatbottom GAS Fryers Parts List Blower Assembly and Combustion AirBurner Manifold and Related Components Component Flue Caps, Top Caps, and Related Components 2424G Notched Left End use 823-4058 for notched right end Common Cabinet Components Scfc Models Cabinetry Scfc ModelsNot illustrated Door Assemblies and Component Parts Scfc Models Control Panels, Wireways, and Related Components Scfc Models Component Oil Return and Suction Manifolds Scfc Models Component Filter Unit Scfc Models Frypot, Drain, and Oil Return Components Scfc Models 24G Series Flatbottom GAS Fryers Parts List Previous Style SCF Models Cabinetry SCF ModelsBack, Single Fryer Cabinet Door Assemblies and Component Parts SCF Models Control Panels, Wireways, and Related Components SCF Models Not illustrated Oil Return and Suction Manifolds SCF Models Component 24G Series Flatbottom GAS Fryers Parts List Filter Unit SCF Models Caster, 2-inch Rigid use 810-2805 for 2-inch Swivel CasterFrypot, Drain, and Oil Return Components SCF Models Component Drain Valve and Components Wiring Connectors, Pin Terminals, and Power Cords Connectors 2-Pin Female 6-Pin Female 9-Pin FemaleScrews, Nuts, and Fasteners Appendix ND90 Built-In Filter System Components Line Parts Pump, 5GPM use 810-2098 for 8GPM Pump Seal, Shaft O-Ring Service Hotline