Frymaster FBCR18, FBKR18 Series manual Functional Description

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FBCR18 & FBKR18 SERIES GAS RETHERMALIZERS

CHAPTER 6: SERVICE PROCEDURES

6.1Functional Description

These rethermalizers contain a welded stainless steel cookpot that is directly heated by a high efficiency burner system requiring approximately 43% less energy than conventional burner systems to heat the same volume of water.

Two self-contained combustion chambers (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.

THE ELECTRONIC IGNITION SYSTEM

Ignition modules, located in the component box, are connected to ignitor assemblies at each burner. An ignition module performs four important functions: it provides fuse protection for the 24-volt circuit, provides an ignition spark, supplies voltage to the gas valve, and proofs the burner flame.

The module contains a 4-second time delay circuit and a coil that activates the gas valve. The ignitor assembly consists of a spark plug, an enrichment tube, and a flame sensor.

At start-up, the power switch is placed in the ON position, supplying approximately 12-volts DC to the heat control circuitry in the controller or computer and to one side of the heat relay coil on the interface board. If resistance in the temperature probe indicates the temperature in the cookpot is below 180ºF (82ºC), the current flows through a circuit containing a timer switch that alternately closes for 6 seconds and opens for 24 seconds. If the temperature is 180ºF (82ºC) or above, the current flows through a heat circuit, bypassing the timer switch. In either case, ground 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 to the gas valve. Simultaneously, the module causes the ignitor to spark for 4 seconds to light the burner. 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 cut, preventing the main valve from opening, and the ignition module “locks out” until the power switch is turned off and then back on.

A probe monitors the temperature in the cookpot. When the programmed setpoint temperature is reached, resistance in the probe causes the heat cycle circuitry in the controller to cut off current flow through the heat relay. This in turn cuts off the 24 VAC to the ignition module, causing the gas valve to close.

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Contents Hour Service Hotline Canada Page FBCR18 & FBKR18 Series GAS Rethermalizers Table of Contents Operator Troubleshooting Parts Ordering and Service Information Applicability and ValidityInstallation, Operating, and Service Personnel Safety InformationEquipment Description Definitions Shipping Damage Claim ProcedureWhat to do if your equipment arrives damaged General Installation Requirements National Code Requirements Caster/Leg Installation Incoming Gas Pressures GAS Connections and Pipe Sizes Converting to Another Gas Type FBCR18 Series Computer FBCR18 Series ComputerProgramming the FBCR18 Series Computer FBKR18 Series Computer Programming the FBKR18 Series Computer Page Operating the FBKR18 Series Rethermalizer FBKR18 Computer Display Messages Honeywell Shutting the Rethermalizer Down Daily Checks and Services Inspect Rethermalizer and Accessories for DamageQuarterly Checks and Services Semi-Annual Checks and ServicesCheck Burner Manifold Pressure Burner Manifold Gas Pressures Page Troubleshooting Guides Water not HEATING. Autofill Worked Properly Burners do Not Light Problem is beyond scope of operator troubleshooting Replacing the Computer or Computer Wiring Harness Functional Description Computers Temperature Probe Checking the Burner Manifold Gas Pressure Cleaning the Gas Valve Vent TubeMeasuring Flame Current Replacing the Temperature Probe Replacing the Interface BoardReplacing the Combustion Air Blower Replacing an Ignitor AssemblyReplacing an Ignition Module Replacing the Gas ValveReplacing a Burner Assembly Troubleshooting and Problem Isolation Replacing the CookpotIgnition Failures Incoming Gas Pressures Improper Burner FunctioningPage Improper Temperature Control Computer-Related ProblemsTroubleshooting the Gas Valve Troubleshooting the 24 VAC Circuit 24VAC Circuit Troubleshooting the Temperature Probe Probe Resistance Chart Simplified Wiring Diagrams FBKR18 onlyInterface Board Computer FBCR18 & FBKR18 Series GAS Rethermalizers Parts List Burner System ComponentsCabinetry and Associated Components Side, Cabinet, CRS for S/S units, useComputer, Component Box Assembly, and Associated Parts Cookpot and Associated Parts Gas Supply Components Plumbing Components Nipple, Close, 1 NPTService Hotline

FBKR18 Series, FBCR18 specifications

The Frymaster FBKR18 and FBCR18 series are among the industry’s leading commercial fryers, designed to meet the rigorous demands of high-volume food service operations. These advanced fryers are built to provide exceptional frying performance, energy efficiency, and ease of use, making them ideal for restaurants, cafeterias, and catering operations.

One of the standout features of the Frymaster FBKR18 and FBCR18 series is their innovative cooking technology. These fryers incorporate the patented Frymaster oil management system, which helps to improve oil life while ensuring consistent food quality. The system includes an advanced filtration mechanism that can be operated manually or automatically, allowing for quick and efficient oil changes while minimizing downtime.

Another key characteristic of the FBKR18 and FBCR18 series is their impressive capacity. With the ability to hold up to 18 pounds of oil, these fryers can accommodate large batches of food, making them perfect for busy kitchens. The fryers come equipped with dual fry pots, allowing operators to prepare multiple menu items simultaneously without flavor transfer.

Energy efficiency is also a critical aspect of the Frymaster FBKR18 and FBCR18 series. These fryers utilize a high-efficiency burner design that reduces energy consumption while still delivering sufficient cooking power. This feature not only helps to lower utility costs but also contributes to a more environmentally friendly operation.

The design of the FBKR18 and FBCR18 series is focused on ease of use and safety. The fryers feature a user-friendly digital control panel that allows operators to easily monitor and adjust cooking temperatures. Additionally, the fryers are equipped with built-in safety features, such as automatic shut-off mechanisms, ensuring safe operation even in high-demand situations.

Durability is another hallmark of these fryers. Constructed from high-quality stainless steel, the FBKR18 and FBCR18 series are built to withstand the rigors of daily use in commercial kitchens. Their robust design not only ensures longevity but also simplifies cleaning and maintenance.

In summary, the Frymaster FBKR18 and FBCR18 series fryers combine advanced cooking technology, impressive capacity, energy efficiency, and user-friendly design to meet the needs of busy food service operations. With their durability and high performance, these fryers stand out as excellent choices for chefs aiming to achieve culinary excellence.
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