Frymaster FPHD manual Improper Temperature Control

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HIGH EFFICIENCY DECATHLON SERIES GAS FRYERS

CHAPTER 1: SERVICE PROCEDURES

1.8.2 Improper Burner Function (cont.)

Burners lighting on the left side only may be caused by a trailing pilot problem (four- and five-tube frypots) or improper burner manifold pressure.

Fluctuating flame intensity is normally caused by either improper or fluctuating incoming gas pressure, but may also be the result of variations in the kitchen atmosphere. Verify incoming gas pressure in the same way as for "popping,” discussed in the preceding paragraphs. Variations in the kitchen atmosphere are usually caused by air conditioning and/or ventilation systems starting and stopping during the day. As air conditioning/ventilation systems start and stop, the pressure in the kitchen may change from positive or neutral to negative, or vice versa. Changes in airflow patterns may affect flame intensity.

Flames "rolling" out of the fryer are usually an indication of negative pressure in the kitchen and make up air blowing down the flue. Air is being sucked out of the fryer enclosure and the flames are literally following the air. If negative pressure is not the cause, check for high burner-manifold gas pressure in accordance with the procedures in Section 1.4. An obstructed flue, which prevents the fryer from properly exhausting, may also be the cause.

Excessively noisy burners may indicate that the burner gas pressure is too low, the tube diffusers are defective or burned out, or it may simply be that the gas valve vent-tube is blocked (if applicable). If the gas pressure is correct, the tube diffusers are intact and in good condition, and the vent-tube is unobstructed (if applicable), the gas valve regulator is probably defective.

1.8.3 Improper Temperature Control

Temperature control is a function of several interrelated components, including the melt cycle. Each must operate correctly. The principal component is the temperature probe. Depending upon the specific configuration of the fryer, other components may include the interface board, the computer/controller itself, and the ignition module.

Improper temperature control problems can be categorized into melt cycle problems and failure to control at setpoint.

In fryers equipped with a Thermatron, the problem will be with the thermostat. Possible causes are that the thermostat is out of calibration or defective. Refer to Section 1.6 for instructions on calibrating the thermostat.

In fryers equipped with computers, the problem may be with the temperature probe, the interface board, or the computer. Refer to the troubleshooting guides in this chapter.

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Contents Hour Service Hotline Includes HD63/Red Robin and Common CabinetryMAY Page Computers FCC Table of Contents Page Functional Description GAS Information Altitudes of 2000 feet or lessPilot System Configuration Electronic Ignition ConfigurationControl Options Interface BoardsThermatron Board P/N Interface Boards Test Meter Setting Pins Test Results Indicates power from 12V transformerAccessing Fryers for Servicing ThermostatsRestraints Cleaning the Gas Valve Vent Tube if applicable Adjusting Burner Manifold Gas PressureAdjusting the Pilot Flame Calibrating the ThermatronMain Pilot Trailing PilotReplacing Fryer Components Replacing the ComputerReplacing the Temperature Probe Computer-equipped Fryers Replacing the Temperature Probe Computer-equipped Fryers Probe cannot be repositioned Installing the New Temperature Probe Replacing the High-limit ThermostatLocate the high-limit probe Capillary tube cannot be repositioned Replacing Rocker Switches Figure BReplacing Rocker Switches Replacing the Pilot Assembly Replacing the FrypotRemoving the joiner strip Removing gas manifold shield Removing bolts arrows securing flue to frypot Nut Valve Boot Clamp Remove the drain valve nut and attached Hardware Cutting frypot seal prior to frypot removal Lifting frypot from fryer Troubleshooting and Problem Isolation Ignition FailureElectronic Circuits Improper Burner FunctionImproper Burner Function Improper Temperature Control Improper Computer Function Improper Filtration Function Frypot Leakage Improper Basket Lift Function Bell-Crank Basket Lifts Troubleshooting Guides ProblemNot possible Wiring Diagrams High Efficiency Decathlon, Thermatron with Constant PilotRight/left sides are the same Computer with Constant Pilot CM4-S Wiring Dean Oil Return Wiring Dean Oil Return Wiring, with Solenoid Probe Resistance Charts High Efficiency Decathlon Series GAS Fryers Parts List High Efficiency Decathlon HD Primary ComponentsDecathlon HD50 Primary Components includes Scfhd units See Orifices, SectionSee Drain Manifold Components, Section Decathlon HD50 Primary Components includes Scfhd units Decathlon HD60 Primary Components includes Scfhd units 823-4692Flue Box Assembly also used on HD63 fryers Front, Flue Box Decathlon FPHD65 Primary Components Channel, Base 265 465 565 Cabinet Upper BackCabinet Lower Back Door Assembly, with Liner also used for HD63 fryers Orifices Natural OrificesPropane Orifices Control Panel Options, Joiner Strips, and Accessories AccessoriesControl Panels Joiner StripsOptional Components and Controllers Bezels HD/SCFHD50 SCFHD456 SCFHD60Interface Boards High Efficiency Decathlon Series GAS Fryers Parts List Drain Valve Assembly, 1 1 ⁄ 2 without Microswitch Drain Valve Assembly, 1 1 ⁄ 2 with MicroswitchFlush Oil Drain Line Oil Return Manifold Components Oil Return Manifold Components Oil Return Manifold Components Oil Return and Oil Flush Components Microswitch Bracket Assembly, Oil Return Oil Suction AssemblySuction Manifold Assembly Oil Suction Start FittingDescription Filtration Components SCFHD60 and SCFHD63 Series Fryers 106-7543Filtration Components FPHD65 Series Fryers Basket Lift Components Basket Lift Components Trough, Holster, & Cover Components Fasteners Screws, Nuts, Bolts Service Hotline
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