Frymaster FPHD manual Control Options, Interface Boards

Page 8

HIGH EFFICIENCY DECATHLON SERIES GAS FRYERS

CHAPTER 1: SERVICE PROCEDURES

Electronic Ignition Configuration (cont.)

At start-up the ON/OFF switch is placed in the ON position, supplying 12 VDC 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 frypot is below 180°F (82°C), the current flows through a melt cycle circuit where a timer switch alternately closes for 3 seconds and opens for 24 seconds. If the temperature is 180°F (82°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. NOTE: The listed melt cycle times and exit temperature pertain to the Compu-Fry computer only.

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 90 seconds to light the pilot flame. A flame sensor verifies that the pilot is lit by measuring the flow of microamps through the flame. If the pilot 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 current to the ignition module, resulting in closure of the gas valve.

NOTE: Unlike previous modules, microamp readings on these black modules will move up and down as the module pulses on and off and this is an indication that the module is functioning.

Control Options

HD Series gas fryers may be equipped with Thermatron controls or Compu-Fry computers.

In fryers equipped with Thermatron controls, the fryer is turned on and off by means of a rocker switch and the temperature is set by adjusting a potentiometer. An interface board is located in the component box (shield) behind the control panel (computer-equipped) or a Thermatron board is located in a component box inside the cabinet (Thermatron-equipped).

Interface Boards

The interface board provides a link between the controller/computer and the fryer’s individual components without requiring excessive wiring, and allows the controller to execute commands from one central point. Two types of interface boards may be used in HD Series gas fryers; the type used depends on the fryer configuration.

In units configured for electronic ignition and constant pilot, P/N 106-6669 is used; in units configured with a manually lit pilot (non-electronic ignition), P/N 106-6710 is used.

1-3

Page 7 Page 9
Image 8
Page 7 Page 9
Contents MAY Hour Service HotlineIncludes HD63/Red Robin and Common Cabinetry 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 Right/left sides are the same Wiring DiagramsHigh Efficiency Decathlon, Thermatron with Constant Pilot 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 ComponentsSee Drain Manifold Components, Section Decathlon HD50 Primary Components includes Scfhd unitsSee Orifices, 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 Cabinet Lower Back Channel, Base 265 465 565Cabinet Upper Back Door Assembly, with Liner also used for HD63 fryers Propane Orifices OrificesNatural 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 Flush Oil Drain Line Drain Valve Assembly, 1 1 ⁄ 2 without MicroswitchDrain Valve Assembly, 1 1 ⁄ 2 with Microswitch 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
Top Page Image Contents