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Toastmaster, 10 Sunnen Drive, St. Louis, MO 63143, (314) 781-2777
2M-32345
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IN CASE OF FIRE griddle 1. De-energize power at disconnect switch. This will cut off to the heating elements allowing griddle to cool. This reduces point the flash temperature making it easier to stop the fire. 2. Cover the affected area with a heavy blanket or canvas. Play the fire extinguisher nozzle over the blanket or cover to seal off air thus smotherino the fire. CAUTION: Do not attempt to fight a grease fire by playing the nozzle of the fire extinguisher directly on the grease. bu
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CONTENTS TABLE OF ---------------- Description Sequence of Operation Specifications 7 the Griddle for Service Accessing -- 3 Control Temperature 5 of Temperature Control Calibration 8 Elemqnts Heating l0 Replacement Removal and --------- t2 Thermocouples 13 Critical Replactment- 14 Or/Off Switch ------- t4 LED 15 Wiring Schematics 2l
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FOR SBRVICO TIIE.GRIDDLE ACCESSING W. the front through and elements are accessed All controls griddles are front serviceable. Series All AM panel. control be unscrewed panel can then griddle. The the from the front of must be removed grease drawer First, the CAUTION: it is fitted. recess in which free of the the panel to drop allow the top lip of down to and slid panel' not to drop the Thke care griddle. panet ningla to the the is NdT bottom of The panel held in a
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V. TEMPERATTJRECONTROL A. Tboubleshooting Troubleshooting The Solid State Temperature Centrol Verify output from the No power (0 VAC) reading load side of the solid exists across the output state control- See terminals as in example A examplesA&Bbelow indicating a CLOSED relay. 208-24o VAC power reading powel Check to be sure -120 exists across present the output is (110 VAC) terminals as in exampie B at both output terminals of indicating an OPEN relay. the control to ground using
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Cont. Tfoubleshooting same time, the line voltage suppty to the In the event more than one solid state control fails at the Control. This is a control is suspect. Check for any blown varistors across the ouput terminals of the good power phase to the griddle indication of a spike on one of the lines If the control The control is designed to operate,with a maximum heatsink temperature of 7fC. applied orthe temperature in exceeds 70oC, eitherthe control's thermal compound has been improperly
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VI. CALIBRATION OF TIIE POTENTIOMETER A. Ttoubleshooting Calibration of the potentiometer is necessary only after replacement of the controller or if the calibra- plate jarred tion should become loose from its factory calibrated position. The allowable temperature range of the gdddle is 15CPF(65'C) to 450'F(230.C) for each zone. Within paftrmeterthe this temperature temperature should fluctuate no more than +14"F(j'C) from the set point temperature. B. Calibrating Procedure Not
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THERMOCOUPLE LOCATION CHART CALIBRATION SOURCE 6-5/32" (ls,,/r']'ml 11-3t4' 11-3t4j 11-3t4" (298.45mm) (298.4Smm) (298.45mm) 12-114', (311.1Smm) =Thermocouple Locations | 1-314" 11-314" (298.45mm) (298.45mm) 12-1/4J (311.1 AM36 (3 FT GRTDDLE) = O Thermocouple Locations 6-5133 1-314i 12.Uq (311.15mm) (24FT GRIDDLE) 4 = Thermocouple Locations 8 Figure 6
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$ss Potentiometer Calibration Figure 9 r$s Location of I /2a Nut Behird Knob Note: The figure 10 below represents a temperature graph taken during the calibration of an ANI24 Griddle. Two waves numbered | &2 arc the individual zones of the 2 ft griddle. gdddle The was calibrated at a common temPerature setting of 350"F( I 75'C). A properly griddle calibrated will have a Stolerance of l4"F(7"C) the graph as reveals. Temperature Swing At 350eF Figure 10
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VII. IIEMING ELEMENTS A. Tloubleshooting Start Here presence Using an amprobe Check for proper check for of voltage to the amp draw at element and for leads to element. open circuits. Track down probable cause. Qualify if the amps griddle are to the specifications. See Chart Fig.3. Check for open ciicUit i6 element. p_rotlern Calibibtion with the control. See calibration ...=...jj seclion for'guidance. incoming Check Prob-lem:..208- VAG voltage; check cold applied to 240 VAC resistance of
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connections, problems heating elements arc open connections,;bad common with electric The most will normally trip a breaker. In some ground faults. grounded or element circuits or A shorted short heat without tripping a breaker. the grounded element can continue to circumstances, is to all wires from the if an element is grounded or shorted disconnect The only way to determine ground for a shorted and frorn one lead to the leads for the resistance reading element. Check across indic
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B. Element Removal & Replacement elernents The are to,,be replaced as an assembly .Failure ALWAYS! to do so will result in uneven heating sf the griddle surface, The elements are specially compressed between the element package box assembly and ttre top heater plate. This provides even heat transfer griddle to the cooking surface and the elimination of air entrapment between the element and heater plate. .' element'assembly An can be removed'through griddle. the front of the Refer to Fi
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eater Assemb[y Frame Support lnsulation Stand-Off Package lnsrila Stand- O Cover Cotter Pih The irrsulation cover Ng{ei shown and the insulation are and do as an exploded view while not need to be removed 7/16" Nuts Under pivoting element assemblY the Support Frame down. Element Assembly RemovaliReplacement 4 Figure II
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\rIII. THERMOCOT]PLES , A. Troubleshooting Control Circuit a) an open thermocouple will inhibit the conirol from operating b) a shorted thermocouple will cause the control to run away since it defaults to room tempemture c) a reversed wired thermocouple will cause the confiol to read backwards and runaway Shorting the thermocouple is good a way to see if quickly the control responds by coming on during troubleshooting. Since shorting the thermocouple is the same as bridging the circ
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B. Replacement tubsand is'inser'ted the thermocouple; it is imperative that it slides into the support When replacing that the thermocouple swings transition crimp toucheSthe tube'inlet. Refef to figure 5. Note until the the bottom This enables accurate temperature sensing iirto a channel at of thegriddle surface. upward will cause inaccu- to position the thetmocouple the way into the support tube of the surface. Failufe all gdddle control of the and adverse cooking results. rate temper
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IX. ON/OTF SWITCHES The On/Off switch is designed to handle currents as higfr as 20 Amps. The cunent values running through the switch are very small at 12 VAC. Therefore when checking the switch for continuity, it is important to set the ohm meter possible on the R x 100 scale,to read resistances up to ohm. Any 1.0 resistance reading of 1.0 ohms or greater VAC will drop the 12 and- cause the control not to operate. When replacing the rocker switch, be sure that has a protective the s
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XL SCHEWIATICS i'i -ltl _Jt' B t E+= H i .^.E g VEEx o !E O-' g. EEffi; C' F E+ 95 6g) of - ',: F F--ii o o. lss e[T l6
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