Garland S680 SERIES Installation And Service Manual

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Garland S680 SERIES Installation And Service Manual Manual pdf 11 page image

Part # P152 Rev 1 (01/13/10) Page 11MAINTENANCE AND CLEANINGRegular servicing by a competent person is recommended toensure safe and efficient performance of the applianceWARNING: Turn off the electrical mains beforecommencing any service workThermostat CalibrationOvenIt is normal for an electromechanical thermostat to cycle witha 45°F - 50° F (25°C - 28°C) range when checking calibrationallow the thermostat to cycle a minimum of two times1 Place the thermocouple of the test instrument in thecenter of the oven2 Turn the oven temperature control dial to 400° F (205°C) In order to allow the oven temperature to stabilize,the oven control must be allowed to cycle twice beforetaking a test reading3 Check the temperature reading just when the controlcycles “OFF” as indicated by the cycling pilot lamp If thetemperature does not read with in 15° F (8°C) of the dialsetting, recalibrate as follows:4 Carefully remove the thermostat dial, not disturbing thedial setting5 Hold the thermostat shaft steady with a small flat bladescrew driver Turn the calibration screw located inside theshaft clockwise to decrease the temperature and counterclockwise to increase the temperature NOTE: each ¼ turnof the screw will create a change of approximately 35° F(20°C)6 Replace the thermostat dial and repeat steps 1 though 3to verify that the correct adjustment has been madeDial ShaftCalibration Screw HeadCalibrationScrew Head IncreaseDecrease1/4" TurnGriddle1 Use a test instrument with a special disc typethermocouple or a reliable surface type pyrometer NOTE:a drop of oil on the face of the disc will provide bettercontact with the plate2 Set all griddle thermostats to 350°F (177°C) In orderto allow the griddle temperature to stabilize, thethermostats must be allowed to cycle twice before takinga test reading3 Check the griddle temperature when the thermostat justcycles “OFF” by placing the thermocouple firmly on thegriddle directly about the sensing bulb of the thermostatThe reading should be between 335° F (168°C) and 365°F and (185°C) If the reading is outside of these limits,calibrate as follows:4 Carefully remove the dial, not disturbing the shaftposition5 Hold the shaft steady and with a small flat screwdriver turn the calibration screw located inside theshaft clockwise to decrease temperature and counterclockwise to increase temperature NOTE: Each ¼ turnof the screw will create a change of approximately 35° F(20°C)6 Replace the thermostat dial and repeat steps 1 through 3verify that a correct adjustment has been made