Assessments - 3, GPA: 4.3
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Heating element should receive full line voltage (i.e. 120V, 208V or 240V). Be sure the hi-limit safety is reset. Reset by holding the CANCEL key for 3 seconds. If lights resume flashing after 4 minutes: Check the voltage across the heating element terminals: a. If no voltage is present, unplug brewer and replace power board. b. If proper voltage is present, unplug brewer and replace tank heating element. Is the brew temperature properly adjusted? The brewer may occasionally go into error mode if the brew temperature is set too high. See page 15 for temperature adjustment procedure. This brewer is designed to perform a continuous internal diagnosis, and to signal faults by flashing all the lights. In fault mode, warmers, heating element and water fill solenoid are turned “off”, and most keypad functions are disabled. Error detection (all lights flashing) will occur under two conditions: • Anytime a temperature in excess of 214.F is detected. • Temperature does not change by at least 2.F within 4 minutes of tank heater being energized (HEAT light on). To reset the brewer after the fault has been corrected, press and hold the CANCEL key for 3 seconds, or disconnect the brewer from electrical power for three seconds. SERVICING INSTRUCTIONS SERVICING INSTRUCTIONS CAUTION Electric Shock Hazard Opening access panels or removing warmer plates on this brew may expose uninsulated electrical components. Disconnect brewer from electrical power before removing any panel or warmer plate. ACCESS PANELS TOP PANEL: Remove top panel to access hot water tank, thermo probe, heating elements, brew circuit tubing, faucet valve and piping. Top panel is held by two screws at the rear and a retaining lip at the front. FRONT PANEL: Remove front panel to access controller, terminal block and solenoid. Front panel is held by two screws at the bottom and a retaining lip at the top. SOLENOID DOOR: Remove solenoid door to access solenoid plumbing connections. Solenoid door is held by two screws and a retaining lip. 642 75872 Owners Manual E.B. C. Airpot /Thermal Fig. 12 Access Panels 14 642 75872 Owners Manual E.B. C. Airpot /Thermal SERVICING INSTRUCTIONS (continued) TEMPERATURE ADJUSTMENT Unplug power cord or turn circuit breaker OFF. Remove top panel. Remove button plug from front panel. Pull vent tube out of tank lid and insert a thermometer of known accuracy in vent hole. Reconnect brewer to electrical power. Place empty container under brew chamber. Energize brewer and pour one decanter (64 oz.) of cold water into pour-over opening. When HEAT light goes out, read the temperature displayed on thermometer. Adjust WATER TEMP dial on controller; clockwise increases temperature. Refer to Table 1 below for proper brewing temperature based on altitude. Upon completion, remove thermometer and reinstall vent tube. Fig. 13 Checking and Adjusting Brew Temperature Table 1 Boiling Temperature by Altitude ELEVATION (feet above seal level) 05001,000 1,500 2,000 2,500 3,000 3,5004,0 00 0 4,500 5,0 00 0 5,50 00 6,0 00 0 6,500 TEMP. ( . F) 195 200 205 210 190 IDEAL BREWING TEMPERATURE RANGE MAXIMUM TEMPERATURE SETTING BOILING POINT OF WATER 15 CAUTION Electric Shock Hazard These procedures involve exposed electrical circuits. These procedures are to be performed by qualified technical personnel only. NOTE: Optimum brewing temperature is 195.F to 205.F (90.C to 96.C). Maximum temperature setting should be no more than 205.F (96.C). IMPORTANT: An electronic temperature controller will maintain temperature within ±2.F. To prevent boiling water in the brewer, controller should be adjusted to a maximum temperature equal to the local boiling temperature minus 2.F, or 205.F, whichever is less. SERVICING INSTRUCTIONS (continued) IMPORTANT: Water pressure must be between 20 p.s.i and 90 p.s.i. flowing pressure. If water pressure exceeds this value, or if water pressure varies greatly, a pressure regulator must be installed in the water supply line. IMPORTANT: Before setting assembly into tank, make sure tank lid gasket is properly seated on flange of lid. DO NOT OVER-TIGHTEN. IMPORTANT: When replacing temperature probe, be sure a new seal washer is in place around the probe. Tighten jamb lock nut only enough to ensure no water leakage. Excessive tightening is not necessary. IMPORTANT: When replacing heating element, also replace seal gaskets. BREW TIME ADJUSTMENT The amount of water dispensed automatically during a brew cycle is controlled by the SOLENOID TIME dial of the controller. Place empty decanter under brew chamber. Press BREW button. Brewer should dispense one full decanter of water. To adjust amount: Remove brew chamber and button plug. On the controller, adjust SOLENOID TIME dial (BREW TIME); clockwise increases time. Run several cycles to check amount of water delivered. DRIPOUT TIME ADJUSTMENT Water delivered to the brew chamber will take a while to drip through as coffee. The time between the end of a brew and when a new brew can be initiated ...
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