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12 685 77110 Owners Manual Horizon™ Brewers 685 77110 Owners Manual Horizon™ Brewers SERVICING INSTRUCTIONS (continued) TEMPERATURE ADJUSTMENT Disconnect brewer from electric power. Remove top panel. Remove button plug from front panel. Pull vent tube out of tank lid and insert a thermometer of known accuracy in hole. Reconnect brewer to electrical power. Place empty container under brew chamber. Energize brewer and allow unit to heat. When READY light glows, read the temperature displayed on thermometer. Adjust thermostat by turning shaft; clockwise increases temperature. 1/8 turn = approximately 10.F. Refer to Table 1 below for proper brewing temperature based on altitude. Upon completion, remove thermometer and reinstall the plug. Fig. 9 Checking and Adjusting Brew Temperature CAUTION: SHOCK HAZARD These procedures involve exposed electrical circuits. These procedures are to be performed by qualified technical personnel only. NOTE: Optimum brewing temperature range is 195.F to 205.F (90.C to 96.C). IMPORTANT: A mechanical thermostat will maintain temperature within ±5.F. To prevent boiling water in the brewer, thermostat should be adjusted to a maximum temperature equal to the local boiling temperature minus 5.F. Table 1 Boiling Temperature by Altitude ELEVATION (feet above seal level) 05001,000 1,500 2,000 2,500 3,000 3,5004,000 4,500 5,000 5,5006,000 6,500 TEMP. ( . F) 195 200 205 210 190 IDEAL BREWING TEMPERATURE MAXIMUM TEMPERATURE SETTING BOILING POINT OF WATER ELEVATION (meters above seal level) 0150300450600750900 1.0501.200 1.350 1.500 1.6501.800 1.950 TEMP. ( . C) 91 94 97 100 88 IDEAL BREWING TEMPERATURE RANGE MAXIMUM TEMPERATURE SETTING BOILING POINT OF WATER 13 SERVICING INSTRUCTIONS (continued) 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. NOTE: DELAY is the amount of time before a second brew can be initiated, and is factory set for 5 minutes. LOCK and ALARM are not used. IMPORTANT: Before setting assembly into tank, make sure tank lid gasket is properly seated on flange of lid. DO NOT OVER-TIGHTEN. IMPORTANT: When mounting thermostat, be sure to insert sensing bulb to the bottom of the bulb well. Tighten capillary lock nut only enough to ensure no water leakage. Excessive tightening is not necessary. IMPORTANT: When replacing heating element, also replace seal gaskets. TIMER ADJUSTMENT (AUTOMATIC BREWERS ONLY) The amount of water dispensed automatically during a brew cycle is controlled by the timer. Place empty decanter (for Model 0482, use an airpot) under brew chamber. Press BREW button. Brewer should dispense one full decanter or airpot of water. To adjust amount: Remove brew chamber and button plug. Adjust knob on timer; clockwise increases time. Run several cycles to check amount of water delivered. Replace button plug. REMOVE TANK LID ASSEMBLY Disconnect brewer from electric power. Turn OFF water supply. Remove top panel. Pull vent tube and inlet elbow out of basin pan. On automatic models, pull water inlet tube out of basin pan. Remove basin pan. On models with faucet, disconnect inlet pipe at faucet shut-off valve and outlet pipe at faucet. Disconnect all wiring from thermostat, hi-limit, and heating element. Loosen two nuts on tank hold-down bracket. Remove hold-down bracket by sliding short slotted end off of locking stud and lifting it off. Remove cover assembly by lifting it straight up. Reassemble in reverse order. REPLACE THERMOSTAT (COTHERM) Disconnect brewer from electric power. Turn OFF water supply. Remove top panel. Disconnect all wiring from thermostat only. Loosen and free jam nut from pass-thru fitting securing temperature sensing bulb. Remove two screws holding thermostat to bracket. Lift out thermostat, sensing bulb and thermostat gasket. Reassemble in reverse order. BE SURE the bulb well is fully seated in the tank fitting, and that the temperature sensing bulb is inserted to the very bottom of the bulb well. REPLACE HEATING ELEMENT Remove tank lid assembly per above. Remove two hex nuts holding element to cover. Pull element from mounting holes. Reassemble in reverse order. 685 77110 Owners Manual Horizon™ Brewers 14 SERVICING INSTRUCTIONS (continued) 15 REPLACE SOLENOID Symptom: Automatic brewer will not flow water; or, automatic brewer drips continuously from brew head. NOTE: Wrench p/n 86660 is designed to allow easy removal of the hoses from the plastic solenoid valve. IMPORTANT: Shut-off water and disconnect brewer from electric power before removing hoses or wiring. Remove top cover and detach solenoid access door from cabinet. Remove faucet tube from faucet valve at flare fitting. Remove water supply flare fitting: a. Slide the 5/8" end of the wrench over the flats on the inlet fitting of the valve. b. Hold the wrench to prevent the inlet fitting f...

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