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manual abstract
It consists of a non-pressure, vented water compartment into which is installed an electric immersion heater thermostatically controlled through a contactor relay, to keep the water always at the desired brewing temperature. Automatic refill maintains water level in water compartment. All control system components are enclosed in a stainless steel housing on the right end of the urn: A master ON-OFF switch shuts off entire unit, including heater circuit: Separate low water cutoff system protects heater and entire unit from damage. Installation 1. IMPORTANT TO ALLOW 6" CLEAR SPACE TO RIGHT ON CONTROL BOX FOR ACCESS. Urn should be level, both front to back and left to right. 2. CONNECT WATER LINE. 3/8" NPT water inlet located at right end. Provide shutoff valve and union in supply line near urn. Cold or hot water may be used, but hot water will give greater gallon per hour capacity. We strongly recommend the use of copper or aluminum tubing to provide flexibility and avoid strain on the unit. 3/8" O.D. Tubing is recommended. 3. CONNECT URN TO ELECTRIC POWER. Check to be sure that name plate marking of voltage phase and number of wires matches supply lines. Remove cover on control housing. Terminal block for line connections located in housing on right end. See drawing, as required. It is recommended that a fused disconnect switch be installed near urn. Urn body must be grounded either through metallic conduit or else by means of ground wire. An experienced electrician should be responsible for the installation of the unit, and its associated supply line. NOTE: Neutral wire required on all single phase and on 208 volt 3 phase power supplies to operate 120volt AC control circuit. Do not replace cover until completion of installation. 4. FILL WATER COMPARTMENT. Turn on water supply and electric service to urn. Turn master switch on. Do NOT turn on thermostat until water shows in gauge glass (approximately 6 minutes). When water shows, remove adhesive WARNING label from thermostat knob. Turn thermostat knob maximum clockwise to BREW position. Pilot light over knob should light showing heater power on. Water compartment will fill automatically to stop-full level, and should reach operating temperature approximately 45 minutes later. When the pointer on thermometer approaches the "W" in the blue BREW zone, unit is ready for operation. 5. REFILL RATE ADJUSTMENT. To gain maximum capacity of the boiler, and shorten heat recovery time, adjust the water inlet flow regulator (located inside the control box) according to the chart provided. Turning the threaded adjustment shaft clockwise increases the flow rate, counterclockwise will decrease it. Page 1 American Metal Ware Hot Water Boiler Installation (cont.) 5) TO CHECK REFILL RATE, allow water to fill to stop/full level automatically; then turn off master switch. Draw off 1 gallon of water from faucet. Turn master switch back on and time how long it takes for the water level to come up to stop/full mark again. Compare time with chart provided and adjust accordingly. TIME TO REFILL 1 GALLON HEATER SIZE (OR EQUIV. STEAM USE) COLD WATER* CONNECTION HOT WATER CONNECTION 5.5KW/208 Volt or 7KW/240 Volt 3min. 30sec. 1min. 25sec. 12KW 1min. 50 sec. 45sec. 15KW 1min. 25sec. 35sec. *Factory setting American Metal Ware Hot Water Boiler Page 2 Page 3 American Metal Ware Hot Water Boiler Page 3 American Metal Ware Hot Water Boiler Thermostat Factory set so that knob on BREW setting holds unit at brewing temperature toward HIGH end of brew zone on thermometer dial. Then, if turned back to HOLD position, thermostat should cycle on and off and hold at LOW 'end of BREW zone on thermometer. Thermostat Adjustment 1. If water temperature is below HIGH end of BREW zone on thermometer dial with knob on BREW setting, remove knob by pulling straight outward. Using a small screwdriver, insert in hole in center of shaft, turn slotted screw counter-clockwise until red pilot light goes on. Check to see that water in unit holds at HIGH end on BREW zone on thermometer and does not boil. 2. If water boils with thermostat knob set at the BREW position, remove knob by pulling straight outward. Using a small screwdriver, insert into hole in center of shaft, turn slotted screw clockwise until red pilot light goes out. Hold shaft so it does not turn while adjusting screw. Add cold water and check that heat comes back on (Pilot light glows), and that thermostat cycles at temperature at HIGH end of BREW zone on thermometer dial. If thermostat will not cycle, replace entire control. American Metal Ware Hot Water Boiler Page 4 Service Instructions PROBLEM: THERMOSTAT DIAL TURNED TO BREW AND WATER IN COMPARTMENT REMAINS COLD POSSIBLE CAUSE 1. No power at urn. 2. Power at urn, but no power at heater terminals. Check main switch, Check main fuses. (3 on 3 phase power, 2 on single phase power). Check that Pilot Light by On-Off switch is ON. Check control circuit fuse. Check that pilot light over thermostat dial ...
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