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®
BUNN
CRT5
CRTF5
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
10478.0000D 6/00 ©1996 Bunn-O-Matic Corporation
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INTRODUCTION This equipment will automatically brew a half-gallon batch of coffee into an awaiting dispenser. The brewer may include a hot water faucet for allied beverage use. It is only for indoor use on a sturdy counter or shelf. WARRANTY Bunn-O-Matic Corp. (“Bunn”) warrants the equipment manufactured by it to be commercially free from defects in material and workmanship existing at the time of manufacture and appearing within one year from the date of installation. In addition: 1.) Bunn war
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USER NOTICES Carefully read and follow all notices in this manual and on the equipment. All labels on the equipment should be kept in good condition. Replace any unreadable or damaged labels. # 00656.0000 # 00831.0000 # 00658.0000 # 12364.0000 # 00833.0000 10478 022800 Page 3
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ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up. L2 RED L2 RED WHITE 120V A.C. WHITE 208 or 240V A.C. NEUTRAL 120V A.C. 200 or 240V A.C. NEUTRAL L1 BLACK L1 BLACK 120V A.C. L1 BLACK “A" & "B” models require 2- Model 20 requires 2-wire, Model 35 requires 3-wire, wire, grounded service rated 200 grounded service rated 120 volts grounded service rated 120/208 or volts ac or 240 volts ac, 20 amp, ac, 20 amp, single phase, 60 H
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PLUMBING REQUIREMENTS (cont.) P2188 MODELS W/OUT FAUCET Models CRT5, CRT5A & CRT5B 1. Remove the shipping cap from the bulkhead fitting on the rear of the brewer. 2. Attach the flare fitting from the short piece of tubing on the flow control (supplied) to the water MODELS W/FAUCET & EXTERNAL inlet fitting at the rear of the brewer. FLOW CONTROL 3. Flush the water line and securely attach it to the flare fitting on the strainer/flow control. Models CRTF5, CRTF5A & CRTF5B 4. Turn on the water s
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INITIAL SET-UP CAUTION - The brewer must be disconnected from the power source throughout the initial set-up, except when specified in the instructions. 1. Insert an empty funnel into the funnel rails. 2. Place an empty dispenser under the funnel. 3. Place the heater switch at the rear of the brewer in the “OFF” lower position. 4. Connect the brewer to the power source, place the "ON/OFF" switch in the "ON" upper position, and momentarily press and release the start switch. Water will begin flo
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ADJUSTING BREW VOLUMES(cont) 2. Setting batch sizes. To set a batch volume, first check that the SET/LOCK switch is in the “SET” position on the circuit board. Press and hold the START or BREW switch until three distinct clicks are heard, and then release the switch. (Failure to release the switch within two seconds after the third click causes the volume setting to be aborted and previous volume setting will remain in memory). View the level of the liquid being dispensed. When the desired level
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TROUBLESHOOTING A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Technical Service Department. • Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel. • All electronic components have 120 volt ac and low voltage dc potential on their terminals. Shorting of terminals or the appl
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TROUBLESHOOTING (cont.) PROBABLE CAUSE REMEDY PROBLEM Brew cycle will not start (cont.) 3. ON/OFF Switch Refer to Service - ON/OFF Switch for testing. See page 17 4. Start Switch Refer to Service - Start Switch for testing procedures. See page 19 5. Timer Refer to Service - Timer for testing procedures. See page 25 or 27 6. Solenoid Valve Refer to Service - Solenoid Valve for testing procedures. See page 18 7. Water strainer/flow control (A) Direction of flow arrow must (.222 GPM) be pointing to
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TROUBLESHOOTING (cont.) PROBLEM REMEDY PROBABLE CAUSE 1. Strainer /flow control (.222 Inconsistent beverage level in (A) Direction of flow arrow must dispenser GPM) be pointing towards the brewer. (B) Remove the strainer/flow control and check for obstruc- tion. Clear or replace. 2. Syphon System The brewer must be level or slightly lower in front to syphon properly. 3. Lime Build-up Inspect the tank assembly for CAUTION - Tank and tank excessive lime deposits. Delime components should be delime
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Spitting or excessive steaming 2. Control Thermostat Refer to Service - Control (cont.) Thermostat for testing proce- dures. See page 14 Dripping from sprayhead 1. Syphon System The brewer must be level or slightly lower in front to syphon properly. 2. Lime Build-up Inspect the tank assembly for CAUTION - Tank and tank com- excessive lime deposits. Delime ponents should be delimed as required. regularly depending on local water conditions. Ex
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Weak beverage 1. Filter Type BUNN® paper filters must be used for proper extraction. 2. Coffee Grind A fine or drip grind must be used for proper extraction. 3. Sprayhead A six-hole stainless steel spray- head must be used for proper extraction. 4. Funnel Loading The BUNN® paper filter must be centered in the funnel and the bed of ground leveled by gentle shak- ing. 5. Water Temperature Place an empty funnel on an empty dispenser beneath the
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY 4. Tank Heater Brewer is making unusal noises Remove and clean lime off the (cont.) tank heater. See page 20 Low beverage serving tempera- 1. Warmer Refer to Service - Warmer element for testing procedures. ture See page 29 2. ON/OFF Switch Refer to Service - ON/OFF Switch for testing procedures. See page 17 10478 061500 Page 13
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SERVICE This section provides procedures for testing and replacing various major components used in this brewer should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem. WARNING - Inspection, testing, and repair of electri- cal equipment should be performed only by qualified service personnel. The brewer should be unplugged when servicing, except when electrical tests are re- quired and the test procedure specifically states to plug-in th
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SERVICE (cont.) CONTROL THERMOSTAT (cont.) Removal and Replacement: Test Procedures: 1. Disconnect the control thermostat wires. 1. Disconnect the brewer from the power source. 2. Remove the thermostat capillary bulb by firmly 2. Locate the blue wire on the control thermostat. pulling-up on the capillary at the tank lid. This will 3. Check the voltage across the blue wire on the disengage the grommet from the tank lid. control thermostat and the white insert on two 3. Remove the one #8-32 scr
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SERVICE (cont.) LIMIT THERMOSTAT If continuity is present as described, the limit thermo- stat is operating properly. If continuity is not present as described, replace the limit thermostat. Removal and Replacement: 1. Remove all wires from limit thermostat terminals. 2. Carefully slide the limit thermostat out from under the retaining clip and remove limit thermostat. 3. Carefully slide the new limit thermostat into the retaining clip. 4. Refer to the Fig. 5 when reconnecting the wires. BLU to
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SERVICE (cont.) ON/OFF WARMER SWITCH If continuity is not present as described, replace the switch. Removal and Replacement: 1. Remove the wires from the switch terminals. 2. Compress the clips inside the hood and gently push the switch through the opening. 3. Push the new switch into the opening and spread the clips to hold switch in the hood. 4. Refer to Fig.7 when reconnecting the wires. P939 WHI to Terminal Block (White Insert FIG. 6 ON/OFF WARMER SWITCHES on 120V or 120/240V Models) RED to
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SERVICE (cont.) SOLENOID VALVE 6. Check the solenoid valve for coil action. Connect the brewer to the power source. With "ON/OFF" switch in the "ON' upper position press start switch and listen carefully in the vicinity of the solenoid valve for a" clicking" sound as the coil magnet attracts. 7. Disconnect the brewer from the power source. If the sound is heard as described and water will not pass through the solenoid valve, there may be a blockage in the water line before the solenoid valve or
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SERVICE (cont.) START SWITCH If continuity is present as described, reconnect the blue wire and the white/red to the switch terminals. If continuity is not present as described, replace the switch. Removal and Replacement: 1. Remove the blue wire and white/red from the start switch. 2. Remove round retaining nut from the front of the switch and remove switch and internal tooth P1258.50 lockwasher from the inside of the hood. BREWERS W/FRESH LIGHT 3. Push new switch with internal tooth lockwashe
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SERVICE (cont.) TANK HEATER wire from the tank heater terminals. 5. Check for continuity across the tank heater termi- nals. If continuity is present as described, reconnect the wires, the tank heater is operating properly. If continuity is not present as described, replace the tank heater. NOTE- If the tank heater remains unable to heat, remove and inspect heater for cracks in the sheath. Removal and Replacement: 1. Disconnect the water supply tube from the fill basin. 2. Remove the tank inlet
