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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. BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows: 1) All equipment other than as specified below: 2 years parts and 1 year labor. 2) Electronic circuit and/or control boards: parts and labor for 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 (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.) 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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