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Bunn CRT5 CRTF5 - page 1
CR T5 CR TF5 ...
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Bunn CRT5 CRTF5 - page 2
Page 2 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 ...
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Bunn CRT5 CRTF5 - page 3
Page 3 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. # 12364.0000 ...
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Bunn CRT5 CRTF5 - page 4
Page 4 ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up. Model 35 requires 3-wire, grounded service rated 120/208 or 120/240 volts ac, 20 amp, single phase, 60 Hz. Proceed as follows: Model 20 requires 2-wire, grounded service rated 120 volts ac, 20 amp, single phase, 60 Hz. P ...
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Bunn CRT5 CRTF5 - page 5
Page 5 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 inlet fitting at the rear of the brewer. 3. Flush the water line and securely attach it to the flare fitting ...
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Bunn CRT5 CRTF5 - page 6
Page 6 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. Conne ...
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Bunn CRT5 CRTF5 - page 7
Page 7 10478 061500 2. Setting batch sizes. T o set a batch volume, first check that the SET/LOCK switch is in the “SET” position on the circuit board. Press and hold the ST AR T 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 v ...
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Bunn CRT5 CRTF5 - page 8
Page 8 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 ...
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Bunn CRT5 CRTF5 - page 9
Page 9 TROUBLESHOOTING (cont.) Brew cycle will not start (cont.) Water is not hot PROBABLE CAUSE REMEDY 3. ON/OFF Switch 4. Start Switch 5. Timer 6. Solenoid Valve 7. Water strainer/flow control (.222 GPM) 1. Tank Heater Switch 2. (A) Limit Thermostat (B) Thermal Cut-Off (Brewers with Faucet) CAUTION - Do not eliminate or bypass limit thermostat or ...
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Bunn CRT5 CRTF5 - page 10
Page 10 TROUBLESHOOTING (cont.) Inconsistent beverage level in dispenser Consistently low beverage level in the dispenser Spitting or excessive steaming 1. Strainer /flow control (.222 GPM) 2. Syphon System 3. Lime Build-up CAUTION - Tank and tank components should be delimed regularly depending on local water conditions. Excessive mineral build-up ...
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Bunn CRT5 CRTF5 - page 11
Page 11 TROUBLESHOOTING (cont.) Spitting or excessive steaming (cont.) Dripping from sprayhead Water flows into tank continu- ously (ON/OFF Switch "ON") Water flows into tank continu- ously (ON/OFF Switch "OFF") Beverage overflows dispenser 2. Control Thermostat 1. Syphon System 2. Lime Build-up CAUTION - Tank and tank com- pone ...
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Bunn CRT5 CRTF5 - page 12
Page 12 TROUBLESHOOTING (cont.) Weak beverage Dry coffee grounds remain in the funnel Brewer is making unusal noises 1. Filter Type 2. Coffee Grind 3. Sprayhead 4. Funnel Loading 5. Water Temperature 1. Funnel Loading 1. Solenoid 2. Plumbing Lines 3. Water Supply 10478 022800 PROBLEM PROBABLE CAUSE BUNN® paper filters must be used for proper extra ...
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Bunn CRT5 CRTF5 - page 13
Page 13 TROUBLESHOOTING (cont.) Brewer is making unusal noises (cont.) Low beverage serving tempera- ture 4. Tank Heater 1. Warmer 2. ON/OFF Switch Remove and clean lime off the tank heater. See page 20 Refer to Service - Warmer element for testing procedures. See page 29 Refer to Service - ON/OFF Switch for testing procedures. See page 17 10478 06 ...
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Bunn CRT5 CRTF5 - page 14
Page 14 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 pe ...
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Bunn CRT5 CRTF5 - page 15
Page 15 SERVICE (cont.) Test Procedures: 1. Disconnect the brewer from the power source. 2. Locate the blue wire on the control thermostat. 3. Check the voltage across the blue wire on the control thermostat and the white insert on two pole 120 volt terminal block or three pole 120/240 volt terminal blocks and the red insert on two wire 200 volt or ...
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Bunn CRT5 CRTF5 - page 16
Page 16 SERVICE (cont.) LIMIT THERMOSTAT Location: The limit thermostat is located inside the rear of the hood on the tank lid. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the blue and black wires from the limit thermostat. 3. Check for continuity across the limit thermostat terminals with a ohmmeter. P1800 ...
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Bunn CRT5 CRTF5 - page 17
Page 17 Location: The ON/OFF switch(s) are located on the front of the hood. Test Procedure: 1. Disconnect the brewer from the power source. 2. Viewing the switch from the back remove the white or red wire from the upper terminal and the black wire from the center terminal. 3. Check the voltage across the white wire or red wire and the black wire w ...
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Bunn CRT5 CRTF5 - page 18
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Bunn CRT5 CRTF5 - page 19
Page 19 SERVICE (cont.) START SWITCH Location: On brewers w/out fresh light the start switch is located in the right front of the hood. On brewers w/fresh light the start switch is located on the right side of the hood. Test Procedure: 1. Disconnect the brewer from the power supply. 2. Disconnect the blue wire and the white/red wire from the switch ...
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Bunn CRT5 CRTF5 - page 20
Page 20 SERVICE (cont.) TANK HEATER Location: The tank heater is located inside the tank and secured to the tank lid. Test Procedures: 1. Disconnect the brewer from the power supply. 2. Check the voltage across the black and white wires on 120 volt models or the black and red wires for 120/240 volt models, 200 volt models and 240 volt models with a ...
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Bunn CRT5 CRTF5 - page 21
Page 21 SERVICE (cont.) TANK HEATER (Cont.) P1168.71 FIG. 13 TANK HEATER TERMINALS 10478 061500 13. Secure sprayhead tube to hood using a hex nut. 14. Install sprayhead. 15. Reconnect the wires to the limit thermostat, tank heater and control thermostat. See limit thermo- stat and control thermostat sections in this manual when reconnecting wires. ...
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Bunn CRT5 CRTF5 - page 22
Page 22 SERVICE (cont.) TANK HEATER SWITCH Location: The tank heater switch is located on the rear of the brewer on the upper left side of the trunk. Test Procedure: 1. Disconnect the brewer from the power source. 2. Disconnect the black wire from the limit thermo- stat. 3. With the tank heater switch in the "ON" positionand with a voltme ...
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Bunn CRT5 CRTF5 - page 23
Page 23 SERVICE (cont.) TANK HEATER SWITCH (cont.) P1135.80 FIG. 15 TANK HEATER SWITCH TERMINALS 10478 061500 14. Reconnect the two black wires to the tank heater switch terminals. 15. Set tank assembly inside the hood on mounting brackets and secure with two #8-32 screws. 16. Reconnect the wires to the limit thermostat, tank heater and the control ...
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Bunn CRT5 CRTF5 - page 24
Page 24 Location: The thermal cut-off is located inside the hood connected to the tank heater. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the thermal cut-off from the tank heater and the black wire from the control thermostat. 3. Check for continuity across thermal cut-off termi- nals with an ohmmeter. THERMAL CU ...
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Bunn CRT5 CRTF5 - page 25
Page 25 SERVICE (cont.) TIMER (Early Models) Location: The timer is located inside the front of the trunk on the upper right side of component bracket. Test Procedure. 1. Disconnect the brewer from the power source. 2. Disconnect the polarized, three pin connector from the brewer wiring harness and rotate the brew timer dial fully counterclockwise. ...
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Bunn CRT5 CRTF5 - page 26
Page 26 SERVICE (cont.) TIMER (cont.) P1136 FIG. 19 TIMER TERMINALS 10478 061500 If voltage is present as described, the brew timer is operating properly. Reset the timer dial as required, to obtain the desired brew volume. If voltage is not present as described, replace the timer. Removal and Replacement: 1. Separate all connectors between the bre ...
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Bunn CRT5 CRTF5 - page 27
Page 27 DIGITAL BREW TIMER (Late Models) ...
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Bunn CRT5 CRTF5 - page 28
Page 28 4. Attach all wires to the replacement timer board prior to installation to the component mounting bracket. Refer to FIG. 21 when reconnecting the wires. 5. Install new circuit board with spacers (as re- quired) to the component mounting bracket. 6. Adjust the timer as described below. T imer Setting: NOTE: Prior to setting or modifying vol ...
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Bunn CRT5 CRTF5 - page 29
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Bunn CRT5 CRTF5 - page 30
L1 BLK WHI BLK BLK BLK BLK BLK VIO BRN/BLK YEL WHI/VIO LEFT FRONT WARMER LEFT REAR WARMER RIGHT FRONT WARMER RIGHT REAR WARMER BLK BLK TA N K HEA TER WHI (MODEL 20) NL 2 RED (MODEL 35) GREEN WHI WHI WHI WHI WHI WHI WHI WHI WHI WHI WHI/GRN WHI/BLU LOWER CENTER WARMER BLU WHI/RED WHI/RED WHI/RED ST ART SWITCH SOL T2 T4 T3 T5 T1 BREW TIMER BLU LIMIT T ...
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Bunn CRT5 CRTF5 - page 31
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Bunn CRT5 CRTF5 - page 32
L1 BLK BLK WHI/RED WHI/RED WHI/RED BLK YEL WHI/VIO BRN/BLK VIO BLK BLK BLK LOWER CENTER WARMER ON/OFF SWITCH ON/OFF SWITCH ON/OFF SWITCH ON/OFF SWITCH ON/OFF SWITCH BLK BLK GREEN TANK HEATER WHI L2 WHI WHI WHI WHI WHI WHI WHI WHI WHI SOL BLU START SWITCH T1 T5 T3 T4 T2 WHI/BLU BREW TIMER LEFT FRONT WARMER LEFT REAR WARMER RIGHT FRONT WARMER RIGHT R ...
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