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! WARNING
DISCONNECT FROM POWER SOURCE
BEFORE REMOVAL OF ANY PANEL OR
REPLACEMENT OF ANY COMPONENT!
®
BUNN
H5E
H5X
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
10420.0000G 7/00 © 1989 BUNN-O-MATIC CORPORATION
! WARNING
Very Hot Water
Use With Care!
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CONTENTS Introduction ................................................. 2 Warranty ...................................................... 2 User Notices ................................................ 3 Electrical Requirements ............................... 4 Plumbing Requirements .............................. 4 Initial Set-Up................................................ 5 Draining the Dispenser ................................ 5 Cleaning....................................................
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USER NOTICES The notices on this dispenser should be kept in good condition. Replace unreadable or damaged labels. 12593.0000 00831.0000 00656.0000 10044.0000 10420 072500 3
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O N trical codes. mbustibles. O COMPLY RISKS EQUIPMENT MAGE, FIRE, OR SHOCK HAZARD READ THE ENTIRE OPERATING MANUAL INCLUDING THE LIMIT OF WARRANTY AND LIABILITY BEFORE BUYING OR USING THIS PRODUCT THIS APPLIANCE IS HEATED WHENEVER CONNECTED TO A POWER SOURCE 00831.0000A 5/88 © 1988 BUNN-O-MATIC CORPORATION This equipment is to be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International, Inc. (BOCA) and the Food Service Sanitation Manual
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O N N O ! CAUTION DO NOT Turn On The Tank Heater Switch Until Water Comes From Opened Faucet! Hot Water Systems – Water Tank Will Fill Automatically When Unit Is Connected To Power! Coffee Brewers – Fill The Water Tank In Accordance With The Installation Instructions! Failure To Comply Voids Warranty! WARNING HAZARDOUS VOLTAGE DISCONNECT FROM POWER SOURCE BEFORE REMOVING! INITIAL SET-UP CAUTION - The dispenser must be disconnected from the power source throughout the initial set-up, except when
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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 Tech- nical Service Department. • Inspection, testing, and repair of electrical equipment should be performed only by qualified service person- nel. • All electronic components have 120 – 240 volt ac and low voltage dc potential on their terminals. Shorting of terminals or
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Automatic refill will not operate 1. No water Check plumbing and shut-off valves. after drawing hot water. 2. Water strainer/flow control (A) Direction of flow arrow must be point- ing towards dispenser. (B) Remove the strainer/flow control and check for obstructions. Clear or replace. 3. Safety overflow switch Refer to Service – safety overflow switch for testing procedures. See page 17. 4. Liquid level system Refer to Service – electronic c
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TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Water boils continuously. 1. Temperature control Refer to Service – electronic controls for testing procedures. See page 10. 2. Lime build-up Inspect the tank assembliy for excess lime deposits. Delime as required. CAUTION – Tanks and tank components should be delimed reglarly depending on local water conditions. Exces- sive mineral build-up on stainless steel surfaces can initiate corrosive reactions resulting in serious leaks. Dispenser is
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O O O N N N N N N O O O ill i i i i ll i l t ! . A / B - - A IC C P A I ! CAUTION DO NOT Until Water Comes From Opened Fau Turn On The Tank Heater Switch cet! Hot Water Systems – Water Tank W F ll Au tomatically When Un t Is Connected To Power! A Cco cff ord eean Bc re e w W ers th T –h F e I ll ns Thta e W atat on e I r T ns atr nu k cti Inons! Failure To Comp y Voids Warran y WARNING HAV ZA OR LT DA OG UE S DISCONNECT FROM POWER SOURCE BEFORE REMOVING! ! WARNING Fill water tank before
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O N N O ! CAUTION DO NOT Turn On The Tank Heater Switch Until Water Comes From Opened Faucet! Hot Water Systems – Water Tank Will Fill Automatically When Unit Is Connected To Power! Coffee Brewers – Fill The Water Tank In Accordance With The Installation Instructions! Failure To Comply Voids Warranty! WARNING HAZARDOUS VOLTAGE DIS P C O O W NE N R E S CT O U FR RO CM E BEFORE REMOVING! SERVICE (cont.) Electronic Controls .0000 12561.0000 12565.0002 M2522.1000 P1772 01520.0000 00971.0000 FIG. 1
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SERVICE (cont.) tronic control assembly. 5. Check the voltage across terminals 1 & 4 of the Electronic Controls (cont.) electronic control assembly with a voltmeter. Con- Liquid Level Control Test Procedure nect the dispenser to the power source. The indi- cation must be: 1. Disconnect the dispenser from the power source. a.) 100 to 120 volts ac for 100 to 120 voltmodels 2. Check the voltage across terminals 3 & 4 of the or electronic control assembly with a voltmeter. Con- b.) 200 to 240 volt
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SERVICE (cont.) If voltage was present as described, reinstall the probe, Electronic Controls (cont.) the sensing function of the system is operating prop- erly. 7. Reconnect the pink wire to terminal 5 of the elec- If voltage was not present as described, check the pink tronic control assembly. probe wire and the green ground wire for continuity 8. Loosen the compression fitting, remove the probe and/or replace the probe. from the tank lid, and inspect it for mineral depos- its. Replace it if
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SERVICE (cont.) Electronic Controls (cont.) to a temperature sensor. Both components MUST be replaced as a set. If the indicator was on or blinking, the temperature sen- 10. Check the voltage across the tank heater terminals sor is operating properly, proceed to #7. with a voltmeter. Connect the dispenser to the If the indicator was off, check the sensor connection power source. The indication must be: on the electronic control circuit board and/or replace a.) 100 to 120 volts ac for 100 to 120
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SERVICE (cont.) 8. Reconnect the wires. Electronic Controls (cont.) 9. Review the initial set-up procedures. Electronic Controls Removal and Replacement Triac Assembly Removal and Replacement NOTE - Each electronic control assembly is calibrated NOTE - Each triac installation requires the use of an to a temperature sensor probe. Both components MUST be replaced as a set. approved silicone heat sink compound. Bunn-O-Matic recommends the use of Dow Corning 340 compound or 1. Remove all wires from
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SERVICE (cont.) 4. Take the temperature of the stream of water imme- diately below the faucet as it flows from the dis- Electronic Controls (cont.) penser with an accurate thermometer. Do not take the temperature of water collected in a container. Adjustments 5A. TO INCREASE THE TEMPERATURE This dispenser can maintain any temperature between Turn the potentiometer screw of the temperature 85 and 208°F by selecting and setting one of five vari- range selected in step 2 in a clockwise direction a
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O N SERVICE (cont.) Limit Thermostat If voltage was present as described, reconnect the black Location: wire and proceed to #5. The limit thermostat is located on the tank lid. If voltage was not present as described, refer to the To test the limit thermostat, access will also be needed Wiring Diagrams and check the dispenser wiring har- to the terminal block located at the rear of the dispenser. ness. 5. Check for continuity across the terminals of the limit thermostat. If continuity is not pre
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O N N O ! CAUTION DO NOT Turn On The Tank Heater Switch Until Water Comes From Opened Faucet! Hot Water Systems – Water Tank Will Fill Automatically When Unit Is Connected To Power! Coffee Brewers – Fill The Water Tank In Accordance With The Installation Instructions! Failure To Comply Voids Warranty! SERVICE (cont.) Removal and Replacement: 1. Disconnect the black wires from the safety over- Safety Overflow Switch flow switch. 2. Remove the nut beneath the copper overflow cup. 3. Remove the en
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! WARNING Fill wat er t ank bef ore t urni ng -on t h te o rp moo w se t a r ts o oru c rc oe n.necti ng appli ance Use onl y on a properl y prot ect ed ci rcuit capabl e of t he rat ed l oad. El ect ri call y ground t he chassi s. Foll ow nati onal/l ocal el ect ri cal codes. Do not use near combusti bl es. FAILD UA R M EA T G O E ,C F O IM RE P,L O Y R R IS S H KO SC E K Q H UA IP ZM AR EN DT READ THE ENTIRE OPERATING MANUAL LIAB IIL NC ITLY U B DE IN FG O T RE H E B U LIY M IN IT G O O FR W U
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O N N O ! CAUTION DO NOT Turn On The Tank Until Water Comes F Hot Water S Automati SERVICE (cont.) Tank Heater Location: Removal and Replacement: The tank heater is located in the tank lid. 1. Remove the wires to the tank heater. 2. Remove the 8-32 nuts from the tank heater flange. 3. Remove the tank heater. 4. Inspect the tank heater gasket and replace if nec- essary. 5. Securely install the new tank heater. Be certain of a watertight seal. 6. Reconnect the wires, FIG. 13. BLU to Triac Assy BL
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WIRING DIAGRAMS SCHEMATIC WIRING DIAGRAM H5X L1 N GRN LIMIT TRIAC THERMOSTAT BLK BLK BLU WHI/VIO W TANK HEATER W H TAN H t° HEATER REFILL I I BLU 7 PNK WHI/BRN 6 G TANK GRY R HEATER Y PNK PNK 20 SW (PROBE) PNK 5 ELECTRONIC WHI 4 PNK CONTROL 3 ASSY 2 GRY GRY WHI/BLU WHI SOL 1 POWER READY GRN G R G t° Y R SAFETY Y SW BLK RED RED BLK 100-120 VOLTS A C 2 WIRE 10410.0000E 6/91 © 1989 BUNN-O-MATIC CORPORATION SINGLE PHASE L1 L2 GRN/YEL LIMIT TRIAC THERMOSTAT WHI/VIO BLK BLK BLU TANK HEATER W
