Instruction/ maintenance manual of the product GMB-PS Bunn
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OPERA TING & SER VICE MANU AL B UNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 F AX: (217) 529-6644 27479.0000D 12/00 ©1996 Bunn-O-Matic Corporation GMB-PS C A U T IO N D I S C A R D D E C A N T E R I F : .
Page 2 INTRODUCTION This equipment will brew a half-gallon batch of coffee into an awaiting dispenser at the push of a button and includes 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.
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.
Page 4 ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up. Model 15 has an attached cordset and requires 2-wire grounded service rated 120 volts ac, 15 amp, single phase, 60 Hz.
Page 5 1. Attach the flare fitting from the short piece of tubing on the strainer (supplied) to the water inlet fitting at the left rear of the brewer. 2. Flush the water line and securely attach it to the flare fitting on the strainer. 3. Turn on the water supply.
Page 6 27479 121500 T o decrease a batch size. Press and release the ST ART or BREW switch once for every two-second inter val to be removed from the total brew time period; then immediately press and hold down the ST ART or BREW switch until three clicks are heard.
Page 7 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.
Page 8 TROUBLESHOOTING (cont.) Brew cycle will not start (cont.) Water is not hot PROBABLE CAUSE REMEDY Refer to Service - ON/OFF Switch for testing. See page 16 Refer to Service - Start Switch for testing procedures. See page 18 Refer to Service - Timer for testing procedures.
Page 9 TROUBLESHOOTING (cont.) PROBLEM Inconsistent beverage level in dis- penser Consistently low beverage level in the dispenser PROBABLE CAUSE 1. Flow control (.175 GPM) 2. Strainer 3. Syphon System 4. Lime Build-up CAUTION - Tank and tank compo- nents should be delimed regularly depending on local water condi- tions.
Page 10 TROUBLESHOOTING (cont.) PROBLEM Consistently low beverage level in the dispenser (cont.) Spitting or excessive steaming Dripping from sprayhead Water flows into tank continuously (ON/OFF Switch "ON") PROBABLE CAUSE 3.
Page 11 TROUBLESHOOTING (cont.) PROBLEM Water flows into tank continuously (ON/OFF Switch "OFF") Beverage overflows dispenser Weak beverage PROBABLE CAUSE 1. Solenoid Valve 1. Dispenser 2. Timer 3. Solenoid Valve 1. Filter Type 2. Coffee Grind 3.
Page 12 TROUBLESHOOTING (cont.) PROBLEM Dry coffee grounds remain in the funnel Brewer is making unusal noises PROBABLE CAUSE 1. Funnel Loading 1. Solenoid Valve 2. Plumbing Lines 3. Water Supply 4. Tank Heater REMEDY The BUNN ® paper filter must be centered in the funnel and the bed of grounds leveled by gently shak- ing.
Page 13 C A U TIO N DISCARD DECANTER IF: . C R A C K E D . S C R A T C H E D . B O IL E D D R Y . H E A T E D W H E N E M P T Y . U S E D O N H IG H F L A M E .
Page 14 O N O F F S T A R T SERVICE (cont.) CONTROL THERMOSTAT Location: The control thermostat is located inside the hood on the right side. Test Procedures: 1.
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Page 16 ON OFF START B U N N 90 psig max operating pressure S trainer/Flow Control # 24222.0222 R epl. Flow W asher #20526.0222 ) (Repl. Screen #23721.0000) .222 gpm FLOW SERVICE (cont.) ON/OFF SWITCH Location: The ON/OFF switch is located on the left front of the hood.
Page 17 SERVICE (cont.) SOLENOID VALVE Location: The solenoid valve is located inside the bottom right side of the trunk mounted on the base. Test Procedures: 1. Disconnect the brewer from the power source. 2. Disconnect the white/red and white/green wires from the solenoid valve.
Page 18 SERVICE (cont.) START SWITCH Location: The start switch is located in the right front of the hood just to the left of faucet. Test Procedure: 1. Disconnect the brewer from the power supply. 2. Disconnect the white/orange wire from the top switch terminal and the white/yellow from the bottom switch terminal.
Page 19 O N O F F S T A R T 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.
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Page 21 SERVICE (cont.) 27479 091596 DIGITAL TIMER (Late Models).
Page 22 27479 121500 T o increase a brew volume, place the ON/OFF switch in the "ON" position, press and hold the ST ART switch until three clicks are heard.
Page 23 27479 091596.
Page 24 27479 091596.
An important point after buying a device Bunn GMB-PS (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Bunn GMB-PS yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Bunn GMB-PS - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bunn GMB-PS you will learn all the available features of the product, as well as information on its operation. The information that you get Bunn GMB-PS will certainly help you make a decision on the purchase.
If you already are a holder of Bunn GMB-PS, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Bunn GMB-PS.
However, one of the most important roles played by the user manual is to help in solving problems with Bunn GMB-PS. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bunn GMB-PS along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
