Bunn G9 HD User Manual

G9 HD
G9T HD
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OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
To obtain the Illustrated Parts Catalog, visit the Bunn-O-Matic website, at www.bunn.com. This is absolutely FREE,
and the quickest way to obtain the catalog. Contact Bunn-O-Matic Corporation at 1-800-286-6070 to obtain a paper
copy of the required Illustrated Parts Catalog mailed via U.S. Postal Service.
www.bunn.com
10171.0000M 04/07 © 1986 Bunn-O-Matic Corporation

Bunn G9 HD Specifications

General

Category	Coffee Maker
Manufacturer	Bunn
Model	G9 HD
Brewing Capacity	3.8 gallons per hour
Water Source	Plumbed
Voltage	120V
Material	Stainless Steel
Water Tank Capacity	N/A (Plumbed-in)
Tank	N/A (Plumbed-in)
Warranty	2 years
Type	Commercial Coffee Maker

Summary

Introduction

Bunn-O-Matic Commercial Product Warranty

User Notices

WARNING (Electrical Safety)

General warnings about electrical hazards, opening covers, and authorized service.

CAUTION (Personal Injury Hazard)

Personal injury hazard warning for keeping fingers and objects out of openings.

WARNING (Extension Cord Use)

Electrical safety precautions including circuit protection, grounding, and extension cord use.

Electrical Requirements

Initial Set Up

Operating Controls

Off/On/Start Switch

Controls the grinder's operation: off, on, and momentary start for timed cycles.

Batch Selector Switch (Optional)

Selects grind amount for different batch sizes (Urn or Carafe).

Cleaning

Coffee Grinding

Adjustments

Burr Adjustment

Procedure to adjust the grind fineness by altering the burr settings.

Burr Adjustment (continuation)

Further steps for adjusting grind fineness using hash marks and lock nuts.

Timer Adjustment

Procedure to adjust the timer for the desired amount of coffee to be ground.

Troubleshooting

Grinder Not Starting: Motor Overload Protector

Addresses the grinder not starting due to motor overload protection reset.

Grinder Not Starting: No Power or Incorrect Voltage

Troubleshooting no power or incorrect voltage issues when the grinder fails to start.

Grinder Not Starting: Off/On/Start Switch

Checks the Off/On/Start switch as a cause for the grinder not starting.

Grinder Not Starting: Timer

Checks the timer as a potential cause for the grinder not starting.

Grinder Not Starting: Relay

Troubleshoots the relay as a reason for the grinder failing to start.

Grinder Not Starting: Motor

Identifies motor issues as a cause for the grinder not starting.

Grinder Not Shutting Off: Off/On/Start Switch

Addresses the grinder not shutting off due to the Off/On/Start switch.

Grinder Not Shutting Off: Timer

Checks the timer as a cause for the grinder not shutting off.

Grinder Not Shutting Off: Relay

Troubleshoots the relay for the grinder failing to shut off.

Grinder Starts, Won't Dispense: Hopper Issues

Checks hopper for obstructions or foreign materials preventing dispensing.

Incorrect Coffee Amount: Timer Adjustment

Addresses incorrect coffee amounts due to timer adjustment issues.

Incorrect Coffee Grind: Burr Adjustment

Solves incorrect grind fineness by referring to burr adjustment.

Service

Component Access

Details how to access internal components by removing panels and covers.

Motor

Procedures for testing and replacing the motor.

Motor (Grind Chamber Components)

Procedures for motor replacement and grind chamber component inspection/replacement.

Removal and Replacement - GRIND CHAMBER

Steps to remove and replace grind chamber components like burrs and shear plate.

Off/On/Start Switch

Procedures for testing and replacing the Off/On/Start switch.

Urn/Carafe Switch

Procedures for testing and replacing the Urn/Carafe selector switch.

Relay

Procedures for testing and replacing the relay.

Timer

Procedures for testing and replacing the timer.

Wiring Diagram

SCHEMATIC WIRING DIAGRAM G9

Electrical schematic for the G9 grinder model.

SCHEMATIC WIRING DIAGRAM G9-URN/CARAFE

Electrical schematic for the G9-URN/CARAFE grinder model.

SCHEMATIC WIRING DIAGRAM G9A HD (200V AC)

Electrical schematic for the G9A HD grinder (200V AC).

SCHEMATIC WIRING DIAGRAM G9A HD (Power Indicator)

Electrical schematic for G9A HD with power indicator light (200V AC).

SCHEMATIC WIRING DIAGRAM G9 (Optional Switches)

Electrical schematic for the G9 grinder model with optional switches.

SCHEMATIC WIRING DIAGRAM G9 (Brewer Interface)

Electrical schematic for G9 with optional brewer interface connector.