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COLD DRAFT
Cold Brew and Nitro Coffee Dispenser
NGM (Nitron Gas Module)
NGM
INSTALLATION & OPERATING GUIDE
For Technical Service, contact Bunn-O-Matic Corporation at 1-800-286-6070.
Bunn-O-Matic Corporation
Post Office Box 3227, Springfield, Illinois 62708-3227
Phone (217) 529-6601 | Fax (217) 529-6644
www.bunn.com
56126.0002 E 05/25 © 2019 - 2025 Bunn-O-Matic Corporation
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Summary of Contents for Bunn nitron2 NGM
- Page 1 NGM (Nitron Gas Module) INSTALLATION & OPERATING GUIDE For Technical Service, contact Bunn-O-Matic Corporation at 1-800-286-6070. Bunn-O-Matic Corporation Post Office Box 3227, Springfield, Illinois 62708-3227 Phone (217) 529-6601 | Fax (217) 529-6644 www.bunn.com 56126.0002 E 05/25 © 2019 - 2025 Bunn-O-Matic Corporation...
- Page 2 BUNN’S SOLE OPTION AS SPECIFIED HEREIN, TO REPAIR, REPLACEMENT OR REFUND. In no event shall BUNN be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment,...
- Page 3 CONTENTS BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY ..................2 USER NOTICES ................................3 NORTH AMERICAN REQUIREMENTS ........................4 CE REQUIREMENTS ..............................4 INTRODUCTION ...............................5 SITE REQUIREMENTS .............................5 ELECTRICAL REQUIREMENTS ..........................5 Grounding Instructions ............................5 NGM INSTALL & OPERATION CHECKLIST ......................6 NGM INITIAL SETUP INSTRUCTIONS ........................6 Steps for models with an LED Light ........................7 N2 GAS CYLINDER REMOVAL INSTRUCTIONS ....................8...
- Page 4 NORTH AMERICAN REQUIREMENTS • This appliance must be installed in locations where it can be overseen by trained personnel. • For proper operation, this appliance must be installed where the temperature is between 41°F to 90°F (5°C to 32°C). • For proper operation, this appliance must be installed where humidity is 50%. •...
- Page 5 INTRODUCTION The Nitron Gas Module (NGM) is specifically designed to work with up to two Nitron Cold Draft dispensers. It supplies an unlimited amount of gas without the need to change-out or refill a nitrogen gas cylinder to support the nitrogenization process, resulting in a Nitro Cold Brew beverage that’s crowned with a smooth, silky stout-like collar/foamy head.
- Page 6 NGM INSTALL & OPERATION CHECKLIST □ Environment around Nitron Gas Module must be below 90° Fahrenheit. □ Nitron Gas Module cannot be near other appliances that may emit gasses, oils, or other fluids. □ Nitron Gas Module vents on the side must not get blocked by other objects. □...
- Page 7 NGM INITIAL SETUP INSTRUCTIONS continued from previous page 1 NITRON 2 NITRON DISPENSER DISPENSERS Fig.1-1 Fig.1-2 5. Wait a few seconds for the NGM to pressurize the line between the NGM and Nitron dispenser and shut off. Check for leaks. Steps for models with an LED Light Before installing a door cover or an existing door cover on a Nitron dispenser, disable the red LED indicator light (for an empty N2 tank) mounted on the inner door by disconnecting the connectors.
- Page 8 Nitrogen cylinders will have a DOT label identifying the gas and hazards. 1. Locate the N supply cylinder and verify it only supplies nitrogen to the BUNN Nitron2 Cold Draft dispenser only. 2. Turn the main cylinder On/Off valve to the Off position.
- Page 9 PREVENTIVE MAINTENANCE In order to maintain proper operation and long service life, BUNN requires an annual PM if the NGM is placed in an ideal environment as laid out in the Site Requirements. The PM should take place in conjunction with the Nitron dispenser’s PM schedule.
- Page 10 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.
- Page 11 TROUBLESHOOTING PROBLEM PROBABLE CAUSE REMEDY Excess noise from the Nitron Gas 1. Hose connection leaking. Inspect entire pressurized line Module. from Nitron Gas Module to the nitron2 Cold Draft dispenser. 2. Improper placement on a Ensure proper Nitron Gas Module unstable surface.
- Page 12 TROUBLESHOOTING A NITROGEN GAS LEAK BASIC NITROGEN GAS MODULE OPERATION: The normal operation of a Nitrogen Gas Module installed to a nitron dispenser pressurizes the Gas Module outlet gas line and the gas line inside the nitron dispenser fairly quickly. When the pressure switch inside the Gas Module is satisfied, the Gas Module will shut off.
- Page 13 TROUBLESHOOTING A NITROGEN GAS LEAK INSTRUCTIONS FOR NGM SYSTEM LEAK Test Procedure 2: Outlet 1. Disconnect power from NGM. Gas Fitting 2. Disconnect gas tube assembly from NGM Nylon outlet fitting. Seal NOTE: Is nylon seal present after disconnecting tube assembly from NGM fitting? Flare 3.
- Page 14 TROUBLESHOOTING A NITROGEN GAS LEAK INSTRUCTIONS FOR NITRON DISPENSER SYSTEM LEAK Test Procedure 3: 1. Disconnect power from NGM. 2. Dispense a Nitro drink from dispenser to relieve gas pressure. 3. Disconnect power to Nitron Dispenser. Flare Seal 4. Disconnect gas tube assembly from Nitron 5.
- Page 15 120 VOLT MODELS SCHEMATIC WIRING DIAGRAM NITRON GAS MODULE 120V MODELS BLU/BLK PRESSURE FUSE SWITCH N.C. SOLENOID VALVE RED/BLK 4 PIN CONNECTOR MOTOR START CAPACITOR PUMP 120 VOLTS AC 2 WIRE SINGLE PHASE 60Hz 07/22 Rev B © 2018 BUNN-O-MATIC CORPORATION...
- Page 16 220-240 VOLT MODELS SCHEMATIC WIRING DIAGRAM NITRON GAS MODULE 220-240V MODELS FILTER BLU/BLK PRESSURE FUSE SWITCH N.C. SOLENOID VALVE RED/BLK 4 PIN CONNECTOR MOTOR START CAPACITOR PUMP 220-240 VOLTS AC 2 WIRE SINGLE PHASE 50-60Hz 07/22 Rev B © 2018 BUNN-O-MATIC CORPORATION...
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