Gasmaster GMI 2M User Manual (English)

Katie LutzAug 9, 2025

What to do if my Gasmaster GMI 2M Boiler unit does not start?

M
Michael BrownAug 9, 2025
If your Gasmaster Boiler unit doesn't start, the issue could be due to several reasons. First, check if the blower is running. If not, refer to the troubleshooting steps for the blower. Another potential cause is an open air pressure switch on the housing, which can be resolved by adjusting the switch. Also, verify the gas pressure switch; if it's open, consider replacing it if defective. Similarly, if there's no ignition, try adjusting the switch. For further troubleshooting, consult page 20 of the Riello catalogue for burner trouble controller troubleshooting.

Gas Type	Natural Gas, LPG
Gas Detection Range	0-100% LEL
Operating Temperature	-20°C to +50°C
Power Supply	24 VDC
Output Signal	4-20 mA

Gas Type

Natural Gas, LPG

Gas Detection Range

0-100% LEL

Operating Temperature

-20°C to +50°C

Power Supply

24 VDC

Output Signal

4-20 mA

Summary

Introduction to Gasmaster Boilers

Boiler and Water Heater Description

Detailed description of the Gasmaster GMI 2M (2ML) boiler and water heater's construction and heat exchange mechanism.

Control System Operation

Explains the boiler's control module, temperature sensing, and servomotor operation for regulating gas and air mixture.

Essential Safety Features

Lists and describes key safety features including low water cut-off, flame sensor, high temperature limit, air pressure, and relief valve.

Gas Line System Overview

Introduces the gas lines section, detailing pilot and main gas line configurations and safety measures.

Gas Manifold and Control Assembly Testing

Information on factory testing of gas manifold and control assembly according to ANSI standards.

Installation Code Compliance

Outlines installation requirements for Canada and the USA, including electrical and plumbing codes.

Freeze Protection Measures

Instructions on isolating and draining the boiler for freeze protection or using antifreeze for short-term storage.

Water Treatment Recommendations

Discusses the stainless steel construction, self-cleaning properties, and recommendations for soft water use.

Installation Guide

Boiler/Water Heater Package Contents

Lists the components included with each unit, such as burner, manifolds, safety switches, and gauges.

Site and Component Installation

Provides guidelines for boiler location, placement, clearances, and installation of the pressure relief valve.

System Connections (Water, Gas, Condensate)

Details water, condensate, and gas line connections, including required codes, pressure settings, and installation methods.

Vent Connection Requirements

Instructions for connecting the vent, compliance with codes, and notes on equivalent lengths and exhaust venting.

General Installation Instructions

General instructions regarding pressure testing, protecting ignition components, leak testing, grounding, and location considerations.

Operation and Commissioning

Sequence of Operation Overview

Details the sequence of operation, including safety loop components and events like pre-purge and pilot flame.

Pre-Commissioning Procedures

Covers pre-commissioning tasks for water, gas, vent, condensate connections, and power supply.

Commissioning Procedures and Test Points

Outlines the commissioning process, including purging, power connection, and critical test points for gas and air pressures.

General Operation Safety Instructions

Provides safety instructions for overheating, gas supply failure, and units submerged in water.

Maintenance and Troubleshooting

Annual Service Recommendations

Provides annual service hints including ensuring clear ducts, clean environment, proper wiring, and checking key components.

Troubleshooting Common Issues

Lists common faults like blower failure, no start, pilot/main flame issues, and provides causes and corrective actions.

Gasmaster GMI 2M User Manual

Table of Contents

Questions and Answers:

Gasmaster GMI 2M Specifications