UTEC Ignition Control Module: A Basic Overview

What is an ignition control module?

An ignition control module (ICM) is an electronic device that controls the ignition system of a gas-fired furnace, boiler, or other heating appliance. It provides ignition sequencing, flame monitoring, and safety shutoff for intermittent pilot ignition systems.

An intermittent pilot ignition system uses a spark generator to ignite a small pilot flame only when there is a call for heat. The pilot flame then ignites the main burner gas. This reduces the amount of gas wasted and improves the efficiency of the appliance.

What are the features of UTEC ignition control module?

UTEC is a global leader in custom electronic controls, sensors, user interfaces, and digital services within the HVAC and many adjacent industries. UTEC offers a range of ignition control modules that are compatible with various types of gas valves, burners, and sensors. Some of the features of UTEC ignition control modules are:

  • Configurable pre-purge and post-purge times to optimize the combustion process and reduce emissions.
  • Continuous retry or lockout modes to ensure safe and reliable operation.
  • Single rod or dual rod flame sensing options to suit different applications.
  • Internal or external spark generators to provide high voltage sparks for ignition.
  • LED indicators and diagnostic codes to facilitate troubleshooting and maintenance.

How does UTEC ignition control module work?

The following table shows a simplified example of how a UTEC ignition control module works in an intermittent pilot ignition system with a single rod flame sensor and an internal spark generator:

Step Description
1 The thermostat calls for heat and sends a signal to the ICM.
2 The ICM performs a pre-purge cycle to clear any residual gas or air from the burner.
3 The ICM opens the pilot gas valve and activates the spark generator.
4 The spark ignites the pilot gas and creates a pilot flame.
5 The ICM senses the pilot flame through the flame rod and stops the spark.
6 The ICM opens the main gas valve and allows the main burner gas to flow.
7 The pilot flame ignites the main burner gas and creates a main flame.
8 The ICM monitors the main flame through the flame rod and keeps the gas valves open.
9 The thermostat satisfies the setpoint and stops the call for heat.
10 The ICM closes the main gas valve and the pilot gas valve.
11 The ICM performs a post-purge cycle to vent any remaining gas or air from the burner.

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