e-TRIM Overview

e-TRIM is designed to be installed on indirect fired burners. With e-TRIM, the operator will be able to monitor and alarm based on a desired oxygen percentage during high fire. The system will provide continuous indication of oxygen and will warn the operator when the burner is outside of the desired oxygen band.

Additionally, e-TRIM is equipped with a critical alarm. This alarm is designed to provide an audible and visual indication when a burner is either not lit or running extremely lean.

Typical settings are as follows:

Desired percent on high fire is 2% per the DOE, which would provide 10% excess air. The band alarm should be set to 1%. When on high-fire, if the reading is below 1% or above 3%, the screen will show an out-of-band condition. Additionally, SSi recommends the critical alarm be set to 8%. When on high fire, if the reading goes above 8% and the trim delay expires, the horn will sound. This is notification that a burner that is not lit or is extremely lean.

WARNING:

It is recommended that the desired oxygen percentage be verified with the burner manufacturer prior to adjusting. It is important to make sure that the Carbon Monoxide PPM limit is not increased when adjusting the burner.

e-TRIM electronics enclosure must not be exposed to temperatures above 120°F (49°C). It should not be mounted on the furnace unless proper cooling is installed. Contact SSi at 513-772-0060 for questions about mounting and cooling.

Sensor installation:

The sensor should be mounted on the exhaust leg of the burner prior to any gaps or possible air drafts. The sensor should be installed in a location that will not exceed 1000° F on high fire.

Sensor Mounting:

The thread for the e-TRIM O₂ sensor is M18 x 1.5. It is a metric thread.

Please refer to the electrical print provided with the panel for all wire terminations.

IMPORTANT: When first warming up, the 0₂ percentage for each burner will read 99.99%. This is expected, and the value will change to an appropriate value within 30 to 60 seconds. If the 0₂ percentage should read 99.99% at any time other than during the warm-up period or if it remains 99.99% after the first two minutes of operation, there may be a problem with the sensor. Call Super Systems Inc. technical support at 513-772-0060 for assistance.

Examples of e-TRIM installations are shown in Appendix D – Typical Installations Based on Application.