A flame sensing rod is used on staged gas heat with the following equipment for flame proving/detection:
- Precedent with Electromechanical controls
- Precedent with ReliaTel controls
- Precedent with Symbio 700 controls
- Foundation with Electromechanical controls
- Foundation with Symbio 700 controls
Testing the flame signal requires a multimeter capable of measuring microamps ( µA )
See your multimeter instructions for testing microamps ( µA )
At the flame sensor, disconnect the wire from the flame sensor and connect to the red lead of the meter.
Connect the black lead of the meter to the wire
Initiate the heating sequence and monitor the dc microamps.
Nominal flame signal will be 4.5 µA within the 30s after the flame has been established. Flame across the sensor should register at a minimum of 1.2 µA to be considered a valid flame signal.
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.