Sequence
- IGN J1-6 sends 24Vac on wire 105K(BR), and checks vestibule temp limit (VLT) for closure.
- Sends 24Vac to the gas valve on wire 105D(BR) and premix blower control relay (NOX1) on wire 105L(YL) to terminal A.
- Premix blower control relay (NOX1) terminals 3 wire 689A(GR-YL) and 9 wire 688A(YL) normally close, will open.
- The gas valve and the premix blower come on at the same time.
- Note: The IGN does not know if VTL is open or closed. It only knows if the unit did not light even though it attempted to power the gas valve and premix blower to light the unit.
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.