Solution:
Here is how the line voltage gets to the transformers from the Hi Voltage Terminal Block.
L1 – Red
- From (HTB1) HI Voltage Terminal Block
- To (FU1) Fuse (if present)
- From (FU1) Fuse (if present)
- To CF1 (Outdoor Motor Capacitor)
- From CF1 (Outdoor Motor Capacitor)
- To TNS1 (24 VAC Control Power Transformer) COM Terminal
- From TNS1 (24 VAC Control Power Transformer) COM Terminal
- To TNS2 (Ignition Transformer) H1 Terminal
L2 – Blue
- From (HTB1) HI Voltage Terminal Block
- To (FU2) Fuse (if present)
- From (FU2) Fuse (if present)
- To Compressor Contactor 1, Terminal L3
- From Compressor Contactor 1, Terminal L3
- To TNS2 (Ignition Transformer) H2 or H3 Terminal
- From TNS2 (Ignition Transformer) H2 or H3 Terminal
- To TNS1 (24 VAC Control Power Transformer) 208, 230, 480 or 575 Terminal
Below is a modified sample wiring diagram for a visual.
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.