Back Up Battery Connection

1. Place the 12-volt backup battery in the cabinet.

2. After all connections to the control are completed and AC power has been applied, connect the red and black flying leads on the control board to the battery. 

Note: Do not attach these leads to the battery terminals until all connections are completed

Installation Manual For More Information:

https://turbifycdn.com/ty/cdn/yhst-51756635596032/honeywell-vista-15p-control-panel-installation-setup-guide.pdf