Answer
Dec 16, 2019 - 08:04 AM
The brown wire on the control box would connect to the negative signal wire of the furnace. The positive signal wire of the furnace would need to be capped off and not used. I've attached a drawing showing the ACRG15 (ACTH12 thermostat and control box) for your reference.
https://www.rvupgradestore.com/v/vspf...
https://www.rvupgradestore.com/v/vspf...
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