Need wiring diagram for L8148J1009 Aquarelay to add Field vent damper

The Steam Whisperer

Just trying to make a few upgrades before winter and tried this last night and didn't get the wiring right.

Abracadabra

https://customer.honeywell.com/resources/Techlit/TechLitDocuments/60-0000s/60-2278.pdf

The Steam Whisperer

thanks for the link to the diagrams....I had to put together 3 diagrams to get the wiring sorted out, but I have it working now.

Tim McElwain

You can't use an L8148J Universal replacement relay with a vent damper. The reason is the primary control (L8148J) does not have an internal fuse which must blow on the first call for heat. All controls that contain a place for a damper have such a fuse. The blowing of the fuse prevents operation of the equipment if the damper is not attached to the equipment.