Control box assy diagram
Part #HN51JD024
The manufacturer no longer makes this part, and there's no substitute part
Burner assy diagram
Part #48GS400192
Control box assy diagram
Part #HT01BD209
Accessory economizer diagram
Part #9901-0183
Blower assy diagram
Part #48GS500109
Front view/louver option/rear view diagram
Part #48GS400482
Accessory manual outside air diagram
Part #0900002A
Front view/rear view diagram
Part #313974-751
Outside view diagram
Part #48GS500461
Front view/rear view diagram
Part #HN52AA001