THOSE are Suburban SFV models
*SFV20, 25, 30, 35 or 42
Same components except for LP Orifice
Pg 12 installation diagram
Pg 30 Troubleshooting Block diagram for units with Time Delay Relay (90's)
Pg 35 for Local Sensing Wiring diagram (SF)
*SFV is Suburban Furnace VERTICAL install
http://techsupport.pdxrvwholesale.co...ing-Manual.pdf
Pull Exhaust/Intake
Remove screws on cover panel
Remove panel to access components