Old-Biscuit wrote:
wa8yxm wrote:
While I do not know your furnace on mine there are two blowers One for the fire box one for the house and both run on the same motor......
You can adjust teh air damper to compensate on the fire box
Otherwise I do not anticipate any problems.
WHAT 'air damper'?
On the NT series, you have a long adjustment screw accessed from the cover by the burner plate that has the round glass hole to see the burner flame. That moves a plate with a hole in it by the orifice. That is used to adjust the rate of LP to air to get the blue flame. It should NEVER need adjusting as long as the burner is clean and the orifice is open and correct with no debris. Adjusting this plate will NOT compensate for a higher or lower RPM motor. Doug
PS, I assume you have the Cast iron burner, since your unit must be 25 to 35 years old to be a NT 30 K. If you have the SP type burner it does not have the air adjustment
If you open this link, at the end of the burner you will see what looks like a long pencil size rod. THAT is the air adjustment screw drive. It goes along the burner to that rectangular plate in front of the other end of the burner that has the holes
https://pdxrvwholesale.com/products/suburban-furnace-model-nt-30m-tune-up-kit
