750-204
Profire D/LND
8-1
CHAPTER 8 Flue Gas Recirculation
8.1 — LN Model Designations, Sizes, and Inputs
Model designations are based on the type of fuel(s) to be fired and the amount of furnace pressure to overcome.
Burner size is based on firing rate (maximum input in Btu/hr.).
Two designs of low NOx burners are available. One is for less than 30 ppm NOx @ 3% O
2
and the other for less
than 20 ppm @ 3% O
2
, when firing natural gas.
For example, if the model number on the nameplate is LNDLG-252P-30, it indicates a No. 2 oil and gas burner
with input rated at 21,000 MBtu per hour, and NOx performance of less than 30 ppm.
LNDLG-252P-20 indicates a gas and oil burner with input rated at 16,800 MBtu per hour, and NOx perfor-
mance of less than 20 ppm.
The installation of a burner shall be in accordance with the regulations of authorities having jurisdiction. The
equipment must be installed in accordance with applicable local, state, or provincial installation requirements
including the National Electrical Code (NEC) and Associate Insurance Underwriters.
Oil and gas burning equipment shall be connected to flues having sufficient draft at all times, to assure safe and
proper operation of the burner.
Models Standard Fuel-Air Atomization
LNDG Gas
LNDLG #2 Oil and Gas
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