Lennox COWB2

36
NOTE: All burners use an insertion depth of 2 ¼” and red at a over-re draft of 0.02
inches w.c. The burner settings provided are intended for initial start up only. Final
adjustment must be made using combustion test instruments.
BOILER
MODEL
DELEVAN
OIL NOZZLE
FIRING
RATE
(gph)
HEAD-ADJ.
OR SETTING
LOW
FIRE
BAFFLE
AIR
SHUTTER/
BAND
STATIC
PLATE
OIL
BURNER
COWB2-3-.65* 0.50-80º B 0.65 F0 - 1 ⅛ YES 10/0 3 ⅝ AFG F-HEAD
COWB2-3-.75 0.65-70º B 0.75 F3 - 1 ⅛ YES 10/0 3 ½ AFG F-HEAD
COWB2-3-1.00 0.85-70º B 1.00 F3 - 1 ⅛ NO 10/2 3 ½ AFG F-HEAD
COWB2-4-.90 0.75-80º A 0.90 F3 - 1 ⅛ NO 8/0 3 ½ AFG F-HEAD
COWB2-4-1.25 1.00-80º A 1.25 F6 - 1 ⅛ NO 10/0 3 ⅜ AFG F-HEAD
COWB2-4-1.50 1.25-80º A 1.50 F6 - 1 ⅛ NO 10/2 3 ⅜ AFG F-HEAD
COWB2-5-1.20 1.00-60º B 1.20 0 NO 10/1.5 2 ¾ AFG 50 MD
COWB2-5-1.75 1.50-45º B 1.75 2 NO 10/4 2 ¾ AFG 50 MD
COWB2-5-2.00 1.65-60º B 2.00 4 NO 10/5 2 ¾ AFG 50 MD
*To re the 3EW.65 on rate, the oil pressure must be increased to 175 psig. All Beckett oil burners for the EW boiler are factory preset
at 140 psig.
BeCKeTT Oil BUrNer, NOZZle, aNd air seTTiNg