Lennox O23 User Manual

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SPECIFICATIONS − O23
Model Number O23Q270 O23Q3105/120 O23Q5140/154
InputBtuh (kW) low/high 70,000 (20.5) 105,000 / 120,000(30.8 / 35.2) 140,000 / 154,000(41.0 / 45.1)
Output Btuh (kW) low/high 57,000 (16.7) 85,000 / 97,000 (24.9 / 28.4) 113,000 / 125,000 (33.1 / 36.6)
*A.F.U.E. 83.8% 82.8% (105) / 82.5% (120) 82.5% (140) / 81.4% (154)
Nozzle Rating  gph (L/hr) and spray angle .50 (1.9)  80°hollow
.65 (2.5)  80° (105 input) solid
.75 (2.8)  80°(120 input) solid
.85 (3.2)  80° (140 input) solid
1.00 (3.8)  80° (154 input) solid
Flue Size Diameterin. (mm) 6 (152) 6 (152) 6 (152)
Oil Burner Pump 1 Stage 1 Stage 1 Stage
Oil Burner Pump Pressure  psig (Pa) 100 (690) 140 (965) 140 (965)
Blower wheel nominal
in. 10 x 6 10 x 8 12 x 9
Blower
wheel
nominal
diameter x width
mm 254 x 152 254 x 203 305 x 229
Blower Motor Output  hp (W) 1/3 (249) 1/3 (249) 3/4 (560)
Nominal cooling that can be added
Tons 2 thru 2.5 2 thru 3.5 3 thru 5
Nominal cooling that can be added
kW 7.0 thru 8.8 7.0 thru 12.3 10.6 thru 17.6
**Number and size of filtersin. (mm) (1) 16 x 25 x 1 (1) 16 x 25 x 1 (2) 16 x 25 x 1
Shipping weight  lbs. (kg) 1 package 225 (102) 225 (102) 275 (125)
Electrical characteristics 115 volts  60 hertz  1 phase
 Optional Accessories (Must Be Ordered Extra) 
Two Stage Oil Pump 65A44
Oil Filter 81P89
*Annual Fuel Utilization Efficiency based on U.S. DOE test procedures and FTC labeling regulations. Isolated combustion system rating for nonweatherized furnaces.
**Cleanable frame type filters. Furnished with unit in Side Filter Adaptor Kit for field installation external to the cabinet.
Requires return air from both sides of cabinet.
Nozzle must be field provided for field conversion to higher heating input.
SPECIFICATIONS − OHR23
Model Number OHR23Q3105/120 OHR23Q5140/154
InputBtuh (kW) low/high 105,000 / 120,000(30.8 / 35.2) 140,000 / 154,000(41.0 / 45.1)
OutputBtuh (kW) low/high 85,000 / 97,000 (24.9 / 28.4) 113,000 / 125,000 (33.1 / 36.6)
*A.F.U.E. (low/high) 81.8% / 81.3% 81.5% / 81.7%
Nozzle RatingU.S. gph (L/hr)
and spray angle
.65 (2.5)  80 (105 input) solid
.75 (2.8)  80 (120 input) solid
.85(3.2) 80(140 input) solid
1.00 (3.8)  80 (154 input) solid
Flue Size Diameterin. (mm) 6 (152) 6 (152)
Oil Burner Pump 1 Stage 1 Stage
Oil Burner Pump Pressure  psig (Pa) 140 (965) 140 (965)
Blower wheel nominal diameter x width  in. (mm) 10 x 10 (254 x 254) 12 x 9 (305 x 229)
Blower motor outputhp (W) 1/2 (373) 3/4 (560)
Nominal cooling that can be added
Tons 2 to 3 3 to 5
Nominal cooling that can be added
kW 7.0 to 10.6 10.6 to 17.6
Shipping weightlbs. (kg) 1 package 225 (102) 265 (120)
Electrical characteristics 115 volts  60 hertz  1 phase
 Optional Accessories (Must Be Ordered Extra) 
Two Stage Oil Pump 65A44
Filter Kit
Catalog no. 35K01 35K06
Fil
ter
Ki
t
No & size of filters in (mm)
(2)101/4x201/2x1(260x521x25)
(2)113/4x231/2x1(298x597x25)
No. & size of filtersin. (mm) (2) 101/4 x 201/2 x 1 (260 x 521 x 25) (2) 113/4 x 231/2 x 1 (298 x 597 x 25)
Downflo Additive Base 35K07 35K08
Horizontal Venting Kit 62J01
Burner Cover 84H26
Vestibule Cover Kit (full front cover) 37K28 37K29
Oil Filter 81P89
*Annual Fuel Utilization Efficiency based on U.S. DOE test procedures and FTC labeling regulations. Isolated combustion system rating for nonweatherized furnaces.
Nozzle must be field provided for field conversion to higher heating input.

Lennox O23 Specifications

General

Brand	Lennox
Model	O23
Category	Furnace
Language	English