Lennox COWB2 User Manual

2
The Empire Water boiler is a natural draft oil red
hot water boiler comprised of cast iron sections.
The Empire Water boiler is available with 3, 4,
or 5 cast iron sections. These sections are held
together by cast iron push nipples.
The Empire Water boiler is capable of ring #2
fuel oil from 0.65 gph up to 2.00 gph. All packaged
iNTrOdUCTiON
boilers include a swing door, Honeywell aquastat,
temperature and pressure gage, relief valve, drain
valve, 2 Delevan oil nozzles for multiple ring rates
(only when purchasing a burner), ue brush, and
an extra boiler tap for an expansion tank or air
elimination.
20.5000
36.0000
TEMP./PRESSURE
GAUGE
LIMIT CONTROL
(Without Tankless Coil)
LIMIT CONTROL
(With Tankless Coil)
1 1/4" RETURN
NIPPLE & REDUCING TEE
17 1/2"
RIELLO
13 3/4"
BECKETT
OR CARLIN
A
C
WATER
OUTLET
OIL BURNER
DRAIN VALVE
(Furnished)
OPTIONAL
TANKLESS COIL
WATER HEATER
WITH 1/2" NPT
CONNECTIONS
RELIEF VALVE
OUTLET
B
FRONT VIEW
RIGHT SIDE VIEW
WITH SWING DOOR
BACK VIEW
BOiler raTiNgs aNd CapaCiTies
BOILER MODEL NO.
Without Tankless Coil
NO.
SEC.
INPUT
*MBH
**HEATING
CAPACITY
*MBH
NET
I=B=R
RATING
*MBH
FIRING
RATE
+GPH
A.F.U.E.
++
MINIMUM
CHIMNEY
SIZE/HEIGHT
DIMENSIONS (inches)
A B C
COWB23.65Z 3 91 80 70 0.65 86.3 8” X 8” X 15” 141/2 6 8
COWB23.75Z 3 105 92 80 0.75 85.2 8” X 8” X 15” 141/2 6 8
COWB231.00Z 3 140 119 103 1.00 83.4 8” X 8” X 15” 141/2 6 8
COWB24.90Z 4 126 111 97 0.90 86.0 8” X 8” X 15” 173/4 6 95/8
COWB241.25Z 4 175 150 130 1.25 83.9 8” X 8” X 15” 173/4 6 95/8
COWB241.50Z 4 210 178 155 1.50 82.4 8” X 8” X 15” 173/4 6 95/8
COWB251.20Z 5 168 147 128 1.20 86.5 8” X 8” X 15” 21 6 111/2
COWB251.75Z 5 245 209 182 1.75 83.6 8” X 8” X 15” 21 6 111/2
COWB252.00Z 5 280 236 205 2.00 82.0 8” X 8” X 20” 21 6 111/2
*MBH = 1,000 BTU per hour BTU = British Thermal Unit
**Heating Capacity based on 13% CO2 with a 0.02” w.c. draft over re, and a #1 smoke or less. Testing was done in accordance with the
D.O.E. (Department of Energy) test procedure.
+GPH = Gallons per hour oil at 140,000 BTU per gallon
++A.F.U.E. = Annual Fuel Utilization Efciency based upon D.O.E. test procedure.

Lennox COWB2 Specifications

General

Brand	Lennox
Model	COWB2
Category	Boiler
Language	English