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DIMENSIONS
BW3 MODELS
29″
23″
25
1
⁄
4
″
23
1
⁄
4
″
5
5
⁄
8
″ 5
5
⁄
8
″
1
3
⁄
4
″
7″
A
GAS
VALVE
INT. PILOT
CONTROL
PRESSURE
SWITCH
BLOWER
VENT
CONNECTOR
COMBINATION
LIMIT & RELAY
CONTROL
1
1
⁄
4
″ SUPPLY
RELIEF
VALVE
BURNER
TEMP
PRESSURE
GAGE
1
1
⁄
4
″ RETURN
CIRCULATOR
LEFT SIDE RIGHT SIDEFRONT
DIMENSIONS (In
.)
*
With factory-supplied adapter installed.
UNIT SIZE A VENT CONNECTION
042 11 4
*
075 14-1/4 4
*
112 17-1/2 4
*
150 20-3/4 4
*
187 24 4
*
225 27-1/4 4
*
CLEARANCES (In.
)
*
Service clearance requirement 24 in.
RIGHT SIDE 6
*
LEFT SIDE 6
TOP 6
BACK 6
FRONT 6
*
RATINGS AND CAPACITIES
*
*
Gas input ratings are for elevations up to 2000 ft. For elevations above 2000 ft, reduce input 4% for each 1000 ft above sea level.
† Selection factors providing for piping loss and starting load are those recommended by the Institute of Boiler and Radiator Manufacturers. Net water boiler
ratings are based on an allowance of 1.15.
‡ In accordance with U.S. Government test procedures.
UNIT
GAS
TYPE
MAX INPUT
(BTUH)
RATINGS
HEATING
CAPACITY‡
AFUE %
NET RATING
BOILER
WATER
CAPACITY
(GALLONS)
APPROX
SHIP.
WT (Lb)Btuh Btuh†
BW3AAN042 Natural 42,500 36,000 84.4 31,000 1.75 211
BW3AAN075 Natural 75,000 63,000 83.4 55,000 3.00 263
BW3AAN112 Natural 112,500 94,000 83.0 82,000 4.25 320
BW3AAN150 Natural 150,000 125,000 82.7 109,000 5.50 369
BW3AAN187 Natural 187,500 155,000 82.3 135,000 6.75 418