—12—
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 SIDE
FRONT
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
Summary of Contents for BS1
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