—10—
DIMENSIONS
BW1 and BW2 MODELS
23
1
⁄
4
″
31
3
⁄
8
″
5
3
⁄
8
″
4
3
⁄
4
″
1
1
⁄
4
″
SUPPLY
26
1
⁄
2
″
12
1
⁄
4
″
A
8
″
TEMPERATURE/
PRESSURE GAGE
SPILL
SWITCH
DRAIN VALVE
INT. PILOT
CONTROL
ROLLOUT
SWITCH
GAS
VALVE
1
1
⁄
4
″
RETURN
1
1
⁄
4
″
NPT
AQUASTAT
VENT
DAMPER
ASME
RELIEF
VALVE
LEFT SIDE
RIGHT SIDE
FRONT
DIMENSIONS (In
.)
UNIT SIZE
A
VENT CONNECTION
037
8
3
070
11-1/4
5
105
14-1/2
6
140
17-3/4
6
175
21
7
210
24-1/4
7
245
27-1/2
7
280
30-3/4
7
CLEARANCES (In.
)
*
Service clearance requirement 24 in.
RIGHT SIDE
6 (2-5 Section)
*
24 (6-9 Section)
*
LEFT SIDE
6 (2-5 Section)
24 (6-9 Section)
TOP
6
BACK
6
FRONT
6
*
RATINGS AND CAPACITIES
*
*
Ratings are for altitudes to 2000 ft. Unit ratings for altitudes over 2000 ft are 4% less for each 1000 ft above sea level.
BW1, BW2
GAS
TYPE
NUMBER
OF
SECTIONS
MAX
INPUT
(BTUH)
HEATING
CAPACITY
(BTUH)
NET
RATING
(BTUH)
AFUE %
APPROX
SHIP.
WT (Lb)
BW1
BW2
AAN037
Natural
2
37,500
30,000
26,000
80.0
81.4
227
AAN070
Natural
3
70,000
57,000
50,000
80.4
81.6
285
AAN105
Natural
4
105,000
85,000
74,000
80.4
81.5
350
AAN140
Natural
5
140,000
113,000
98,000
80.3
81.3
421
AAN175
Natural
6
175,000
142,000
124,000
80.2
81.1
488
AAN210
Natural
7
210,000
170,000
148,000
80.1
81.0
564
AAN245
Natural
8
245,000
198,000
172,000
80.0
81.6
626
AAN280
Natural
9
280,000
226,000
197,000
80.0
80.7
689
Summary of Contents for BS1
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