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| A | 1 1⁄4″ SUPPLY | 4 | |
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| COMBINATION | 23 1⁄″ | |
RELIEF |
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| VENT | ||
TEMP |
| LIMIT & RELAY | |||
VALVE | PRESSURE |
| CONTROL | CONNECTOR | |
| GAGE |
| 1 1⁄4″ RETURN |
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| BLOWER | |
| 29″ |
| 25 1⁄4″ |
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| 23″ | PRESSURE | |
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| 5 5⁄8″ |
| 5 5⁄8″ | SWITCH | |
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BURNER | 1 | 3⁄″ |
| CIRCULATOR | |
GAS | INT. PILOT | ||||
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| 4 | |||
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| 7″ | VALVE | CONTROL | |
LEFT SIDE |
| FRONT | RIGHT SIDE |
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| A85084 | |
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| NATURAL AND PROPANE GAS² | DIMENSIONS (IN.) | ||||
BOILER MODEL NUMBER* | NO. OF | A.G.A. | Heating | Net | Width | Vent Diameter | |
I=B=R | |||||||
SECTIONS | Input | Capacity |
| To Chimney | |||
| Rating | A | |||||
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| MBH | MBH | ||||
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| MBH | (Category I) | ||||
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BW3AAN000042ABAA | 2 | 42.5 | 36 | 31 | 11 | 4 | |
BW3AAN000075ABAA | 3 | 75.0 | 63 | 55 | 4 | ||
BW3AAN000112ABAA | 4 | 112.5 | 94 | 82 | 4 | ||
BW3AAN000150ABAA | 5 | 150.0 | 125 | 109 | 4 | ||
BW3AAN000187ABAA | 6 | 187.5 | 155 | 135 | 24 | 4 | |
BW3AAN000225ABAA | 7 | 225.0 | 186 | 162 | 4 | ||
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*Sixth position of Model No. indicates natural or propane gas usage: N = Natural Gas P = Propane Gas
²Boilers are equipped for altitudes up to 2000 ft only.
U.S.A OnlyÐFor altitudes above 2000 ft, ratings should be reduced at the rate of 4 percent for each 1000 ft above sea level.
Canada OnlyÐBoilers may be used at high altitude by using a certified field conversion kit, resulting in 10 percent derate.
Heating Capacity is based on Department of Energy (DOE) test procedure.
MBHÐ1000 Btuh (British Thermal Unit Per Hr)
Fig. 1ÐDimensional Drawing and Boiler Ratings and Capacities
Canada OnlyÐFor altitudes in the range of
→LOCATING THE BOILER
NOTE: This unit MUST be set on a concrete or other
1.Select level location as centralized with piping system and as near chimney as possible.
2.Place crated boiler at selected location. Remove crate by pulling crate sides from top and bottom boards. When boiler is to be installed on a combustible floor, a combustible floor base must be used.
This boiler must NOT be installed on carpeting.
3.Boiler is to be level. Metal shims may be used under base legs for final leveling.
4.The floor supporting boiler must be
5.Additional clearances for service may exceed clearances for fire protection. Always comply with the minimum fire protection clearances shown on the unit. An
6.Determine boiler room size. Rooms that are large in comparison with the size of boiler are defined as rooms having a volume equal to or greater than 16 times the volume of the boiler. Where room ceiling height is greater than 8 ft, volume of room shall be figured on the basis of 8 ft ceiling height. Determination of room size should be based on total volume of all gas fired equipment installed in that room. (See Table 1.) Refer to Section 6.3 of NFGC, Central Heating Boilers and Furnaces for further information, including approved methods for reducing clearances in large rooms.
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