DIMENSIONS
MODEL BW9
ALTERNATE SUPPLY
&RETURN OPENINGS
CONNECTIONS
PROVIDED INSIDE
BOILER CABINET)
ACCESS PANEL 
GAS SUPPLY
OPENING
(1/2" NPT) (12.7mm)
COMBUSTION AIR
INTAKE FITTING
(2" PVC) (50.8mm)
ALTERNATE OPENING
FOR GAS SUPPLY
BOILER WATER TEMPERATURE & PRESSURE GAUGE
FRONT PANEL DOOR PULL 
LEVELING FEET
JUNCTION BOX FOR 120 V POWER, 120 V CIRCULATOR BEADS, AND 24 V THERMOSTAT LEADS
VENT CONNECTION
(2" CPVC) (50.8mm)
ALTERNATE GAS
SUPPLY OPENING
ALTERNATE OPENING FOR
VENT TEE
A99156
STANDARD BOILER WATER
SUPPLY & RETURN OPENINGS
5" (127mm)
VENT CONNECTION
(2" CPVC) (50.8mm)
DRAIN
CONDENSATE
DRAIN FITTING
(1/2" PVC) (12.7mm)
OPENING FOR RELIEF VALVE
DISCHARGE PIPE
OPENING FOR AIR
VENT AND EXPANSION
TANK CONNECTION
ALTERNATE BOILER WATER SUPPLY AND
RETURN | (31.75mm) CONNECTIONS |
BOILER CABINET) |
PROVIDED INSIDE
CLEARANCES
UNIT | COMBUSTIBLE (in.) | ACCESSIBILITY/CLEANING (in.) | SERVICING (in.) |
|
|
|
|
TOP | 1 | 8 | 8 |
|
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|
|
LEFT SIDE | 1 | 24 | 24 |
RIGHT SIDE | 8 | — | — |
|
|
|
|
BASE | 1 | — | — |
FRONT | 0 | 24 | 24 |
BACK | 1 | — | — |
|
|
|
|
INTAKE/VENT PIPING | 0 | — | — |
NEAR BOILER HOT WATER PIPING | 1 | — | — |
*Service clearance requirement
RATINGS AND CAPACITIES*
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|
| BOILER |
|
|
|
|
|
|
| WATER | APPROX |
| GAS | MAX INPUT | HEATING |
| NET RATING | CAPACITY | SHIP. |
UNIT | TYPE | (BTUH) | CAPACITY (BTUH) | AFUE % | Btuh† | (GALLONS) | WT (Lb) |
BW9AAN050 | Natural | 50,000 | 45,000 | 90 | 39,000 | 2.6 | 220 |
BW9AAN075 | Natural | 75,000 | 68,000 | 90 | 59,000 | 2.6 | 220 |
|
|
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|
|
|
BW9AAN100 | Natural | 100,000 | 90,000 | 90 | 78,000 | 2.6 | 220 |
*Gas input ratings are for elevations up to 2000 ft. In the USA, for elevations above 2000 ft., reduce input per the charts supplied in the high altitude derate kits. In Canada, boilers may be used at high altitude by using a certified field conversion kit.