Operating instructions
1. Check to be sure you have selected the right size boiler with the proper capacity. The I=B=R rating of the boiler selected should be greater
than or equal to the calculated peak heating load (heat loss) for the building or area(s) served by the boiler and associated hot water heating
systems. (See Fig. 2.) Any heat loss calculations used should be based on approved methods.
2. Boiler must be supplied with the proper oil supply and oil piping, sufficient fresh combustion air, and a suitable electrical supply.
3. Boiler must be connected to a suitable venting system and a piping system adequate to distribute the heating load.
4. A thermostat must be properly located and installed for control of the heating system.
If there are any doubts as to the various requirements, check with local authorities and obtain professional help where needed. The Operation
Instructions, Final Checks and Adjustments and Maintenance sections in this manual are vital to the proper and safe operation of the heating
system. Take the time to be sure they are all done.
PROCEDURE 2—LOCATING THE BOILER
If boiler is part of a planned heating system, locate it as close as possible to where it is shown on plan. If boiler is to be part of an existing system,
it is usually best to put it where the old one was. If location is to be changed, additional materials as well as an adequate base will be required.
The following rules apply:
1. The boiler must be level.
2. Use a raised base if floor can become wet or damp.
3. These boilers must have a non-combustible base if installed on a combustible floor. Two inch concrete patio blocks or a 2-in. Cladlite™
pad may be used.
Table 1a—Boiler Ratings and Capacities
NO. SEC
INPUT
*MBH
**HEATING
CAPACITY
*MBH
NET
I=B=R
RATING
*MBH
FIRING
RATE
+GPH
++A.F.U.E.
MIN.
CHIMNEY
SIZE/HEIGHT
DIMENSIONS-IN.
SHIPPING
WEIGHT
TANKLESS
HEATER
G.P.M.##
Without
Tankless Coil
ABC
BW4BAH140
3 91 80 70 0.65 #86.3 8” X8” X15’ 14 1/2 6 8 460 N/A
3 105 92 80 0.75 #85.2 8” X8” X15’ 14 1/2 6 8 460 N/A
3 140 119 103 1.00 83.4 8” X8” X15’ 14 1/2 6 8 460 N/A
BW4BAH210
4 126 111 97 0.90 #86.0 8” X8” X15’ 17 3/4 6 9 5/8 533 N/A
4 175 150 130 1.25 83.9 8” X8” X15’ 17 3/4 6 9 5/8 533 N/A
4 210 178 155 1.50 82.4 8” X8” X15’ 17 3/4 6 9 5/8 533 N/A
BW4BAH280
5 168 147 128 1.20 #86.5 8” X8” X15’ 21 6 11 1/2 620 N/A
5 245 209 182 1.75 83.6 8” X8” X15’ 21 6 11 1/2 620 N/A
5 280 236 205 2.00 82.0 8” X8” X20’ 21 6 11 1/2 620 N/A
Shaded areas are as shipped. Alternate inputs require a field-installed alternate oil nozzle supplied with base model, or Accessory Low Fire Kit required for 91,000 and
126,000 MBH inputs.
* MBH = 1,000 BTU per hour/BTU=British Thermal Unit
** Heating Capacity is based on a 13 percent CO
2
with a -0.02 in. wc draft over fire and a #1 smoke or less. Testing was done in accordance with the D.O.E. (Department
of Energy) test procedure.
+ GPH = Gallons per hour of oil at 140,000 BTU per gallon
++ A.F.U.E. = Annual Fuel Utilization Efficiency based upon D.O.E. test procedure
# As an Energy Star Partner, the manufacturer has determined that this product meets Energy Star guidelines for Energy Efficiency
# # Gallons of water per minute, heated from 40°F to 140°F, with 200°F boiler water temperature, intermittent draw.
Table 1b—Boiler Ratings and Capacities
NO. SEC
INPUT
*MBH
**HEATING
CAPACITY
*MBH
NET
I=B=R
RATING
*MBH
FIRING
RATE
+GPH
++A.F.U.E.
MIN.
CHIMNEY
SIZE/HEIGHT
DIMENSIONS-IN.
SHIPPING
WEIGHT
TANKLESS
HEATER
G.P.M.##
With
Tankless Coil
ABC
BW5BAH140
3 91 80 70 0.65 #86.3 8” X8” X15’ 14 1/2 6 8 470 2.90
3 105 92 80 0.75 #85.2 8” X8” X15’ 14 1/2 6 8 470 3.00
3 140 119 103 1.00 83.4 8” X8” X15’ 14 1/2 6 8 470 3.25
BW5BAH210
4 126 111 97 0.90 #86.0 8” X8” X15’ 17 3/4 6 9 5/8 545 3.15
4 175 150 130 1.25 83.9 8” X8” X15’ 17 3/4 6 9 5/8 545 3.50
4 210 178 155 1.50 82.4 8” X8” X15’ 17 3/4 6 9 5/8 545 3.75
BW5BAH280
5 168 147 128 1.20 #86.5 8” X8” X15’ 21 6 11 1/2 630 3.45
5 245 209 182 1.75 83.6 8” X8” X15’ 21 6 11 1/2 630 4.00
5 280 236 205 2.00 82.0 8” X8” X20’ 21 6 11 1/2 630 4.25
Shaded areas are as shipped. Alternate inputs require a field-installed alternate oil nozzle supplied with base model, or Accessory Low Fire Kit required for 91,000 and
126,000 MBH inputs.
* MBH = 1,000 BTU per hour/BTU=British Thermal Unit
** Heating Capacity is based on a 13 percent CO
2
with a -0.02 in. wc draft over fire and a #1 smoke or less. Testing was done in accordance with the D.O.E. (Department
of Energy) test procedure.
+ GPH = Gallons per hour of oil at 140,000 BTU per gallon
++ A.F.U.E. = Annual Fuel Utilization Efficiency based upon D.O.E. test procedure
# As an Energy Star Partner, the manufacturer has determined that this product meets Energy Star guidelines for Energy Efficiency
# # Gallons of water per minute, heated from 40°F to 140°F, with 200°F boiler water temperature, intermittent draw.
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