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Models BW1 and BW2 Gas-Fired Hot Water Boilers provide
fast heat quietly and economically to assure the finest in
hydronic heating.
These boilers provide quality design in a small, compact unit
easily installed in a basement, garage, or utility room. They
can be installed on a combustible floor when an optional
combustible floor base is used.
The models BW1 and BW2 design is CSA and A.G.A.
certified for use with natural and is convertible to propane gas
with accessory kit.
FEATURES
RANGE OF CAPACITIES
—Sizes 37,500 through 280,000 Btuh are
available.
COMPLETELY PACKAGED
—Each boiler is completely assembled,
including all controls (except room thermostat). All necessary wiring is
factory installed. The boiler is ready for gas, water, room thermostat,
and electrical connections as shipped.
THERMAL-PIN, CAST-IRON SECTIONS
—These sections speed
heat transfer from the flue gases to the boiler water with faster
thermostat response, providing greater comfort and economy.
Maximum heat is produced at a lower level on the thermal-pin sections,
leading to peak efficiency.
INTEGRAL DRAFT
—These boilers incorporate an integral draft sys-
tem to simplify installation. No external draft diverter is needed.
TITANIUM COMPOSITE BURNERS
—Provide quiet operation,
corrosion resistance and improved combustion efficiency. Propane
convertible – with accessory kit.
CONTROLS
—An automatic gas valve and continuous pilot or inter-
mittent pilot provide quiet, dependable operation of the burners.
Factory-installed safety components assure protection against
overheating, pressure buildup, and low-water operation.
INSULATED CASING
—The casing is fully insulated with fiberglass for
maximum operating efficiency and economy.
AUTOMATIC VENT DAMPER
—
The Model BS1 and BS2 is
designed with automatic vent damper to recover chimney loss
during off cycle
.
SECTIONS TESTED
—
Each section is hydrostatically tested to
50 psig. Individual sections are tested to 125 psig at factory.
Assembled sections are tested to 75 psig at the factory. The
maximum allowable pressure is 50 psig for hot water boilers.
WARRANTY
—The cast-iron sections are covered by a non-prorated
20-year warranty on the entire assembly. Vent damper covered by 5-
year warranty. Circulator pump covered by 3-year warranty. All other
parts are covered by a 1-year limited warranty.
MODELS BW1 and BW2
SPECIFICATIONS
*
Factory authorized and listed, field installed.
† A 4-in. vent damper is supplied. A 4-in. to 3-in. reducer is also furnished.
UNIT SIZE
037 070 105 140 175 210 245 280
GENERAL DATA
Sections—Fine Grain Cast Iron No. 23456789
Burners—Stainless/Titanium Alloy No. 12345678
Burners—Orifice Drill Size Natural 34 34 34 34 34 34 34 34
GAS CONTROLS — STANDING PILOT (BW1)
Gas Valve Honeywell
Inlet Size
In.
1/2 FPT 3/4 FPT
Pilot Assembly Honeywell
GAS CONTROLS — INTERMITTENT PILOT (BW2)
Gas Valve Honeywell
Inlet Size
In.
1/2 FPT 3/4 FPT
Pilot Assembly Honeywell
Spark Generator Honeywell/UTEC
CONTROLS
Limit Control Range
°
F 140–240
Pressure/Temperature Gage Psig 10–70
°
F60–320
Pressure Relief Valve Setting Psig 30
Circulator Relay—Aquastat Honeywell (Factory Installed)
Vent Damper
*
In. 4† 56 7
CIRCULATOR
Taco Model 007
Full Load Amps 0.70
Flange Size FPT In. 1-1/4