—11—
SPECIFICATIONS
UNIT SIZE
042
075
112
150
187
225
Sections—Fine Grain Cast-Iron
No.
2
3
4
5
6
7
GAS CONTROLS — INTERMITTENT PILOT
Gas Valve
Honeywell
Inlet Size
In.
1/2 FPT
Pilot Assembly
Honeywell
Spark Generator
Honeywell
Burners—Stainless/Titanium Alloy
No.
1
2
3
4
5
6
Burner Orifice—Drill Size Natural
32
34
34
34
34
34
CONTROLS
Limit Control Range
°
F
180–240
Pressure/Temperature Gage
Psig
0–60
°
F
60–260
Pressure Relief Valve Setting
Psig
30
Circulator Relay—Aquastat
Honeywell (Factory Installed)
CIRCULATOR
Taco
Model
007
Full Load Amps
0.70
Flange Size FPT
In.
1-1/4
Model BW3 Gas-Fired Induced-Combustion Water Boilers
are the answer to energy-efficient residential hydronic
heating. They provide fast, almost instant, heat quietly and
economically.
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 kit is used.
The design of model BW3N is CSA and A.G.A. certified for
use with natural gas and is convertible to propane gas with
accessory kit.
FEATURES
RANGE OF CAPACITIES
—Six sizes ranging from 42,500 through
225,000 Btuh input.
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 power connections as shipped.
VENTING
—This boiler can be vented into any approved chimney or
Type B-1 vent. Common-venting with an existing water heater is
acceptable in vertical vent systems. See the Installation Instructions
for common venting requirements. The induced-combustion design
also eliminates the need for a vent damper.
THERMAL-PIN CAST-IRON SECTIONS
—These sections speed
heat transfer from the flue gases to the boiler water, with faster ther-
mostat response, providing greater comfort and economy.
TITANIUM COMPOSITE BURNERS
—Provide quiet operation,
corrosion resistance, and improved combustion efficiency. Propane
convertible with accessory kit.
CONTROLS
—An automatic gas valve and intermittent pilot provide
quiet, dependable operation of the burners. Factory-installed safety
components provide maximum safety against overheating, pressure
buildup, and low-water operation.
INSULATED CASING
—Fully insulated with fiberglass for maximum
operating efficiency and economy.
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.
UNIT CONVERTIBLE
—The Boiler is listed for power venting with field
controls power venting kit.
WARRANTY
—The cast-iron sections are covered by a non-prorated
20-year warranty on the entire assembly. Circulator pump covered by
3-year warranty. All other parts are covered by a 1-year limited
warranty.
MODEL BW3
Summary of Contents for BS1
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