A.O. Smith HWB-420 User Manual
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PLACE THESE INSTRUCTIONS ADJACENT TO BOILER AND
NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE
A DIVISION OF A.O. SMITH CORPORATION
MC BEE, SC SEATTLE, WA
STRATFORD, ONTARIO
VELDHOVEN, THE NETHERLANDS
w w w.hotwater.com
PART NO. 211683-000 REV.02
PRINTED IN U.S.A. 0905
SUPERSEDES PART NO'S, 210288-000 REV. 01 & 192356-000
GAS-FIRED COMMERCIAL COPPER BOILERS FOR
HYDRONIC HEATING AND HOT WATER SUPPLY
•
INSTALLATION
•
OPERATION
•
MAINTENANCE
•
LIMITED WARRANTY
•
INDOOR ONLY
MODELS HW/HWB 300, 399, 420, 520, 610, 670
UP-FLOW MODELS
CAUTION
TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION
RELATIVE TO YOUR SAFETY. PLEASE READ THOROUGHLY
BEFORE USING APPLIANCE.
RELATIVE TO YOUR SAFETY. PLEASE READ THOROUGHLY
BEFORE USING APPLIANCE.
WARNING: If the information in this manual
is not followed exactly, a fire or explosion
may result causing property damage,
personal injury or death.
is not followed exactly, a fire or explosion
may result causing property damage,
personal injury or death.
—
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
vicinity of this or any other appliance.
—
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch;
• Do not touch any electrical switch;
do not use any phone in your
building.
building.
• Immediately call your gas supplier
from a neighbor's phone. Follow the
gas supplier's instructions.
gas supplier's instructions.
• If you cannot reach your gas supplier,
call the fire department.
— Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
service agency or the gas supplier.