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WESTCAST, INC.
260 NORTH ELM STREET WESTFIELD, MA 01085
TEL. (413) 562-9631 FAX (413) 562-3799
www.smithboiler.com
GB300-IOM-4
GB300
NATURAL OR PROPANE GAS BOILER
INSTALLATION & OPERATING MANUAL
Designed and tested according to A.S.M.E. Boiler and Pressure Vessel Code, Section
IV for a maximum allowable working pressure of 80 psi US, 50 psi Canada water,
15 psi steam.
CAUTION: Do not use automotive anti-freeze in the boiler waterways. If the use of
antifreeze is necessary an anti-freeze specifically formulated for hydronic heating
systems must be used!
Water treatment is not recommended. This boiler uses gaskets made from ethylene
propylene, EPT, to seal the section ports. Consult a water treatment professional before
adding any chemicals to the boiler water to ensure that they are compatible with the
gaskets. Failure to comply with this caution can result in failure of the gaskets voiding
the warranty.
INSTALLER READ THESE INSTRUCTIONS CAREFULLY.
THEY WILL SAVE YOU VALUABLE TIME WHEN ASSEMBLING THE BOILER.
THESE INSTRUCTIONS TO BE AFFIXED ADJACENT TO THE BOILER.
CONSUMER, RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE PURPOSES.
WARNING: If the information in this manual is not followed exactly, a fire or explosion
may result causing property damage, personal injury or loss of life.
Do not store or use gasoline or other flammable vapors and liquids in the 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 use any phone in your building.
• Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call the fire department.
A qualified installer, service agency or the gas supplier, must perform installation
and service.