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MODEL GT SERIES
INSTALLATION, OPERATING
AND MAINTENANCE MANUAL
Modulating, Direct Vent, Gas-Fired Condensing Boilers
Natural Or Propane
150,000 to 399,000 Btuh Input
GTIOM-3
gama
ENERGY STAR
ENERGY STAR
Do not store or use gasoline or other fl ammable 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 fi re department.
Installation and service must be performed by a qualifi ed installer, service agency or
the gas supplier.
WARNING: If the information in this manual is not followed exactly, a fi re or explosion
may result causing property damage, personal injury or loss of life.
INSTALLER: THESE INSTRUCTIONS MUST BE AFFIXED ADJACENT TO THE BOILER.
CONSUMER: RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE PURPOSES.
Note: For LP gas use conversion kit: GT82650-1 on GT-150 & 200, GT83017-1 on GT-400
WARNING: Installation and service must be performed by a qualifi ed installer, service
agency or the gas supplier in accordance with all local and national codes. Failure to
comply with this warning can result in a fi re or explosion causing property damage,
personal injury or loss of life!
WARNING: It is the responsibility of the homeowner to keep the vent terminal clear
of snow and ice. Failure to comply with this warning can result in excessive levels of
carbon monoxide causing severe personal injury or death!
see note
WESTCAST, INC.
260 NORTH ELM STREET WESTFIELD, MA 01085
TEL. (413) 562-9631 FAX (413) 562-3799