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P/N# 240009449, Rev. A [07/2012]
RETAIN THESE INSTRUCTIONS FOR
FUTURE REFERENCE
These instructions must be affi xed on or
adjacent to the boiler.
GWB9-050IH-2
GWB9-075IH-2
GWB9-100IH-2
GAS-FIRED, DIRECT VENT,
CONDENSING, HOT WATER BOILER
INSTALLATION
INSTRUCTIONS
PRODUCT LITERATURE
Lennox Industries Inc.
Dallas, Texas
This boiler cannot be used with all types
of chimneys. Read these instructions
carefully before installing.
GAS-FIRED HOT WATER BOILERS
These low pressure gas fi red hot water boilers
are design certifi ed by CSA (Canadian Standards
Association) for use with natural and propane
gases (100 MBH model is certifi ed for natural gas
only). They are constructed and hydrostatically
tested for a maximum working pressure of 50
psi (pounds per square inch) in accordance
with A.S.M.E. (American Society of Mechanical
Engineers) Boiler and Pressure Vessel Code
Section IV Standards for Heating Boilers.
WARNING
Improper installation, adjustment,
alteration, service, or maintenance
could result in death or serious injury.
Refer to this manual for assistance. For
additional information consult a qualifi ed
installer, service agency, or the gas
supplier.
!