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WEil·mrlAIN®
Series 3
Gas-Fired Water Boilers
Boiler Manual
• Installation • Maintenance
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• Startup
• Parts
DO NOT USE BOILER DURING CONSTRUCTION
unless you provide dust-free air
to
the
boiler area or follow the requirements
given
on page 9.
Failure
to comply could result in severe
personal
injury, death or substantial property
damage.
This manualmustonly
be
used
by
a qualified heatinginstaller/service technician.
Before Installing,
read
all instructions, including this
man
ual, and any related
supplements.
Perform
steps
in
the
order given.
Failure
to
comply could result
in
severe personal
injury,
death or
substantial
property damage.
Part
Number
550-142-780/0712