Weil-McLain 550-141-826/1201 - Manual (Page 2)

HOMEOWNER and SERVICE TECHNICIAN — read and follow completely.
The following defined terms are used throughout this manual to bring attention to the presence of hazards
of various risk levels or to important information concerning the life of the product.
Indicates presence of hazards that will cause severe personal injury,
death or substantial property damage.
Indicates presence of hazards that can cause severe personal injury,
death or substantial property damage.
Indicates presence of hazards that will or can cause minor personal
injury or property damage.
Indicates special instructions on installation, operation or
maintenance that are important but not related to personal injury
or property damage.
Hazard definitions
When calling or writing about the boiler
Please have boiler model number and series from boiler rating label and CP number(s) from boiler jacket,
burner and controls. On page 28 of this manual is space to list CP number(s).
Packaged and non-packaged boilers
Packaged boilers, available only in sizes 2 through 6, are factory assembled, complete with block, jacket and
controls. Burner is shipped separately.
Non-packaged boilers, available in all sizes, 2 through 9, are shipped with block assembled, with jacket.
Controls, trim and burner shipped separately for field assembly.
Homeowner —
Read and follow all information on pages 1 through 7 ONLY.
Service technician —
Read and follow ALL information in the entire manual.
Failure to follow all instructions in proper order can cause severe personal injury, death or
substantial property damage.
Using this manual
Part number 550-141-826/1211
2
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WGO
OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 3 —
Boiler Manual