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Part number 550-142-330/0421
2
SGO
OIL-FIRED NATURAL DRAFT STEAM BOILER — SERIES 4 — Boiler Manual
HOMEOWNERandSERVICETECHNICIAN—readandfollowcompletely.
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.
When calling or writing about the boiler
Please have boiler model number and series from boiler rating label and Consumer Protection (CP) number(s)
from boiler jacket, burner and controls. On page 35 of this manual is space to list CP number(s).
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
Hazard definitions
Packaged boilers: Available only in sizes 3 through 6, are factory assembled, completed with block, collector
hood, jacket, controls and trim (damper included, shipped loose inside boiler shipping
carton). Burner is ordered and shipped separately
Semi-packaged boilers: Available only in sizes 3 through 6, are shipped with block assembled with collector hood
and jacket installed. Control, trim, damper and burner are ordered and shipped separately
for field assembly.
Knocked-down boilers: Available in sizes 3 through 9, are shipped with block assembled only. All other components
are ordered and shipped separately for field assembly.
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