Bradford White SW-2-40R-L Installation And Operating Manual page 20

Water Connections continued-
Figure 3 - Water Boiler Piping with Circulators
CONNECT STEAM BOILER SUPPLY PIPING
Figure 4 represents a typical steam boiler connection diagram. Refer
to the boiler installation manual or contact the boiler manufacturer for
an appropriate piping diagram. The use of a union, shut-off valves,
and a drain valve is recommended for future service convenience.
The use of an in-line "Y"-style strainer is required to prevent
accumulation of sludge in the water heater's coil.
Figure 4 - Typical Steam Boiler Connections (connections
available below the water line)
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