Bradford White DW280L Installation & Operating Manual page 22

Double-wall indirect-fired water heater
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Water Connections continued-
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
Typical steam boiler without connections available below the water line
is not recommended due to insufficient water temperature, especially
during warmer months when the space heating system is not
operational. Boiler water temperature at the bottom of a steam boiler
can be 50°F lower than the boiler's water temperature limit setting
during such periods.
FILL BOILER SYSTEM
1. On new boiler installations, do not purge the boiler or space
heating system through the water heater. During any boiler or
space heating system flushing, cleaning, or purging, the water
heater should be isolated to avoid possible attack on the carbon
steel coil by chemical additives.
2. Purge air from boiler/water heater piping.
3. Check system for leaks. Repair as necessary.
below the water line)
NOTICE
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