11
Figure 9 - Steam Boiler
NOTE: On Steam Boiler Applications (Only recommended on
Series 63
TM
and Series 64
TM
boilers), the indirect heat exchanger supply
and return connections must be below the water line from the boiler
connection. The internal flow check or spring check must be used
to avoid thermal siphoning from the connected boiler. A basket
strainer should also be used to avoid sludge and sediment getting
into the pump or heat exchanger. See also Series 63
TM
and Series 64
TM
installation manual for further information.
Figure 10 - Multiple Tank Installation
NOTES:
1. Minimum pipe size should match connection size. Upsize pipe accordingly if greater flow is required.
2. A thermal expansion tank suitable for potable water must be sized and installed within this piping system between the backflow preventer
and the cold water inlet.
3. All circulators should have an integral flow check.
4. Drains and check valve between heating appliance and water heater will assist in purging air from system.
5. This drawing is meant to demonstrate system piping only. The installer is responsible for all equipment and detailing required by local
codes. In Massachusetts, you must install a vacuum relief valve per 248 CMR.
6. Mixing valve application is optional, but recommended to help prevent scalding. See Part 3, Section E for more information.
7. All piping in parallel used for large dumps of hot water, high usage, and short duration.
8. Massachusetts requires a limit of four (4) tanks per mechanical room. Consult with your local inspector.
BOILER
