Boiler and indirect water heater

Heating · Pulse Combustion · printed page 159 (PDF page 160)

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Book index entries

Boiler – and Indirect Water Heater Water Heater – Boiler and Indirect Water Heater

Text in the illustration

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domestic cold water plumbing
tempering valve
domestic hot water
domestic cold water
heating loop omitted for clarity
primary loop
secondary loop
boiler
indirect water heater
simplified for clarity

Generated explanation

The schematic shows a boiler connected to an indirect domestic water heater through primary and secondary hydronic loops. Red and blue piping and directional arrows distinguish heated supply water from cooler return water. A cutaway in the storage tank exposes a coiled heat exchanger that transfers heat from boiler water to domestic water without mixing the two. Domestic cold water enters at the top of the tank, and a tempering valve connects the hot-water outlet to the cold-water supply. An expansion tank, circulators, valves, and boiler makeup-water connection are also shown; the space-heating loop is explicitly omitted for clarity.

Components

boiler indirect water heater storage tank coiled heat exchanger primary hydronic loop secondary hydronic loop expansion tank circulator pumps tempering valve domestic cold-water piping domestic hot-water piping boiler makeup-water connection relief valves relief discharge piping

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