Home Hydronic Heat 2020 01 02 Espar Heat Wiring.pdf

The heat system is hydronic in the floor with 4 zones. Each room has it’s own thermostat and also a water to air heater with a fan. There is a water to water heat exchanger between the engine cooling system to provide for heat while driving and to provide for warm engine starts if the boiler is on. There is also a water to water heat exchanger in the domestic water heater to provide hot water when the boiler is on or the engine is running.

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Wiring diagram modified in January 2020 when new Espar Hydronic-II 45K was installed.