does a great job of providing piping hot showers to several people every morning when we're cruising.
As long, that is, as we have used the immersion heater
either from shore power
Running the engine
doesn't seem to heat up the calorifier
, although I have checked and double checked the valves.
Is it simply a matter of temperature? The water
in the calorifier is held at a very high temperature, I would guess about 90C, and is mixed with cold water
to provide "hot water", thus stretching the capacity. The engine
fresh water cooling
circuit doesn't run at 90C, so maybe it just doesn't create the same temperature?
Or is something else wrong? The calorifier has pressure relief valves or thermostats on the heat exchanger
loops (see photo) which look like the ones you see on hydronic radiators. I don't know why such devices are needed. Maybe I've got them set wrong? Anyone have any ideas?