About to install a Kuuma 6 gal water
heater. The instructions have a schematic showing a bypass hose and valve teed into the engine coolant
in and out lines outside of the heater. No explanation on the reason for the bypass. I have never seen this on a heater and the old Raritan
didn't have one.
Presumably, opening the bypass valve all the way would reduce coolant
flow to the heater by half, and closing it would send 100% flow to the heater. Is this really necessary? If it's a way to regulate temperature it is pretty clunky and inconvenient.
I'm tempted to skip the bypass and just plumb direct in and out lines. Does anyone know if this would cause a problem? The engine
is a Universal M25 and the pressure water
lines are pex type plastic. Thanks in advance for any suggestions!