Hurricane Valve Positions

[Matthew Harger]

I know I saw a diagram of the Hurricanes valve positions, whether heating water or heating the coach but I can't seem to find it in the manual now.  Can both valves be open at the same time or just one at a time ?   I know the positioning for heating the water, it's the coach heating I'm really wondering about and whether both  valves are supposed to be open at once?   Thanks

[Grant Ralston]

Heating domestic water (the short circuit) has one valve open and one closed.  Heating the coach and domestic water (the long circuit) closes the open valve and opens the closed - you still have one open and one closed, but just the reverse than for the short circuit.  You can observe the differences by removing the 7 lbs pressure cap to the Hurricane expansion tank and observing the amount of antifreeze coming to the tank.  The short circuit has a stronger flow (less hose to pump thru) than the longer circuit.