Originally Posted by Wakadui
I suspect not given the presence of a main and reservoir coolant tank.
It wouldn't make any sense to install a hydronic system and not include a heat exchanger
to the engine--especially if it was professionally installed. Trace the lines back and it would be pretty easy to find the heat exchanger
The fact that you have two coolant tanks
only means that you have two coolant tanks
. The theory behind this is to heat up enough "coolant" so that the system won't cycle so much. Most of these systems want a minimum amount of liquid flowing through them, and the way to achieve that amount on many boats is to add an extra tank.
My advice is to find the contractor who installed the system, and pay him for an hour's worth of his time to walk you through the system. You really don't want to have a system like that on a cruising boat without knowing where the trap doors are located. For example, is there a bleeding valve, or a winter valve, or....?