I just installed a Wallas furnace, which replaced a
Volvo furnace. Both units are very similar. I have a seperate dedicated pick up tube in one of the
fuel tanks for the
heater, and the
heater needs to be above the top of the
fuel tank to avoid siphoning, not sure if this is the same with the
Volvo or not. Everything I have read says you should not use the supply line to your
engine to supply a furnace, it can cause trouble for both
engine and heater. Scan
Marine in
Seattle is the dealer for Wallas and they are very knowledgeable and helpful, and were familiar with the Volvo furnace, you might give them a call. The pick up tube in the tank is simple if you have an access
hatch you can get to. It just requires drilling a hole in the top of the tank and feeding the fitting up through it from inside the tank, then tightening the nut on top (mine had been removed and a bolt and washers installed to
plug the hole). The
fuel line for the Wallas was the same diameter as the old line so it fit on the old pick up tube which was still on the
boat when I bought it. Scan has new pick up tubes and fittings. Good luck, PM me if I can be any help, going to get cold this weekend. John
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