wallas Nautic 40D, Operator'S Manual With Installation Manual

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WALLAS 40D
Operator’s Manual and Installation Guide
7
Location in relation to the fuel tank.
The longest permissible fuel line is 26ft; the supplied length is 13ft. The fuel line must always
contain a Wallas fuel filter.
We recommend that the furnace is placed 15 to 24 inches higher than the average level of fuel
in the fuel tank. The fuel pump has been adjusted for this difference in height.
If the fuel level in the tank is more than 15 inches above or more than 60 inches below the
furnace, the pump must be adjusted according to separate instructions available from your
Wallas service center.
A solenoid valve must be installed into the fuel line near the fuel tank if the surface of the fuel is
above the furnace. Contact Scan Marine with any questions you may have.
Warm-air ducting
The furnace is equipped with 2 x
3 inch (75mm) blower connections. In order to secure sufficient
air flow, the heating air must be divided into at least three outlet vents.
The ducting attaches to two 3 inch (75mm) outlet adaptors at the end of the furnace.
The longest permissible length of one branch of the warm air duct is 26 ft.
The minimum diameter of the warm air ducts is 3" to prevent excessive back pressure, based
on a minimum of three outlets.
The 3 inch outlet vents installed at the ends of the warm air ducts are equipped with an air valve
to regulate the flow of warm air into the cabin. The air valve should be removed from the vent in
the branch leading into the area needing the most heat. The flow of air to other areas may be
controlled by adjusting the position of the appropriate valve. (See Figure 11)
The use of a booster fan (P/N 3415) is recommended for ducts of excessive length. Information
about the booster fan and its use is can be obtained from your Wallas dealer.
All ducts over 3 ft. long, passing through unheated spaces should be insulated and
all duct connections should be secured with hose clamps.