wallas Nautic 40D User manual

WALLAS 40D Operator’s Manual and Installation Guide
1
© 2010 Two Mac Inc.

WALLAS 40D Operator’s Manual and Installation Guide
2
Operation
Nautic 40D is a marine diesel furnace with no open flame, intended for recreational use.
Use as a live aboard product will mean more frequent servicing, not covered by
warranty. The furnace extracts combustion air from the installation space through a slot
in its base and blows the exhaust gases overboard. This process forces replenishment of
damp cabin air with drier, oxygen rich air from outside. As the fuel burns, the released
heat is transferred to the air circulating in the air ducts via heat exchanger. The furnace
heating power is fully adjustable by way of a rheostat. The return and fresh makeup air is
brought to the heat exchanger by way of inlet ducting. Thanks to this suction duct
capability the furnace can also be installed in a diesel engine room. The furnace can
also be used as a ventilator, circulating air in the boat without heating through the air
ducts. This keeps the air fresh in the boat in hot weather. The heating capacity of the
device is best suited to 30’ – 42’ boats. Control panel options include a Basic Control
Panel with indicator lamps or a Digital Info Control Panel. The furnace is made entirely of
marine grade materials.
Table 1: Technical details of furnace 40D.
TECHNICAL DETAILS
Fuel Diesel #1,#2, kerosene, JP4, Klean Heat
Operating voltage 12 V DC
Fuel consumption 0.03 – 0.11 US gph
Heating capacity 1.3–4 kW (4,000 – 14,000 btu)
Heating air volume 132 cfm
Ventilation air volume 85 cfm
Power consumption 1.8 - 4.4 A running, 8 A for about 6 min at ignition.
Dimensions 151/4” x 121/8” x 51/2”
Weight Approx. 22 lbs
Maximum permitted length of exhaust hose 13’ (Ø 28 mm) See page 3
Maximum permitted length of fuel hose 26’
Maximum permitted length of warm air duct 26’ x 3” ID
Maximum permitted length of return air duct 7’ x 3” ID
Minimum area of the combustion air opening 16 square inches
Applicable exhaust through hull fittings 3468, 2467 and 2460+2069
Accessories 3004 Basic Control Panel, 3005 Info Control Panel
Package contents
Furnace
1 pc Accessory Bag
4 m Power cord
4 m Fuel hose with filter and adapter kit
1 pc Mounting bracket
1 pc Damper kit
Contents of the accessory bag:
6 pcs Mounting bracket screw 5 x 16
2 pcs Mounting bolt M8 x 120
2 pcs Corrugated base plate M8
1 pc Hose clamp 20/32
4 pcs Air duct fixing clamp 60/80
1 pc Fuse box bag

WALLAS 40D Operator’s Manual and Installation Guide
3
Mounting the device
Attach the furnace mounting bracket to the dampening plate (figure 2). Attach the
dampening plate to the bulkhead (figure 3). Attach the furnace to the mounting piece by
clicking the rails of the mounting piece to the grooves in the sides of the furnace (figure
4). Lock the furnace in place through its suspension loops with the two long mounting
bolts (figure 5). The furnace can be fitted to the bracket with the outlets at either end.
Mounting the control panel
Control panels are attached to the wall with the enclosed screws (figure 6). If desired, it
is possible to flush mount by removing the collar of the control panel, although this collar
needs to be used on the Info Panel if the thermostatic feature is to be functional.
NOTE: This furnace is made for marine use at or near sea level. Not for unattended
use.
Space Requirements
The furnace may be mounted either on a bulkhead or under the deck, and should be
vertical when the boat is on an even keel. Although the furnace can withstand some
tilting and large angles temporarily, the burner will not perform optimally if it is constantly
at an angle.
The installation must maintain a minimum of 8 inches under the furnace to facilitate
maintenance, otherwise removal of the unit will be necessary for maintenance.
To avoid galvanic corrosion, the furnace should be isolated from the metal framework of
the boat.
Take into consideration that the standard length of the control panel harness is 20ft. A
33ft extension is also available.
Exhaust pipe
The longest permissible exhaust gas pipe is 13ft. Exhaust runs over 8’ should not have
more than 360 degrees of turns. Turns should be as long radius as the installation
allows.
The exhaust through hull fitting may be installed into the hull, the transom or the deck,
depending on fitting type, hull design and other factors. If a deck fitting is desired and
heavy water on deck is expected, then a closeable deck fitting (2460) with an extension
(2069) should be used. On heeling sailboat through hull applications, the through hull
fitting should be installed as far aft as possible, preferably at the stern. Recommended
distance from the through hull fitting to the surface of the water is at least 12 inches.
Exhaust gas is hot! The exhaust pipe and fittings must be insulated well and installed
away from flammable materials. Air must be allowed to flow freely past either the
through hull or deck fitting. Please contact Scan Marine for information.

WALLAS 40D Operator’s Manual and Installation Guide
4
Figure 2: Joining the mounting bracket and optional
dampening plate. If purchased, the screws needed are
in the auxiliary bag of the dampening plate.
Figure 4: Attaching the furnace to the
mounting bracket.
Figure 3: Attaching the mounting assembly to
the bulkhead with four 5 x 16 standard
screws.
Figure 5: Locking the furnace in place with
two M8 x 120 lockin
g
bolts.
Figure 6: Attaching the control panel.
Note: either the 3004 or 3005 can be
mounted with or without the bezel
shown here. 3005 panel must have
the bezel fitted for thermostat to
function properly.
Figure 3: Attaching the mounting assembly to
the bulkhead with four 5 x 16 standard
screws.
PLEASE NOTE: If the optional dampening
plate is not purchased, simply attach the
mounting bracket to a vertical wall or
bulkhead. In either case, the furnace
assembly can be installed into the bracket
with the heat outlets pointing to the right
or the left side relative to the bracket.

WALLAS 40D Operator’s Manual and Installation Guide
5

WALLAS 40D Operator’s Manual and Installation Guide
6

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.

WALLAS 40D Operator’s Manual and Installation Guide
8
Inlet air ductlng
Inlet air for the Nautic 40D furnace is taken through two 3 inch (75mm) air ducts. This allows the
furnace to be installed in the engine compartment or other spaces where the air may be foul.
One of the 2 x 3 inch (75mm) suction connections of the furnace is installed to extract fresh air
from the outside, and the other to extract air from inside the boat. Protective grilles without
throttle valves are attached to the ends of the suction pipes, and the opening for outdoor air also
needs to be protected appropriately against the weather.
For safety reasons the furnace must not be installed In a place where gasoline fumes
might be present.
The suction air is taken in via two branches of ducting. One inlet duct should take in some fresh
air and the other inlet duct should take in return air from inside the boat. (See Figures 12, 14,
15)
The longest permissible length of one branch of the suction air duct is 8 ft, based on a minimum
diameter of the inlet air ducts being 3" to prevent excessive pressure drop.
Protective grilles should be connected to the ends of the inlet ducts. These grilles are available
from Scan Marine.
Protect the opening of the fresh air inlet ducts with some form of weather/vermin shield.
Protective shields for this purpose are available at most marine supply stores.
All inlet duct connections should be secured with hose clamps.

WALLAS 40D Operator’s Manual and Installation Guide
9
Operation Using Basic
Control Panel
Heating
The furnace starts when the
power switch is turned to the
HEAT position. There is first
a self testing phase during
which the yellow and red
lamps blink in turn. Then the
yellow power indicator lamp
will light up and the actual
ignition process will begin.
Ignition takes about 5
minutes during which the
red heating lamp will light
up. The heating lamp is lit
when the combustion has
stabilized in the burner.
After ignition the furnace can
be adjusted with the control
panel. The furnace will not
necessarily start on the first
try after installation, when
the fuel hose is empty.
Failure to start is indicated
when the heating light starts
to blink after the start-up. If
this happens, move the
power switch to the OFF
position. The furnace cannot
be restarted until the cooling
fans have stopped and all
indicator lamps have gone
out. Once the indicator
lamps have gone out, restart
the furnace by switching it to
the HEAT position.
Stopping
Turn the power switch to the
OFF position to switch off
the furnace. The cooling
cycle of the furnace takes
about 10 minutes after
switch-off. During cooling
the power lamp is lit, and the
red heating lamp blinks.
After cooling all indicator
lamps will go out.
Ventilation
Turn the power switch to
VENT position to start
ventilation. Both the yellow
power indicator lamp and
the green ventilation
indicator lamp light up
immediately. The efficiency
of the ventilation air flow can
be adjusted with the power
adjustment knob. Turn the
power switch to OFF
position to stop ventilation.
BASIC CONTROL
PANEL
Figure 16: Basic Control Panel
3004
Power switch
Power adjustment
Heating indicator lamp
Ventilation indicator lamp
Power indicator lamp