wallas Spartan, Technical Information

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Spartan
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Warm air ducting
Warm air ducting of the heater
It is important to plan the proper routing of the duct and the locations of the air registers. It is good to locate the heater
as near as possible to the area being heated. Avoid the use of sharp bends in the ducting and keep overall bends to a
minimum.
Outlet ducting
Heated air is distributed through the boat with 3410 ø 75mm duct. Multiple outlets can be installed by adding 3413 ø
75mm “Y” fittings leading to various locations. All duct to “Y” and duct to register connections should be clamped.
The 3411 air registers are adjustable for direction and flow and located at each duct termination point. It is important
that sufficient flow is allowed by the installed registers to maintain (limit) the heater temperature. To ensure this for
some ap-plications, the adjustment flap of the register in the bigger heated space, will be removed. Too much
resistance in the ductwork (too many flaps closed) and theheater may overheat and shut down.
If the heater will be used mainly with thermostat control, the control panel should be located in the largest heated area.
To minimize the loss of heat energy, any longruns and/or runs in areas that do not require heating can be insulated
using 3412 insulation. Insulation nearer the heater will be more effective than insulation at the far ends of duct runs.
Inlet ducting and makeup air
The heater can take air for heating (makeup air) from either the heated area (return air) or from outside the boat (fresh
air). In most cases, a mixture of both is the best choice. The upper of the 2 x ø 75 mm intake air ducts should be
installed totake fresh air from outside and the lower return air from inside of the boat. In-
take air grills 4411 should be installed into the head of the inlet ducts to preclude foreign objects from entering the
heater. Protect the outside grill from splash water, spray etc. If the makeup air will be taken from the same space where
the heater is installed, there is no need for the inlet air ducts, but protective grills should be present. There has to be
minimum 100 cm2 (16 square inches) ventilation hole in the space where the heater is installed.
Silencers
There are available silencers 3416(75mm) and 4421(90mm) for the air hoses. Especially if the inlet hose is taking air
from inside from the sleeping space, and/or warm air outlet is blowing the air to the sleeping space the silencer is
recommended to use to maximize the comfort.
Silencers reduce the sound level 50-75%.