November 2004 / MOBILE WHISPER 6/12-6/8/10/12/16 ULTRA / EN 11
that requires provisions to be waterproof.
Also negative is that roof mounted radiators are more
sensitive for air traps.
When having enough space it would be ideal to have the
radiators vertically mounted on the roof. The expansion
tank should be above the radiator.
When having the radiators horizontally mounted on the
roof (refer to figure 22) enough space (50 mm) should be
between the roof and the fan to have a free flow of air.
When the radiators are roof mounted there should be
protection against the weather. To avoid damage while
the vehicle is driving at high speed a spoiler could be
needed.
Fig.22. Two examples of top mount radiators
3 Two speeds fan.
To keep the noise as low as possible the fans of the
radiators can run at two different speeds. The radiator
installation kits includes a control box that is used to drive
the fans with two speeds depending on the load of the
generator. When using 12/24V DC to drive the fans in
normal mode the electric motors of the fans are in series
and run at low speed. In this mode they almost produce
no noise. Only when necessary - this is controlled by
thermostat switches - the fans are switched in parallel
and will blow at full speed.
The same is achieved with 230 V fans with help of a
transformer. (refer to the connection diagrams in
paragraph 4.3 ).
2.4.3 DRY EXHAUST SYSTEM
1 General remarks
A dry exhaust muffler system should be as effective in
silencing the exhaust as a wet marine exhaust system
when applying the right mufflers. However noise could be
generated by vibrations in the mufflers and be transferred
to the chassis. Tacit factors like the length of specific pipe
sections could be important. It is very difficult to take
these factors into account.
Fig.23. Dry exhaust systems on vehicles
The standard Mastervolt exhaust kit contains the
materials to perform a professional installation. In the kit
is a stainless steel flexible bellow (hose) to allow for
expansion and to prevent vibrations to be transferred.
Rubbers are supplied to mount the mufflers flexible. The
insulation blanket for the flexible bellow and the
resonance muffler are also very effective in damping
vibrations. Still it could be that additional measures has
to be taken like an extra clamp in a vibrating section of
pipe, insulation blankets on other parts of the system and
possibly even additional mufflers.
When the exhaust is led to the roof of a
vehicle, measures has to betaken to
prevent rainwater to enter the system.
Special rain caps are available as an
option.
Fig.24. Ways to prevent water to get in
A negative feature of a dry exhaust system is the heat
radiated by its components.
Measures are taken to overcome the heat problem: The
exhaust bent to bring the exhaust out of the canopy is
cooled by water. Insulation blankets are included in the
exhaust kit to insulate the flexible bellow and the first
muffler.
When a dry exhaust has its outlet on the roof, all the
pipes inside the vehicle has to be insulated.
The exhaust pipes will be very hot and all
accessible pipes and mufflers are
dangerous to people when not insulated.
INSTALLATION
horizontal
vertical
To Next Page
Loading...
Need help?
General
