2009 I installed a Duoetto 10 litre hot water system in our
Jayco Eagle Camper Trailer and we have had several trips using
it in both 12volt DC and 240volt AC.
the unit under the front lounge just inside the side access
hatch near the front door. This location has proved itself by
being able to access the power switches without having to lift
the cushions. The inlet plumbing may seem to be a bit technical,
but is really simple. I wanted to be able to use the water tanks
or from an external source, which could be from reticulated
supply or out of a bucket using a bilge pump when remote camping
using clean river/dam water.
The tank water
pipe comes from the right, through the grey ball valve. I wanted
to make sure there was a safety device to stop water going back
into the water tank, so I installed a brass non-return valve.
The white valve is where the external water supply is connected,
which goes into a tee and then to the pressure relief valve
supplied with the Duoetto. It is most important to connect the
overflow pipe to ensure no water goes into the trailer if the
pressure valve activates. The cigarette socket and switch is
used when using the bilge pump. The quarter turn brass tap is
used for the hot water outlet (partly blocked by the hose).
The 240 volt
proved very efficient with piping hot water, and controlled by
an internal thermostat. The location of the outlet beside the
door made it very accessible to get water for washing up.
Another tip for when the Duoetto is connected to the reticulated
supply is to install a pressure reducer in line. The one I use
is a garden irrigation fitting by Neta and this can be found in
the local hardware store.
Our 12 volt
system comprises of two 125 Watt BP solar panels, a PL20
regulator and two 120Ah AGM deep cycle batteries. The 12 volt
power for the Duoetto is controlled by a switch (black) which
turns the unit on and off when required. This have proved successful when
stopped for morning tea or lunch turning the hot water on for 20
minutes. This meant the water was hot enough when we
camped, eg to have a shower but not enough for washing the
dishes. We used a portable shower and a bucket. We do not turn
the unit on after 2pm while we were camping to conserve battery
power for the evening.
The only times
we were unable to use the Duoetto on 12 volt was when it was
raining or very overcast days. We also have a Yamaha EF1000iS
generator which heats the water in the Duoetto on 240 volt. This
works extremely well and after 30 minutes the water is too hot
to place your hand in the water. We are able to wash the dishes
and then have showers in the one heating. We are very happy with
the Duoetto Hot Water System.
and motor homes that use 240 volt most of the time, this unit
would be ideal and compact.
Thanks to Neil & Margaret for this article