Explorer Group 2003 Tourers, Owner'S Handbook Manual

Page: 30 / 110

WATER HEATER SYSTEM
MAINTENANCE
The water heater should be serviced annually
during the routine caravan service.
Repairs
Repairs should only be carried out by qualified
personnel as the warranty will be void if
unqualified persons attempt repairs. Only
original Truma parts should be used.
De-scaling
Introduce wine vinegar into the water system
and allow time for it to react with the scale then
flush out thoroughly with fresh water.
Hygiene
The water tank in the Truma Ultrastore is made
of high quality stainless steel, however, in order
to avoid colonisation of micro-organisms the
tank should be heated up to 70ºC (with
electrical heater) at regular intervals. Water
from the hot tap should not be used for drinking.
Fuses
The water heater fuse is on the electronic
control unit on the heater.
IMPORTANT Only replace the miniature fuse
on the p.c.b. with a fuse of the same type:
1.25 AT EN 60127-2-3 (slow action).
Safety
There is no danger of exhaust gas pollution in
awning spaces from water heaters which vent
into them but it is advised that fresh air
circulation should be provided and any window
immediately above the flue outlet should be
kept closed.
Please ensure that, when you fit your awning to
the side where the water heater flue is fitted,
there is sufficient ventilation in the awning to
take account of the exhaust and condensation
created by the flue.
WARNING
Water heaters (as with other
appliances) should be turned off and
gas cylinder valves closed whilst the
caravan is in motion.
Sterilising the system
At the start of the season or if the caravan has
not been used for some time, sterilise the water
system thoroughly by preparing about 10 litres
of water, containing a sterilising agent made
specially for the purpose. This should be
available from your Explorer Group retailer.
When an on-board tank is fitted, ensure that
sufficient mixture is prepared to fill the whole
tank.
DO NOT use domestic bleach, camden tablets
or sodium metabisulphide.
Pump about half of the solution through the
system, opening all taps in turn and leave for
not longer than 30 minutes. Pump the
remainder through. Drain the water heater and
water tank (if fitted) then pump at least 18 litres
of fresh water through the system again,
opening all taps in turn, then drain again.
Similar attention should be paid to the hygiene
of the external water container and submersible
pump and hose used to draw off water.
DO NOT use water which has stood in a water
container for any length of time and do not use
garden hoses for filling tanks.
Water filter (where fitted)
Replace the in-line filter cartridge with a new
one after sterilising the water system. On no
account should the old cartridge be used again
as the sterilising agent will have saturated the
filter bed.
After fitting the new filter flush the system for
around 30 seconds to remove any loose
particles of carbon. It is recommended that a
new filter is fitted at the sart of each season
after sterilising the system and again after
approximately 30 days usage as the filter
becomes less effective after this period.
On no account should the old cartridge be
used again as the sterilising agent will have
saturated the carbon bed.
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Full details of how to operate your water heater are explained within the Truma Handbook contained within your Owner’s Information Pack.