Maintenance And Service; Decalcifying And Cleaning The Water Container - Truma Combi eco Operating Instructions Manual

Maintenance and service

Repairs must be performed by a qualified ser-
vice technician. Truma recommends that the
Combi furnace be inspected annually by a quali-
fied service technician.
Danger of electrical shock, fire, scalding
and/or explosion hazard!
Failure to follow safety warnings exactly and
improper servicing could result in dangerous
operation, serious injury, death or property
damage.
• Before servicing, disconnect all electrical
power to the Combi furnace.
• When servicing controls, label all wires
prior to disconnecting. Reconnect wires
correctly.
• Turn off the LP gas supply at the tank.
• Allow the Combi furnace to cool.
• Never actuate the pressure relief valve as
long as the Combi furnace is under water
pressure and/or still warm.
• Verify proper operation after servicing.
Danger of injuries due to sharp edges!
• Always wear protective gloves to avoid
injuries from sharp edges during mainte-
nance work.
There are no serviceable parts inside.
In case of a defect please contact the Truma
Service Center at 1-855-558-7862 or one of
our authorized service partners to replace the
complete furnace.
For details see www.truma.net.
16
Decalcifying and cleaning the water
container
Truma recommends decalcifying and
cleaning the water container at least twice
a year for hygienic reasons. Only use spe-
cialized and suitable products. Do not use
chlorine-based products. Read and follow
the instructions of the decalcifying agent's
manufacturer.
1. For decalcifying the water container, fill the
water container with citric acid and let it
work for some time.
2. Fill citric acid into the fresh water supply and
dilute it with fresh water according to the
supplier's specification.
3. Add more than 2.64 gallons (10 liters) of wa-
ter to fill up the water container of the Combi
furnace.
4. Drain the mixture of citric acid and water
from the water container (refer to "Drain-
ing the water container" on page 13) and
flush it with fresh water (refer to "Filling the
water container" on page 11).
In order to avoid growth of micro-organ-
isms, regularly heat the water in the boiler
to 158 °F (70 °C) as follows:
– Select energy mode "LP gas" on CP plus
control panel.
– Select the hot water level "boost" on
CP plus control panel.
– When the water temperature is reached
(the display does not flash anymore),
leave the heating switched on for another
30 minutes without withdrawing water
from the system. The residual heat in the
device will heat the water to up to 158 °F
(70 °C).