Draining The Water Container; Winterizing; Optional: Winterizing The Rv With A Winterizing Fluid; Winter Operation - Truma Combi eco Operating Instructions Manual

Draining the water container

Damage to the Combi furnace
caused by freezing!
• The Combi furnace does not have a frost-pro-
tection function. The water container must be
drained if the recreational vehicle (RV) will not
be used whenever there is a risk of frost.
No warranty claims for frost damage are
accepted.
To make sure that all water drains prop-
erly from the water container, place
a big enough vessel underneath the
drainage socket of the pressure relief/
drain valve (> 2.64 gallons (10 liters)).
1. Use the main switch or pump switch to
switch off the power to the water-pump
assembly.
2. Turn off or disconnect the city water connec-
tion, if present.
3. Open all water release points, e.g. cold and
hot water faucets, showers, toilets.
4. Open the pressure relief/drain valve (refer
to "Opening the Truma pressure relief/drain
valve" on page 10).
The water container will drain via the drainage
socket of the pressure relief/drain valve.

Winterizing

Severe damage to the plumbing
components and the Combi furnace!
Damage due to freezing or an unsuitable win-
terizing fluid is not covered by warranty.
• Follow the recommendations below if the
Combi furnace will be stored under freezing
conditions or for an extended period of time.
• Winterize the Combi furnace at the start of
the winter season or before traveling to a lo-
cation where freezing conditions are likely.
For winterizing, drain the Combi furnace, refer
to "Draining the water container" on page 13.
After draining the water, the Combi furnace is
protected against freezing conditions.
Optional: Winterizing the RV with a
winterizing fluid
Winterizing the RV with a winterizing fluid
is only possible with an installed bypass
kit (not in scope of supply), refer to the
RV manual.
1. Drain the water container (refer to "Draining
the water container" on page 13).
2. Turn the valves of the bypass kit accord-
ing to the supplier's or RV manufacturer's
guidelines.
3. Flush the water system with a suitable win-
terizing fluid according to the supplier's or
RV manufacturer's guidelines.
Before using the Combi furnace again
in hot water mode, remove the winter-
izing fluid and flush the water system
with potable water.

Winter operation

To operate the Combi furnace in potentially
freezing conditions, the following requirements
must be ensured:
• There must be sufficient LP gas (propane; fuel
inlet pressure 11 – 13 in. wc (27.4 – 32.4 mbar))
in the tank.
• In addition, the Combi eco plus and
Combi comfort plus models require a supply
voltage of 120 V if they are to be operated in
electric or mixed mode.
• For hot water operation, the water container
must be filled (refer to "Filling the water
container" on page 11). You must leave
the furnace powered ON whenever freezing
might occur.
Winter operation will not protect the RV's entire
plumbing system. The RV must be designed for
freezing conditions.
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