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Partial Winterizing of Potable Water System with Aquago Comfort Plus Instant
Water Heater
Your Truma Aquago water heater is a very powerful device but it runs a much greater risk of
freezing because it does not have this big 15 or 23 litre tank which will be the last to freeze in cold
weather.
Even if you do not winterize the vehicle completely, consider winterizing the Aquago water heater
as soon as temperatures below the freezing point are forecast.
Quick and Simple Winterizing Procedure
1. Close the pump (photo F-1.3) and heater (photo O-7.2) using their respective switch.
2. DANGER - WARNING: To avoid splashing at step 4, open hot water taps to remove any
residual pressure in the pipes.
3. At the rear of the water heater compartment, put the A and B bypass valves (photos O-
5.2 and O-5.3) in the winter position, which is vertical, and close the return line E valve
(photo O-5.4) (turn 90 degrees to line).
4. Open the heater access door, trigger the toggle lever (photo O-7.1) and keep in a
horizontal position until water stops flowing, about 2 minutes (photo O-6).
5. Remove the filter cartridge (photo D-6). And store it in the ALTO.
6. Close the toggle lever (photo O-7.1) and close the access door. Your heater is now
protected from freezing but NOT the rest of the plumbing.
1 2 3 4
PHOTO O-5
Bypass valves, E-valve, return valve
1
PHOTO O-6
Toggle lever
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