Nucamp Cirrus 620 2021 Owner's Manual page 31

While the Nautilus system instructions are generalized instructions, the
following steps outline more detailed instructions for winterizing the fresh water & waste water
plumbing systems in your camper:
1. Empty all black and gray tanks into an appropriate disposal. They must be as completely
empty as possible.
2. Level your camper or tilt it in such a way that the water in the tanks flows toward the low
point and tank drain openings.
3. Turn the handles on the Nautilus Panel to Power Fill Mode.
4. Open all drains in the unit:
a. Fresh water tank drain
b. Low point drains (Red and blue Alde drain valves)
c. Hot water tank drain (Yellow Alde drain valve. Vertical position is open, horizontal
is closed)
d. Gray & black tank knife drains.
5. Open all water fixtures.
a. Sinks
b. Toilet (Flush)
c. Shower
d. Exterior shower
6. When water has stopped flowing from all openings, close the drains and
7. Turn the handles to a 45 degree angle as shown in the Nautilus Panel
Winterizing Instructions.
8. Connect an air hose to the city water connection. You will need an adaptor with a
pressure gauge.
9. When blowing out the system with air, DO NOT exceed 30 PSI pressure in the plumbing
lines. Damage may occur to the inline water regulator and other plumbing components.
The freshwater tank overflow drain is always open, so the tank does not become
pressurized with either air or water. The fresh water tank should never have more than 2 PSI
pressure in it.
10. Blow air into the system and, always keeping one drain open, open each fresh water drain
one by one until no more water is released.
a. Fresh water tank drain
b. Low point drains (Red and blue Alde drain valves)
c. Hot water tank drain (Yellow Alde drain valve. Vertical - open, horizontal - closed)
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