HOWTO: Summer and Winter Mode
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© 2016 by Erwin Hymer Group North America, Inc.
HOWTO: Summer and Winter Mode
Summer and Winter Mode
The 190 and 210 Popular models have the capability to operate in mildly sub-freezing conditions, provided the water system
is properly configured. To better understand this it is best to know how the plumbing is configured. The diagrams below show
how water is supplied in each mode. Solid triangles are closed valves; hollow triangles are open valves.
Fresh water system in summer
mode
Fresh water system in winter
mode
In summer mode, both fresh water tanks are in use. The interior tank is inside the vehicle and is filled via the gravity fill in the
back door frame, and the exterior tank is below the vehicle, and filled via the gravity fill in the driver's door post. The water
line between the two is open, so water flows from the higher interior tank to the lower exterior tank as the water pump draws
water from the exterior tank.
In winter mode, the line between the two tanks is closed, and the exterior tank is drained to prevent it from freezing. The
outside shower water lines are closed and drained to prevent them from freezing, and the water pump draws water from the
interior tank, which is protected from freezing by cabin heat. The hot water heater will also not freeze if left running. In this
way, hot and cold running water continues to be supplied to the galley sink, toilet, and shower.