Monaco 2002 Diplomat, Service Manual

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If the motorhome is stored where freezing temperatures may occur, drain
the domestic fresh water loop completely of water. When draining the
domestic fresh water system begin with draining the fresh water tank by
opening the point drain lever for the fresh tank and allowing the water to
drain.
NOTE: Ice makers, water filters, water purifiers and water
heaters all use domestic water and should be drained and
stored in accordance with the manufacturer’s recommenda-
tion for winterization.
The method chosen to winterize the motorhome and water lines is up to
the motorhome owner. The lines can be air blown to remove standing water
or the lines can be filled with an approved FDA RV antifreeze. Either way,
all interior and exterior faucets need to be opened and closed, one at a time,
to be checked. All low point drains should be opened and the holding tanks
emptied.
To use air pressure to winterize the motorhome you will need access to an
air compressor and an adapter to connect the air line to the water system.
Adapters can be found at any RV supply store. When hooked to the water
lines the pressure should not exceed 40 psi. Higher pressure can damage the
lines.
1. Remove water filter cartridge and replace filter with diverter cap
(see WATER FILTER). Diverter cap comes with motorhome
and will be stored inside. With diverter cap installed it creates a
bypass in water lines.
2. Drain the fresh water tank and lines by opening the tank drain
valve and the low point drain valves located in the outside water
control service compartment of the motorhome.
3. Let all the water drain. Turn the pump on and allow it to run so
that all the water is cleared out of the pump and lines. Turn the
pump off.
4. Remove water heater drain plug and open pressure release valve
located in the outside water heater access compartment.
5. After the water is drained, hook an air hose to the city water con-
nection located on the water control panel in the outside service
compartment. Blow out the water lines until no further water can
be seen coming out of the drain lines. Do not exceed 40 psi in
the water lines and faucets.
6. Move water heater bypass valve to BYPASS setting located next
to water heater. Replace the water heater drain plug and close
the pressure release valve. Open all faucets (including the out-
side spigot) one at a time while the air is on, to clear water from
the faucet supply lines. Do not forget to drain your shower.
Water Systems
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D I P L O M A T
6 • 1 8 3
STORAGE -
COLD WEATHER
WINTERIZING -
Using Air Pressure