Water Pump; Water Heater - Thor Motor Coach 2009 Mandalay Owner's Manual

WATER SYSTEMS
NOTE: There is an overflow line that will drain onto the ground if the tank is filled beyond
capacity. Always fill the tank with potable water from a known safe source using a hose
designated for potable water.

Water Pump

The self contained water system is a demand only system. This means the system must be
pressurized. A self-priming 12 Volt DC pump is provided to handle this function. This means that
the water pump will run whenever there is a need for water. If the pump runs when all faucets
are closed, there may be a leak in the system. If this happens turn the pump OFF and have the
systems checked by a qualified service center. When initially starting up the self contained
water system, follow this procedure:
1. Make sure the tank is filled with water.
2. Open all the faucets in the motorhome - both hot and cold.
3. Place the pump control switch to the ON position. There are two water pump
switches - one in the systems compartment and the second is located in the
bathroom. Both switches must be ON for the water pump to operate.
4. Allow time for the hot water tank to fill. Shut off each faucet as the flow becomes steady
and free of air. When the last faucet is shut off, the pump should also shut off.
5. The system is now ready for use.
NOTE: When filling the system, you may want to add additional water to the tank to replace the
water used when filling the hot water tank and water lines.

Water Heater

Do not operate the water heater without water in the water heater tank. This can damage
the thermostats and the electric heating element.
The water heater operates by using one of two methods. The first method is 120 Volt AC
supplied either by shore power or the on-board generator. The 120 Volt AC uses a heating
element similar to the one found in a standard electric home water heater.
The second method uses Propane Gas. The Propane Gas incorporates the use of an Automatic
Ignition Circuit Board operated by 12 Volt DC.
NOTE: The Automatic Ignition Circuit Board will make three attempts to light the burner. If the
burner does not light by the third attempt, the Ignition Circuit Board will go into "lock-out".
Cycling the ON/OFF switch will reset the Ignition Board.
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MANDALAY