Water Heater; Before Using The Water Heater - Monaco Cayman 2005 Owner's Manual

WATER HEATER

The water heater uses two different methods to heat water: (1) 120 Volt AC, supplied either by
shore power or the on board generator (2) LP-Gas. The 120 Volt AC uses a heating element similar to
the type used in a house water heater. The 120 Volt AC method is efficient if shore power is available.
An automatic ignition circuit board, operated by 12 Volt DC, controls the LP-Gas. Two thermostats
control water temperature: One for the 120 Volt and the other for the LP-Gas. The thermostat tempera-
tures are preset by the water heater manufacturer and are not adjustable.
Water is pumped into the bottom of the water heater tank where it is heated and discharged from the
top when used. For ease of draining the tank during winterization, the water heater is equipped with a
pressure-temperature valve, by-pass valve and drain plug.
NOTE:
Do not operate the water heater without water in the water heater tank. Damage to
the thermostats and electric heating element can occur.
NOTE:
It is not fuel efficient to use the generator to operate the water heater on 120 Volt AC.

Before Using the Water Heater

Before using the water heater, purge all trapped air from the water sys-
tem and water heater.
To Purge the Air and Pressurize the System:
• Remove the interior access panel to the back of the water heater.
• Turn the water heater Bypass Valve (located at the back of the water
heater) to Normal Flow. If necessary replace drain plug.
• Fill the fresh water tank or hook to city water.
• Turn on the water pump or city water.
• Turn on the hot and cold valves for each faucet, one at a time.
Operate each faucet, inside and outside the motorhome, until a steady
stream of water with no air bubbles or air pockets are present. Do not
operate the water heater until the water system is purged of air.
• After the system pressurizes, inspect the water heater and water system for leaks.
CAUTION:
After purging the water lines and water heater, air may still be present. Use caution
upon opening a hot water faucet after the first heat cycle of the water heater.
WARNING:
IF YOU SMELL GAS extinguish all open flames and turn off the primary LP-Gas
valve. Do not touch any electrical switches. They may cause a spark that can ignite.
Open all windows and doors. Evacuate the motorhome. Propane is a "heavy" gas and
will lay on the floor and "hide" in corners. Liquid propane is highly volatile, explosive
and extremely dangerous. Explosion, fire, property damage, injury or death can result.
Contact a qualified service center to have the problem correctly diagnosed and
repaired before resuming operation.
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Section 4 --- Appliances
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Cayman 2005