Jayco JAY FLIGHT 2023, Owner'S Manual, Page: 111 / 157

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Section 8: Plumbing System
6. If lock-out occurs before the main burner lights, turn the water heater control switch
to OFF, wait five seconds and turn the switch to the ON position. This will restart the
ignition cycle.
7.
The first start-up of the heater may require several ignition cycles before all the air is
purged form the propane lines.
If the burner will not come on, the following items should be checked before calling a ser-
vice person:
1. See if the switch is turned OFF.
2. Make sure the propane supply to the water heater is not empty or turned OFF.
3. Check to see if the reset button on the water heater ECO is tripped.
Water Heater Switch (if so equipped)
The “propane GAS” switch enables propane operation of the water heater, and the “ELEC-
TRIC” switch enables electric operation.
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NOTE: Water heaters in some models will ONLY have a single LP Gas water
heater switch. These units will not heat water electrically.
Water Heater Bypass (if so equipped)
Your RV may be equipped with a water heater bypass. This three-valve system is located at
either the water heater, or on the
utility center panel depending on your model. For detailed
information refer to the Utility Center or Fresh Water System sections.
Odor from the hot water system
Many water supplies contain sufficient amounts of sulfur to produce an odor, often called
“sulfur water”. Sulfur water can be caused by a chemical action or by bacteria. Generally,
sulfur water is not harmful, only unpleasant to smell. Refer to the water heater manufac-
turer’s manual for details on eliminating the odor from sulfur water. Odor from sulfur water
is not a service problem.
High altitude deration
Operation of the water heater at high altitudes may require derating. If the water heater is
not properly derated, lack of sufficient oxygen for combustion may produce improper burner
operation. Pilot outage caused by burner lift-off or sooting from a yellow burner may occur,
indicating the possibility of carbon monoxide. You may also notice a lack of efficiency in
heating the water because of incomplete combustion of the burner at these higher altitudes.
Consult with the local propane company, your dealer or the water heater manufacturer for
proper derating of the water heater. Change out of the orifice (derating) should be done by
the dealer or a qualified service agency.
™
NOTE: It is important that once the RV has returned to lower elevation (be-
low 4500 feet) any high altitude deration or other adjustments be reversed for
proper operation of the water heater.
Pressure and Temperature Relief Valve
The temperature and pressure relief valve is designed to open if the temperature of the water
within the heater reaches 120° F, or if the water pressure in the heater reaches 150 pounds.
When this pressure is reached, the pressure relief valve will open and water will drip from
the valve.
Do not place a valve between the pressure and temperature (P&T) valve and
the tank. Do not remove or plug the relief valve under any circumstances.
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