Figure 47. Pressure And Temperature Relief Valve - Tiffin Motorhomes VANLEIGH BEACON Owner's Manual

Refer to the water heater manufacturer's owner manual for details on eliminating the odor
from sulfur water.
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 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: Once the RV is returned to lower elevation (below 4500 feet) any high altitude
deration or other the water heater adjustments must be reversed for proper
operation.
Pressure and temperature relief valve
A pressure and temperature (P& T) relief valve is a safety requirement for all water heaters.
This valve releases any unsafe pressure in the water heater tank created as cold water is
heated. It is normal for the P& T relief valve to release a small quantity of water during the
heating cycle.
One way to reduce water dripping from the P& T relief valve is to maintain an air pocket at
the top of the water heater. This air pocket will form in the tank by design; however, it will
be reduced over time by the everyday use of your water heater (refer to the manufacturer's
manual); If the weeping persists, consult your dealer or a service agency authorized by the
water heater manufacturer.
Atwood

Figure 47. Pressure and Temperature Relief Valve

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