Jayco SENECA 2010, Owner'S Manual

Page: 59 / 108

SECTION 8
PLUMBING SYSTEM
The water heater is designed to heat water
quickly and efficiently. The water heater OEM
has preset the sensing limit to maintain the
water temperature when the water heater is
activated. If you have not used the water
heater for two weeks or more it may result in
hydrogen gas in the water lines. To reduce
the risk of injury under these conditions, open
the hot water faucet for several minutes at the
kitchen sink before you use any electrical
appliance connected to the hot water system.
If hydrogen is present, you probably will hear
an unusual sound such as air escaping
through the pipe as the water begins to flow.
Hydrogen gas may be present even after
water has been drained from the tank. Open
faucet at the sink and allow the water system
to vent for five to ten minutes (or as needed).
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. To eliminate sulfur water
sanitize the water heater. Odor from sulfur
water is not a service problem.
High altitude deration
Operation of the water heater at high altitudes
may require derating. Consult with your local
propane gas company, RV dealer or the water
heater manufacturer for proper derating of the
water heater. Change out of the orifice
(derating) should be done by your RV dealer
or a service agency authorized by the water
heater manufacturer. It is important that once
the RV has returned to lower elevation any
high altitude deration or other adjustments be
reversed for proper operation of the water
heater.
Pressure & temperature relief valve
When cold water is heated in the water heater
tank, the water pressure will rise. For this
reason, a pressure and temperature (P&T)
relief valve is required for safety in all water
heaters. It is normal for the P&T relief valve to
release a small quantity of water during the
heating cycle and does not indicate a
defective P&T relief valve. One way to reduce
the frequency of the water weeping or
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 OEM operator’s manual); If the
weeping persists consult your RV dealer or a
service agency authorized by the water heater
manufacturer.
Water heater control switches
The water heater control rocker switches are
located in the Command Center. The
"propane GAS" water heater switch enables
propane operation of the water heater. The
"ELECTRIC" water heater switch enables
electric operation of the water heater.
Operating instructions
HYDROGEN GAS IS EXTREMELY
FLAMMABLE.
Do not smoke or have any
open flame near the open faucet. On DSI
water heater models make sure the interior
control switch is OFF during the above
listed procedure.
If you smell propane gas then
STOP!
and
follow the procedures listed in
Sec. 3
Propane System
before attempting to
operate the water heater.
STOP!
Read the safety and operating
information provided in the OEM operator’s
manual before attempting to activate the
water heater. Make sure the water heater is
filled with water before using the water heater;
momentary operation of the water heater
without water in it can be detrimental.
Draining and winterization
If the RV is to be stored over the winter
months, the water heater must be drained to
prevent damage from freezing. It is
recommended the water heater be drained
and bypassed during the winterization
process particularly if introducing RV
antifreeze into the plumbing system.
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