Jayco Melbourne 2011, Owner'S Manual

Page: 58 / 106

SECTION 8
PLUMBING SYSTEM
the overflow tubes (located underneath the
RV) when the fresh water holding tank is
filled. This is normal, and is caused by
external circumstances, including the RV
being parked on an incline, or the motion
caused by starting or stopping the RV during
travel.
Do not cap, block or modify the fresh
water tank overflow tubes in any way.
Enough water pressure can build up
during the filling process to damage the
plumbing system if the overflow tubes are
obstructed.
W
ATER
P
RESSURE
R
EGULATOR
(
CUSTOMER
S
UPPLIED
)
Excessive pressure from water supply
systems may be encountered in some parks,
especially in mountain regions. Water
pressure regulators are available to protect
the RV water system against such high
pressure. Water pressure regulators
(customer supplied) are available from your
RV dealer to protect the RV plumbing system
against such high pressure.
12-V
OLT
W
ATER
P
UMP
& S
WITCH
When you want to use
water in your RV and
the RV is not hooked
up to city water, you will need sufficient 12-
volt DC power to run the water pump.
Once activated, the water pump (also known
as the demand pump) will self-prime, and
provide water. The water pump continues to
run until approximately 45 lbs. of pressure is
achieved then shut off. The water pump will
automatically re-start when pressure drops.
Some cycling may occur, depending on the
volume of water being released. The water
pump has a built-in check valve to prevent
water from back flowing.
Be careful not to overfill the fresh water
holding tank. It can pressurize the tank,
causing leakage and water damage and
void the warranty. DO NOT leave the tank
unattended while filling.
All water pump switches illuminate when the
water pump is activated. Please be aware the
water pump must be shut OFF at the same
switch used to turn it ON.
The water pump switch should be in the
OFF position when the RV is unattended
for any amount of time. If something would
happen to the water system, this may help
limit water damage to a smaller area.
Fig. 8.2 Water pump strainer
Periodically check the in-line water pump
strainer for accumulated debris. To clean,
shut off the water pump, unscrew the clear
cap, remove the re-useable metal strainer and
clear any debris, then reinstall.
W
ATER
H
EATER
Not using a water pressure regulator when
using city water may cause the o-rings to
blow. To prevent damage to the plumbing
system or components when using the city
water connection, a 45 lb. (315 KPa) rated
water pressure regulator is recommended.
Do not replace any component part with an
accessory part that is not authorized by the
water heater OEM (i.e., an “add-on”
electric heating element, etc.). Such items
are not approved to be installed, could
create an unsafe condition and will void all
warranties.
54
Fig 8.1 Water pump