Accumulator Tank - Winnebago Ultimate Advantage Owner's Manual

Initial Start-Up
1. Make sure that all water drain valves are
closed, including water heater valve. (Refer
to Section 10.)
2. Turn water pump switch to "OFF" position.
3. Fill water tank.
4. Open all faucets, hot and cold.
5. Turn on pump switch.
6. Close each faucet as it begins to deliver a
steady stream of water (close cold water
first). Leave hot water faucets on until they
also deliver a steady stream of water. This
will ensure that the water heater is filled with
water.
7. Check to be sure pump stops soon after all
faucets have been closed.
8. Pump is now ready for automatic operation.
Pump will start when a faucet is opened and
stop when the faucet is closed.

ACCUMULATOR TANK

A pressurized accumulator tank is installed in
the water line directly upstream from the water
pump located in the water pump compartment
on the right side of the coach.
The accumulator tank holds a small amount
of water under pressure of 20 psi to reduce water
line pulsation noise and pressure variations
when using the water pump system. This also
contributes to longer pump life, less pump
cycling, and less amperage draw by the water
pump from the coach batteries.
PLUMBING SYSTEMS
Accumulator Tank
NOTE: The accumulator tank has a precharge
pressure which must be checked month-
ly and maintained at 20 psi for the sys-
tem to work properly.
Adjusting Precharge Pressure
A tire-type valve stem is provided on the end
or top of the accumulator tank to check or add
air pressure. (Note arrow in above photo.)
When adding air, do not exceed 20 psi tank
precharge pressure because you may risk ruptur-
ing the pressure bladder inside the accumulator
tank.
Because of the relatively small capacity of the
bladder, check pressure with a standard tire pres-
sure gauge before adding air, then if necessary,
add air in small bursts, checking pressure
between each burst until 20 psi is attained.
Overfilling will also push the bladder too far
and reduce the volume of water held in the accu-
mulator tank, making the system inefficient.
The precharge valve stem cap must be tight
to prevent pressure leak-down.
Further Information
See manufacturer's information supplied for
your Owners InfoCase for complete mainte-
nance instructions and precautions.
SECTION 7
7-3