Holiday 2002 NEPTUNE, Owner'S Manual

Page: 146 / 344

Appliances
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2 0 0 2 N E P T U N E
4 • 146
The water heater bypass is a valve located
on the back of the water heater. By turning the
valve to BYPASS position, water diverts away
from entering the water heater. The water
heater should be in the BYPASS position when
winterizing. Bypassing the water heater will
keep antifreeze out of the water heater, if
antifreeze is used for winterization.
For water heater operation turn the valve so
that the handle points to NORMAL FLOW.
The water heater is equipped with a Pressure-
Temperature relief valve. The water heater may dis-
charge at the Pressure-Temperature relief valve during the
heating cycle, due to thermal expansion of water. The
Pressure-Temperature relief valve is designed to open if the
water temperature within the heater reaches 210° F
(98.8° C), or if the water heater pressure reaches 150 psi.
This can be related to the fact the motorhome utilizes a
closed system. A discharge is a normal occurrence and is
not necessarily a faulty valve. The water heater has an inter-
nal air pocket to reduce the possibility of dripping or weep-
ing. Eventually, the expansion of the water will absorb the
air pocket. When this occurs, utilize the following proce-
dure to replace the air.
CAUTION: Ensure the water heater tank is cool prior to
checking the valve.
To Replace the Air Pocket:
1. Turn OFF the water heater.
2. Shut OFF the incoming water supply.
3. Open the closest hot water line of the motorhome.
4. Pull the handle of the relief valve until the flow of water stops.
5. Allow the relief valve to snap shut, close the hot faucet and turn on
the water supply.
6. Turn ON the water heater.
The air pocket is re-established; the process need not be repeated until the
next discharge of water. If the discharge does not stop, contact a qualified serv-
ice center to evaluate the valve and make any required repairs.
Water Heater
Bypass System
Pressure - Temperature Relief Valve
OM130039
OM130006
OM040463