Pressure-Temperature Relief Valve; Motoraid Water Heater - Winnebago Destination Manual Manual

SECTION 4 –
APPLIANCES AND SYSTEMS
quickly than a single source would alone. Use
this mode when you are using a larger than
normal volume of hot water.
Further Information
Read the operating and safety information
provided in the Water Heater Operation Manual
in your InfoCase.
PRESSURE-TEMPERATURE
RELIEF VALVE
On occasion, water may be seen seeping from
the water heater pressure temperature relief
valve. This is no cause for repair or replacement
of the valve.
Water Heater Exterior Service Access
Normally there is an air gap at the top of the
water heater tank, which acts as a pressure buffer.
In time, however, heated water may expand and
fill this air gap, causing a slight increase in water
pressure. This may cause the P-T valve to "weep"
until the air gap is manually replaced.
CAUTION
Operate this valve only when the water
heater and engine cooling system are
cold.
4-8
To Replace the Air Gap:
1. Turn off the Water Heater switch and
incoming water supply (city water and/or
demand pump).
2. Open a faucet in the motor home to relieve
water pressure.
3. Pull the handle of the P-T valve straight out
and allow water to flow until it stops.
Lift handle straight out to open P-T valve
when water heater is cold*
4. Let the handle of the P-T valve snap shut.
5. Close the faucet and turn on the water supply
before switching the water heater on.
Manually operate the pressure temperature
relief valve at least once a year.
NOTE: If your water heater is equipped with the
Motoraid system, it uses an extension
from the engine cooling system to heat
water in the water heater while driving.
The engine cooling system must also be
cold before opening the pressure-
temperature relief valve. See "Motoraid
Water Heater" for more information.

MOTORAID WATER HEATER

–If Equipped
The Motoraid uses heat from the chassis
engine cooling system to heat water in the water
heater while driving. Hoses are routed from the
engine to a heat exchanger surrounding the water
heater tank.