Winnebago Chalet 27CR2006 Manual page 42

SECTION 6
– Appliances and Equipment
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!
*If your water heater is equipped with the
optional Motor Aid 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 "Motor Aid" for more
information.
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.
6-8
3. Pull the handle of the P-T valve straight out
and allow water to flow until it stops.
Open
Lift handle straight out to open P-T valve
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.
Water Heater By-Pass Valve
Your coach may be equipped with a water
heater by-pass valve for easier winterization of
water lines using RV antifreeze. See page 10-8
for valve location.
Turn the handle as shown to either by-pass or
flow through the water heater.
Normal
Flow
CAUTION
Leave by-pass valve handle in NORMAL
FLOW position if draining water and
blowing out water lines. Place in BYPASS
position ONLY when using antifreeze
solution in water lines.
Class A
By-Pass
Mode