Replacement Parts; Troubleshooting - Rheem PVG Installation, Operation And Service Manual

MAINTENANCE (CON'T)
WARNING
OBSTRUCTIONS OR HOLES IN THE VENT PIPE CAN CAUSE TOXIC
FUMES TO ENTER THE HOME RESULTING IN CARBON MONOXIDE
POISONING OR DEATH. THE VENT PIPE MUST BE REPLACED IF IT IS
.
LEAKING

REPLACEMENT PARTS

Replacement parts may be ordered through your plumber or the local
distributor. Parts will be shipped at prevailing prices and billed accordingly.
When ordering replacement parts, always have the following information
ready:
1. Model, serial and product number.
2. Type of gas.
3. Item number.
4. Parts Description.
See page 26 for a list of available repair parts.

TROUBLESHOOTING

Water heater service should only be performed by a qualified service
technician. Refer to the Trouble-shooting Chart on pages 24 and 25 for
determining the cause of water heater problems.
SELF-CLEANING (SOME MODELS)
Some water heaters may include a self-cleaning "DE-LIMER" device that
inhibits the build-up of lime and other sediment on the metal surfaces of the
water heater. By installing a series of magnets in the dip tube, a magnetic
field is formed which automatically suspends lime-causing particles and
sediment as cold water passes into the tank. This controls sediment and lime
build-up within the tank resulting in higher efficiencies and lower operation
costs.
REMOVING THE BURNER ASSEMBLY
WARNING
REMOVAL AND REPLACEMENT OF THE BURNER ASSEMBLY INVOLVES
THE DISCONNECTION OF GAS PIPING AND LEAK TESTING. THE
FOLLOWING PROCEDURES SHOULD ONLY BE PERFORMED BY A
QUALIFIED SERVICE TECHNICIAN.
1. Turn the gas control knob on the combination gas control
valve/thermostat clockwise to the "OFF" position.
2. Disconnect electrical
power to water heater.
3. Label all wires before
disconnecting. Disconnect
wires from the pressure
switch and solenoid valve.
4.
Remove the outer and
inner doors.
5. Disconnect the
thermocouple, pilot tube,
bleed tube and manifold
extension at the
thermostat (Figure 22).
Note that L.P. gas
systems use reverse (left-
handed) threads on the
manifold tube.
22
6. Grasp the manifold tube and push down slightly to free the manifold,
pilot tube, bleed tube and thermocouple. Pull the burner out slightly to
free it from the holding bracket. Tilt the burner to one side and remove
it from the burner compartment (Figure 23).
7.
Check the burner to see if it is dirty or clogged. The burner may be
cleaned with soap and hot water. If a sooty condition exists, refer to the
Troubleshooting Chart , "Smoking and Carbon Formation".
REPLACING THE BURNER ASSEMBLY
1.
Insert the burner into the burner compartment making sure that the
manifold tab engages with the
holding bracket inside the burner
compartment (Figure 24). The tab
is located at the bottom of the
burner for L.P. models. The
manifold tube will now line up
with the thermostat connection.
2. Reconnect the manifold extension,
bleed tube and pilot tube. Do not
cross thread these fittings. L.P.
gas systems use reverse (left-
handed) threads on the manifold tube. Do not apply any thread sealant
(pipe dope, Teflon tape, etc.) to these connections.
3. Reconnect the thermocouple. The thermocouple nut should be started
and turned all the way in by hand. An additional quarter turn with a 3/8"
open end wrench will then be sufficient to seat the lockwasher.
IMPORTANT: Overtightening may damage the thermocouple or the
thermostat.
4. Reconnect wires to pressure switch and solenoid valve. Turn on
electrical power to water heater.
5. Relight the water heater according to the lighting instructions in Figure
17A or 17B..
6.
Check for gas leaks with a chloride-free soap and water solution or
other approved method. FIX ALL LEAKS IMMEDIATELY.
DANGER
DO NOT USE AN OPEN FLAME OR ANY KIND OF SPARK TO CHECK GAS
PIPING FOR LEAKS. IF LEAKING GAS IS PRESENT, AN EXPLOSION OR
FIRE MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY
OR DEATH.
NOTE:
The burner assembly shown in Fig. 23, and 25 are typical for Natural Gas
models. LPG models and models equipped with Low Nox burners will vary in
appearance.