Troubleshooting - Rheem RGPH Installation Instructions Manual

IMPORTANT: Do not operate the
system for extended periods without
filters. A portion of the dust entrained
in the air may temporarily lodge in the
air duct runs and at the supply
registers. Any recirculated dust
particles will be heated and charred by
contact with the furnace heat
exchanger. This residue will soil
ceilings, walls, drapes, carpets, and
other household articles.
SYSTEM OPERATION
INFORMATION
Advise The Customer
1. Keep the air filters clean. The
heating system will operate better,
more efficiently and more
economically.
2. Arrange the furniture and drapes so
that the supply air registers and the
return air grilles are unobstructed.
3. Close doors and windows. This will
reduce the heating load on the
system.
4. Avoid excessive use of kitchen
exhaust fans.
5. Do not permit the heat generated by
television, lamps or radios to
influence the thermostat operation.
6 Except for the mounting platform,
keep all combustible articles three
feet from the furnace and vent
system.
7. IMPORTANT: Replace all blower
doors and compartment covers after
servicing the furnace. Do not
operate the unit without all panels
and doors securely in place.
8. Proper operation of the system with
constant air circulation.
ANNUAL INSPECTION
The furnace should operate for many
years without excessive scale build-up
in the flue passageways, however, it is
recommended that a qualified installer,
service agency, or the gas supplier
actually inspect the flue passageways,
the vent system and the main and pilot
burners for continued safe operation
paying particular attention to
deterioration from corrosion or other
sources.
36
WARNING
!
HOLES IN THE VENT PIPE OR HEAT
EXCHANGER CAN CAUSE TOXIC
FUMES TO ENTER THE HOME
RESULTING IN CARBON
MONOXIDE POISONING OR DEATH.
THE VENT PIPE OR HEAT
EXCHANGER MUST BE REPLACED
IF THEY LEAK.
If during inspection the flue
passageways and vent system are
determined to require cleaning, the
following procedures should be
followed (by a qualified installer,
service agency, or gas supplier):
1. Turn off electrical power to the
furnace and set the thermostat
lever to the lowest temperature.
2. Shut off the gas supply to the
furnace either at the meter or at
a manual valve in the supply
piping.
3. Remove burner door. On downflow
models, the blower door and
burner door flange must also be
removed.
4. Disconnect gas supply piping from
gas valve.
5. Remove screws (4) connecting the
burner tray to the center panel.
6. Disconnect wiring to the gas valve.
Make sure to mark all wires
disconnected for proper
reconnection.
7. Remove burner tray and manifold
assembly from the unit.
8. Remove all screws in the unit top
plate. Remove the top plate along
with connecting pressure switch
from the unit.
9. Remove screws connecting draft
inducer to center panel. Also
remove wiring to draft inducer at
this time.
10. Remove screws (11) on perimeter
of heat exchanger. If hot surface
ignition is present, remove the
connecting screws along with
associated wiring at this time.
11. In an upward and forward motion,
lift heat exchanger from the unit.
12. Flush each heat exchanger tube
with water from a hose and blow
out with air to remove excessive
moisture. If heat exchanger is
blocked, especially with soot, and
cannot be flushed, it must be
replaced.
13. Reassemble (steps 1 through 11 in
reverse order.
• IMPORTANT: It is recommended
that at the beginning of the heating
season and approximately midway
in the heating season a visual
inspection be made of the main
burner flames and pilot flame on
standing pilot models for the desired
flame appearance by a qualified
installer, service agency, or the gas
supplier.
• IMPORTANT: It is also
recommended that at the beginning
of the heating season, the flame
sensor on hot surface ignition
models be cleaned with steel wool
by a qualified installer, service
agency, or the gas supplier.
• IMPORTANT: It is recommended
that an annual inspection and
cleaning of all furnace markings be
made to assure legibility. Attach a
replacement marking, which can be
obtained through the distributor, if
any are found to be eligible or
missing.
IMPORTANT: FOR Nox MODELS –
At the beginning of the heating season
a visual inspection of the Nox should
be made to ensure they have not
become obstructed by insects nests or
anything else which may effect
performance.
REPLACEMENT PARTS
Contact your local distributor for a
complete parts list. See enclosed
sheet.

TROUBLESHOOTING

Refer to Figures 33, 34, and 35 for
determining cause of unit problems.
WIRING DIAGRAM
Figures 36, 37 and 38 are complete
wiring diagrams for the furnace and
power sources.