Reznor R6GD Unit Installation Manual - Manual (Page 22)

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• The motors for the circulating air blower, outdoor fan,
and combustion blower are pre-lubricated at the factory.
No further oiling is required for the life of this product.
• Inspect and clean the screen of the vent cover assembly
at the beginning of each heating and cooling season.
Cleaning of Heat Exchanger
WARNING:
Holes in the heat exchanger can cause products
of combustion to enter the home. Replace the heat
exchanger if leaks are found. Failure to prevent
products of combustion from being circulated
into the living space can create potentially
hazardous conditions including carbon monoxide
poisoning that could result in personal injury or
death.
If the heat exchanger must be cleaned due to soot or
scale build up, follow the steps below.
1. Shut off the gas supply to the unit at the meter or at
the manual valve in the gas supply piping.
2. Turn off all power to the unit and set the thermostat to
the lowest temperature setting.
3. Remove the louvered access panel from the unit.
4. Turn the gas control knob (gas valve) to the OFF
position. See Figure 11 (page 27) for gas valve shut
off instructions.
5. Disconnect the wires from the gas valve, ignitor, fl ame
sensor, combustion air motor, fl ame roll-out control,
over-temperature limit switch, and pressure switch.
6. Remove the silicone rubber tube from the collector
pan to the pressure switch.
7. Remove 4 nuts securing the combustion blower to the
collector pan. Remove the combustion blower.
8. Remove all screws securing the collector pan to the
unit. Remove the collector pan from the unit.
CAUTION:
To prevent damage to the unit or internal
components, it is recommended that two
wrenches be used when loosening or tightening
nuts. Do not over tighten!
9. Using 2 wrenches, separate the ground-joint union in
the gas supply piping at the unit.
10. Remove the piping between the gas valve and the
ground-joint union, if necessary.
11. Remove the screws that secure the burner assembly
in place and the burner assembly. BE EXTREMELY
CAREFUL NOT TO DAMAGE THE IGNITOR WHILE
REMOVING THE BURNER ASSEMBLY.
12. Attach a round wire brush to a length of high grade
stainless steel cable, such as drain clean-out cable.
Attach the other end of the spring cable to a variable
speed reversible drill. Slowly insert and rotate the cable
into the top portion of the heat exchanger. Operate the
drill alternating between forward and reverse, working
the cable in and out several times to obtain suffi cient
cleaning. Repeat this process at each exchanger tube.
13. Remove all loosened debris from the heat exchanger
tubes using high pressure air and vacuum cleaner.
14. Using a light, check the condition of the upper and
lower sections of the heat exchanger tube.
15. Inspect the burners and if necessary, clean them
carefully with a soft wire brush and/or the nozzle of a
vacuum cleaner. DO NOT DAMAGE THE IGNITOR OR
FLAME SENSOR WHILE CLEANING THE BURNER.
16. Replace all the parts in reverse order from which they
were removed.
17. Follow the operating instructions found on the right
side door and the User’s Information Manual to return
the unit to operation.
Cleaning of Burners
If the burners must be cleaned, follow the steps below.
1. Shut off the gas supply to the unit either at the meter
or at a manual valve in the supply piping.
2. Turn off all power to the unit and set the thermostat to
the lowest temperature setting.
3. Remove the louvered control access panel from the
unit.
4. Turn the gas control knob to the OFF position. See
Figure 11 for gas valve shut off instructions.
5. Disconnect the wires from the gas valve, ignitor, and
fl ame sensor.
CAUTION:
To prevent damage to the unit or internal
components, it is recommended that two
wrenches be used when loosening or tightening
nuts. Do not over tighten!
6. Using two wrenches, separate the ground-joint union
in the gas supply piping at the unit.
7. Remove the piping between the gas valve and the
ground-joint union (if applicable).
8. Remove all screws securing the burner assembly to
the furnace.
9. Carefully remove the burner assembly from the furnace.
DO NOT DAMAGE THE IGNITER WHILE REMOVING
THE BURNER ASSEMBLY.
10. Inspect the burners for accumulated dust or debris.
If necessary carefully clean them with a soft wire
brush and a vacuum cleaner. DO NOT DAMAGE THE
IGNITER WHILE CLEANING THE BURNER.
11. Replace all the parts in reverse order from which they
were removed.
12. Follow the lighting instructions found on the lower unit
door to return the unit to operation.
13. Verify proper operation after servicing.