Cleaning Of Heat Exchanger - Maytag iQ Drive R6GI Installation Instructions Manual

CAUTION:
Use care when removing parts from this unit.
Personal injury can result from sharp metal
edges present in all equipment of sheet metal
construction.
Proper maintenance is important to achieve optimum
performance from the system. The ability to properly
perform maintenance on this equipment requires certain
mechanical skills and tools. If you do not possess these
skills, contact your dealer for maintenance. Consult your
local dealer about the availability of maintenance contracts.
Routine maintenance should include the following:
CAUTION:
The unit should never be operated without a
filter in the return air system. Replace disposable
filters with the same type and size.
• Inspect, clean or replace air filters at the beginning of
each heating and cooling season, or more frequently
if required.
• Inspect the condensate drain and outdoor coil at the
beginning of each cooling season. Remove any debris.
Clean the outdoor coil and louvers as necessary using
a mild detergent and water. Rinse thoroughly with water.
• Inspect the electrical connections for tightness at the
beginning of each heating and cooling season.
• The blower compartment should be cleaned monthly
during the heating and cooling seasons to remove
any dirt and lint that may have accumulated in the
compartment or on the blower and motor. Buildup
of dirt and lint on the blower and motor can create
excessive loads on the motor resulting in higher than
normal operating temperatures and possible shortened
service life.
• Maintain heat exchanger and burners. The unit should
operate for many years without excessive scale buildup
in the heat exchanger, however, the heat exchanger,
the vent system, and the burners should be inspected
and cleaned (if required) by a qualified serviceman
annually to ensure continued safe operation. Particular
attention must be given to identify deterioration from
corrosion or other sources.
• 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 29) for gas valve shut
off instructions.
5. Disconnect the wires from the gas valve, ignitor, flame
sensor, combustion air motor, flame 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. Carefully remove the four screws inside the burner
box (2 at each end), securing the complete burner
box assembly to the heat exchanger panel as shown
in Figure 8. bE EXTREMELY CAREFUL NOT TO
DAMAGE THE IGNITOR WHILE REMOVING THE
bURNER ASSEMbLY.
NOTE: The burner box may have hooks near the top
on both ends. To remove this type of burner box, lift
the burner box upwards and then remove the box from
the unit.
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