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PY5G--B: Installation Instructions
season. For the first heating season, inspect blower wheel bimonthly to
determine proper cleaning frequency.
To inspect blower wheel, remove draft hood assembly. Shine a flashlight
into opening to inspect wheel. If cleaning is required, remove
induced-draft blower assembly as follows:
1. Remove control access panel (See
2. Remove the 5 screws that attach induced-draft blower assembly to
the flue collector box cover.
3. Slide the assembly out of the unit. (See
wheel. If additional cleaning is required, continue with Steps 4 and
5.
4. To remove blower wheel, remove 2 setscrews.
5. To remove inducer motor, remove screws that hold the inducer
motor to the blower housing.
6. To reinstall, reverse the procedure outlined above.
Flue Gas Passageways
To inspect the flue collector box and upper areas of the heat exchanger:
1. Remove the induced draft blower assembly according to directions
in the Induced Draft Blower Assembly section.
2. Remove the 11 screws holding the flue collector box cover (See
Fig.
24) to the heat exchanger assembly. Inspect the heat
exchangers.
3. Clean all surfaces, as required, using a wire brush.
Limit Switch
Remove blower access panel (see
fan partition.
Burner Ignition
Unit is equipped with a direct spark ignition 100 percent lockout system.
Ignition module (IGC) is located in the control box (See
Module contains a self-diagnostic LED. During servicing, refer to label
diagram or
Table 8
in these instructions for LED interpretation.
If lockout occurs, unit may be reset by either momentarily interrupting
power supply to unit or by turning selector switch to OFF position at the
thermostat.
Main Burners
At the beginning of each heating season, inspect for deterioration or
blockage due to corrosion or other causes. Observe the main burner
flames and adjust, if necessary.
Removal of Gas Train
To remove the gas train for servicing:
1. Shut off main gas valve.
2. Shut off power to unit and install lockout tag.
3. Remove control access panel (See
4. Disconnect gas piping at unit gas valve.
5. Remove fan partition mounting bracket (2 screws located on the left
side of control compartment on the fan partition panel). Slide
bracket forward, bottom first, to remove. (See
6. Remove wires connected to gas valve. Mark each wire.
7. Remove the mounting screw that attaches the burner rack to the unit
base (See
Fig.
24).
8. Partially slide the burner rack out of the unit (see
Fig.
27). Remove ignitor and sensor wires at the burner assembly.
Remove wires to rollout switch.
9. Slide the burner rack out of the unit (See
10. To reinstall, reverse the procedure outlined above.
11. Check all connections for leaks.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig.
25).
Fig.
27). Clean the blower
Fig.
25). Limit switch is located on the
Fig.
Fig.
25).
Fig.
24.)
Fig. 24
Fig. 24
and
Fig.
27).
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal injury, death or
property damage.
Do not purge gas supply into the combustion chamber. Do not use a
match or other open flame to check for gas leaks.
Use a commercially available soap solution made specifically for the
detection of leaks to check all connections. A fire or explosion may
result causing property damage, personal injury or loss of life.
Outdoor Coil, Indoor Coil, and Condensate Drain
Pan
Inspect the condenser coil, evaporator coil, and condensate drain pan at
least once each year.
The coils are easily cleaned when dry; therefore, inspect and clean the
coils either before or after each cooling season. Remove all obstructions,
including weeds and shrubs, that interfere with the airflow through the
condenser coil.
Straighten bent fins with a fin comb. If coated with dirt or lint, clean the
coils with a vacuum cleaner, using the soft brush attachment. Be careful
not to bend the fins. If coated with oil or grease, clean the coils with a
mild detergent and water solution. Rinse coils with clear water, using a
garden hose. Be careful not to splash water on motors, insulation, wiring,
or air filter(s). For best results, spray condenser coil fins from inside to
outside the unit. On units with an outer and inner condenser coil, be sure
to clean between the coils. Be sure to flush all dirt and debris from the
unit base.
Inspect the drain pan and condensate drain line when inspecting the
coils. Clean the drain pan and condensate drain by removing all foreign
22).
matter from the pan. Flush the pan and drain trough with clear water. Do
not splash water on the insulation, motor, wiring, or air filter(s). If the
drain trough is restricted, clear it with a "plumbers snake" or similar
probe device.
Fan Partition
Flue
Mounting
Collector
Bracket
Box
Fig. 24 – Blower Housing and Flue Collector Box
and
39
WARNING
!
Rollout
Inducer
Switch
Burner
Mounting
Blower
Rack
Screw
Housing
Integrated
Gas Unit
Controller
(IGC)
Auto Transformer
fuses used on 460
volt units only.
(Hidden)
Interface Fan
Board (IFB)
Induced Draft
Motor
A12019
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