Bryant 577D----A Inducer Pressure Switch, Outdoor Fan, Electrical Controls and Wiring

8.Partially slide the burner rack out of the unit (see Fig. 25 and 26). Remove ignitor and sensor wires at the burner as- sembly. Remove wires to rollout switch.

9.Slide the burner rack out of the unit (See Fig. 25 and 26).

10.To reinstall, reverse the procedure outlined above.

-- -- A
577D		Blower	Control
			Access
	Compressor	Access	Panel
		Panel
	Access Panel

A09479

Fig. 24 - Unit Access Panels

					Integrated
					Gas Unit
					Controller
					(IGC)
					Auto Transformer
					fuses used on 460
					volt units only.
					(Hidden)
					Interface Fan
					Board (IFB)
					Induced Draft
					Motor
Fan Partition	Flue				Rollout
Mounting	Collector	Inducer
			Burner	Mounting	Switch
Bracket	Box
		Blower	Rack
				Screw
		Housing

A09480

Fig. 25 - Blower Housing and Flue Collector Box

A07680

Fig. 26 - Burner Rack Removed

Inducer Pressure Switch

Inspect pressure switch connections. Inspect pressure switch tube for cracks or restrictions. Replace if needed.

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Disconnect and install lockout tag on electrical power to the unit before cleaning and lubricating the blower motor and wheel.

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 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.

Outdoor Fan

!CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution may result in damage to unit components.

Keep the outdoor fan free from all obstructions to ensure proper cooling operation. Never place articles on top of the unit.

1.Remove 4 screws holding outdoor grille and motor to top cover.

2.Turn motor/grille assembly upside down on top cover to expose fan blade.

3.Inspect the fan blades for cracks or bends.

4.If fan needs to be removed, loosen setscrew and slide fan off motor shaft.

5.When replacing fan blade, position blade according to the table shown in Fig. 27.

6.Ensure that set screw engages the flat area on the motor shaft when tightening.

7.Replace grille.

Electrical Controls and Wiring

Inspect and check the electrical controls and wiring annually. Be sure to turn off the electrical power to the unit.

Remove access panel to locate all the electrical controls and wiring. Check all electrical connections for tightness. Tighten all screw connections. If any smoky or burned connections are noticed, disassemble the connection, clean all the parts, re-strip the wire end and reassemble the connection properly and securely.

32