BRYANT Gas Heat Rooftop Package 581JT20M

Turn the key switch to the RESET/TEST position for seven seconds

Verify that the test/reset station’s Alarm LED turns on

Reset the sensor by turning the key switch to the RESET/TEST position for two seconds

Verify that the test/reset station’s Alarm LED turns off

Shut off the gas using the manual shutoff switch located in the gas supply line

Turn the gas valve ON/OFF knob to the OFF position

Shut off power to the unit and install a lockout tag

Disconnect the gas piping at the unit gas valve

Remove the wires connected to the gas valve

Mark each wire to assist in reconnecting power to the gas valve

Remove the igniter wires and sensor wires at the Integrated Gas Unit Controller (IGC)

Remove the 2 screws that attach the burner rack to the vestibule plate

Slide the burner tray out of the unit

Shut off all electrical power supply to the unit and install a lockout tag.

Close the manual gas shutoff valve located on the gas supply line.

Remove the manifold pressure tap plug from the manifold and connect a pressure gauge or manometer.

Open the manual shutoff valve, then turn on the unit main gas valve.

Set the room thermostat to call for heat.

Air Filters and Screens Inspection

Check the presence of the following filters and screens

Are all filters and screens in place?

Access the return air filters through the lift-out panel above the evaporator/return air access panel.

Are the return air filters disposable fiberglass media type?

Inspect the condition of the return air filters.

Do the return air filters need replacement or cleaning?

Remove the burner rack from the unit as described in the Removal and Replacement of Gas Train section.

Inspect the burners for dirt and remove them from the rack if necessary.

Mark each burner to identify its position before removing from the rack.

Use a soft brush to clean the burners and cross-over port as required.

Adjust the spark gap to 0.12 – 0.14 inches (3.06 – 3.60 mm).

Ensure the spark gap is spaced 0.18 inches (4.60 mm) from the end of the burner.

Check if the factory orifice has been removed.

Ensure each orifice is tight at its threads into the manifold pipe and the orifice projection does not exceed the maximum valve.