Bryant 330JAV, 331JAV instruction manual Positionof Ignitor to Burner, CleaningHeat Exchanger Cell

1.Turn gas and power to furnace to OFF.

2.Remove control and blower access doors.

3.Disconnect vent connector from furnace flue collar.

4.Disconnect internal vent pipe and enclosure on downflow furnaces only.

a.Remove vent pipe enclosure cover.

b.Disconnect and remove short piece of vent pipe from within furnace.

NOTE: Vent pipe is SCREWED and RTV sealed to relief box.

	c. Remove vent pipe enclosure by removing screw in upper
	back. Push bottom side backward to release tabs.
5.	Remove 2 screws that secure relief box. (See Fig. 5 or 6.)
6.	Disconnect wires to the following components. Mark wires
	to aid in reconnection of:
	a. Draft safeguard switch.
	b. Inducer motor.
	c. Pressure switch(es).

13 32"

BURNER

11 32"

CELL

PANEL

HOT SURFACE IGNITOR ASSEMBLY

	d. Limit overtemperature switch(es).
	e. Gas valve.
	f. Hot surface ignitor.
	g. Flame-sensing electrode.
	h. Flame rollout switch(es), if applicable.
7.	Remove complete inducer assembly and relief box from
	furnace.
8.	Remove screws that secure flue collector box to center
	panel. Be careful not to damage collector box.
9.	Remove cell outlet plates.

IMPORTANT: Replace screws in center panel before cleaning.

10. Remove burner assembly and cell inlet plates.

IMPORTANT: Replace screws in center panel before cleaning.

NOTE: Be very careful when removing burner assembly to avoid breaking ignitor. See Fig. 7 for correct ignitor location.

11.Using field-provided small wire brush, steel spring cable, reversible electric drill, and vacuum cleaner, clean cells as follows:

a.Assemble wire brush and steel spring cable.

(1.) Use 48 in. of 1/4-in. diameter high-grade steel spring cable (commonly known as drain clean-out or Roto-Rooter® cable).

(2.) Use 1/4-in. diameter wire brush (commonly known as 25-caliber rifle cleaning brush).

NOTE: The materials needed in items (1.) and (2.) can usually be purchased at local hardware stores.

(3.) Insert twisted wire end of brush into end of spring cable, and crimp tight with crimping tool or strike with ball-peen hammer. TIGHTNESS IS VERY IMPORTANT.

(4.) Remove metal screw fitting from wire brush to allow insertion into cable.

b.Clean each heat exchanger cell.

(1.) Attach variable-speed, reversible drill to end of spring cable (end opposite brush).

(2.) Insert brush end of cable into upper opening of cell and slowly rotate with drill. DO NOT force cable. Gradually insert at least 36 in. of cable into 2 upper passes of cell. (See Fig. 8.)

—5—

C IGNITOR

L

7 8"

C BURNER

L

IGNITOR

ASSEMBLY

A93347

Fig. 7—Position of Ignitor to Burner

A91252

Fig. 8—Cleaning Heat Exchanger Cell

(3.) Work cable in and out of cell 3 or 4 times to obtain sufficient cleaning. DO NOT pull cable with great force. Reverse drill and gradually work cable out.

(4.) Insert brush end of cable in lower opening of cell, and proceed to clean 2 lower passes of cell in same manner as 2 upper passes.

(5.) Repeat foregoing procedures until each cell in furnace has been cleaned.

(6.) Using vacuum cleaner, remove residue from each cell.

(7.) Using vacuum cleaner with soft brush attachment, clean burner assembly.

(8.) Reinstall cell outlet plates and screws FIRST; then, reinstall cell inlet plates and burner assembly. Care must be exercised to center burners in cell openings.

12.Remove old sealant from center panel and collector box flange and apply new sealant to collector box flange and reinstall on center panel, making sure all screws are secure.