Carrier 320720---751 THRU ---761 Installation, Kit Usage, Remove Whole Cell Panel Assembly

320720

Table 1 – Kit Usage

UNIT

		340AAV			352AAV		355AAV	58MCA
		340MAV										58MEC		58MVB
								58MCB
KIT PART		350AAV	345MAV	351DAS	352MAV	355MAV	355BAV			58MSA						58MVP		PG9MAA
								58MEB				58MTA		58UVB
NO.		350MAV			353BAV		355CAV											PG9MAB
								58MXA				58MTB		58MVC
		353AAV			PG9MXA		PG9UAA
								58MXB
		490AAV
320720---	751	24040	24040		--- ---	--- ---	--- ---	040	--- 08	040	--- 08	--- ---		--- ---		--- ---		24040
		36040	36040	--- ---				040	--- 12	040	--- 12							36040
		24060	24060					060	--- 08	060	--- 08							24060
320720---	753	36060	36060	--- ---	36060	42060	42060	060	--- 12	060	--- 12	060---	12	060---	14	060---	14	36060
		48060	48060					060	--- 16	060	--- 16							48060
320720---	754	36080	36080	36080	36080			080	--- 12	080	--- 12	080	12					36080
Prior to S/N							--- ---							--- ---		--- ---
		48080	48080	48080	48080	--- ---		080	--- 16	080	--- 16	080	16					48080
3002A14578
						42080										080---	14
			--- ---	--- ---	--- ---		--- ---		--- ---		--- ---	--- ---		--- ---		(Series
320720---	755	--- ---				(Series A)												--- ---
																100)
320720---	756	48100	48100		48100	60100	60100	100	--- 16	100	--- 16	100---	16	100	20	100	20	48100
		60100	60100	--- ---	60100			100	--- 20	100	--- 20	100	20					60100
320720---	757	60120	60120		60120	60120	60120	120	--- 20	120	--- 20	120	20	120	20	120	20	60120
		60140		--- ---				140	--- 20									60140
320720---	758	--- ---	--- ---	--- ---	--- ---	42040	42040		--- ---		--- ---	--- ---		040---	14	040---	14	--- ---
						42080										080---	14
																(Series
320720---	760	60080	60080	60080		(Series B	42080	080	--- 20	080	--- 20			080	14			60080
																110 and
					--- ---	and later)						--- ---
							60080							080	20	later)
						60080
																080	20
320720---	761	36080	36080	36080	36080			080	--- 12	080	--- 12	080	12					36080
After S/N							--- ---							--- ---		--- ---
		48080	48080	48080	48080	--- ---		080	--- 16	080	--- 16	080	16					48080
3002A14577

INSTALLATION

Remove Whole Cell Panel Assembly

See Fig. 1 and Fig. 2 for furnace component locations. See Fig. 3 for expanded view of heating system components.

NOTE: Actual component locations may vary depending on model and series.

1.Turn off gas and electrical supplies to furnace.

2.Remove main furnace door.

3.Remove blower access panel.

4.Disconnect field power supply wires from J-box.

5.Remove two screws securing J-box.

6.Remove two screws securing top filler panel and rotate panel upwards to remove or allow the heat exchanger to be removed from front of furnace.

7.Disconnect combustion-air intake pipe from intake hous- ing and move pipe out of furnace casing.

8.Disconnect gas supply pipe from gas valve using backup wrench.

9.Disconnect vent pipe from inducer housing by loosening coupling clamp on inducer outlet. If coupling has 2 clamps, loosen clamp on vent pipe side. Move pipe out of furnace casing.

10.If control center is located in burner compartment of fur- nace, remove blower motor leads, transformer wires, door switch wires, and auxiliary limit switch wires (if present) from control center and pull wires through blower shelf.

11.If control center is located in blower compartment of fur- nace, disconnect wires from flame sensor, hot surface ig- niter, overtemperature switch, gas valve, pressure switch(es), inducer motor, limit switch, and J-box, then pull wires through blower shelf.

12.Remove two screws securing blower to blower shelf (four screws on 120 and 140 sizes).

13.Remove two screws next to blower mounting screws that secure blower shelf to cell panel.

14.Remove three screws from each side of cell panel.

15.If control center is located in burner compartment of fur- nace, remove control center by removing screw and press- ing tabs inward.

16.If control center was removed from furnace casing, secure control center (and J-box) to manifold for removal pur- poses only.

17.Disconnect field drain connection from condensate trap.

18.Disconnect drain and relief port tube from condensate trap.

19.Remove condensate trap from furnace casing or blower shelf.

20.Remove whole cell panel assembly with heat exchanger, burner box, inducer assembly, J-box (if applicable), and control center (if applicable) attached through front of fur- nace.

!CAUTION

PERSONAL INJURY HAZARD

Failure to follow this caution may result in personal injury.

Whole cell panel assembly is heavy. Get help to remove and lift assembly.

Remove Burner Box Assembly

1.If not previously disconnected, disconnect wires or con- nectors to overtemperature switch, gas valve, igniter, and flame sensor.

2.Remove pressure switch tube from intake housing.

3.Remove two screws attaching intake housing to burner box, and rotate intake housing away from burner box for removal.

4.Disconnect pressure tubing from gas valve.

5.Remove screws attaching burner box to cell panel.

NOTE: Burner box cover, manifold, gas valve, and burner assembly should be removed as one assembly.

2