Suburban NT30SP Furnace Parts Diagrams and OEM Service Guide

The Suburban NT30SP is a 30,000 BTU ducted LP-gas furnace. Use these four numbered assembly illustrations to identify the cabinet, ignition system, burner, gas manifold, motor and air-moving components in their original drawing order.

Match the drawing position to the Suburban part number, then check the furnace model and date code. Confirm any superseded number or serial-restricted component with Suburban before ordering.

Cabinet, duct adapters and power wiring

Suburban NT30SP furnace original numbered exploded view 1, cabinet, duct adapters and power wiring
NT30SP service illustration 1. Match the numbered callouts with the part references below.
Drawing reference Manufacturer part number Quantity Original service identification
1 101874 1 CABINET ASM COMPLETE
2 121662 1 FASTNER TINNERMAN USE 122060
3 062164 1 Bottom duct-adapter gasket
5 101871DG 1 Gray cabinet-front panel, NT30SP
6 050715 3 4-inch duct collar for NT30SP
7 161154 1 THERMOSTAT, WALL (WHITE)
8 520322 1 POWER SUPPLY HARNESS
NS 520323 1 520323 POWER SUPPLY CNCT USE 232699
NS 232699 1 WIRE HARNESS, INTERNAL

Electrode, chamber, ignition controls and exhaust

Suburban NT30SP furnace original numbered exploded view 2, electrode, chamber, ignition controls and exhaust
NT30SP service illustration 2. Match the numbered callouts with the part references below.
Drawing reference Manufacturer part number Quantity Original service identification
10 231933 1 ELECTRODE - Above S# 920500001
10 525029 1 SERVICE KIT, ELECTRODE - Above S# 920500001
10 230956 1 ELECTRODE 3 PRONG - Below S# 920500001
10 525019 1 SERVICE KIT, ELECTRODE - Below S# 920500001
NS 231261 1 ELECTRODE WIRE
12 030764 1 Burner access door
13 070163 1 GASKET, ELECTRODE USE 071076
18 070398 1 GASKET, BURNER ACCESS DOOR USE 071076
18 071076 1 BURNER/ELECTRODE GASKET SET USE 72103
18 072103 1 GASKET KIT, BURNER /ELECTRODE
18 525011 1 SERVICE KIT, GASKETS BURNER / ELECTRODE
NS 520797 1 GASKET KIT
19 020932BK 1 Combustion chamber assembly, NT30SP/NT34SP
21 231244 1 LIMIT SWITCH 235 DEGREE
21 525020 1 SERVICE KIT, LIMIT SWITCH 235 DEGREES
24 070362 1 BUSHING, SNAP
25 121252 2 SCREW 10 X 3/8 PH PH
26 060270 1 WIRE CLAMP
27 230714 1 SPLICER
30 230218 1 BUSHING SNAP 7/8 IN
31 063248 1 BRACKET POWER SUPPLY
33 232351 1 ON/OFF SWITCH
34 063522 1 SUPPORT BRACKET
35 520820 1 MODULE BOARD, WAS SUPERCEEDED USE 521099
35 521099 1 IGNITION CONTROL MODULE
38 070807 1 INSULATOR, MODULE BOARD
39 090301 1 PANEL, BOARD MOUNTING
42 260542 1 VENT CAP USE 260573
42 260573 1 VENT CAP
43 050906 1 SUBURBAN INTAKE TUBE 3 IN
46 121711 1 SCREW #8X3.25 PH PH 410SS
NS 2613A 1 FURNACE CORE REPLACEMENT RP-30N

LP burner, manifold and gas-valve parts

Suburban NT30SP furnace original numbered exploded view 3, lp burner, manifold and gas-valve parts
NT30SP service illustration 3. Match the numbered callouts with the part references below.
Drawing reference Manufacturer part number Quantity Original service identification
48 010701 1 NT30SP/NT34SP burner assembly
49 180214 1 NT30SP main burner orifice, No. 52 (LP gas)
50 070408 1 GASKET, MANIFOLD PIPE
52 171468 1 MANIFOLD PIPE
53 161123 1 GAS VALVE 3/8 X 1/8
54 171434 1 PIPE ASSY, GAS INLET
56 071034 1 GASKET, GAS INLET
57 171428 1 ELBOW 90
58 070534 1 GASKET DISC COVER
59 062408 1 DISC COVER, GAS INLET
60 170374 1 GAS FITTING, 90° ELBOW
60 525025 1 SERVICE KIT, FITTING BRASS 3/8 90 DEG ELBOW

Room-air blower, motor and combustion-air system

Suburban NT30SP furnace original numbered exploded view 4, room-air blower, motor and combustion-air system
NT30SP service illustration 4. Match the numbered callouts with the part references below.
Drawing reference Manufacturer part number Quantity Original service identification
61 350113 1 WHEEL, BLOWER METAL
63 390283BK 1 BLOWER HOUSING ASSY
65 230509 1 MICRO SWITCH & PADDLE USE 233356
65 233356 1 MICRO SWITCH & PADDLE
65 525024 1 SERVICE KIT, SAIL SWITCH
66 121247 2 SCREW, 2-56 X 5/8 HEX
68 121951 2 NUT #2-56
70 062138 3 BRACKET MOTOR MOUNTING
72 070385 2 GASKET CROSSOVER TUBE
73 050751 1 TUBE, CROSSOVER
75 231207 1 MOTOR ASSY USE 521137
75 521137 1 Replacement motor listed for NT30M, NT30S and NT30SP
76 070384 1 GASKET, MOTOR MOUNT
77 390179BK 1 Combustion-air housing assembly (2003 factory part 390179BK; older source omitted the BK suffix)
79 350110 1 WHEEL COMBUSTION AIR
81 070386 1 GASKET, COMBUSTION AIR
82 390424 1 HOUSING, COMBUSTION AIR (OUTSIDE)
83A 121712 1 BOLT, TINNERMAN

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