Suburban Nt Series NT20A Parts Diagram · Exploded View › Burner Assembly

Furnace · 5 assemblies · 5 diagram sheets · 125 parts · by Andrew Strick, mobile RV technician

OEM exploded parts diagrams for the Suburban Nt Series NT20A RV furnace: 5 assemblies (Exploded View › Burner Assembly, Exploded View › Combustion Chamber, Replacement, Exploded View › Cabinet Assembly, Exploded View › Blower Assembly) and 125 manufacturer part numbers. 24 parts are marked as superseded — the description gives the replacement number to order instead.

The rating plate is on the furnace chassis — slide the unit's front panel off or look just inside the exterior access door. Suburban models (SF-30F, NT-34SP …) changed burners and boards over the years, so the serial number's date range matters as much as the model.

Exploded View › Burner Assembly

Components

38 items

1. #APPLIANCE COMPONENTS RV; Knob Blk Pilot Reset MFR # 140093
2. #ROD,LIGHTER MFR # 140130
3. #Thermocouple; Use With Gas Water Heaters And Furnaces; Probe Sensor; 30 Inch Length; Copper MFR # 1153 Superseded: see description
4. #Thermocouple; Use On Water Heater Models GVR65N/ GVR65BN/ GVR50N/ GVR50BN/ GVR35N/ GVR65P/ GVR65BP/ GVR50P/ GVR50BP/ GVR35P/ GVR65-5/ GVR50-5GVR35-5GVR65-5S/ GVR50-5S/ GVR35-5S/ GVC65N/ GVC65P/ GVC50N/ GVC50P/ GVC35N/ GVC35P/ GVC65-5/ GVC50-5/ GVC35-5 MFR # 160876 Superseded: see description
5. #Universal Thermocouple; 30 Inches Long; Includes Thermocouple/ Positioning Adapters; MFR # H06E404
6. #T-COUPLE,30" USE 160876 MFR # 160527 Superseded: see description
7. #BURNER, PILOT MFR # 160535
8. #BURNER, MAIN MFR # 10563S
9. #VALVE,BASO MFR # 160705
10. #VALVE, SHUT OFF MFR # 160712
11. #VALVE USE 520402 MFR # 160650 Superseded: see description
12. #BURNER ASM MFR # 140091
13. #BURNER ASM W/AIR SHUTTER ROD MFR # 10519
14. #APPLIANCE COMPONENTS RV; Pilot Orifice MFR # 160659
15. #Furnace Pilot Regulator; For Suburban Furnaces MFR # 160556
16. #PIPE,MANIFOLD MFR # 170409
17. #BOATGUARD 21'-23' 102' CUDDY CABIN MFR # 70207
18. #NO GENERIC NAME;;Gasket Burner Tunnel (1 MFR # K6P70305
19. #PIPE, MANIFOLD 1/4 X4 1/2 " MFR # 170339
20. #ELBOW BRASS 90 DEGREE MFR # 170392
21. #3/8 Inch x 1/4 Inch HEX BUSHING MFR # 170280
22. #APPLIANCE COMPONENTS RV; St Ell MFR # 170012
23. #TUBE GAS INLET MFR # 170419
24. #TUBE,PILOT MFR # 170415
25. #NIPPLE 3/8 X 1 1/2 MFR # 170281
26. #ELBOW, UNION WITH 1 1/2 Inch NIPPLE MFR # 170292
27. #TUBING MFR # 170411
28. #ELBOW MFR # 170519
29. #ELBOW USE 170519 MFR # 170408 Superseded: see description
30. #GASKET,EXHAUST USE 70487 MFR # 70217 Superseded: see description
31. #GASKET,ROPE EXHAUST (200) MFR # 70487
32. #GASKET KIT MFR # 520227
33. #GASKET KIT *PIECE OUT KIT* MFR # 520232
34. #ARRESTOR KIT,STATIC MFR # 520049
35. #PARTS PACKAGE MFR # 210919
36. #Furnace Gasket; Furnace Motor Gasket; Fits Suburban Furnace NT20A/ NT20C/ NT20CD/ NT22C/ NT22CD/ NT30A/ NT30C/ NT30CD/ NT32C/ NT30CD/ NT45S MFR # 70165
37. #GASKET,BLOWER MOTOR HSG. MFR # 70264
38. #APPLIANCE COMPONENTS RV; Gskt Bottom Duct MFR # 70306

Exploded View › Combustion Chamber

Components

46 items

1. #WASHER - 1IN HOSE FILTER, 3/CARD, LLC MFR # 20183
2. #CHAMBER,COMBUSTION MDL# NT22A MFR # 110248
3. #CHAMBER,COMBUSTION MFR # 20184
4. #CHAMBER,COMBUSTION MFR # 110251
5. #CHAMBER,HEAT NT22 C MFR # 110249
6. #13/16'TRI-LUG WINDOW KNOB MFR # 20185
7. #SPACER, BRIDE - 14B MFR # 120732
8. #DIODE RECTIFIER MFR # 230297
9. #DIODE USE 230297 MFR # 230288 Superseded: see description
10. #APPLIANCE COMPONENTS RV; Ac/Dc Switching Relay MFR # 230255
11. #TRANSFORMER BE 8192 OR BE 8912 MFR # 230323
12. #CONVERTER/CHARGER USE DLS15 MFR # PC15 Superseded: see description
13. #Power Converter; DLS Series; Converts 108 To 132 Volt AC To 13.6 Volt DC; 200 Continuous Watts; 15 Amps Continuous Output; 80 Percent Efficiency; With Short Circuit/ Reverse Polarity/ Over Load/ Thermal Protection; 9.7 Inch Length x 6.7 Inch Width x 3.4 Inch Height; With 36 Inch Length Power Cord; Compatible With IOTA IQ4 Charge Controller MFR # DLS15
14. #CONVERTER,9 AMP USE 6712N W/O CHARGER MFR # 6509X Superseded: see description
15. #DIODE & TRANSFORMER PKG MFR # 230312
16. #THERMOSTAT RELAY MFR # 230423
17. #Furnace Limit Switch; For Suburban Furnace NT-24M/ NT-30M/ NT-34M/ NT-24S/ NT-30S/ NT-34S (Below Serial Number 1600851) MFR # 230575
18. #Furnace Limit Switch; For Suburban Furnace Models NT-24M/ NT-30M/ NT-34M/ NT-24S/ NT-30S/ NT-34S MFR # 230575MC
19. #SWITCH,FAN USE 230575 MFR # 230348 Superseded: see description
20. #SWITCH,FAN 11T-13 MFR # 230128
21. #Furnace Limit Switch; For Suburban Furnace NT-30SP/ NT-34SP/ NT-24/ NT-30/ NT-34/ NT-24M/ NT-30M/ NT-34M/ NT-24S/ NT-30S/ NT-34S/ P-30S; Also Use New Number 525020 MFR # 231244 Superseded: see description
22. #APPLIANCE COMPONENTS RV; Switch Limit MFR # 230229
23. #SWITCH,LIMIT MFR # 232578
24. #Furnace Limit Switch; For Suburban Furnace Models P-30S/ NT-34SP/ NT-24/ NT-30/ NT-34/ NT-24M/ NT-30M/ NT-34M/ NT-24S/ NT-30S/ NT-34S MFR # 230496MC
25. #Furnace Limit Switch; For Suburban Furnace P-30S/ NT-34SP/ NT-24/ NT-30/ NT-34/ NT-24M/ NT-30M/ NT-34M/ NT-24S/ NT-30S/ NT-34S MFR # 230496
26. #APPLIANCE COMPONENTS RV; Igniter Piezo W/ Wire * MFR # 520577
27. #IGNITER,PIEZO USE 230521 MFR # 230325 Superseded: see description
28. #IGNITER, PIEZO USE 520577 MFR # 230521 Superseded: see description
29. #EXTENSION KNOB MFR # 140137
30. #COVER, JUNCTION BOX MFR # 90157
31. #N/A JUNCTION BOX MFR # 90158
32. #APPLIANCE COMPONENTS RV; Knob Blk Pilot Reset MFR # 140093
33. #TS-50: 50 AMP TRANSFER SWITCH MFR # 70278
34. #COVER,HOLE AIR SHUTTER ADJU STMENT MFR # 260061
35. #ROD,RESET MFR # 140131
36. #IGNITER,PIEZO MFR # 140103
37. #ELECTRODE MFR # 230349
38. #BURNER, PILOT MFR # 160535
39. #Furnace Gasket; Furnace Burner Access Door Gasket And Electrode Gasket; Fits Suburban Furnace NT-12/ NT-16/ NT-20/ NT-12S/ NT-16S/ NT-20S/ NT-12SP/ NT-16SP/ NT-20SP/ NT-24/ NT-30/ NT-34/ NT-24M/ NT-30M/ NT-34M/ NT-24S/ NT-30S/ NT-34S/ NT-24SP/ NT-30SP/ NT-34SP/ NT-40/ P-30/ P-40; Also Use New Number 525011 MFR # 071076 Superseded: see description
40. #GASKET, PILOT BURNER USE 71076 MFR # 70163 Superseded: see description
41. #APPLIANCE COMPONENTS RV; Hole Cover MFR # 290117
42. #CAP,LIGHTER MFR # 290110
43. #RETAINER,ELECTRODE MFR # 61697
44. #GASKET,ELECTRODE MFR # 70276
45. #APPLIANCE COMPONENTS RV; Gskt Cov Obs Hole N /L/A MFR # 70367
46. #32646 BUG BUST BI-LING 32OZ MFR # 50558

Replacement

Components

2 items

1. #HEATERS & FURNACES RV; Nt-20Seq 19 000 Suburban MFR # NT20SEN
2. #HEATERS & FURNACES RV; Nt-20Sq 19 000 Suburban H MFR # NT20SN

Exploded View › Cabinet Assembly

Components

23 items

1. #PANEL, FRONT MFR # 100574
2. #FRONT, MAIN CABINET ASSEMBLY (NT-22A,30A) MFR # 100543
3. #FRONT, MAIN CABINET ASSEMBLY (NT-20AE) MFR # 100200
4. #CABINET FRONT MFR # 100742
5. #CABINET ASSEMBLY MFR # 100746
6. #CABINET ASM,OUTER MFR # 100171S
7. #CABINET, OUTER ASSEMBLY (NT-22C,CD) MFR # 100185
8. #CABINET ASM,OUTER MFR # 100733
9. #CABINET, OUTER ASSEMBLY (A MODELS) MFR # 100548
10. #CABINET, BACK MFR # 100585
11. #BACK, CABINET (NT-20E) MFR # 100583
12. #Furnace Vent; For Suburban Furnace NT-Series MFR # 260541
13. #VENT CAP USE 260541 MFR # 260126 Superseded: see description
14. #CAP,VENT USE 260126 MFR # 260090 Superseded: see description
15. #ADAPTER FOR VENT CAP MFR # 62123
16. #Water Heater Gas Valve; For Uni-Line 110 Series; 1/2 Inch Inlet x 1/2 Inch Outlet; 50 To 90 Degrees MFR # 100502
17. #T-STAT USE 100502 MFR # 66M010000 Superseded: see description
18. #T-STAT USE 100502 *N* MFR # 160850 Superseded: see description
19. #N/A DOOR LATCH (SPRING TYPE) MFR # 150033
20. #DOOR, MAIN CABINET FRONT (NT-22A,30A) MFR # 30377
21. #DOOR,MAIN CABINET MFR # 30430
22. #APPLIANCE COMPONENTS RV;;Collar Duct MFR # 50296
23. #Furnace Duct Cover Plate; Fits Suburban 4 Inch Duct MFR # 50733

Exploded View › Blower Assembly

Components

18 items

1. #HOUSING,BLOWER MFR # 390054
2. #COVER, MOTOR AIR INTAKE (NT-22E) MFR # 390047
3. #BLOWER MOTOR FITS SELECT SUBRB NT20/22/32 FURNACES MFR # PE2416Q
4. #MOTOR,BOSCH USE PE2416Q MFR # 230260 Superseded: see description
5. #WHEEL,BLOWER MFR # 350037
6. #WHEEL,BLOWER,SMALL MFR # 350036
7. #PLATE,DIVIDER MFR # 390045
8. #RING,INLET BLOWER MFR # 390027
9. #BUSHING,BLOWER MOTOR MFR # 70289
10. #MICROSWITCH COVER NT32 C MFR # 61659
11. #SWITCH,SAIL NT12F/NT12C MFR # 230447
12. #SWITCH USE 230449 MICRO & PADDLE MFR # 230006 Superseded: see description
13. #SWITCH,SAIL USE 230447 MFR # 230449 Superseded: see description
14. #4X4 RIDE RITE F250/350 05 MFR # 2400
15. #BOATGUARD 19'-21 102' 'VHULL RUNABO MFR # 70206
16. #TUBE,CROSSOVER USE 2400 2.5 X 1.75 MFR # 50A Superseded: see description
17. #TUBE,CROSSOVER USE 50A 1 3/4" X 2 1/2" MFR # 50588 Superseded: see description
18. #Furnace Vacuum Cup; For Suburban NT-Series Furnace; Rubber MFR # 290079