Suburban Nt Series NT20CDS Parts Diagram · Replacement

Furnace · 5 assemblies · 5 diagram sheets · 67 parts · by Andrew Strick, mobile RV technician

OEM exploded parts diagrams for the Suburban Nt Series NT20CDS RV furnace: 5 assemblies (Replacement, Exploded View › Combustion Chamber, Exploded View › Burner Assembly, Exploded View › Cabinet & Vent Assembly, Exploded View › Blower Assembly) and 67 manufacturer part numbers. 15 parts are marked as superseded — the description gives the replacement number to order instead.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.

Replacement

Components

2 items

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

Exploded View › Combustion Chamber

Components

25 items

1. #13/16'TRI-LUG WINDOW KNOB MFR # 20185
2. #DIODE USE 230297 MFR # 230288 Superseded: see description
3. #DIODE RECTIFIER MFR # 230297
4. #APPLIANCE COMPONENTS RV; Ac/Dc Switching Relay MFR # 230255
5. #CONVERTER/CHARGER USE DLS15 MFR # PC15 Superseded: see description
6. #CONVERTER,9 AMP USE 6712N W/O CHARGER MFR # 6509X Superseded: see description
7. #TRANSFORMER BE 8192 OR BE 8912 MFR # 230323
8. #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
9. #THERMOSTAT RELAY MFR # 230423
10. #SWITCH,FAN 11T-13 MFR # 230128
11. #APPLIANCE COMPONENTS RV; Switch Limit MFR # 230124
12. #IGNITER,PIEZO MFR # 140103
13. #TS-50: 50 AMP TRANSFER SWITCH MFR # 70278
14. #COVER,HOLE AIR SHUTTER ADJU STMENT MFR # 260061
15. #CONTROL ROD (RESET BUTTON) MFR # 140095
16. #ELECTRODE MFR # 230349
17. #Thermocouple; Use With Gas Water Heaters And Furnaces; Probe Sensor; 30 Inch Length; Copper MFR # 1153 Superseded: see description
18. #Universal Thermocouple; 30 Inches Long; Includes Thermocouple/ Positioning Adapters; MFR # H06E404
19. #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
20. #T-COUPLE,30" USE 160876 MFR # 160527 Superseded: see description
21. #CAP,LIGHTER MFR # 290110
22. #HOUSING,BLOWER MFR # 390054
23. #32646 BUG BUST BI-LING 32OZ MFR # 50558
24. #BURNER, PILOT MFR # 160535
25. #APPLIANCE COMPONENTS RV; Knob Blk Pilot Reset MFR # 140093

Exploded View › Burner Assembly

Components

26 items

1. #APPLIANCE COMPONENTS RV; St Ell MFR # 170012
2. #BURNER,MAIN NT20 MFR # 10523
3. #APPLIANCE COMPONENTS RV; Valve Safety Pilot Ts11- MFR # 160540
4. #VALVE USE 520402 MFR # 160650 Superseded: see description
5. #BURNER ASM MFR # 140091
6. #APPLIANCE COMPONENTS RV; Suburban Orifice MFR # 180188
7. #Furnace Pilot Regulator; For Suburban Furnaces MFR # 160556
8. #PIPE, MANIFOLD 1/4 X4 1/2 " MFR # 170339
9. #3/8 Inch x 1/4 Inch HEX BUSHING MFR # 170280
10. #NIPPLE 3/8 X 1 1/2 MFR # 170281
11. #PIPE, BLACK IRON (NT-22 & 30 C,CD) MFR # 170341
12. #ELBOW, UNION WITH 1 1/2 Inch NIPPLE MFR # 170292
13. #SHUT OFF VALVE MFR # 160554
14. #APPLIANCE COMPONENTS RV; Pilot Orifice MFR # 160659
15. #NO GENERIC NAME;;T-Stat Heat & Cool ***Us MFR # A22115435
16. #T-STAT USE 100502 MFR # 66M010000 Superseded: see description
17. #BOATGUARD 21'-23' 102' CUDDY CABIN MFR # 70207
18. #T-STAT USE 100502 *N* MFR # 160850 Superseded: see description
19. #T-STAT MFR # 160616
20. #BULL DOG CATCH MFR # 70305
21. #ARRESTOR KIT,STATIC MFR # 520049
22. #T-STAT USE 3100240039 MFR # 230251 Superseded: see description
23. #T-STAT USE A22115435 MFR # 313620001 Superseded: see description
24. #Water Heater Gas Valve; For Uni-Line 110 Series; 1/2 Inch Inlet x 1/2 Inch Outlet; 50 To 90 Degrees MFR # 100502
25. #GASKET KIT MFR # 520227
26. #T-STAT USE 313620001 MFR # 3100240039 Superseded: see description

Exploded View › Cabinet & Vent Assembly

Components

1 item

1. #Furnace Duct Cover Plate; Fits Suburban 4 Inch Duct MFR # 50733

Exploded View › Blower Assembly

Components

13 items

1. #HOUSING, BLOWER MFR # 390099
2. #COVER, MOTOR AIR INTAKE (NT-20 ALL MODELS) MFR # 390058
3. #MOTOR MFR # 230186
4. #WHEEL,BLOWER MFR # 350037
5. #WHEEL,BLOWER,SMALL MFR # 350036
6. #PLATE,DIVIDER MFR # 390045
7. #RING,INLET BLOWER MFR # 390027
8. #BUSHING,BLOWER MOTOR MFR # 70289
9. #SWITCH,SAIL USE 230447 MFR # 230449 Superseded: see description
10. #SWITCH,SAIL NT12F/NT12C MFR # 230447
11. #TUBE,CROSSOVER USE 50A 1 3/4" X 2 1/2" MFR # 50588 Superseded: see description
12. #4X4 RIDE RITE F250/350 05 MFR # 2400
13. #TUBE,CROSSOVER USE 2400 2.5 X 1.75 MFR # 50A Superseded: see description