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Technical Training Department
Ashland City, Tennessee
SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
©2003
Item 250(A) 275(A) 310(A) 366(A) 400(A)
Blower Assembly:
3 Blower ....................................... 194408........ 194408 ......... 194408........ 194408 .......194408
4 Outlet Assembly, Exhaust.................. 194424........ 194424 ......... 194424........ 194424 .......194424
6 Burner, Orifice Bracket, Main ..............98044 .......... 98044 ...........98044 .......... 98044 ......... 98044
7 Burner Orifice, Main (N) SBN .......... 76243-30 .....76243-33...... 76243-31 .....76243-30 .... 76243-29
8 Burner Assembly, Main SBN ............. 194648........ 194648 ......... 194648........ 194648 .......194648
9 Burner w/Igniter Bracket, Main SBN ..194383........ 194383 .........194383 ........ 194383 ....... 194383
11 Gasket, Cleanout ............................... 99038.......... 99038 ...........99038 .......... 99038 ......... 99038
14 Control, Ignition Assembly ................194392........ 194392 .........194392 ........ 194392 ....... 194392
17 Cover, Control Box.............................194395 ........ 194395 .........194395........ 194395 .......194395
18 Cover, Inner SBN ............................ 194388-4 .....194388-4...... 194388-4 ...... 194388 .......194388
19 Cover, Jacket .....................................194389........ 194389 .........194389........ 194389 .......194389
*22 Igniter, Flame Sensor........................194405........ 194405 .........194405 ........ 194405 ....... 194405
23 Insulation, Top................................... 194439........ 194439 ......... 194439........ 194439 .......194439
*39 Manual, Instruction SBN ................... 194403........ 194403 .........194403........ 194403 .......194403
40 Plate, Mounting .................................193243 ........ 193243 ......... 193243........ 193243 .......193243
41 Probe/ECO, Upper Thermostat ........194396........ 194396 .........194396 ........ 194396 ....... 194396
42 Probe/Lower Thermostat ..................194397........ 194397 .........194397 ........ 194397 ....... 194397
43 Rod, Anode .................................... 180618-42 ...180618-42.... 180618-42 ...180618-42.. 180618-42
44 Switch, Blower Prover SBN ............. 194411-3 .....194411-8...... 194411-2 ...... 194411....... 19441-3
45 Switch, Low Gas Pressure ............. 191149-5 ..... 191149-5...... 191149-5 .....191149-5.... 191149-5
46 Switch, Off/On ....................................193243........ 193243 .........193243 ........ 193243 ....... 193243
47 Thermostat, Digital ........................... 194393........ 194393 ......... 194393........ 194393 .......194393
48 Tube, Inlet ..................................... 192626-1 .....192626-1...... 192626-1 .....192626-1 .... 192626-1
51 Valve Gas - Natural SBN ................. 194536-1 .....194536-1........ 194536........ 194536 .......194536
52 Valve, T&P .......................................192467........ 192467 .........192467 ........ 192467 ....... 192467
*53 Wire Harness - Control Natural ........194545........ 194545 .........194545 ........ 194545 .......194545
Wire Harness - Control Propane ...... 194399........ 194399 .........194399 ........ 194399 .......194399
*54 Wire Harness - Power ...................... 194398........ 194398 ......... 194398........ 194398 .......194398
*Items not illustrated.
Part numbers underlined are recommended stock items for emergency replacement.
Request from Parts Department by giving all information
such as model and series number, type of gas and specifications.
Model Orifice Drill Size
120 37
154 42
180 37
250 32
275 38
310 36
366 32
390 31
High Altitude Main Burner Orifice
Table (NEO)