Exploded view of the SFC 99, SFC 125 models

Item Number Description Part Number Replacement Kit Numbers
10 Manual air vent 180-227 P-808
20 Combustion air intake fitting and screen 180-203 P-809
30 Flue exhaust fitting 180-204 P-810
40 Ignition module 180-202 P-811
50 Boiler supply water pipe 180-233 P-812
60 Fitting supply tube 180-234
Fitting UNF 7/8"x 22mm 180-235
Nut spring clamp 22mm 180-236
Spring clamp 22mm 180-237
*O-ring 22.3x2.4 EPDM70 180-238
70 *Supply water pipe gasket 250-635
80 Rear flue duct 180-239 P-813
Flue / Heat exchanger gasket 150-312
Flue pipe outlet gasket 150-313
90 Flue gas temperature sensor 180-205 P-814
*NTC shaft ⅛" SW15 150-314
100 Ignitor and cable 180-201 P-815
110 *Ignitor gasket 250-622
120 Burner 180-199 P-816
130 *Burner gasket 180-200
Screws x 4 150-344
Spring 150-241
O-ring 150-343
140 Backflow valve 180-232 P-817
*Backflow valve flapper (viton) 180-184
150 *Fan gasket 180-226 P-818
160 Fan 240-114  
170 Front panel assembly 99/125 180-262 P-819
180 Venturi insert SFC 99 # 528 180-132 P-820
Venturi insert SFC 125 # 500 180-133 P-821
190 Gas line (gas valve to fan) 180-210 P-822
Gas line O-ring 150-245  
200 Boiler pump, SFC 180-130 P-823
*Pump gasket x 2    
210 Gas valve 180-215 P-824
  Inlet gasket 180-219  
Outlet O-ring 150-175  
220 Inlet gasket 180-219 P-825
230 Inlet gas tube 180-218  
240 *O-ring & orifice 150-175 all conversion kits -see 250 below
250 Orifice - Natural Gas SFC 99 - #392 180-216 P-805
Orifice - Natural Gas SFC 125 - #450 180-228 P-807
Orifice- Propane SFC 99 - #315 180-217 P-804
Orifice- Propane SFC 125 - #370 180-229 P-806
Alternative low calorfic Natural Gas Orifice - SFC 99 - #426 180-265 P-839
Alternative low calorfic Natural Gas Orifice - SFC 125 - #490 180-266 P-840
260 Supply pipe (cold) 180-240 P-826
  DHW flow sensor housing + propellor 180-241
270 DHW Flow Sensor 180-220 P-827
280 DHW supply pipe 180-242 P-828
290 DHW temperature sensor 180-207 P-829
300 Heat exchanger refractory plate with harness 180-208 P-830
310 Heat exchanger 180-146 P-831
*Heat exchanger gasket 255-073
320 Supply temperature sensor heat exchanger 180-206 P-832
330 Sight glass 250-626 P-730
340 Condensate trap 180-224 P-833
350 Boiler pressure sensor 180-221 P-834
360 Boiler supply water temperature sensor 180-222 P-835
370 Control unit 180-223 P-836
380 Boiler mounting bracket 250-809 P-837
* Gasket package for SFC-99/125; includes all gaskets asterisked above   P-838