PRODIGY 21
Gas-fired • Direct Vent • Cast-iron • Hot water boilers
®
BOILER REPLACEMENT PARTS LIST
For Models KC-50 and KC-100
When ordering replacement parts, specify the boiler model number, serial number and gas by name (natural or
propane). Parts are available from your local Slant/Fin heating contractor, wholesaler or Slant/Fin Corporation.
Ref. Description KC-50 KC-100
1 Gas Valve-RS7200 Dern 660520 660520
2 Combustion Blower 651307 651307
3 Electronic Control-Ram H1MC5-02 651308 651308
4 Circulator Pump-Taco 007 660561 660561
4A Circulator Pump-Grundfos UP15-42F 660562 660562
4B Circulator Pump-B&G NRF-22 660564 660564
5 Air Pressure Switch 651302 651302
6 Low Water Cutoff 651301 651301
6A Low Water Cutoff Clamp 650207 650207
7 Water High Limit 650564 650564
8 High Limit Well 410674 410674
9 Secondary High Limit (Optional) 660524 660524
10 Temperature/Pressure Gauge 910373061 910373061
11 Pressure Relief Valve 650550 650550
12 Automatic Air Vent 651303 651303
13 Blower Connector Hose 660510150 660510225
14* Hot Surface Ignitor 660720 660720
14A* Hot Surface Ignitor Hold-down 660276 660276
14B*
14C* Ignitor Perforated Shield 660721
15 Flame Detector 660501 660501
15A Flame Detector Bracket
15B Flame Detector Seal 660439 660439
16 LED Indicator Panel 650559 650559
17 Silicone Tubing 1/8 I.D. x 26" Long 660598026 660598026
18 Expansion Tank 650536 650539
19 Expansion Tank Connector Tube 651713 651713
20 Water Outlet Manifold 650401 650401
21 Air Pressure Service Fitting 660529 660529
22 Gas Pressure Service Fitting 660530 660530
23 Clear Tubing 1/8 I.D. x 8" Long 660531 660531
24 Clear Tubing 3/16 I.D. x 8" Long 660532 660532
27 Electronic Board Shield 650961 650961
28 Blower Optical Board 650560 650560
29 Safety Circuit 9 Pin Harness 651320 651320
30 Power Supply 4 Pin Harness 651321 651321
31 Optical Board Harness 651324 651324
32 LED Board Harness 651323 651323
33 Air Filter 6" x 11" 651306 651306
34 1/4 Turn Fastener 650541 650541
*Special Note on Reference Item #14: This Hot Surface Ignitor part number is only for use with Prodigy 21 boilers which incorporate an
Ignitor Guide Assembly 665038 665038
660721
660161 660161
air-cooled ignitor guide and perf
orated shield. Refer to identification label above ignitor on boiler.
This parts list must be left with owner, hung on or adjacent to
the boiler. Owner should retain parts list for future reference.
PUBLICATION NO. P-10PL-A
Part No. 65-2103
Printed in U.S.A. 600
Rev. A
Ref Description KC-50 KC-100
34A 1/4 Turn Receptacle 650542 650542
35 Air Orifice Adapter 660031 660031
36 Air Orifice Plate* 660191 660192
37 Air Orifice Gasket 660410 660410
38 Burner Enclosure 660021 660022
39 Barbed Fitting - 3/16" Tubing 650600 650600
0 Barbed Fitting - 1/8" Tubing 660596 660596
4
41 Burner Enclosure Seal 660441041 660441044
42 Burner Thumb Nut 660608 660608
43 Burner Hold-down Spring 650512 650512
44 Burner Ground Wire 660654 660654
45 Burner Compression Bracket 665101 665102
46 Ceramic Burner 660511 660512
47 Burner Ground Strip 660503 660503
48 Burner Seal Gasket 660431 660432
49 Gas Tube 660179 660179
50 3/4 NPT x 8" Long Gas Manifold Pipe 460514 460514
51 3/4 Angle Flange 660032 660032
52 3/4 Straight Flange 660033 660033
53 Convertible Gas Orifice Plate* 660181 660182
54 Socket Head Screw 8-32 x 2-1/4" 660631 660631
54 Socket Head Screw 8-32 x 1-1/2" 660632 660632
55 8-32 Hex Nut 650668 650668
60 Wall Mounting Panel 651714 651714
61 Boiler Support - Right Side 650233 650233
62 Boiler Support - Left Side 650234 650234
63 Expansion Tank Upper Strap 650221 650221
64 Expansion Tank Lower Strap 651711 651712
65 Jacket Top Screen 650218 650219
66 Jacket Brace Assembly 651118 651118
67 Jacket Upper Cover Clip 650733 650733
68 Jacket Removable Side Panel 650216 650217
69 Jacket Left Side Panel 651721 651722
70 Jacket Right Side Panel 651723 651724
71 Jacket Lower Cover Clip 650742 650742
72 Jac
ket Bottom Brace 650215 650215
73 Front Cover Panel - Black 650951 650951
73 A Front Co
ver Panel - White 650952 650952
73 B Front Cover Panel - Gray 650953 650953
73 C Front Cover Panel - Off-white 650954 650954
74 LED Window Plug 650551 650551
* Note: These Prodigy boiler models utilize the same air and gas orifices as the Concept series of boilers. Therefore, the model number
shown on the orifice plates reflect the Concept boiler model’s identification. (Prodigy KC-50 uses orifice plates marked “45” and KC-100
uses orifice plates marked “90”.)
Optional Boiler Calibration Equipment:
Calibration Gage Kit . . .665185 . . . .0 to 1” gage on stand with tubing and service fitting adapters.
Service Fitting Adapter .660533 . . . .for gages with 3/16" I.D. tubing.
2