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Ref. Description KCS-50 KCS-100
1 Gas Valve-RS7200 Dern 660520 660520
2 Combustion Blower 660527 660527
3 Electronic Control-United Tech.1013-12 660589 660589
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-Manual Reset 651341 651341
6A Low Water Cutoff Spring 651342 651342
6B Water Limit Connector Harness 651343 651343
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* Ignitor Guide Assembly 665038 665038
14C* Ignitor Perforated Shield 660721 660721
15 Flame Detector 660501 660501
15A Flame Detector Bracket 660161 660161
15B Flame Detector Seal 660439 660439
16 24v Transformer 660528 660528
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
28 Thermostat Terminal Block 660523 660523
29 Safety Circuit 9 Pin Harness 651344 651344
30 Power Supply 3 Pin Harness 660652 660652
31 Flame Sensor Harness 660660 660660
32 Circulator Harness 660653 660653
33 Air Filter 6" x 11" 651306 651306
34 1/4 Turn Fastener 650541 650541
PRODIGY 21
®
Gas-fired • Direct Vent • Cast-iron • Hot water boilers
BOILER REPLACEMENT PARTS LIST
For Models KCS-50 and KCS-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.
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-B
Part No. 65-2113
Printed in U.S.A. 1100
*Special Note on Reference Item #14:This Hot Surface Ignitor part number is only for use with Prodigy 21 boilers which incorporate an
air-cooled ignitor guide and perf
orated shield. Refer to identification label above ignitor on boiler.