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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. 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 *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 perforated shield. Refer to identification label above ignitor on boiler. PUBLICATION NO. P-10PL-B This parts list must be left with owner, hung on or adjacent to Part No. 65-2113 the boiler. Owner should retain parts list for future reference. Printed in U.S.A. 1100 ;