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Ref Description CB-45 CB-90 CB-135 CB-180
1 Gas Valve-RS7200 Dern 660520 660520 660520 660520
2 Combustion Blower 660527 660527 660527 660527
3† Electronic Control-U.T.1013-12 660589 660589 660589 660589
4 Circulator Pump-Taco 007 660561 660561 660561 660561
4A Circulator Pump-Grundfos UP15-42F 660562 660562 660562 660562
4B Circulator Pump-B&G NRF-22 660564 660564 660564 660564
5 Air Press. Switch (Standard, .12" set) 651302 651302 651302 651302
5A Air Press. Switch (Cat. I, .50" set) 660591 660591 660591 660591
6 24 Volt Transformer 660528 660528 660528 660528
7 Water High Limit 410699 410699 410699 410699
8 High Limit Well 660507 660507 660507 660507
9 Secondary High Limit (optional) 660524 660524 660524 660524
10 Temperature/Pressure Gauge 910373061 910373061 910373061 910373061
11 Pressure Relief Valve (30 psi) 650550 650550 650550 650550
12 Automatic Air Vent 410547 410547 410547 410547
13 Blower Connector Hose 660510350 66051045 660510525 660510625
14* Hot Surface Ignitor 660720 660720 660720 660720
14A* Hot Surface Ignitor Hold-down 660276 660276 660276 660276
14B* Ignitor Guide Assembly 665038 665038 665038 665038
14C* Ignitor Perforated Shield 660721 660721 660721 660721
15 Flame Detector 660501 660501
660501
660501
15A Flame Detector Bracket 660161 660161 660161 660161
15B Flame Detector Seal 660439 660439 660439
660439
16
Silicone Tubing 1/8" I.D. x 26" long 660598026 660598026 660598026 660598026
19 Thermostat Terminal Block 660523 660523 660523 660523
20 Water Outlet Manifold 660005 660005 660005 660005
21 Air Pressure Service Fitting 660529 660529 660529 660529
22 Gas Pressure Service Fitting 660530 660530 660530 660530
23 Clear Tubing 1/8" I.D. x 8" long 660531 660531 660531 660531
24 Clear Tubing 3/16" I.D. x 8" long 660532 660532 660532 660532
28 Flame Sensor Harness 660660 660660 660660 660660
29 Safety Circuit 9 Pin Harness 660650 660650 660650 660650
30 Power Supply Harness 660652 660652 660652 660652
31
Circulator Board Harness 660653 660653 660653 660653
32 Circulator External Harness 660655 660655 660655 660655
33 Air Filter Box Assembly 665007 665007 665007 665007
34 Air Filter 10" x 12" 660515 660515 660515 660515
CONCEPT 21
BOILER REPLACEMENT PARTS LIST
When ordering replacement parts, specify the boiler model number, serial number and gas by name (natural or
propane). For replacement parts, heating contractors should contact their Slant/Fin boiler distributor.
This parts list must be left with owner, hung on or adjacent to
the boiler. Owner should retain parts list for future reference.
PUBLICATION CB-10PL
Part No. 66-1003
Rev. G
*Special Note on Reference Item #14:This Hot Surface Ignitor part number is only for use with Concept 21 boilers which incorporate an
air-cooled ignitor guide and perforated shield. Refer to identification label above ignitor on boiler.
™
CB SERIES
Gas-fired • Sealed Combustion
Cast-iron • Hot water boilers
†For replacing the Ram Electronics control on older model boilers, contact Slant/Fin Technical Service Department for the U.T. 1013-12
control kit available.