Slant-Fin CB User Manual
CB SERIES
™
Gas-fired • Sealed Combustion
CONCEPT 21
Cast-iron • Hot water boilers
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.
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
15A Flame Detector Bracket 660161 660161 660161 660161
15B Flame Detector Seal 660439 660439 660439
16
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
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
Silicone Tubing 1/8" I.D. x 26" long 660598026 660598026 660598026 660598026
Circulator Board Harness 660653 660653 660653 660653
660501
660501
660439
*Special Note on Reference Item #14: This Hot Surface Ignitor part number is only for use with Concept 21 boilers which incorporate an
†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.
This parts list must be left with owner, hung on or adjacent to
the boiler. Owner should retain parts list for future reference.
air-cooled ignitor guide and perforated shield. Refer to identification label above ignitor on boiler.
PUBLICATION CB-10PL
Part No. 66-1003
Rev. G
Ref Description CB-45 CB-90 CB-135 CB-180
35 Air Orifice Adapter 660031 660031 660031 660031
36 Air Orifice Plate* 660191 660192 660193 660194
37 Air Orifice Gasket 660410 660410 660410 660410
38 Burner Enclosure 660021 660022 660023 660024
39 Barbed Fitting - 3/16" tube x 1/8" NPT 650600 650600 650600 650600
40 Barbed Fitting - 1/8" tube x 10-32 660596 660596 660596 660596
41 Burner Enclosure Seal 660441041 660441044 660441047 660441050
42 Burner Thumb Nut 660608 660608 660608 660608
43 Burner Hold-down Spring 650512 650512 650512 650512
44 Burner Ground Wire 660654 660654 660654 660654
45 Burner Compression Bracket 665101 665102 665103 665104
46 Ceramic Burner 660511 660512 660513 660514
47 Burner Ground Strip 660503 660503 660503 660503
48 Burner Seal Gasket 660431 660432 660433 660434
49 Gas Tube 660179 660179 660179 660179
50 3/4 NPT Gas Manifold Pipe 660536 660537 660538 660538
51 3/4 Angle Flange 660032 660032 660032 660032
52 3/4 Straight Flange 660033 660033 660033 660033
53 Convertible Gas Orifice Plate* 660181 660182 660183 660184
54 Socket Head Screw 8-32 x 2-1/4" 660631 660631 660631 660631
54 Socket Head Screw 8-32 x 1-1/2" 660632 660632 660632 660632
55 8-32 Hex Nut 650668 650668 650668 650668
60 Floor Rail 660201 660202 660203 660204
61 Casting Support Leg 660261 660262 660263 660264
62 Leg Support Bracket 660205 660205 660205 660205
63 Tray 660168 660168 660168 660168
64 Jacket Support Bracket 660251 660252 660253 660254
65 Enclosure Top Cover 660131 660132 660133 660134
66 Boiler Jacket Top Panel 660231 660232 660233 660234
67 Boiler Jacket Rear Panel 660217 660217 660217 660217
68 Boiler Jacket Front Panel 660216 660216 660216 660216
69 Boiler Jacket Left (Front) Side Panel 660226 660226 660226 660226
70 Boiler Jacket Left (Back) Side Panel 660221 660222 660223 660224
71 Boiler Jacket Right Side Panel 660211 660212 660213 660214
72 1/4 Turn Pawl Latch 005075 005075 005075 005075
72A 1/4 Turn Slotted Stud 110028 110028 110028 110028
73 Air Inlet Cover Plate 660235 660235 660235 660235
*
Special Note on Reference Items #36 and #53:
The parts which incorporate this revised orificing design feature a gas orifice plate which contains both the natural gas and the propane gas
orifice hole. This design allows for built-in gas conversion ease and can be identified by a label on the left side jacket panel which describes
the convertible gas orifice. For the original design orifice plate, which contains both the air and gas orifice hole, refer to the chart below.
Description CB-45 CB-90 CB-135 CB-180
Air/Gas Orifice Plate - Nat. Gas 660171 660172 660173 660174
Air/Gas Orifice Plate - Propane 660175 660176 660177 660178
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
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