™
CONCEPT 21
CB SERIES
Gas-fired • Sealed Combustion
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
1
2
3†
4
4A
4B
5
5A
6
7
8
9
10
11
12
13
14*
14A*
14B*
14C*
15
15A
15B
16
19
20
21
22
23
24
28
29
30
31
32
33
34
Description
Gas Valve-RS7200 Dern
Combustion Blower
Electronic Control-U.T.1013-12
Circulator Pump-Taco 007
Circulator Pump-Grundfos UP15-42F
Circulator Pump-B&G NRF-22
Air Press. Switch (Standard, .12" set)
Air Press. Switch (Cat. I, .50" set)
24 Volt Transformer
Water High Limit
High Limit Well
Secondary High Limit (optional)
Temperature/Pressure Gauge
Pressure Relief Valve (30 psi)
Automatic Air Vent
Blower Connector Hose
Hot Surface Ignitor
Hot Surface Ignitor Hold-down
Ignitor Guide Assembly
Ignitor Perforated Shield
Flame Detector
Flame Detector Bracket
Flame Detector Seal
Silicone Tubing 1/8" I.D. x 26" long
Thermostat Terminal Block
Water Outlet Manifold
Air Pressure Service Fitting
Gas Pressure Service Fitting
Clear Tubing 1/8" I.D. x 8" long
Clear Tubing 3/16" I.D. x 8" long
Flame Sensor Harness
Safety Circuit 9 Pin Harness
Power Supply Harness
Circulator Board Harness
Circulator External Harness
Air Filter Box Assembly
Air Filter 10" x 12"
CB-45
CB-90
CB-135
CB-180
660520
660527
660589
660561
660562
660564
651302
660591
660528
410699
660507
660524
910373061
650550
410547
660510350
660720
660276
665038
660721
660501
660161
660439
660598026
660523
660005
660529
660530
660531
660532
660660
660650
660652
660653
660655
665007
660515
660520
660527
660589
660561
660562
660564
651302
660591
660528
410699
660507
660524
910373061
650550
410547
66051045
660720
660276
665038
660721
660501
660161
660439
660598026
660523
660005
660529
660530
660531
660532
660660
660650
660652
660653
660655
665007
660515
660520
660527
660589
660561
660562
660564
651302
660591
660528
410699
660507
660524
910373061
650550
410547
660510525
660720
660276
665038
660721
660501
660161
660439
660598026
660523
660005
660529
660530
660531
660532
660660
660650
660652
660653
660655
665007
660515
660520
660527
660589
660561
660562
660564
651302
660591
660528
410699
660507
660524
910373061
650550
410547
660510625
660720
660276
665038
660721
660501
660161
660439
660598026
660523
660005
660529
660530
660531
660532
660660
660650
660652
660653
660655
665007
660515
*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.
†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.
PUBLICATION CB-10PL
Part No. 66-1003
Rev. G
Ref
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
54
55
60
61
62
63
64
65
66
67
68
69
70
71
72
72A
73
Description
Air Orifice Adapter
Air Orifice Plate*
Air Orifice Gasket
Burner Enclosure
Barbed Fitting - 3/16" tube x 1/8" NPT
Barbed Fitting - 1/8" tube x 10-32
Burner Enclosure Seal
Burner Thumb Nut
Burner Hold-down Spring
Burner Ground Wire
Burner Compression Bracket
Ceramic Burner
Burner Ground Strip
Burner Seal Gasket
Gas Tube
3/4 NPT Gas Manifold Pipe
3/4 Angle Flange
3/4 Straight Flange
Convertible Gas Orifice Plate*
Socket Head Screw 8-32 x 2-1/4"
Socket Head Screw 8-32 x 1-1/2"
8-32 Hex Nut
Floor Rail
Casting Support Leg
Leg Support Bracket
Tray
Jacket Support Bracket
Enclosure Top Cover
Boiler Jacket Top Panel
Boiler Jacket Rear Panel
Boiler Jacket Front Panel
Boiler Jacket Left (Front) Side Panel
Boiler Jacket Left (Back) Side Panel
Boiler Jacket Right Side Panel
1/4 Turn Pawl Latch
1/4 Turn Slotted Stud
Air Inlet Cover Plate
CB-45
660031
660191
660410
660021
650600
660596
660441041
660608
650512
660654
665101
660511
660503
660431
660179
660536
660032
660033
660181
660631
660632
650668
660201
660261
660205
660168
660251
660131
660231
660217
660216
660226
660221
660211
005075
110028
660235
CB-90
660031
660192
660410
660022
650600
660596
660441044
660608
650512
660654
665102
660512
660503
660432
660179
660537
660032
660033
660182
660631
660632
650668
660202
660262
660205
660168
660252
660132
660232
660217
660216
660226
660222
660212
005075
110028
660235
CB-135
660031
660193
660410
660023
650600
660596
660441047
660608
650512
660654
665103
660513
660503
660433
660179
660538
660032
660033
660183
660631
660632
650668
660203
660263
660205
660168
660253
660133
660233
660217
660216
660226
660223
660213
005075
110028
660235
CB-180
660031
660194
660410
660024
650600
660596
660441050
660608
650512
660654
665104
660514
660503
660434
660179
660538
660032
660033
660184
660631
660632
650668
660204
660264
660205
660168
660254
660134
660234
660217
660216
660226
660224
660214
005075
110028
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
Air/Gas Orifice Plate - Nat. Gas
Air/Gas Orifice Plate - Propane
CB-45
CB-90
CB-135
CB-180
660171
660175
660172
660176
660173
660177
660174
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
CONCEPT 21
Sealed Combustion Gas Boiler
Exploded View
MECHANICAL
CONTROLS & DEVICES
BURNER AND AIR / GAS SUPPLY
COMPONENTS
BOILER SUPPORT AND JACKET PARTS
3
OPTIONAL VENT SYSTEM PARTS AND KITS
3" DIAMETER SAF-T VENT EZ SEAL SYSTEM (AL 29-4C STAINLESS STEEL)
Ref
82
—
—
—
—
—
—
—
—
—
—
84
85
—
—
—
—
—
87
Description
Slant/Fin Part #
Heat Fab Part #
(EZ Seal)
665197
455020
455021
455022
455023
455024
455025
455017
455018
455019
455027
440683
660548
440678
440679
440692
440680
440685
660549
SF35CC-1
9301
9302
9304
9305
9307
9324
9311
9314
9314LR
9321
7390TEE
7392GC
7314TERM
7323GCC
7323GC2
4327SS
5318CI
73FINADP
Concentric Vent Terminal
6" long vent pipe
12" long vent pipe
18" long vent pipe
24" long vent pipe
37-1/2" long vent pipe
Slip joint connector (6"-19")
45 Deg. elbow
90 Deg. elbow, tight radius
90 Deg. elbow, standard radius
In-line condensate drain
Screen Term. Tee
Screen Term. Straight
Screen Term. Elbow
Support, 6" Clearance
Support, 2" Clearance
Support Clamp
Firestop
3" x 5" Adapter
SEALANTS FOR VENT SYSTEM
86
—
—
GE-RTV 106, 3 oz. tube
Dow-Corning 732, 3 oz. tube
Dow-Corning 732, 10 oz. cartridge
440690
440691
440693
Horizontal Venting Concentric Vent Terminal Kit
Part No. 665197
Ref # 82
Vertical Venting Roof Termination Kit
Part No. 665192
Includes Ref # 85, 86, 89, 90, 94
Horizontal Venting Separation Kit
Part No. 665193
Includes Ref # 84, 86, 89, 94
3" PVC FOR AIR INTAKE SYSTEM
88
89
90
94
Coupling (sewer and drain)
90° Elbow (Schedule 40)
90° Street Elbow (Schedule 40)
3" Air Inlet Screen (stainless)
660571
660577
660578
660236
MISCELLANEOUS PARTS
—
Wall Passage Thimble*
440695
Chimney and “B” Vent Adapter Kit
Part No. 665194
Includes Ref # 86, 87, 5A
* Not needed where concentric vent terminal used. Does require use of a
slip-joint connecter for vent passage.
©Slant/Fin Corp. 2003. Printed in U.S.A. 303
SLANT/FIN CORPORATION, Greenvale, N.Y. 11548 • Phone: (516) 484-2600
FAX: (516) 484-5921 • Canada: Slant/Fin LTD/LTEE, Mississauga, Ontario
www.slantfin.com