100306296_2000558805_Rev D
Replacement Parts List
PARTS & SERVICE DEPARTMENT
Nashville, Tennessee
877-554-5544 • Fax: 615-882-2918
parts_team@lochinvar.com
www.Lochinvar.com
Crest
®
Heating Boilers
FBN(L) 2501 - 6001
41
34
38
37
49
48
47
2
7
46
5
39
40
6
8
4
51
42
31
DIR #2000558420 00
CONTROL PANEL
HEAT EXCHANGER
15
16
26
11
33
25
22
24
1
3
27
23
28
32
DIR #2000558439 00
45
30
29
DISPLAY PANEL
35
12 13
2
36
33
DIR #2000563299 00
8
DIR #2000541196 00
43
14
44
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DIR #2000558450 00
GAS TRAIN
(FBN/L 4001 - 6001)
20
19
18
21
17
GAS TRAIN
(FBN/L 2501 - 3501)
9
10
21
17
19
20
DIR #2000558469 00
ITEM
NO.
1 100309869* INTEGRATED CONTROL FB 2501 - 3501
1 100309870* INTEGRATED CONTROL FB 4001 - 6001
2 100311038 DISPLAY INTERFACE ASSEMBLY ALL
- 100311232 GASKET, USER INTERFACE DISPLAY ALL
3 100275047 BACNET BOARD ALL
4 100208481* LOW VOLTAGE CONTROL BOARD ALL
5 100208476* LOW VOLTAGE CONTROL BOARD ALL
6 100208552* SENSOR, SYSTEM / INLET ALL
- 100208557* SENSOR, DUAL OUTLET ALL
- 100208558 SENSOR, PREMIX THERMOSTAT LIMIT ALL
7 100271315* HIGH LIMIT ALL
8 100233695* BULBWELL, SYSTEM / INLET / OUTLET ALL
- 100233613 BULBWELL, SENSOR, PREMIX TSTAT LIMIT ALL
9 100144990 FAN ASSEMBLY FB 2501 - 3501
9 100304907 FAN ASSEMBLY FB 4001 - 6001
100306296_2000558805_Rev D
PART
NO.
DESCRIPTION MODEL
CONTROLS
PLEASE HAVE MODEL AND SERIAL NUMBER WHEN ORDERING PARTS
*ITEMS DENOTE SUGGESTED INVENTORY PARTS
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ITEM
NO.
- 100274709* GASKET, BLOWER FB 2501 - 3501
- 100233698* GASKET, VENTURI FB 2501 - 3501
- 100304944* GASKET, BURNER / FAN FB 3501
- 100304945* GASKET, BLOWER FB 4001 - 6001
- 100208400* PRESSURE SWITCH ALL
- 100208399* PRESSURE SWITCH FB 2501 - 3501, 5001
10 100276801* PRESSURE SWITCH FB 4001 - 6001
11 100208509* RELAY, 120VAC, 60HZ, 10.8 AMP FB 4001 - 6001
12 100277797 MOMENTARY SWITCH, RED - 20 AMP, 125 VOLT ALL
13 100277798 MOMENTARY SWITCH, BLACK - 20 AMP, 125 VOLT ALL
14 100274739 SWITCH, DISCONNECT ALL
15 100208230 TRANSFORMER, 24V, 40VA ALL
- 100274743 TRANSFORMER, SPARK ALL
16 100173747 LOW WATER CUT-OFF, MANUAL RESET ALL
- 100277799 PROBE, LWCO ALL
- 100277801 BOOT, LWCO ALL
PART
NO.
DESCRIPTION MODEL
CONTROLS (CONTINUED)
GAS TRAIN ASSEMBLY
17 100304951 GAS VALVE ASSEMBLY - LARGE FB 2501 - 4001
17 100304954 GAS VALVE ASSEMBLY - LARGE FB 5001 - 6001
18 100304952 GAS VALVE ASSEMBLY - SMALL FB 2501 - 3001
18 100304953 GAS VALVE ASSEMBLY - SMALL FB 3501, 5001, 6001
18 100304955 GAS VALVE ASSEMBLY - SMALL FB 4001
19 100208105* GASKET, FLANGE VENTURI FB 2501 - 3501
20 100233698* GASKET, FAN / VENTURI FB 2501 - 3501
20 100289441* GASKET, FAN / VENTURI FB 4001 - 6001
21 100274223 VENTURI ASSEMBLY FB 2501 - 3501
21 100306265 VENTURI ASSEMBLY FB 4001 - 6001
- 100289680 VALVE, PROOF OF CLOSURE FB 6001
- 100289691 VALVE ACTUATOR, PROOF OF CLOSURE FB 6001
PILOT & BURNER ASSEMBLIES
22 100279407* FLAME SENSOR W/ GASKET ALL
23 100304988 GASKET, FLAME SENSOR ALL
24 100304989* IGNITOR W/ GASKET NOTE: PLEASE CONSULT FACTORY FOR 4001 MODELS ALL
25 100305001 GASKET, IGNITOR ALL
26 100305002 BURNER ASSEMBLY W/ GASKETS FB 2501
26 100305003 BURNER ASSEMBLY W/ GASKETS FB 3001
26 100305004 BURNER ASSEMBLY W/ GASKETS FB 3501
26 100305005 BURNER ASSEMBLY W/ GASKETS FB 4001
26 100305007 BURNER ASSEMBLY W/ GASKETS FB 5001
26 100305006 BURNER ASSEMBLY W/ GASKETS FB 6001
27 100305008 GAS / AIR MANIFOLD W/ GASKET FB 2501 - 3501
27 100305009 GAS / AIR MANIFOLD W/ GASKET FB 4001 - 6001
28 100305010* GASKET, MANIFOLD FB 2501 - 3501
28 100305011* GASKET, MANIFOLD FB 4001
29 100305012 HEAT EXCHANGER DOOR ASSEMBLY FB 2501 - 3001
29 100305014 HEAT EXCHANGER DOOR ASSEMBLY FB 3501
29 100305015 HEAT EXCHANGER DOOR ASSEMBLY FB 4001
29 100305016 HEAT EXCHANGER DOOR ASSEMBLY FB 5001
29 100305017 HEAT EXCHANGER DOOR ASSEMBLY FB 6001
MISCELLANEOUS
30 100311165 SIGHT GLASS KIT ALL
- 100304818 FIBERBOARD, BURNER FB 2501 - 3001
- 100304819 FIBERBOARD, BURNER FB 3501
PLEASE HAVE MODEL AND SERIAL NUMBER WHEN ORDERING PARTS
*ITEMS DENOTE SUGGESTED INVENTORY PARTS
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ITEM\
NO.
- 100304820 FIBERBOARD, BURNER FB 4001
- 100304861 FIBERBOARD, BURNER FB 5001
- 100304862 FIBERBOARD, BURNER FB 6001
31 100304863 INSULATION, HEX WRAP FB 2501 - 3001
31 100304865 INSULATION, HEX WRAP FB 3501
31 100304866 INSULATION, HEX WRAP FB 4001
31 100304867 INSULATION, HEX WRAP FB 5001
31 100304864 INSULATION, HEX WRAP FB 6001
32 100304868 INSULATION, HEX TOP FB 2501 - 3001
32 100304869 INSULATION, HEX TOP FB 3501
32 100304870 INSULATION, HEX TOP FB 4001
32 100304871 INSULATION, HEX TOP FB 5001
32 100304872 INSULATION, HEX TOP FB 6001
33 100304873* GASKET SET FB 2501 - 3001
33 100304874* GASKET SET FB 3501
33 100304875* GASKET SET FB 4001
33 100304876* GASKET SET FB 5001
33 100304877* GASKET SET FB 6001
- 100233667 GASKET, SIGHT GLASS TOP ALL
34 100296212 AIR INLET COVER FB 2501 - 3501
34 100300992 AIR INLET COVER FB 4001
34 100294193 AIR INLET COVER FB 5001 - 6001
35 100163269 MOUNTING PLATE ASSEMBLY ALL
36 100289693 LCD HOLDER ALL
37 100289541 TOP BEZEL ALL
38 100289540 DISPLAY BEZEL ALL
39 100274781 PRESSURE RELIEF VALVE, 1-1/2” X 1-1/4”, 50 PSI FB 2501 - 3001
39 100274785 PRESSURE RELIEF VALVE, 1-1/2” X 2”, 50 PSI FB 3501
39 100274786 PRESSURE RELIEF VALVE, 2”, 50 PSI FB 4001 - 5001
39 100289694 PRESSURE RELIEF VALVE, 2” X 2-1/2”, 50 PSI FB 6001
40 100208153* GAUGE, T&P, 0-75 PSI, 50-320F, 3”, 1/2 NPT ALL
41 100208561* SENSOR, FLUE TEMP ALL
- 100297143* CONDENSATE TRAP ALL
42 100304887 FLEX GAS PIPE - 1” FB 2501 - 3001
42 100288457 FLEX GAS PIPE - 1 1/4” FB 3501 - 6001
43 100277773 FUSE BLOCK - 480 VOLT, 30 AMP ALL
- 100277805* FUSE, 30A 480V CLASS G ALL
44 100274738 CONTACTOR, RELAY ALL
45 100277806 USB CABLE ALL
- 100277807 GASKET, AIR INLET COVER FB 2501
- 100277719 GASKET, AIR INLET COVER FB 3001 - 3501
- 100277777 GASKET, AIR INLET COVER FB 4001
- 100277778 GASKET, AIR INLET COVER FB 5001 - 6001
- 100208807* FUSE - 1.25 AMP / 250 VOLT ALL
- 100208231* FUSE - 3.15A / 250V ALL
- 100208232* FUSE - 5A / 250V ALL
- 100208834 OUTDOOR AIR SENSOR ALL
- 100277791 CONDENSATE HOSE, BRAIDED, 3/8” ALL
- 100277792 CONDENSATE HOSE, BRAIDED, 1” ALL
- 100277793 SILICONE TUBING, 1/4” ALL
- 100208336 ALUMINUM TUBING, 1/4” ALL
- 100232751* DOOR CATCH ALL
PART
NO.
DESCRIPTION MODEL
MISCELLANEOUS (CONTINUED)
PLEASE HAVE MODEL AND SERIAL NUMBER WHEN ORDERING PARTS
*ITEMS DENOTE SUGGESTED INVENTORY PARTS
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ITEM
NO.
PART
NO.
DESCRIPTION MODEL
MISCELLANEOUS (CONTINUED)
- 100208818* DOOR STRIKE ALL
- 100274737 ANTENNA, USB ADAPTER, WIRELESS ALL
- 100289696 CABLE, USB 2.0 - 12” ALL
- 100289697 CABLE, USB 2.0 - 60” ALL
- 100288513 PANEL MOUNTING CABLE ALL
JACKET ASSEMBLIES
46 100297417 JACKET, OUTER TOP REAR FB 2501 - 3001
46 100299740 JACKET, OUTER TOP REAR FB 3501 - 4001
46 100299580 JACKET, OUTER TOP REAR FB 5001 - 6001
47 100296224 JACKET, OUTER TOP MIDDLE FB 2501 - 3001
47 100299651 JACKET, OUTER TOP MIDDLE FB 3501 - 4001
47 100299544 JACKET, OUTER TOP MIDDLE FB 5001 - 6001
48 100296235 JACKET, OUTER FRONT LOWER DOOR FB 2501 - 3001
48 100299722 JACKET, OUTER FRONT LOWER DOOR FB 3501 - 4001
48 100299608 JACKET, OUTER FRONT LOWER DOOR FB 5001 - 6001
49 100296241 JACKET, OUTER FRONT UPPER DOOR FB 2501 - 3001
49 100299716 JACKET, OUTER FRONT UPPER DOOR FB 3501 - 4001
49 100299626 JACKET, OUTER FRONT UPPER DOOR FB 5001 - 6001
50 100294451 CONTROL PANEL COVER ALL
PLEASE HAVE MODEL AND SERIAL NUMBER WHEN ORDERING PARTS
100306296_2000558805_Rev D
*ITEMS DENOTE SUGGESTED INVENTORY PARTS
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NOTES
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© 11/18 - Printed in U.S.A.