York LC8 Guide

Unitary Products Group
FC8T SERIES 2-STAGE UPFLOW/HORIZONTAL
NATURAL GAS FURNACES - (80%)
INCLUDING LO-NOX (MODEL LC8) (STYLE A)
Supersedes: 035-20353-001 Rev. A (0504) 035-20353-001 Rev. B (0305)
HVAC SERVICE PARTS 1 of 8
Figure 1: 2-STAGE UPFLOW/HORIZONTAL NATURAL GAS FURNACES (80%)
FIG ITEM DESCRIPTION FC8T060A12UH11A FC8T080A12UH11A FC8T080B16UH11A FC8T100B12UH11A LC8T060A12UH11A LC8T080A12UH11A LC8T080B16UH11A ---
(3 BURNER) (4 BURNER) (4 BURNER) (5 BURNER)
MOTORS
*1MOTOR, DIRECT DRIVE BLOWER 024-31969-000 024-31969-000 024-26002-000 024-25110-000
1 2 MOTOR, VENTOR ASS’Y 024-27653-000 024-27653-000 024-27653-000 024-27653-000
ELECTRICAL
1 3 CAPACITOR, RUN (7.5MFD/370V) [RC]024-20045-000 024-20045-000 --- 024-20045-000
CAPACITOR, RUN (10MFD/370V) [RC] --- --- 024-20046-000 ---
1 4 CONTROL, HIGH LIMIT 025-29041-005 025-29041-005 025-29041-005 025-29041-005
1 5 CONTROL, FURNACE [FC] 031-09117-000 031-09117-000 031-09117-000 031-09117-000
1 6 IGNITER 025-32625-000 025-32625-000 025-32625-000 025-32625-000
1,3 7SENSOR, FLAME 025-27773-000 025-27773-000 025-27773-000 025-27773-000
1 8 SWITCH, AIR PRESSURE [1LP] 024-27655-001 024-27656-001 024-27656-001 024-27657-001
1 9 SWITCH, DOOR [SW] 024-31943-000 024-31943-000 024-31943-000 024-31943-000
*10 TRANSFORMER 025-30889-000 025-30889-000 025-30889-000 025-30889-000
1,3 11 VALVE, GAS 025-35394-000 025-35394-000 025-35394-000 025-35394-000
1,3 12 SWITCH, FLAME ROLL-OUT [ROS 3] 025-27747-016 025-27747-016 025-27747-016 025-27747-018
312A CONTROL, Flame Roll Out(2ea)[ROS1,2] 025-27792-009 025-27792-009 025-27792-009 025-27792-009
1 13 CONTROL, AUX. LIMIT (2 ea) [LS2,LS3] 025-30321-000 025-30321-000 025-30321-000 025-30321-000
*14 FUSE (ATO 3) 025-32746-026 025-32746-026 025-32746-026 025-32746-026
15
AIR MOVING
1 16 HOUSING, BLOWER 373-17827-001 373-17827-001 373-17829-002 373-17827-001
1 17 WHEEL, BLOWER 026-35497-000 026-35497-000 026-19654-009 026-19654-003
*17A CUTOFF, BLOWER --- --- 063-93198-000 ---
NOTE: *Not Shown
New replacement parts shown in bold face type at the first printing of parts list dated 3/05.
Major components and suggested stocking items are shown with shaded item number.
“<“ Across from row indicates a change in that row.

Unitary Products Group
035-20353-001 Rev. B (0305) 2 of 8
Figure 2: 2- STAGE UPFLOW/HORIZONTAL NATURAL GAS FURNACES (80%)
FIG ITEM DESCRIPTION FC8T060A12UH11A FC8T080A12UH11A FC8T080B16UH11A FC8T100B12UH11A LC8T060A12UH11A LC8T080A12UH11A LC8T080B16UH11A ---
(3 BURNER) (4 BURNER) (4 BURNER) (5 BURNER)
FABRICATED PARTS
2 18 SHIELD, SECONDARY AIR 073-17404-003 073-17404-004 073-17404-004 073-17404-005
*19 BAFFLE, FLUE 073-17775-001 073-17775-002 073-17775-002 073-17775-003
2,3 20 BURNER, MAIN GAS 029-20482-000 029-20482-000 029-20482-000 029-20482-000
2 21 BRACKET, IGNITER 073-17403-000 073-17403-000 073-17403-000 073-17403-000
2 22 DECK, BLOWER (Rear) 073-17502-002 073-17502-002 073-12081-001 073-12081-001
2 23 DECK, FRONT 073-17496-000 073-17496-000 073-17497-000 073-17497-000
2 24 HEAT EXCHANGER ASS’Y 373-17477-003 373-17477-004 373-17477-008 373-17477-005
2,3 25 MANIFOLD, GAS 029-22114-002 029-22114-003 029-22114-003 029-22114-004
2 26 PANEL, UPPER ACCESS 373-19814-427 373-19814-427 373-19812-427 373-19812-427
2 27 PAN, BASE 073-19813-090 073-19813-090 073-19812-090 073-19812-090
2 28 PANEL, BLOWER ACCESS 373-19814-417 373-19814-417 373-19812-417 373-19812-417
2 29 PANEL, TOP 073-19862-061 073-19862-061 073-19862-062 073-19862-062
2 30 WRAPPER, INSULATED 373-19862-001 373-19862-001 373-19862-002 373-19862-002
2 31 CHANNEL, TOE PLATE 073-19862-051 073-19862-051 073-19862-052 073-19862-052
2 32 BRACKET, TOP DOOR 073-19862-071 073-19862-071 073-19862-072 073-19862-072
2 33 BRACKET, BOTTOM DOOR 073-19862-075 073-19862-075 073-19862-076 073-19862-076
*34 RACK, FILTER 026-38509-000 026-38509-000 026-38509-000 026-38509-000
2 35 FRAME, SIDE BASE (2 Req’d) 073-19811-085 073-19811-085 073-19811-085 073-19811-085
3 36 BRACKET, ROLL-OUT SWITCH 073-12033-000 073-12033-000 073-12033-000 073-12033-000
337 ORIFICE, BURNER (Natural #45) 029-21182-045 029-21182-045 029-21182-045 029-21182-045
238 PLATE, RESTRICTOR 073-17777-156 073-17487-184 073-17785-184 073-17488-209
2 39 COLLAR, FLUE 073-17507-000 073-17507-000 073-17507-000 073-17507-000
*40 LO-NOX SCREEN (L Models only) 026-35452-000 026-35452-000 026-35452-000 ---
NOTE: *Not Shown
New replacement parts shown in bold face type at the first printing of parts list code dated 3/05.
Major components and suggested stocking items are shown with shaded item number.
“<“ Across from row indicates a change in that row.

Unitary Products Group
3 of 8 035-20353-001 Rev. B (0305)
Figure 3: GAS CONTROLS
FIG ITEM DESCRIPTION FC8T060A12UH11A FC8T080A12UH11A FC8T080B16UH11A FC8T100B12UH11A LC8T060A12UH11A LC8T080A12UH11A LC8T080B16UH11A ---
(3 BURNER) (4 BURNER) (4 BURNER) (5 BURNER)
MISCELLANEOUS
*41 FILTER (.75 x 16 x 25) 026-38508-000 026-38508-000 026-38508-000 026-38508-000
242 SIGHT GLASS, OVAL 025-38899-000 025-38899-000 025-38899-000 025-38899-000
243 GASKET, RESTRICTOR PLATE 028-13258-000 028-13259-000 028-13281-000 028-13260-000
244 TUBING, SILICONE 028-12499-000 028-12499-000 028-12499-000 028-12499-000
45
*46 DIAGRAM, WIRING 035-19675-002 035-19675-002 035-19675-002 035-19675-002
*47 HARNESS, MAIN WIRING 373-19870-011 373-19870-011 373-19870-011 373-19870-011
*48 ISOLATOR, TUBE (3 Req’d) --- --- 028-09412-001 028-09412-001
*49 ISOLATOR, WASHER (3 Req’d) --- --- 028-09412-002 028-09412-002
*50 ISOLATOR, SLEEVE (3 Req’d) --- --- 028-09412-003 028-09412-003
*51 MOUNT, MOTOR --- --- 026-31459-000 026-31480-000
*52 GROMMET, 1/2” DIA. 025-30823-000 025-30823-000 025-30823-000 025-30823-000
253 DOOR KNOB (4 Req’d) 026-39490-000 026-39490-000 026-39490-000 026-39490-000
*54 RETAINER, DOOR KNOB (4 Req’d) 021-31394-000 021-31394-000 021-31394-000 021-31394-000
*55 NUT, SELF THREADING (10 Req’d) 021-31395-000 021-31395-000 021-31395-000 021-31395-000
*56 RETAINER, SQUARE 028-15190-000 028-15190-000 028-15190-000 028-15190-000
NOTE: *Not Shown
New replacement parts shown in bold face type at the first printing of parts list dated 3/05.
Major components and suggested stocking items are shown with shaded item number.
“<“ Across from row indicates a change in that row.

Unitary Products Group
035-20353-001 Rev. B (0305) 4 of 8
Figure 1: 2-STAGE UPFLOW/HORIZONTAL NATURAL GAS FURNACES (80%)
FIG ITEM DESCRIPTION FC8T100C20UH11A FC8T120C16UH11A FC8T120C20UH11A LC8T100C20UH11A --- LC8T120C20UH11A
(5 BURNER) (6 BURNER) (6 BURNER)
MOTORS
*1MOTOR, DIRECT DRIVE BLOWER 024-23238-001 024-27540-000 024-23238-001
1 2 MOTOR,VENTOR ASS’Y 024-27653-000 024-27653-000 024-27653-000
ELECTRICAL
1 3 CAPACITOR, RUN (15MFD/370V) [RC] 024-20446-000 --- 024-20446-000
CAPACITOR, RUN (10MFD/370V) [RC] --- 024-20046-000 ---
1 4 CONTROL, HIGH LIMIT 025-29041-005 025-29041-005 025-29041-005
1 5 CONTROL,FURNACE [FC] 031-09117-000 031-09117-000 031-09117-000
1 6 IGNITER 025-32625-000 025-32625-000 025-32625-000
1,3 7SENSOR, FLAME 025-27773-000 025-27773-000 025-27773-000
1 8 SWITCH, AIR PRESSURE [1LP] 024-27657-001 024-27658-001 024-27658-001
1 9 SWITCH, DOOR [SW] 024-31943-000 024-31943-000 024-31943-000
*10 TRANSFORMER 025-30889-000 025-30889-000 025-30889-000
1,3 11 VALVE, GAS 025-35394-000 025-35394-000 025-35394-000
1,3 12 SWITCH, FLAME ROLL-OUT [ROS 3] 025-27747-018 025-27747-018 025-27747-018
312A CONTROL, Flame Roll Out(2ea) [ROS1,2] 025-27792-009 025-27792-009 025-27792-009
113 CONTROL, AUX. LIMIT (2 ea) [LS2,LS3] 025-30321-000 025-30321-000 025-30321-000
*14 FUSE (ATO 3) 025-32746-026 025-32746-026 025-32746-026
15
AIR MOVING
116 HOUSING, BLOWER 373-17829-001 373-17828-001 373-17829-001
117 WHEEL, BLOWER 026-19654-014 026-19654-005 026-19654-014
*17A CUTOFF, BLOWER 063-78006-000 --- 063-78006-000
NOTE: *Not Shown
New replacement parts shown in bold face type at the first printing of parts list dated 3/05.
Major components and suggested stocking items are shown with shaded item number.
“<“ Across from row indicates a change in that row.

Unitary Products Group
5 of 8 035-20353-001 Rev. B (0305)
Figure 2: 2-STAGE UPFLOW/HORIZONTAL NATURAL GAS FURNACES (80%)
FIG ITEM DESCRIPTION FC8T100C20UH11A FC8T120C16UH11A FC8T120C20UH11A LC8T100C20UH11A --- LC8T120C20UH11A
(5 BURNER) (6 BURNER) (6 BURNER)
FABRICATED PARTS
2 18 SHIELD, SECONDARY AIR 073-17404-005 073-17404-006 073-17404-006
*19 BAFFLE, FLUE 073-17775-003 073-17775-004 073-17775-004
2,3 20 BURNER, MAIN GAS 029-20482-000 029-20482-000 029-20482-000
2 21 BRACKET, IGNITER 073-17403-000 073-17403-000 073-17403-000
2 22 DECK, BLOWER (Rear) 073-12082-001 073-12082-001 073-12082-001
2 23 DECK, FRONT 073-17498-000 073-17498-000 073-17498-000
2 24 HEAT EXCHANGER ASS’Y 373-17477-010 373-17477-006 373-17477-006
2,3 25 MANIFOLD, GAS 029-22114-004 029-22114-005 029-22114-005
2 26 PANEL, FRONT ACCESS 373-19816-427 373-19816-427 373-19816-427
2 27 PAN, BASE 073-19816-090 073-19816-090 073-19816-090
2 28 PANEL, BLOWER ACCESS 373-19816-417 373-19816-417 373-19816-417
2 29 PANEL, TOP 073-19862-063 073-19862-063 073-19862-063
2 30 WRAPPER, INSULATED 373-19862-003 373-19862-003 373-19862-003
2 31 CHANNEL, TOE PLATE 073-19862-053 073-19862-053 073-19862-053
2 32 BRACKET, TOP DOOR 073-19862-073 073-19862-073 073-19862-073
2 33 BRACKET, BOTTOM DOOR 073-19862-077 073-19862-077 073-19862-077
*34 RACK, FILTER 026-38509-000 026-38509-000 026-38509-000
2 35 FRAME, SIDE BASE (2 Req’d) 073-19811-085 073-19811-085 073-19811-085
3 36 BRACKET, ROLL-OUT SWITCH 073-12033-000 073-12033-000 073-12033-000
3 37 ORIFICE, BURNER (Natural #45) 029-21182-045 029-21182-045 029-21182-045
2 38 PLATE, RESTRICTOR 073-17787-209 073-17489-256 073-17489-256
239 COLLAR, FLUE 073-17507-000 073-17507-000 073-17507-000
*40 LO-NOX SCREEN (L Models only) 026-35452-000 --- 026-35452-000
NOTE: *Not Shown
New replacement parts shown in bold face type at the first printing of parts list dated 3/05.
Major components and suggested stocking items are shown with shaded item number.
“<“ Across from row indicates a change in that row.

Unitary Products Group
035-20353-001 Rev. B (0305) 6 of 8
Figure 3: GAS CONTROLS
FIG ITEM DESCRIPTION FC8T100C20UH11A FC8T120C16UH11A FC8T120C20UH11A LC8T100C20UH11A --- LC8T120C20UH11A
(5 BURNER) (6 BURNER) (6 BURNER)
MISCELLANEOUS
*41 FILTER (.75 x 16 x 25) 026-38508-000 026-38508-000 026-38508-000
242 SIGHT GLASS, OVAL 025-38899-000 025-38899-000 025-38899-000
243 GASKET, RESTRICTOR PLATE 028-13283-000 028-13261-000 028-13261-000
244 TUBING, SILICONE 028-12499-000 028-12499-000 028-12499-000
45
*46 DIAGRAM, WIRING 035-19675-002 035-19675-002 035-19675-002
*47 HARNESS, MAIN WIRING 373-19870-011 373-19870-012 373-19870-012
*48 ISOLATOR, TUBE (3 Req’d) 028-09412-001 028-09412-001 028-09412-001
*49 ISOLATOR, WASHER (3 Req’d) 028-09412-002 028-09412-002 028-09412-002
*50 ISOLATOR,SLEEVE (3 Req’d) 028-09412-003 028-09412-003 028-09412-003
*51 MOUNT, MOTOR 026-31459-000 026-31480-000 026-31459-000
*52 GROMMET, 1/2” DIA. 025-30823-000 025-30823-000 025-30823-000
253 DOOR KNOB (4 Req’d) 026-39490-000 026-39490-000 026-39490-000
*54 RETAINER, DOOR KNOB (4 Req’d) 021-31394-000 021-31394-000 021-31394-000
*55 NUT, SELF THREADING (10 Req’d) 021-31395-000 021-31395-000 021-31395-000
*56 RETAINER, SQUARE 028-15190-000 028-15190-000 028-15190-000
NOTE: *Not Shown
New replacement parts shown in bold face type at the first printing of parts list dated 3/05.
Major components and suggested stocking items are shown with shaded item number.
“<“ Across from row indicates a change in that row.

Unitary Products Group
7 of 8 035-20353-001 Rev. B (0305)
FIELD INSTALLED ACCESSORIES- NON-ELECTRICAL
MODEL NO. DESCRIPTION USED WITH
1NP0580 PROPANE (LP) CONVERSION KIT ALL MODELS <
1SF0101 EXTERNAL SIDE FILTER RACK (6-PACK) ALL MODELS <
1BR0414 EXTERNAL BOTTOM RETURN FILTER RACK
WITH HIGH VELOCITY FILTER
ALL 14-1/2” (“A”) CABINETS <
1BR0417 ALL 17-1/2” (“B”) CABINETS <
1BR0421 ALL 21” (“C”) CABINETS <
1PS0313 HIGH ALTITUDE PRESSURE SWITCH KIT
(DOES NOT INCLUDE ORIFICES)
FOR APPLICATION
INFORMATION SEE
INSTRUCTIONS
1PS0314
FIELD INSTALLED ACCESSORIES- ELECTRICAL
MODEL NO. DESCRIPTION USED WITH
2TC03700124 TWINNING CONTROL ALL MODELS
6ET03700024 THERMOSTAT- Hardwired, 2 Heat/ 2 Cool. Programmable, auto
changeover. System Switch: Cool-Off-Heat. Fan Switch: Auto-On ALL MODELS
6ET03700124 THERMOSTAT- Hardwired, 1 Heat/ 1 Cool. Manual changeover.
System Switch: Cool-Off-Heat. Fan Switch: Auto-On ALL MODELS
6ET03700324 THERMOSTAT- Hardwired, 1 Heat/ 1 Cool. Programmable, auto
changeover. System Switch: Cool-Off-Heat. Fan Switch: Auto-On ALL MODELS
6ET03701024 THERMOSTAT- Power Stealing, 1 Heat/ 1 Cool. Programmable, auto
changeover. System Switch: Cool-Off-Heat. Fan Switch: Auto-On ALL MODELS
6ET03701224 THERMOSTAT- Power Stealing, 1 Heat/ 1 Cool. Manual changeover.
System Switch: Cool-Off-Heat. Fan Switch: Auto-On ALL MODELS
6ET0770010124 THERMOSTAT- Hardwired, 2 Heat/ 2 Cool. Programmable, auto
changeover. System Switch: Cool-Off-Heat. Fan Switch: Auto-On ALL MODELS

8 of 8
Subject to change without notice. Printed in U.S.A. 035-20353-001 Rev. B (0305)
Copyright © by York International Corp. 2005. All rights reserved. Supersedes: 035-20353-001 Rev. A (0504)
Unitary 5005 Norman
Products York OK
Group
Drive
73069
TO ORDER AUTHORIZED FACTORY REPLACEMENT PARTS - Contact your Source1 HVAC Parts Distributor or visit our
website at www.Source1Parts.com for a Distributor and Dealer listing.
NOTES