TECHNICAL GUIDE
Echelon
MODELS: FC8T/LC8T
GAS-FIRED
HIGH EFFICIENCY TWO STAGE
UPFLOW/HORIZONTAL FURNACES
STANDARD & LoNOx
80% AFUE
NATURAL GAS
60 - 120 MBH INPUT
EFFICIENCY
RATING
CERTIFIED
This product was manufactured
in a plant whose quality system
is certified/registered as being
in conformity with ISO 9001.
Due to continuous product improvement, specific ations
are subject to change without notice.
Visit us on the web at www.york.com for the most
up-to-date technical information.
Additional rating information can be found at
www.gamanet.org.
036-21603-002 Rev. A (1004)
DESCRIPTION
These high efficiency, compact units employ induced combustion, reliable hot surface ignition and high heat transfer
tubular heat exchangers. The units are factory shipped for
installation in upflow or horizontal applications.
These furnaces are designed for residential installation in a
basement, closet, alcove, attic, recreation room or garage
and are also ideal for commercial applications. All units are
factory assembled, wired and tested to assure safe dependable and economical installation and operation.
These units are Category I listed and may be common
vented with another gas appliance as allowed by the
National Fuel Gas Code.
WARRANTY
20-year limited warranty on the heat exchanger.
10-year heat exchanger warranty on commercial applications.
5-year limited parts warranty.
FEATURES
• Two stage heating operation includes:
- Two stage gas valve
- Two stage inducer operation
• Provides increased comfort level & very quiet unit operation
• Adjustable delay timer allows two stage operation with
single stage thermostat
• Compact, easy to install, ideal height 40" cabinet
• Blower-off delay for cooling SEER improvement.
• Easy to connect power/control wiring.
• Built-in, high level self diagnostics with fault code display.
• Low unit amp requirement for easy replacement applica-
tion.
• Integrated control module for reliable, economical opera-
tion.
• High velocity filter and side -return filter rack provided for
easy field installation.
• Electronic Hot Surface Ignition saves fuel cost with
increased dependability and reliability.
• Induced combustion system with inshot main burners for
quiet, efficient operation.
• 100% shut off main gas valve for extra safety.
• PSC -four speed, direct drive motor with large, quiet
blower.
• 24V, 40 VA control transformer and blower relay supplied
for add-on cooling.
• Hi-tech tubular aluminized steel primary heat exchanger.
• Timed on, adjustable off blower capability for maximum
comfort.
• Solid removable bottom panel allows easy application.
• Easy access from front of unit for cleaning, maintenance
or service.
• Insulated blower compartment for quiet operation.
• Independent door removal for greater durability and ease
of access.
• LoNOx models have been designed to meet specific code
requirements.
• LoNOx models may not be converted to propane.
FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE
036-21603-002 Rev. A (1004)
A
FRONT
BOTTOM IMAGE
RETURN END
CABINET AND DUCT DIMENSIONS
26-3/4
20
13-3/4
40
1-3/8
1-1/4
C
D
4” Diameter
GAS INLET
1-1/4 x 2-1/2
30-1/8
LEFT SIDE
20
24-3/4
TOP IMAGE
SUPPLY END
D
(VENT CONNECTIONS)
POWER WIRING
7/8” HOLE
2-1/2
32-1/2
ACCESS
WIRING
7/8” K.O.
16
8-3/4
T’STAT WIRING
7/8” K.O.
5/8
5/8
B
5-3/8
2
14-3/4
14
23-1/2
RIGHT SIDE
2-1/4
1-1/8
Model
BTUH Output
MBH ABCD
CFM Cabinet Size
Cabinet Dimension
(F,L)C8T060A12UH11 46/34 1200 A 14 1/2 13 1/4 10 1/8 10 1/8
(F,L)C8T080A12UH11 64/48 1200 A 14 1/2 13 1/4 10 1/8 10 1/8
(F,L)C8T080B16UH11 64/48 1600 B 17 1/2 16 1/4 13 1/8 11 5/8
FC8T100B12UH11 80/53 1200 B 17 1/2 16 1/4 13 1/8 11 5/8
(F,L)C8T100C20UH11 80/53 2000 C 21 19 3/4 16 5/8 13 3/8
FC8T120C16UH11 96/64 1600 C 21 19 3/4 16 5/8 13 3/8
(F,L)C8T120C20UH11 96/64 2000 C 21 19 3/4 16 5/8 13 3/8
HORIZONTAL VENTING - MUST USE FIELDS CONTROL MODELS SWG-4Y OR TJERENLAND MODEL GPAK-JT FIELD
SUPPLIED POWER VENTING KITS
High / Low
Fire Inputs
High / Low
Fire Outputs
Cabinet
Furnace
Airflow
BTU/H BTU/H Width CFM Feet Feet
60/42 46/34 A 1200 4 4.5 34.5
80/59 64/48 A 1200 4 4.5 34.5
80/59 64/48 B 1600 4 4.5 34.5
100/65 80/53 B 1200 4 4.5 34.5
100/65 80/53 C 2000 4 4.5 34.5
120/78 96/64 C 1600 4 4.5 34.5
120/78 96/64 C 2000 4 4.5 34.5
Pipe Size
Inches
Min. Vent Length Max. Vent Length
2 Unitary Products Group
RATINGS & PHYSICAL / ELECTRICAL DATA
036-21603-002 Rev. A (1004)
Model
Output Nominal
Cabinet
Width
AFUE
Air Temp. Rise
MBH CFM In. °F °F
(F,L)C8T060A12UH11
(F,L)C8T080A12UH11
(F,L)C8T080B16UH11
FC8T100B12UH11
(F,L)C8T100C20UH11
FC8T120C16UH11
(F,L)C8T120C20UH11
Model
(F,L)C8T060A12UH11
(F,L)C8T080A12UH11
(F,L)C8T080B16UH11
FC8T100B12UH11
(F,L)C8T100C20UH11
FC8T120C16UH11
(F,L)C8T120C20UH11
Annual Fuel Utilization Efficiency (AFUE) numbers are determined in accordance with DOE Test procedures.
Wire size and over current protection must comply with the National Electrical Code (NFPA-70-latest edition) and all local codes.
The furnace shall be installed so that the electrical components are protected from water.
46/34 1200 14-1/2 80.0 25-55 165
64/48 1200 14-1/2 80.0 30-60 175
64/48 1600 17 1/2 80.0 25-55 160
80/53 1200 17 1/2 80.0 25-55 170
80/53 2000 21 80.0 25-55 160
96/64 1600 21 80.0 25-55 180
96/64 2000 21 80.0 25-55 170
Output Blower
Blower
Size
MBH Hp Amps In. Amps LBS
Total
Unit
Max Over-current
Size (awg) @
75 ft.protect
46/34 1/3 6.2 10 x 7 9.0 20 14 107
64/48 1/3 6.2 10 x 7 9.0 20 14 119
64/48 3/4 11.5 11 x 8 12.0 20 14 129
80/53 1/2 7.0 10 x 8 12.0 20 14 131
80/53 1.0 12.2 11 x 10 14.0 20 12 149
96/64 1/2 10.4 10 x 10 12.0 20 14 149
96/64 1.0 12.2 11 x 10 14.0 20 12 151
FILTER SIZES
Cabinet Size Side (in) Bottom (in)
A 16 x 26 14 x 26
B 16 x 26 16 x 26
C (2) 16 x 26 20 x 26
D (2) 16 x 26 20 x 26
Min.
Wire
one way
Max. Outlet
Air Temp.
Operation
WGT.
* ESP (External Static Pressure) .5" WG is at furnace outlet ahead of cooling coil.
NOTES:
1. All filters must be high velocity cleanable type.
2. Air flows above 1800 CFM require either return from two sides or one side plus bottom.
Unitary Products Group 3
036-21603-002 Rev. A (1004)
TA BLE 1: Blower Performance CFM - Upflow (without filter) - Bottom Return
MODELS
Input /
CFM
Speed
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
High 1570 1490 1420 1340 1250 1180 1090 990 870 700
(F,L)C8T060A12UH11
Medium High 1410 1360 1310 1250 1190 1090 1020 920 810 650
Medium Low 1200 1180 1150 1100 1050 990 920 830 700 580
Low 960 960 950 930 900 840 800 720 610 500
High 1590 1520 1460 1380 1300 1240 1150 1050 930 800
(F,L)C8T080A12UH11
Medium High 1400 1360 1310 1260 1200 1140 1070 960 860 740
Medium Low 1180 1160 1130 1090 1040 990 920 840 750 640
Low 940 940 940 920 880 840 790 710 630 530
High 1850 1820 1790 1750 1690 1630 1570 1500 1430 1330
(F,L)C8T080B16UH11
Medium 1470 1450 1440 1430 1390 1360 1310 1270 1220 1150
Low 1260 1260 1260 1260 1250 1200 1150 1110 1070 1010
High 1700 1620 1560 1480 1390 1300 1210 1110 970 820
FC8T100B12UH11
Medium High 1430 1400 1350 1300 1230 1160 1080 980 870 710
Medium Low 1180 1170 1160 1130 1080 1030 1000 860 750 510
Low 950 950 930 920 880 840 790 720 620 530
High 2590 2500 2400 2280 2180 2080 1970 1840 1720 1560
(F,L)C8T100C20UH11
Medium High 2180 2120 2040 1980 1900 1810 1720 1600 1480 1320
Medium Low 1750 1720 1680 1640 1580 1520 1440 1350 1220 1060
Low 1450 1420 1380 1330 1300 1240 1160 1070 970 860
High 2020 1930 1820 1730 1640 1540 1400 1250 1090 920
FC8T120C16UH11
Medium 1750 1710 1650 1590 1490 1390 1290 1160 1010 810
Low 1540 1500 1460 1410 1350 1260 1180 1060 910 750
High 2500 2400 2320 2220 2110 2000 1870 1750 1610 1450
FC8T120C16UH11
Medium High 2130 2070 1990 1920 1840 1760 1660 1570 1460 1320
Medium Low 1700 1680 1650 1620 1560 1500 1410 1320 1210 1070
Low 1420 1390 1360 1330 1290 1240 1150 1060 950 840
NOTES
1. Airflow expressed in standard cubic feet per minute (CFM) and in cubic meters per minute (m3/min).
2. Motor voltage at 115 V.
* Input / CFM / Cabinet Width (A=14-1/2, B=17-1/2, C=21, D=24-1/2).
Two Stage Bottom Airflow Data (SCFM)
Ext. Static Pressure (in. H2O)
4 Unitary Products Group
TA BLE 2: Blower Performance CFM - Upflow (without filter) - Left Side Return
MODELS
Input /
CFM
Speed
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Two Stage Left Side Airflow Data (SCFM)
Ext. Static Pressure (in. H2O)
High 1770 1690 1630 1560 1490 1390 1290 1190 1050 920
(F,L)C8T060A12UH11
Medium High 1400 1380 1350 1320 1280 1230 1160 1060 930 780
Medium Low 1120 1130 1150 1130 1120 1080 1000 950 790 630
Low 880 900 900 900 880 850 790 730 660 530
High 1790 1720 1670 1590 1530 1450 1350 1260 1140 1000
(F,L)C8T080A12UH11
Medium High 1420 1370 1350 1320 1280 1230 1170 1090 990 840
Medium Low 1080 1120 1110 1100 1080 1040 1000 920 820 690
Low N/A 900 900 890 870 850 800 730 670 560
(F,L)C8T080B16UH11
High 2000 1960 1930 1900 1800 1760 1710 1640 1550 1460
Medium 1440 1440 1430 1420 1400 1380 1340 1300 1220 1150
Low 1220 1230 1230 1230 1200 1190 1170 1160 1110 1050
High 1780 1710 1640 1560 1490 1390 1290 1180 1030 820
FC8T100B12UH11
Medium High 1430 1410 1370 1340 1280 1220 1140 1040 890 730
Medium Low 1140 1170 1150 1120 1080 1040 970 890 760 630
Low 920 940 950 940 920 890 850 770 660 560
High 2770 2670 2610 2540 2450 2340 2210 2070 1890 1730
(F,L)C8T100C20UH11
Medium High 2120 2060 2030 2000 1950 1880 1810 1720 1580 1370
Medium Low 1690 1660 1630 1610 1560 1490 1420 1350 1240 1070
Low 1390 1370 1330 1290 1250 1200 1120 1010 910 850
High 2160 2070 1990 1900 1800 1690 1580 1430 1260 1000
FC8T120C16UH11
Medium 1760 1720 1690 1630 1560 1480 1390 1250 1080 890
Low 1510 1490 1470 1440 1380 1300 1210 1110 950 780
High 2740 2650 2560 2480 2380 2280 2170 1990 1840 1650
FC8T120C16UH11
Medium High 2120 2090 2040 2000 1940 1870 1780 1680 1550 1370
Medium Low 1690 1670 1650 1610 1560 1510 1440 1310 1160 1030
Low 1390 1360 1330 1300 1250 1190 1100 1020 940 840
NOTES
1. Airflow expressed in standard cubic feet per minute (CFM) and in cubic meters per minute (m3/min).
2. Return air is through side opposite motor (left side).
3. Motor voltage at 115 V.
* Input / CFM / Cabinet Width (A=14-1/2, B=17-1/2, C=21, D=24-1/2 ).
BLK
WHT
GRN
BLK (HOT)
WHT (NEUTRAL)
GRN
NOMINAL
120 VOLT
T’STAT
COMMON
CONNECTION
X/L
036-21603-002 Rev. A (1004)
R
W2
W1
G
C
Y2
Y1
TWO-STAGE
THERMOSTAT
INTEGRATED
CONTROL
OUTDOOR
UNIT
Y1
Y2
SINGLE STAGE
THERMOSTAT
Y
W1
R
G
C
T’STAT
COMMON
CONNECTION
Y1
Y2
Y
W1
W
W2
R
G
C
R
C
X/L
Field Wiring for Two Stage Thermostat
Field Wiring for Single Stage Thermostat
Unitary Products Group 5
036-21603-002 Rev. A (1004)
FILTER PERFORMANCE
The airflow capacity data published in the “Blower Performance” table listed above represents blower performance
WITHOUT filters. To determine the approximate blower performance of the system, apply the filter drop value for the filter being used or select an appropriate value from the “Filter
Performance” table shown below.
FILTER PERFORMANCE - PRESSURE DROP INCHES W.C.
NOTE: The filter pressure drop values in the “Fi l te r Perf or-
mance” table shown below are typical values for the type of
filter listed and should only be used as a guideline. Actual
pressure drop ratings for each filter type vary between filter
manufacturer.
Airflow
Range
Minimum Opening Size
Disposable WASHABLE FIBER* Pleated
1 Opening 2 Openings 1 Opening 2 Openings 1 Opening 2 Openings 1 Opening 2 Openings
Filter Type
CFM In³ In³ inwc inwc inwc inwc inwc inwc
0 - 750 230
0.01 0.01 0.15
751 - 1000 330 0.05 0.05 0.2
1001 - 1250 330 0.1 0.1 0.2
1251 - 1500 330 0.1 0.1 0.25
1501 - 1750 380 658 0.15 0.09 0.14 0.08 0.3 0.17
1751 - 2000 380 658 0.19 0.11 0.18 0.1 0.3 0.17
2001 & Above 463 658 0.19 0.11 0.18 0.1 0.3 0.17
* Washable fiber are the type supplied with furnace (if supplied).
APPLYING FILTER PRESSURE DROP TO
DETERMINE SYSTEM AIRFLOW
To determine the approximate airflow of the unit with a filter in place,
follow the steps below:
1. Select the filter type.
2. Select the number of return air openings or calculate the return
opening size in square inches to determine the proper filter
pressure drop.
3. Determine the External System Static Pressure (ESP) without
the filter.
4. Select a filter pressure drop from the table based upon the number of return air openings or return air opening size and add to
the ESP from Step 3 to determine the total system static.
5. If total system static matches a ESP value in the airflow table
(i.e. 0.20 w.c. (50 Pa), 0.60 w.c. (150 Pa), etc,) the system airflow corresponds to the intersection of the ESP column and
Model/Blower Speed row.
6. If the total system static falls between ESP values in the table
(i.e. 0.58 w.c. (144 Pa), 0.75 w.c. (187 Pa), etc.), the static pres-
Example: For a 130,000 BTUH (38.06 kW) furnace with 2 return
openings and operating on high-speed blower, it is found that total
system static is 0.58” w.c. To determine the system airflow, complete
the following steps:
Obtain the airflow values at 0.50 w.c. (125 Pa) & 0.60 w.c. (150 Pa)
ESP.
Airflow @ 0.50”: 2125 CFM (60.17 m
Airflow @ 0.60”: 2035 CFM (57.62 m
3
/min)
3
/min)
Subtract the airflow @ 0.50 w.c. (125 Pa) from the airflow @ 0.60
w.c. (150 Pa) to obtain airflow difference.
2035 - 2125 = -90 CFM (2.55 m
3
/min)
Subtract the total system static from 0.50 w.c. (125 Pa) and divide
this difference by the difference in ESP values in the table, 0.60 w.c.
(150 Pa) - 0.50 w.c. (125 Pa), to obtain a percentage.
(0.58 - 0.50) / (0.60 - 0.50) = 0.8
Multiply percentage by airflow difference to obtain airflow reduction.
(0.8) X (-90) = -72
Subtract airflow reduction value to airflow @ 0.50 w.c. (125 Pa) to
obtain actual airflow @ 0.58 inwc (144 Pa) ESP.
2125 - 72 = 2053
sure may be rounded to the nearest value in the table determining the airflow using Step 5 or calculate the airflow by using the
following example.
UNIT CLEARANCES TO COMBUSTIBLES (ALL DIMENSIONS IN INCHES)
(ALL SURFACES IDENTIFIED WITH THE UNIT IN AN UPFLOW CONFIGURATION)
APPLICATION
UPFLOW 1 6 0 0
UPFLOW B-VENT 1 3 0 0 0 1 COMBUSTIBLE YES YES YES NO
HORIZONTAL
HORIZONTAL B-VENT 0 3 0 1 0 1 COMBUSTIBLE NO YES YES
1 14-1/2” cabinet models only. All other units “0” clearance.
2 14-1/2” cabinet left airflow applications only. All other units and right hand airflow applications “0” clearance.
3 Line contact only permitted between lines formed by the intersection of th e r ear panel and side panel (top in horizontal position) of th e fu rnace jacket and building joists, studs or
framing.
TOP FRONT REAR LEFT SIDE RIGHT SIDE FLUE
In. In. In. In. (cm) In. (cm) In. (cm)
1
3
2
6 0 1 0 6 COMBUSTIBLE NO YES YES
3
6 COMBUSTIBLE YES YES YES NO
FLOOR/
BOTTOM
CLOSET ALCOVE ATTIC
LINE
CONTACT
3
YES
3
YES
6 Unitary Products Group
ACCESSORIES
PROPANE (LP) CONVERSION KIT 1NP0480 - All units
This accessory conversion kit may be used to convert natural
gas (N) units for propane (LP) operation. Conversions must
be made by qualified distributor or dealer personnel.
FIELD INSTALLED ACCESSORIES- ELECTRICAL
MODEL NO. DESCRIPTION USED WITH
2ET0770010124 THERMOSTAT-Two-stage Heat/ Cool, deluxe 24V ALL MODELS
2TH04701024
2ET07700424
2TC03700124 TWINNING CONTROL ALL MODELS
THERMOSTAT- Two-stage Heat/Cool, Auto or manual changeover.
System Switch: Heat-Off-Cool-Auto.
Fan Switch: On-Auto.
THERMOSTAT-Two-stage Heat/Cool. Programmabl e electronic (5+1+1),
Auto or manual changeover.
System Switch:Heat-Off-Cool-Auto. Fan Switch: Auto-On.
036-21603-002 Rev. A (1004)
EXTERNAL BOTTOM RETURN FILTER RACK W/FILTER -
Provides a cleanable, high velocity type filter and filter ra ck.
Attaches to the bottom of the furnace.
1BR0314 - For 14-1/2” cabinets
1BR0317 - For 17-1/2" cabinets
1BR0321 - For 21" cabinets
1BR0324 - For 24-1/2" cabinets
HIGH ALTITUDE PRESSURE SWITCHES -
Used to convert units for operation at altitudes from 4,500 ft.
to 10,000 ft.
Input
(MBH)
40 32 1PS0301 1PS0301
60 48 1PS0301 1PS0301
80 64 1PS0302 1PS0302
100 80 1PS0312 1PS0311
115 92 1PS0312 1PS0311
130 104 1PS0312 1PS0311
Output
(MBH)
2,000 Ft. to
5,500 Ft.
ALL MODELS
ALL MODELS
>5,500 Ft. to
0,000 Ft.
Unitary Products Group 7
NOTES
Subject to change without notice. Printed in U.S.A. 036-21603-002 Rev. A (1004)
Copyright © by York International Corp. 2004. All rights reserved. Supersedes: 036-21603-001 Rev. B (0904)
Unitary 5005 Norman
Products York OK
Group Drive 73069
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