Carrier 58CTW Operation manual

58CTW/58CTY
PERFORMANCE™ 80 TWO---STAGE
V A R I A B L E --- S P E E D 4 --- W AY M U LT I P O I S E
INDUCED---COMBUSTION GAS FURNACE
Input Capacities: 45,000 thru 135,000 Btuh
Series 110
Product Data
Performance
A10249
THE PERFORMANCE 80 GAS FURNACE
The 58CTW/58CTY Two-Stage, Variable--speed, 4-way
Multipoise Gas Furnaces offer unmatched comfort in their class
with ComfortHeatttechnology in an 80% AFUE gas furnace.
You get the benefits of a ComfortHeatttechnology furnace:
reduced drafts, reduced sound levels, longer cycles, less
temperature swings between cycles, and less temperature
differences between rooms. Its exclusive, intelligent
microprocessor control adapts to the heating needs of the home by
automatically adjusting high and low heat times to maximize
comfort. The 58CTW/58CTY furnaces are approved for use with
natural or propane gas.
STANDARD FEATURES
SComfortHeattTechnology Intelligent microprocessor
control
STwo--stage heating with single-stage thermostat with
patented Adaptive Control Technology
SVery low operating sound through low--stage operation and
QuieTechtsystem
SSmartEvapt--Humidity control when using a
Thermidistattcontrol
SComfort Fantadjustable constant fan speed from the
thermostat
SMicroprocessor based control center
Enhanced diagnostics with LED and reflective sight glass
Stores fault codes during power outages
Adjustable heating air temperature rise
Adjustable cooling airflow
S4-way Multipoise furnace, 13 vent applications
SCompact design -- only 33-1/3 in. (847 mm) tall
SPower HeattIgniter
SDraft Safeguard switch to ensure proper furnace venting
SInsulated blower compartment
SInner door for tighter sealing
SCertified to leak 2 percent or less of its nominal air
conditioning CFM delivered when pressurized to 1--In.
Water Gauge with all present air inlets and air outlets sealed.
SHYBRID HEATrDual Fuel System compatible
SAll models are Chimney Friendly when used with accessory
vent kit
SVariable-speed ECM blower motor
Increased SEER ratings for AC and HP systems as compared to
the Air Conditioning Heating and Refrigeration Institute’s
standard coil--only rating when paired with selected Carrier
evaporator coils.
Perfectly matches CFM to cooling system at all static points
SResidential installations eligible for consumer financing
through the Retail Credit Program

2
FURNACE COMPONENTS
INDUCER MOTOR
ASSEMBLY
PRESSURE
SWITCHES
FLUE COLLECTOR
BOX
GAS VALVE
HOT SURFACE
IGNITOR
BLOWER DOOR
SAFETY SWITCH
FURNACE CONTROL
BOARD
VENT
ELBOW
MAIN LIMIT SWITCH
(BEHIND GAS VALVE)
BLOCKED VENT
SWITCH
FLAME
SENSOR
GAS MANIFOLD
GAS BURNER
BLOWER AND
MOTOR
MANUAL RESET
LIMIT SWITCHES
CAPACITOR/
POWER CHOKE
A10312
NOTE: The 58CTW/58CTY Furnaces are factory shipped for use with natural gas. These furnaces can be field-converted for propane gas
with a factory-authorized and listed accessory conversion kit.
58CTW/CTY

3
DIMENSIONS
A
A
B
[736.9]
[736.9]
29
29
Ø7/8
Ø7/8
[22.2]
[22.2]
ACCESSORY
ACCESSORY
5 15/16
5 15/16
[150.7]
[150.7]
28.39
28.39
[721.2]
[721.2]
Ø7/8
Ø7/8
[22.2]
[22.2]
ACCESSORY
ACCESSORY
14 7/8
14 7/8
[337.3]
[337.3]
(BOTH SIDES)
(BOTH SIDES)
Ø7/8
Ø7/8
[22.2]
[22.2]
ACCESSORY
ACCESSORY
Ø7/8
Ø7/8
[22.2]
[22.2]
ACCESSORY
ACCESSORY
Ø1 3/4
Ø1 3/4
[44.5]
[44.5]
GAS ENTRY
GAS ENTRY
Ø1/2
Ø1/2
[12.7]
[12.7]
THERMOSTAT WIRE ENTRY
THERMOSTAT WIRE ENTRY
22 1/16
22 1/16
[560]
[560]
SIDE INLET
SIDE INLET
(BOTH SIDES)
(BOTH SIDES)
11 7/16
11 7/16
[290.7]
[290.7]
9 11/16
9 11/16
[245.4]
[245.4]
[197.8]
[197.8]
7 13/16
7 13/16
Ø7/8
Ø7/8
[22.2]
[22.2]
J.BOX PROVISION
J.BOX PROVISION
Ø7/8
Ø7/8
[22.2]
[22.2]
JUNCTION BOX
JUNCTION BOX
LOCATION
LOCATION
Ø1 3/4
Ø1 3/4
[44.5]
[44.5]
GAS ENTRY
GAS ENTRY
1 15/16
1 15/16
[49.2]
[49.2]
1
[25.4]
[25.4]
1 1/4
1 1/4
[31.8]
[31.8]
29 9/16
29 9/16
[750.7]
[750.7]
1 15/16
1 15/16
[49.2]
[49.2]
5 5/8
5 5/8
[143.3]
[143.3]
5 7/16
5 7/16
[138.5]
[138.5]
6 13/16
6 13/16
[172.3]
[172.3]
Ø1/2
Ø1/2
[12.7]
[12.7]
THERMOSTAT WIRE ENTRY
THERMOSTAT WIRE ENTRY
19
19
[481.7]
[481.7]
OUTLET
OUTLET
D
21.6
21.6
[549.5]
[549.5]
BOTTOM INLET
BOTTOM INLET
C
33 1/4
33 1/4
[843.9]
[843.9]
9 9/16
9 9/16
[243.3]
[243.3]
3/4
3/4
[19.1]
[19.1]
5 7/8
5 7/8
[148.5]
[148.5]
3 7/16
3 7/16
[86.8]
[86.8]
9 7/8
9 7/8
[250.7]
[250.7]
27 3/4
27 3/4
[704.7]
[704.7]
2 5/16
2 5/16
[59]
[59]
FRONT OF CASING
FRONT OF CASING
TOP OF CASING
TOP OF CASING
4 13/16
4 13/16
[122.2]
[122.2]
27 3/4
27 3/4
[704.7]
[704.7]
5 7/8
5 7/8
[148.5]
[148.5]
8 5/8
8 5/8
[219]
[219]
5 1/2
5 1/2
[140.3]
[140.3]
8 7/16
8 7/16
[213.5]
[213.5]
FRONT OF CASING
FRONT OF CASING
TOP OF CASING
TOP OF CASING
6.1
6.1
[155.7]
[155.7]
2 1/16
2 1/16
[51.6]
[51.6]
5.1
5.1
[130.5]
[130.5]
1.7
1.7
[43.5]
[43.5]
Ø7/8
Ø7/8
[22.2]
[22.2]
ACCESSORY (2)
ACCESSORY (2)
AIR FLOW
AIR FLOW
AIR FLOW
AIR FLOW
BOTTOM RETURN
BOTTOM RETURN
WIDTH
WIDTH
AIR FLOW
AIR FLOW
KNOCK OUTS FOR
KNOCK OUTS FOR
VENTING(5
VENTING(5
PLACES)
PLACES)
A10270
NOTES:
1. Two additional 7/8---in. (22 mm) diameter holes are located in the top plate.
2. Minimum return---air openings at furnace, based on metal duct. If flex duct is used, see flex duct manufacturer’s recommendations for equivalent diameters.
a. For 800 CFM---16 ---in. (406 mm) round or 14 1/2 x 12 ---in. (368 x 305 mm) rectangle.
b. For 1200 CFM---20---in. (508 mm) round or 14 1/2 x 19 1/2---in. (368 x 495 mm) rectangle.
c. For 1600 CFM---22---in. (559 mm) round or 14 1/2 x 22 1/16---in. (368 x 560mm) rectangle.
d. For airflow requirements above 1800 CFM, see Air Delivery table in Product Data literature for specific use of single side inlets. The use of both sideinlets,
a combination of 1 side and the bottom, or the bottom only will ensure adequate return air openings for airflow requirements above 1800 CFM.
A B C D
FURNACE
SIZE
CABINET
WIDTH
OUTLET
WIDTH
TOP AND
BOTTOM FLUE
COLLAR
BOTTOM
INLET WIDTH
VENT
CONNECTION
SIZE
SHIP WT. LB
(KG)
ACCESSORY
FILTER MEDIA
CABINET SIZE
045---12 14-3/16 (360) 12-9/16 (319) 9-5/16 (237) 12---11/16 (322) 4 (102) 107 (49) 16 (406)
070---16 17---1/2 (445) 15-7/8 (403) 11-9/16 (294) 16 (406) 4 (102) 126 (57) 16 (406)
090---16 21 (533) 19-3/8 (492) 13-5/16 (338) 19 ---1/2 (495) 4 (102) 140 (64) 20 (506)
110---22 21 (533) 19-3/8 (492) 13-5/16 (338) 19 ---1/2 (495) 4 (102) 152 (69) 20 (506)
135---22 24-1/2 (622) 22-7/8 (581 15-1/16 (383) 23 (584) 4 (102) 163 (74) 24 (610)
*135 size furnaces require a 5 or 6---in. (127 or 152 mm) vent. Use a vent adapter between furnace and vent stack. See Installation Instructions for complete
installation requirements.
EXAMPLE OF MODEL NUMBER NOMENCLATURE
58CTW 045 100 08
58CTW Two-Stage 4-Way Multipoise
Nominal Cooling Size
(Airflow at .5 e.s.p.)
(400 CFM per 12,000 Btuh)
12--- 1200 CFM
Input Capacity 16--- 1600 CFM
045--- 44,000 Btuh 110--- 110,000 Btuh 22--- 2200 CFM
070--- 66,000 Btuh 135--- 132,000 Btuh 100
090--- 88,000 Btuh Series Number
58CTW/CTY

4
SPECIFICATIONS
UNIT SIZE 045-- 12 070--16 090 -- 16 110--22 135-- 22
RATINGS AND PERFORMANCE
Input Btuh*
Nonweatherized ICS All 58CTW; 58CTY Upflow
High 44,000 66,000 88,000 110,000 132,000
Low 29,000 43,500 58,000 72,500 87,000
Input Btuh*
Nonweatherized ICS
All 58CTY Downflow/
Horizontal
High 42,000 63,000 84,000 105,000 126,000
Low 29,000 43,000 58,000 72,500 87,000
Output Capacity (Btuh)†
Nonweatherized ICS All 58CTW; 58CTY Upflow
High 35,000 53,000 71.000 89,000 107,000
Low 23,000 35,000 47,000 59,000 70,000
Output Capacity (Btuh)†
Nonweatherized ICS
All 58CTY Downflow/
Horizontal
High 34,000 51,000 68.000 85,000 102,000
Low 23,000 35,000 47,000 59,000 70,000
AFUE† 80.0 80.0 80.0 80.0 80.0
Certified Temperature Rise Range --- ° F (° C)
High 30-60
( 1 7 --- 3 3 )
25-55
( 1 4 --- 3 0 )
30-60
( 1 7 --- 3 3 )
30-60
( 1 7 --- 3 3 )
40-70
( 2 2 --- 3 9 )
Low 20-50
( 1 1 --- 2 8 )
15-45
( 8 --- 2 5 )
25-55
( 1 4 --- 3 0 )
20-50
( 1 1 --- 2 8 )
25-55
( 1 4 --- 3 0 )
Certified External Static Pressure Heat/Cool 0.10/0.50 0.12/0.50 0.15/0.50 0.20/0.50 0.20/0.50
Airflow CFM‡
Heating High/Low 820/725 1570/1045 1265/1030 1555/1295 1865/1640
Cooling 1175 1685 1770 2230 2290
ELECTRICAL
U n i t Vo l t s --- He r t z --- P h a s e 115-60-1
Operating Voltage Range Min-Max 104-127
Maximum Unit Amps 8.0 9.6 10.2 13.0 13.0
Maximum Wire Length (Measure 1 Way in Ft. (M)) 34 (10.4) 28 (8.5) 27 (8.2) 34 (10.4) 34 (10.4)
Minimum Wire Size 14 12
MaximumFuseorCktBkrSize(Amps)** 15 20
Transformer (24v) 40va
External Control Heating 12va
Power Available Cooling 35va
Air Conditioning Blower Relay Standard
CONTROLS
Limit Control SPST
Heating Blower Control Solid-State Time Operation
Burners (Monoport) 23456
Gas Connection Size 1/2-in. NPT
GAS CONTROLS
Gas Valve
(Redundant)
Mfr. White-Rodgers
Min. inlet pressure (In. W.C.) 4.5 (Natural Gas)
Max. inlet pressure (In. W.C.) 13.6 (Natural Gas)
Ignition Device Hot Surface
Factory-installed orifice Size 43
BLOWER DATA
Direct-Drive Motor HP (ECM) 1/2 3/4 3/4 1 1
Motor Full Load Amps 6.8 8.4 8.4 10.9 10.9
RPM (Nominal) 1200
Blower Wheel Diameter x Width --- In. (mm) 10 x 6
(254x152)
11 x 8
(279x203)
10 x 10
(254x254)
11 x 11
(279x279)
11 x 11
(279x279)
* Gas input ratings are certified for elevations to 2000 ft. (610 M). For elevations above 2000 ft. (610 M), reduce ratings 4 percent for each 1000 ft. (305M)
above sea level. Refer to National Fuel Gas Code NFPA 54/ANSI Z223.1 ---2012 Table F.4 or furnace installation instructions.
† Capacity in accordance with U.S. Government DOE test procedures.
‡ Airflow shown is for bottom only return-air supply for the as-shipped speed tap. For air delivery above 1800 CFM, see Air Delivery table for other options. A
filter is required for each return-air supply. An airflow reduction of up to 7 percent may occur when using the factory-specified 4-5/16 in. (110 mm) wide, high
efficiency media filter.
** Time---delay type is recommended.
ICS Isolated Combustion System
58CTW/CTY

5
CARRIER ACCESSORIES
58CTW/58CTY DESCRIPTION PART NO. 045-12 070-16 090-16 110-22 135-22
Media Filter Cabinet
FILCABXL0016 X X
FILCABXL0020 X X
FILCABXL0024 X
Cartridge Media Filter
FILCCCAR0016 X X
FILCCCAR0020 X X
FILCCCAR0024 X
EZ Flex Media Filter with End Caps
EXPXXUNV0016 X X
EXPXXUNV0020 X X
EXPXXUNV0024 X
Replacement EZ Flex Filter Media
EXPXXFIL0016 X X
EXPXXFIL0020 X X
EXPXXFIL0024 X
External Bottom Return Filter Rack
KGBFR0401B14 X
KGBFR0501B17 X
KGBFR0601B21 X X
KGBFR0701B24 X
External Side Return Filter Rack KGAFR0201ALL XXXXX
Unframed Filter 3/4-in. (19 mm)
KGAWF1306UFR† X X
KGAWF1406UFR X X
KGAWF1506UFR X
Flue Extension KGAFE0112UPH XXXXX
Combustible Floor Base KGASB0201ALL XXXXX
Downflow Vent Guard KGBVG0101DFG XXXXX
Vent Extension Kit KGAVE0101DNH XXXXX
Chimney Adapter Kit
KGACA02014FC XXXX
KGACA02015FC X
Natural-to-Propane Conversion Kit* KGCNP5201VSP XXXXX
Propane-to-Natural Conversion Kit KGCPN4401VSP XXXXX
Twinning Kit KGATW0801HSI X X X
Gas Orifice
LH32DB207
See Installation Instructions for model, altitude, and heat value usages
LH32DB202
LH32DB200
LH32DB205
LH32DB208
LH32DB078
LH32DB076
LH32DB203
LH32DB201
LH32DB206
LH32DB209
LH32DB210
* Factory-authorized and field installed. Fuel conversion kits are CSA (formerly AGA/CGA) recognized.
† Suitable for Side Return Filter Rack
X = Accessory
S=Standard
58CTW/CTY

6
CARRIER ACCESSORIES
Accessories
ELECTRONIC AIR CLEANER (EAC) Model EACB
MECHANICAL AIR CLEANER Models EZXCAB, FILCAB
HUMIDIFIER Model HUM
HEAT RECOVERY VENTILATOR Model HRV
ENERGY RECOVERY VENTILATOR Model ERV
T H E R M O S T A T ---
NON---PROGRAMMABLE
Fo r u s e w i t h 1 --- s p e e d A i r C o n d i t i o n e r --- d e g . F / C , A u t o C h a n g e o v e r --- T P --- N A C , T C --- NA C
Fo r u s e w i t h 1 --- s p e e d H e a t P u m p --- d e g . F / C , A u t o C h a n g e o v e r --- T P --- N H P, T C --- N HP *
Fo r u s e w i t h 2 --- s p e e d A i r C o n d i t i o n e r --- d e g . F / C , A u t o C h a n g e o v e r --- T P --- N R H *
For use with multi---use / stage configurations --- deg. F/C, Auto Changeover/Temperature and Humidity control
--- T P --- P R H †
T H E R M O S T A T ---
PROGRAMMABLE
Fo r u s e w i t h 1 --- s p e e d A i r C o n d i t i o n e r --- d e g . F / C , A u t o C h a n g e o v e r, 7 --- D a y P r o gr a m m a b l e --- T P --- P A C
Fo r u s e w i t h 1 --- s p e e d H e a t P u m p --- d e g . F / C , A u t o C h a n g e o v e r, 7 --- D a y P r o g r a m m a b l e --- T P --- P H P *
Fo r u s e w i t h 2 --- s p e e d A i r c o n d i t i o n e r --- d e g . F / C , A u t o C h a n g e o v e r, 7 --- D a y P r o gr a m m a b l e --- T P --- P R H *
F o r u s e w i t h 1 --- s p e e d A i r C o n d i t i o n e r --- d e g . F / C , 5 --- 2 D a y P r o g r a m m a b l e --- T P --- PA C
Fo r u s e w i t h m u l t i --- s t a g e a p p l i ca t i o n s --- d e g. F / C , A u t o C h a n g e o v e r, 7 --- D a y P r o gr a m m a b l e --- T C --- P R H †
Fo r m u l t i --- u s e / s t a g e c o n f i g u ra t i o n s --- d e g . F / C, A u t o C h a n ge o v e r, 7 --- D a y P r o gr a m m a b le / Te m p e r a t u re a n d
H u m i d i t y C o n t r o l --- T P --- P R H †
* Model HP and 2S thermostat must be field converted to air conditioner operation.
† Thermidistat Control can be configured for multiple use and staging, it must be configured for each specific application.
TYPICAL WIRING SCHEMATIC
A95236
58CTW/CTY

7
A02058
SEE NOTES: 1,2,4,7,8,9
UPFLOW
SEE NOTES: 1,2,3,4,7,8,9
UPFLOW
SEE NOTES: 1,2,4,5,7,8,9
DOWNFLOW
A02059 A02061
SEE NOTES:1,2,3,4,5,7,8,9
DOWNFLOW
SEE NOTES: 1,2,3,4,5,7,8,9
DOWNFLOW
SEE NOTES: 1,2,4,5,6,7,8,9
DOWNFLOW
A02060 A02063 A02062
Venting Notes
1. For common vent, vent connector sizing and vent material: United States, latest edition of the National Fuel Gas
Code (NFGC), ANSI Z223.1/NFPA 54.
2. Immediately increase to 5-in. (127 mm) vent connector outside furnace casing when 5-in. (127 mm) vent connector
required, refer to Note 1.
3. Side outlet vent for upflow and downflow installations must use Type B vent immediately after exiting the furnace,
except when Downflow Vent Guard is used in downflow position.
4. Type B vent where required, refer to Note 1.
5. 4---in. (102 mm) single wall vent must be used inside furnace casing and the Downflow Vent Guard Kit.
6. Accessory Downflow Vent Guard Kit, required in downflow installations with bottom vent configuration.
7. Chimney Adapter Kit required for exterior masonry chimney applications. Refer to Chimney Adapter Kits for sizing
and complete application details.
8. Secure vent connector to furnace elbow with (2) corrosion-resistant sheet metal screws, space approximately 180°
apart.
9. Secure all other single wall vent connector joints with (3) corrosion-resistant screws spaced approximately 120°
apart. Secure Type B vent connectors per vent connector manufacturer’s recommendations.
58CTW/CTY

8
SEE NOTES: 1,2,4,5,7,8,9
HORIZONTAL RIGHT
A02068
SEE NOTES: 1,2,4,5,7,8,9
HORIZONTAL RIGHT
A02070
SEE NOTES: 1,2,4,7,8,9
HORIZONTAL RIGHT A02069
SEE NOTES: 1,2,4,7,8,9
HORIZONTAL LEFT A02064
SEE NOTES: 1,2,4,5,7,8,9
HORIZONTAL LEFT A02065
SEE NOTES: 1,2,4,5,7,8,9
HORIZONTAL LEFT
A02066
SEE NOTES: 1,2,4,5,7,8,9
HORIZONTAL LEFT
A02067
58CTW/CTY

9
AIR DELIVERY—CFM (With Filter)*
COOLING4AND HEATING AIR DELIVERY - CFM (Bottom Return5With Filter)
(SW1-5 and SW2-2 set to OFF, except as indicated. See notes 1 and 2.)
Unit Size Cooling Switch Settings External Static Pressure (ESP)
SW2-8 SW2-7 SW2-6 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
045-12
OFF OFF OFF 1190 1140 1100 1065 1020 985 905 800 665 525
OFF OFF ON 620 560 520 455 410 355 305 255 See note 4
OFF ON OFF 795 755 705 670 615 585 530 490 440 405
OFF ON ON 1020 955 930 890 840 805 755 715 645 490
ON OFF OFF 1190 1140 1100 1065 1020 985 905 800 665 525
ON OFF ON 1455 1390 1325 1255 1175 1085 1000 880 755 575
ON ON OFF 1455 1390 1325 1255 1175 1085 1000 880 755 575
ON ON ON 1455 1390 1325 1255 1175 1085 1000 880 755 575
Maximum Clg Airflow21455 1390 1325 1255 1175 1085 1000 880 755 575
High Heat Airflow3915 860 825 790 735 700 650 610 550 450
Low Heat Airflow3780 730 685 635 585 545 495 450 400 370
Unit Size Cooling Switch Settings External Static Pressure (ESP)
SW2-8 SW2-7 SW2-6 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
070-16
OFF OFF OFF 1615 1570 1530 1490 1450 1405 1365 1325 1280 1210
OFF OFF ON 640 See note 4
OFF ON OFF 840 775 700 640 See note 4
OFF ON ON 1045 980 920 860 805 750 690 640 See note 4
ON OFF OFF 1220 1175 1120 1075 1025 970 925 875 820 775
ON OFF ON 1390 1335 1290 1245 1200 1155 1105 1055 1015 970
ON ON OFF 1615 1570 1530 1490 1450 1405 1365 1325 1280 1210
ON ON ON 1890 1850 1810 1750 1685 1615 1545 1475 1395 1275
Maximum Clg Airflow21890 1850 1810 1750 1685 1615 1545 1475 1395 1275
High Heat Airflow31540 1490 1450 1410 1365 1320 1275 1235 1190 1140
Low Heat Airflow31370 1320 1275 1225 1180 1135 1085 1040 995 950
Unit Size Cooling Switch Settings External Static Pressure (ESP)
SW2-8 SW2-7 SW2-6 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
090-16
OFF OFF OFF 1625 1580 1535 1490 1445 1390 1325 1215 1070 910
OFF OFF ON 555 See note 4
OFF ON OFF 845 770 670 595 See note 4
OFF ON ON 1010 950 880 790 725 670 580 See note 4
ON OFF OFF 1210 1155 1105 1035 970 910 850 800 730 660
ON OFF ON 1405 1360 1305 1255 1185 1130 1070 1015 960 875
ON ON OFF 1625 1580 1535 1490 1445 1390 1325 1215 1070 910
ON ON ON 2095 2010 1935 1855 1770 1675 1540 1300 1120 940
Maximum Clg Airflow22095 2010 1935 1855 1770 1675 1540 1300 1120 940
High Heat Airflow31735 1685 1630 1580 1520 1455 1375 1235 1085 915
Low Heat Airflow3780 730 685 635 585 545 495 450 400 370
58CTW/CTY

10
AIR DELIVERY—CFM (With Filter)* (Continued)
Unit Size Cooling Switch Settings External Static Pressure (ESP)
SW2-8 SW2-7 SW2-6 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
110-22
OFF OFF OFF 2055 2000 1950 1900 1840 1790 1740 1675 1625 1565
OFF OFF ON 855 755 See note 4
OFF ON OFF 1060 985 875 800 700 See note 4
OFF ON ON 1250 1180 1095 1025 925 860 775 715 See note 4
ON OFF OFF 1445 1380 1320 1235 1175 1100 1035 955 900 825
ON OFF ON 1685 1630 1560 1505 1445 1375 1320 1265 1195 1140
ON ON OFF 2055 2000 1950 1900 1840 1790 1740 1675 1625 1565
ON ON ON 2465 2415 2365 2305 2230 2140 2045 1925 1805 1655
Maximum Clg Airflow22465 2415 2365 2305 2230 2140 2045 1925 1805 1655
High Heat Airflow32105 2055 2005 1955 1895 1850 1795 1735 1665 1580
Low Heat Airflow31740 1685 1620 1560 1505 1440 1385 1325 1260 1205
Unit Size Cooling Switch Settings External Static Pressure (ESP)
SW2-8 SW2-7 SW2-6 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
135-22
OFF OFF OFF 2040 1985 1930 1880 1830 1775 1715 1660 1595 1510
OFF OFF ON 850 740 See note 4
OFF ON OFF 1040 960 865 755 See note 4
OFF ON ON 1245 1170 1080 1005 920 835 750 See note 4
ON OFF OFF 1450 1385 1305 1245 1180 1085 1015 935 880 805
ON OFF ON 1670 1605 1540 1480 1425 1350 1280 1220 1135 1070
ON ON OFF 2040 1985 1930 1880 1830 1775 1715 1660 1595 1510
ON ON ON 2520 2455 2405 2350 2290 2195 2090 1965 1815 1615
Maximum Clg Airflow22520 2455 2405 2350 2290 2195 2090 1965 1815 1615
High Heat Airflow32260 2205 2150 2100 2045 1985 1925 1855 1745 1600
Low Heat Airflow32005 1950 1895 1845 1790 1735 1675 1620 1550 1475
1. Nominal 350 CFM/ton cooling airflow is delivered with SW1-5 and SW2-2 set to OFF.
Set both SW1-5 and SW2-2 to ON for +7% airflow (nominal 370 CFM/ton).
Set SW1-5 to ON and SW2-2 to OFF for +15% airflow (nominal 400 CFM/ton).
Set SW2-2 to ON and SW1-5 to OFF for -7% airflow (nominal 325 CFM/ton).
2. Maximum cooling airflow is achieved when switches SW2-6, SW2-7, SW2-8 and SW1-5 are set to ON, and SW2-2 is set to OFF.
3. All heating CFM's are when low heat rise adjustment switch (SW1-3) and comfort/efficiency adjustment switch (SW1-4) are both set to
OFF
4. Ductwork must be sized for high-heating CFM within the operational range of ESP. Operation within the blank areas of the chart is not
recommended because high-heat operation will be above 1.0 ESP.
5. All airflows on 21" casing size furnaces are 5% less on side return only installations.
6. Side returns for 24.5" casing sizes require two sides, or side and bottom, to allow sufficient airflow at the return of the furnace.
58CTW/CTY