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

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

DIMENSIONS

[736.9]

Ø7/8

[22.2]

ACCESSORY

5 15/16

[150.7]

28.39

[721.2]

Ø7/8

[22.2]

ACCESSORY

14 7/8

[337.3]

(BOTH SIDES)

Ø7/8

[22.2]

ACCESSORY

Ø7/8

[22.2]

ACCESSORY

Ø1 3/4

[44.5]

GAS ENTRY

Ø1/2

[12.7]

THERMOSTAT WIRE ENTRY

22 1/16

[560]

SIDE INLET

(BOTH SIDES)

11 7/16

[290.7]

9 11/16

[245.4]

[197.8]

7 13/16

Ø7/8

[22.2]

J.BOX PROVISION

Ø7/8

[22.2]

JUNCTION BOX

LOCATION

Ø1 3/4

[44.5]

GAS ENTRY

1 15/16

[49.2]

[25.4]

1 1/4

[31.8]

29 9/16

[750.7]

1 15/16

[49.2]

5 5/8

[143.3]

5 7/16

[138.5]

6 13/16

[172.3]

Ø1/2

[12.7]

THERMOSTAT WIRE ENTRY

[481.7]

OUTLET

21.6

[549.5]

BOTTOM INLET

33 1/4

[843.9]

9 9/16

[243.3]

3/4

[19.1]

5 7/8

[148.5]

3 7/16

[86.8]

9 7/8

[250.7]

27 3/4

[704.7]

2 5/16

[59]

FRONT OF CASING

TOP OF CASING

4 13/16

[122.2]

27 3/4

[704.7]

5 7/8

[148.5]

8 5/8

[219]

5 1/2

[140.3]

8 7/16

[213.5]

FRONT OF CASING

TOP OF CASING

6.1

[155.7]

2 1/16

[51.6]

5.1

[130.5]

1.7

[43.5]

Ø7/8

[22.2]

ACCESSORY (2)

AIR FLOW

BOTTOM RETURN

WIDTH

AIR FLOW

KNOCK OUTS FOR

VENTING(5

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

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

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

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

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

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

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

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

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