GOODMAN GHS80704AXC Technical Manual

TECHNICAL MANU AL

GDS8 & GHS8

33-3/8" 80% Gas Furnace Units

• Refer to Service Manual RS6610004 for installation, operation, and troubleshooting information.

• All safety information must be followed as provided in the Service Manual.

• Refer to the appropriate Parts Catalog for part number information.

• Model numbers listed on page 3.

This manual is to be used by qualified, professionally trained HVAC technicians only.

Goodman does not assume any responsibility for property damage or personal injury due to improper service procedures or services performed by an unqualified person.

RT6622011

September 2009

Copyright © 2009 Goodman Manufacturing Company, L.P.

Copyright © 2005-2007 Goodman Manufacturing Company, L.P.

PRODUCT IDENTIFICATION

The model and manufacturing number are used for positive identification of component parts used in manufacturing. Please use these numbers when requesting service or parts information.

G D S 8 045 3 A X C A

BRAND:

G: Goodman

Brand

®

AIRFLOW DIRECTION

D: Dedicated Downflow

H: High Airflow

FURNACE

TYPE

S: Single Stage/

Multi-speed

AFUE:

8: 80%

NOMINAL INPUT:

045: 45,000 Btuh

070: 70,000 Btuh

090: 70,000 Btuh

115: 115,000 Btuh

MAJOR

REVISION:

AIRFLOW

CAPABILITY:

3: 1200

4: 1600

5: 2000

ADDITIONAL

FEATURES:

N: Natural Gas

X: Low NOx

CABINET WIDTH:

A: 14"

B: 17 1/2"

C: 21"

MINOR

REVISION:

HIGH VOLTAGE!

Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.

2

Goodman will not be responsible for any injury or property damage arising from improper service or service procedures. If you install or perform service on this unit, you assume responsibility for any personal injury or property damage which may result. Many jurisdictions require a license to install or service heating and air conditioning equipment.

Installation and repair of this unit should be performed ONLY by individuals meeting the requirements of an "entry level technician" as specified by the Air-Conditioning, Heating, and Refrigeration Institute (AHRI). Attempting to install or repair this unit without such background may result in product damage, personal injury or death.

PRODUCT IDENTIFICATION

The model and manufacturing number are used for positive identification of component parts used in manufacturing.

Please use these numbers when requesting service or parts information.

GDS80453AXC*

GDS80703AXC*

GDS80904BXC*

GDS81155CXC*

GHS80453AXC*

GHS80704AXC*

GHS81155CXC*

* These models available in Low NOx

The United States Environmental Protection Agency (“EPA”) has issued various regulations regarding the introduction and disposal of refrigerants introduced into this unit. Failure to follow these regulations may harm the environment and can lead to the imposition of substantial fines.

These regulations may vary by jurisdiction. Should questions arise, contact your local EPA office.

Do not connect or use any device that is not design certified by

Goodman for use with this unit.

Serious property damage, personal injury, reduced unit performance and/or hazardous conditions may result from the use of such non-approved devices.

To prevent the risk of property damage, personal injury, or death, do not store combustible materials or use gasoline or other flammable liquids or vapors in the vicinity of this appliance.

3

4

PRODUCT DESIGN

General Operation

The G*S8 furnaces are equipped with an electronic ignition device used to light the burners and an induced draft blower to exhaust combustion products.

An interlock switch prevents furnace operation if the inner blower door is not in place. Keep the blower access door in place except for inspection and maintenance. (See illustra- tion on pages 5 and 6.)

This furnace is also equipped with a self-diagnosing electronic control module. In the event a furnace component is not operating properly, the control module LED will flash on and off in a factory-programmed sequence, depending on the problem encountered. This light can be viewed through the observation window in the blower access door. Refer to the Troubleshooting Chart for further explanation of the LED codes and Abnormal Operation - Integrated Ignition Control section in the Service Instructions for an explanation of the possible problem.

The rated heating capacity of the furnace should be greater than or equal to the total heat loss of the area to be heated.

The total heat loss should be calculated by an approved method or in accordance with “ASHRAE Guide” or “Manual

J-Load Calculations” published by the Air Conditioning Contractors of America.

*Obtain from: American National Standards Institute 1430

Broadway New York, NY 10018

Location Considerations

• The furnace should be as centralized as is practical with respect to the air distribution system.

• Do not install the furnace directly on carpeting, tile, or combustible material other than wood flooring.

• When installed in a residential garage, the furnace must be positioned so the burners and ignition source are located not less than 18 inches (457 mm) above the floor and protected from physical damage by vehicles.

Notes:

NFPA 54/ANSI Z223.1 - latest edition. In Canada, the furnaces must be vented in accordance with the National Standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2 latest editions and amendments.

NOTE: The vertical height of the Category I venting system must be at least as great as the horizontal length of the venting system.

Accessibility Clearances (Minimum)

Unobstructed front clearance of 24" for servicing is recommended.

MINIMUM CLEARANCE TO COMBUSTIBLE MATERIALS - INCHES

Vent

Sides Rear Front* Top

1 0 3

SW

6

B

1 1

* 24" clearance for serviceability recommended.

** Single Wall Vent (SW) to be used only as a connector.

Refer to the venting tables outlined in the Installation Manual for

additional venting requirements.

Note: In all cases accessibility clearance shall take precedence over clearances from the enclosure where accessibility clearances are greater. All dimensions are given in inches.

High Altitude Derate

When this furnace is installed at high altitude, the appropriate High Altitude orifice kit must be installed. This is required due to the natural reduction in the density of both the gas fuel and combustion air as altitude increases. The kit will provide the proper design certified input rate within the specified altitude range.

INPUT PER BURNER - 22,500 BTUH NATURAL GAS / 20,000 BTUH L.P.

ELEVATION ABOVE SEA-LEVEL (FEET)

2000 3000 4000 4500 5000 6000 7000

US BURNER

ORIFICE

CANADA BURNER

ORIFICE

44/55

44/55

44/55 45/56

47/57

45/56 46/57 47/58

HA-02 HIGH ALTITUDE CONVERSION KIT REQUIRED

Tabled data is based upon the furnace input being reduced for altitudes above sea level. U.S. 4% per 1,000 feet.

Canada 10% derate for 2,000-4,000 feet.

8000

47/58

WARNING

T

O PREVENT POSSIBLE PERSONAL INJURY OR DEATH DUE TO ASPHYXIATION,

THIS FURNACE MUST BE C ATEGORY I VENTED. D O NOT VENT USING

C

ATEGORY

III

VENTING.

Category I Venting is venting at a non-positive pressure. A furnace vented as Category I is considered a fan-assisted appliance and the vent system does not have to be “gas tight.” NOTE: Single stage gas furnaces with induced draft blowers draw products of combustion through a heat exchanger allowing, in some instances, common venting with natural draft appliances (i.e. water heaters). All installations must be vented in accordance with National Fuel Gas Code

High altitude kits are purchased according to the installation altitude and usage of either natural or propane gas. Refer to the chart above for a tabular listing of appropriate altitude ranges and corresponding manufacturer’s high altitude Natural Gas and Propane Gas kits. For a tabular listing of appropriate altitude ranges and corresponding manufacturer's High

Altitude Pressure Switch kits, refer to either the Pressure

Switch Trip Points & Usage Chart in this manual or the Ac-

cessory Charts in Service Instructions.

PRODUCT DIMENSIONS

MODEL

GHS80453AXC*

GHS80704BXC*

GHS80905CXC*

A

14 1/2"

17 1/2"

21"

B

12 1/2"

16"

19 1/2"

MODEL

GDS80453AXC*

GDS80703AXC*

GDS80904BXC*

GDS81155CXC*

A

14 1/2"

17 1/2"

21"

B

12 1/2"

16"

19 1/2"

5

6

PRODUCT DESIGN

Pressure Switch Trip Points

And Usage Chart

Model

Trip Point

ID Blower

Pressure

Switch

ID Blower

Pressure

Switch

Part #

GHS80453AXC* -0.80

0130F00042

GHS80704BXC* -0.70

B1370158

GHS80905CXC* -0.70

B1370158

For installations in Canada, the GHS furances are certified only to 4,500 ft.

* Negative pressure readings are in inches of water column (*w.c.)

Part Number

PRIMARY LIMIT

0130M00063

Open Setting (°F) 140

GHS80453AXC* 1

GHS80704BXC*

GHS80905CXC*

---

1

20162903

120

---

1

---

ROLLOUT LIMIT SWITCHES

Part Number

Open Setting (°F)

GHS80453AXC*

GHS80704BXC*

GHS80905CXC*

B1370145

300

2

2

2

AUXILIARY LIMIT SWITCHES

Part Number

Open Setting (°F)

GHS80453AXC*

GHS80704BXC*

GHS80905CXC*

0130F00038

120

1

1

1

GHS8

PRODUCT DESIGN

Model

Presssure Switches

Part No.

Opens*

B1370142 -0.60

GDS80453AXC*

GDS80703AXC*

GDS80904BXC*

GDS81155CXC*

B137158

B1370142

B137158

-0.70

-0.60

-0.70

Part Number

Open Setting (°F)

GDS80453AXC*

GDS80703AXC*

GDS80904BXC*

PRIMARY LIMIT

0130F00035

220

GDS81155CXC*

---

---

1

1

0130F00036

180

1

1

---

---

ROLLOUT LIMIT SWITCHES

Part Number

Open Setting (°F)

GDS80453AXC*

GDS80703AXC*

GDS80904BXC*

GDS81155CXC*

B1370145

300

2

2

2

2

AUXILIARY LIMIT SWITCHES

Part Number

Open Setting (°F)

GDS80453AXC*

GDS80703AXC*

GDS80904BXC*

GDS81155CXC*

0130F00038

120

1

1

1

1

GDS8

7

8

PRODUCT DESIGN

Coil Matches:

A large array of Amana ® brand coils are available for use with the GHS8 furnaces, in horizontal applications and for the

GDS8 for downflow applications. These coils are available in both cased and uncased models (with the option of a field installed TXV expansion device). These 80% furnaces match up with the existing Amana ® brand coils as shown below.

Coil Matches (for Goodman

®

units using R22 and R-410A):

C A P F 1824 A 6 A

PRODUCT

TYPE:

C: Indoor Coil

EXPANSION

DEVICE:

F: Flowrater

CABINET FINISH:

U: Unpainted

P: Painted

N: Unpainted Case

APPLICATION

A: Upflow/Downflow Coil

H: Horizontal A Coil

S: Horizontal Slab Coil

NOMINAL CAPACITY RANGE

@ 13 SEER

1824: 1 1/2 to 2 Tons

3030: 2 1/2 Tons

3636: 3 Tons

3642: 3 to 3 1/2 Tons

3743: 3 to 3 1/2 Tons

4860: 4 & 5 Tons

4961: 4 & 5 Tons

REVISION

A: Revision

REFRIGERANT

CHARGE:

6: R-410A or R-22

2: R-22

4: R-410a

NOMINAL WIDTH FOR GAS FURNACE

A: Fits 14" Furnace Cabinet

B: Fits 17 1/2" Furnace Cabinet

C: Fits 21" Furnace Cabinet

D: Fits 24 1/2" Furnace Cabinet

N: Does Not Apply (Horizontal Slab Coils)

• All CAPF coils in B, C, & D widths have insulated blank off plates for use with one size smaller furnaces.

• All CAPF coils have a CAUF equivalent.

• All CHPF coils in B, C & D heights have an insulated Z bracket for use with one size smaller furnace.

• All proper coil combinations are subject to being AHRI rated with a matched outdoor unit.

PRODUCT DESIGN

Thermostats:

NOTE: Complete lineup of thermostats can be found in the Thermostat Specification Sheets.

Filters:

Filters are required with this furnace and must be provided by the installer. The filters used must comply with UL900 or

CAN/ULCS111 standards. Installing this furnace without filters will void the unit warranty

Upflow Filters

This furnace has provisions for the installation of return air filters at the side and/or bottom return. The furnace will accommodate the following filter sizes depending on cabinet size:

Cabinet

Width

(in.)

SIDE RETURN

Nominal

Filter Size

(in.)

Approx.

Flow Area

(in 2 )

All 16 x 25 x 1 400

BOTTOM RETURN

Cabinet

Width

(in.)

Nominal

Filter Size

(in.)

Approx.

Flow Area

(in 2 )

17-1/2 14 x 25 x 1

21 16 x 25 x 1

24-1/2 20 x 25 x 1

350

400

500

Refer to Minimum Filter Area tables to determine filter area requirement. NOTE: Filters can also be installed elsewhere in the duct system such as a central return.

0704__XA

0905__XA

1155__XA

600

UPFLOW

COOLING AIRFLOW REQUIREMENT (CFM)

800 1000 1200 1400 1600 2000

---

---

---

---

---

---

564*

---

---

564*

752*

940*

672

752*

940*

768

768

940*

960

960

0704__XA

0905__XA

600

COUNTERFLOW

COOLING AIRFLOW REQUIREMENT (CFM)

800 1000 1200 1400 1600 2000

----641* 641* 672 768 ---

------854* 854* 854* 960

0704__XA

0905__XA

1155__XA

0704__XA

0905__XA

600

UPFLOW

COOLING AIRFLOW REQUIREMENT (CFM)

800 1000 1200 1400 1600 2000

---

---

---

---

---

---

627*

---

---

627*

836*

940*

672

836*

940*

768

836*

940*

---

960

960

600

COUNTERFLOW

COOLING AIRFLOW REQUIREMENT (CFM)

800 1000 1200 1400 1600 2000

----320* 320* 336 384 ---

------427* 427* 427* 480

*Minimum filter area dictated by heating airflow requirement.

*Minimum filter area dictated by heating airflow requirement.

Disposable Minimum Filter Area (in

2

)

[Based on a 300 ft/min filter face velocity]

Permanent Minimum Filter Area (in

2

)

[Based on 600 ft/min filter face velocity]

9

PRODUCT DESIGN

Counterflow Filters

This furnace has provisions for the installation of return air filters at the counterflow top return. The furnace will accommodate the following filter sizes depending on cabinet size:

Optional

Access

Door

Return Air

"A"

Min

Counterflow Top Return

Cabinet Width

21

24 1/2

21

24 1/2

21

24 1/2

Filter Area

(in

2

)

Qty

Filter Size

(in)

Dimension "A"

(in)

600

800

1000

2

2

2

15 X 20 X 1

20 X 20 X 1

25 X 20 X 1

13.0

11.3

18.8

17.7

24.3

23.4

Refer to Minimum Filter Area tables to determine filter area requirement. NOTE: Filters can also be installed elsewhere in the duct system such as a central return.

10

FURNACE SPECIFICATIONS

MODEL

Btuh Input (US) High Fire

(1)

Output (US) High Fire

(1)

A.F.U.E.

(2)

Rated External Static (" w.c.)

Temperature Rise (°F)

Pressure Switch Trip Point (" w.c.)

Blower Wheel (D" x W")

Blower Horsepower

Blower Speeds

Max CFM @ 0.5 E.S.P.

Power Supply

Minimum Circuit Ampacity (MCA)

(4)

Maximum Overcurrent Device

(5)

Transformer (VA)

Heat Anticipator (Amps)

Primary Limit Setting (°F)

Auxiliary Limit Setting (°F)

Rollout Limit Setting (°F)

Gas Supply Pressure (Natural/Propane) (" w.c.)

Manifold Pressure

(Natural/Propane) High Stage (" w.c.)

Orifice Size (Natural/Propane)

Number of Burners

Vent Connector Diameter (inches)

(3)

Shipping Weight (lbs.)

115-60-1

8.5

15

40

0.7

220

120

300

7 / 11

3.5 / 10

#43 / #55

2

4

120

115-60-1

8.5

15

40

0.7

220

120

300

7 / 11

3.5 / 10

#43 / #55

3

4

130

115-60-1

12.9

15

40

0.7

180

120

300

7 / 11

3.5 /10

#43 / #55

4

4

153

GDS8

GDS80453AXC* GDS80703AXC* GDS80904BXC* GDS81155CXC*

45,000

36,000

80%

.20 - .50

35-65

-0.60

10 X 6

1/3

70,000

56,000

80%

.20 - .50

30-60

-0.70

10 x 6

1/3

90,000

72,000

80%

.20 - .50

35-65

-0.60

10 x 8

1/2

115,000

92,000

80%

.20 - .50

40 - 70

-0.70

10 x 10

3/4

Refer toairflow charts.

115-60-1

12.9

15

40

0.7

180

120

300

7 / 11

3.5 /10

#43 / #55

5

4

175

1 Natural Gas BTU/h. For altitudes above 2,000’, reduce input rating 4% for each 1,000’ above sea level.

2 DOE AFUE based upon Isolated Combustion System (ICS)

3 Vent and combustion air diameters may vary depending upon vent length.

Refer to the latest editions of the National Fuel Gas Code NFPA 54/ANSI Z223.1 (in the USA) and the Canada National Standard of Canada, CAN/CSA B149.1

and CAN/CSA B142.2 (in Canada).

4 Minimum Circuit Ampacity = (1.25 x Circulator Blower Amps) + ID Blower amps. Wire size should be determined in accordance with National Electrical Codes.

Extensive wire runs will require larger wire sizes.

5 Maximum Overcurrent Protection Device refers to maximum recommended fuse or circuit breaker size. May use fuses or HACR-type circuit breakers of the same size as noted.

Notes:

• All furnaces are manufactured for use on 115 VAC, 60 Hz, single-phase electrical supply.

• Gas Service Connection ½” FPT

• Important: Size fuses and wires properly and make electrical connections in accordance with the National Electrical Code and/or all existing local codes.

NOTES:

* These furnaces are manufactured for natural gas operation. Optional Kits are available for conversion to propane gas operation.

*

*

For elevations above 2000 ft. the rating should be reduced by 4% for each 1000 ft. above sea level. The furnace must not be derated, orifice changes should only be made if necessary for altitude.

The total heat loss from the structure as expressed in TOTAL BTU/HR must be calculated by the manufactures method in accordance with the "A.S.H.R.A.E.

GUIDE" or "MANUAL J-LOAD CALCULATIONS" published by the AIR CONDITIONING CONTRACTORS OF AMERICA. The total heat loss calculated should be equal to or less than the heating capacity. Output based on D.O.E. test procedures, steady state efficiency times output.

Unit specifications are subject to change without notice. ALWAYS refer to the unit's serial plate for the most up-to-date general and electrical information.

11

FURNACE SPECIFICATIONS

MODEL

Input, Natural Gas (BTUH)

(1)

Output, Natural Gas (BTUH)

(1)

Output, LP (BTUH)

A.F.U.E.

(2)

Rated External Static (" w.c.)

Temperature Rise (°F)

Pressure Switch Trip Point ( " w.c.)

Blower Wheel (D" x W")

Blower Horsepower

Blower Speeds

Max CFM @ 0.5 E.S.P.

Power Supply (Volts/Hz/Ph)

Minim um Circuit Ampacity (MCA)

(4)

Maximum Overcurrent Device

(5)

Transformer (VA)

ID Blower Pressure Switch Trip Point (" w.c.)

Prim ary Limit Setting (°F)

Aux iliary Lim it Setting (°F)

Rollout Limit Setting (°F)

Gas Supply Pres sure (Natural/Propane) (" w.c.)

Manifold Pressure (Natural/Propane) (" w.c.)

Orifice Size (Natural/Propane)

Number of Burners

Vent Connector Diameter (inches)

(3)

Shipping Weight (lbs.)

GHS8

115/60/1

12.5

15

40

-0.80

140

120

300

7 / 11

3.5 / 10

43 / 55

2

4

120

GHS80453AXC*

45,000

36,000

32,000

80.0%

0.20 - 0.50

15 - 45

-0.80

11” x 6”

1/2

GHS80704BXC*

70,000

56,000

48,000

80.0%

0.20 - 0.50

30 - 60

-0.70

11” x 8”

3/4

Refer to airflow charts.

GHS80905CXC*

90,000

72,000

64,000

80.0%

0.20 - 0.50

35 - 65

-0.70

11” x 10”

3/4

115/60/1

11.8

15

40

-0.70

120

120

300

7 / 11

3.5 / 10

43 / 55

3

4

130

115/60/1

11.8

15

40

-0.70

140

120

300

7 / 11

3.5 / 10

43 / 55

4

4

153

1 Natural Gas BTU/h. For altitudes above 2,000’, reduce input rating 4% for each 1,000’ above sea level.

2 DOE AFUE based upon Isolated Combustion System (ICS)

3 Vent and combustion air diameters may vary depending upon vent length.

Refer to the latest editions of the National Fuel Gas Code NFPA 54/ANSI Z223.1 (in the USA) and the Canada National Standard of Canada, CAN/CSA B149.1

and CAN/CSA B142.2 (in Canada).

4 Minimum Circuit Ampacity = (1.25 x Circulator Blower Amps) + ID Blower amps. Wire size should be determined in accordance with National Electrical Codes.

Extensive wire runs will require larger wire sizes.

5 Maximum Overcurrent Protection Device refers to maximum recommended fuse or circuit breaker size. May use fuses or HACR-type circuit breakers of the same size as noted.

Notes:

• All furnaces are manufactured for use on 115 VAC, 60 Hz, single-phase electrical supply.

• Gas Service Connection ½” FPT

• Important: Size fuses and wires properly and make electrical connections in accordance with the National Electrical Code and/or all existing local codes.

NOTES:

* These furnaces are manufactured for natural gas operation. Optional Kits are available for conversion to propane gas operation.

*

*

For elevations above 2000 ft. the rating should be reduced by 4% for each 1000 ft. above sea level. The furnace must not be derated, orifice changes should only be made if necessary for altitude.

The total heat loss from the structure as expressed in TOTAL BTU/HR must be calculated by the manufactures method in accordance with the "A.S.H.R.A.E.

GUIDE" or "MANUAL J-LOAD CALCULATIONS" published by the AIR CONDITIONING CONTRACTORS OF AMERICA. The total heat loss calculated should be equal to or less than the heating capacity. Output based on D.O.E. test procedures, steady state efficiency times output.

Unit specifications are subject to change without notice. ALWAYS refer to the unit's serial plate for the most up-to-date general and electrical information.

BLOWER PERFORMANCE SPECIFICATIONS

BLOWER PERFORMANCE

(CFM & Temperature Rise vs. External Static Pressure)

GHS8

EXTERNAL STATIC PRESSURE (Inches Water Column)

Model

(

Heating Speed

)

As Shipped

Motor

Speed

Tons AC at 0.5" 0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

ESP CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM CFM CFM

High 3.0

1,739 19 1,656 20 1,601 21 1,551 21 1,513 22 1,460 1,413 1,353

GHS8

0453AXC

(Med)²

Med

Med-Lo

2.5

2.0

1,422 23 1,399 24 1,378 24 1,350 25 1,305 26 1,275 1,220 1,178

1,207 28 1,213 27 1,197 28 1,169 29 1,158 29 1,131 1,103 1,068

GHS8

0704BXC

(Med)²

GHS8

0905CXC

(Med)²

Low

High

Med

Med-Lo

Low

High

Med

Med-Lo

Low

1.5

4.0

3.5

3.0

3.0

5.0

4.0

3.5

3.0

991 34 980 34 958 35 950 35 937 36 924 910 874

2,097 25 2,068 25 2,012 26 1,939 27 1,869 28 1,795 1,718 1,631

1,596 32 1,566 33 1,534 34 1,492 35 1,445 36 1,401 1,354 1288

1,380 38 1,356 38 1,328 39 1,303 40 1,274 41 1,239 1,192 1127

1239 42 1191 44 1165 45 1133 46 1,104 47 1,082 1,040 996

2,382 28 2,315 29 2,234 30 2,158 31 2,078 32 1,971 1,866 1,762

1,622 41 1,603 42 1,583 42 1,556 43 1,516 44 1,482 1,422 1,359

1,436 46 1,391 48 1,387 48 1,356 49 1,325 50 1,279 1,239 1,180

1,240 54 1,214 55 1,191 56 1,157 58 1,120 60 1,083 1,052 1,025

•

•

•

•

•

•

NOTES:

• CFM in chart is without filter(s). Filters do not ship with this furnace, but must be provided by the installer.

All furnaces ship as high-speed cooling. Installer must adjust blower cooling speed as needed.

For most jobs, about 400 CFM per ton when cooling is desirable

INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.

The chart is for information only. For satisfactory operation, external static pressure must not exceed values shown on the rating plate. The shaded area indicates ranges in excess of maximum static pressure allowed when heating.

The dashed (---) areas indicate a temperature rise not recommended for this model.

The above chart is for U.S. furnaces installed at 0' - 2,000'. At higher altitudes, a properly de-rated unit will have approximately the same temperature rise at a particular CFM, while ESP at the CFM will be lower.

13

BLOWER PERFORMANCE SPECIFICATIONS

BLOWER PERFORMANCE

(CFM & Temperature Rise vs. External Static Pressure)

GDS8

Model

(

Heating Speed

)

As Shipped

GDS8

0453AXC

(Med)²

Motor

Speed

Tons AC at 0.5" 0.1

EXTERNAL STATIC PRESSURE (Inches Water Column)

0.2

0.3

0.4

0.5

0.6

0.7

0.8

ESP CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM CFM CFM

HIGH 3.0

MED 2.5

MED-LO 2.0

1,353 25 1,290 26 1,246 27 1,199 28 1,149 29 1,116 1,116 1,099

1,183 28 1,113 30 1,098 30 1,052 32 1,039 32 1,006 1,012 969

980 34 946 35 920 36 900 37 896 37 885 855 804

GDS8

0703AXC

(Med)²

LOW

HIGH

MED

MED-LO

LOW

HIGH

MED

MED-LO

2.0

1.5

4.0

1.5

3.0

2.5

3.5

3.0

778 43 762 44 738 45 746 45 738 45 717 696 678

1,290 40 1,236 42 1,194 43 1,166 44 1,176 44 1,166 1,108 1,029

1,139 46 1,090 48 1,035 50 1,063 49 1,063 49 1020 962 895

962 54 927 56 925 56 941 55 909 57 877 834 779

787 66 776 67 763 68 744 70 723 72 690 641 581

2,128 31 2,063 32 2,001 33 1,927 35 1,824 37 1,726 1,628 1,529

1,840 36 1,788 37 1,745 38 1,689 39 1,625 41 1,550 1,470 1,364

1,602 42 1,558 43 1,543 43 1,493 45 1,455 46 1,402 1,328 1,239

GDS8

0904BXC

(Med)²

LOW 2.5

HIGH 5.0

MED 4.0

1,277 52 1,252 53 1,244 54 1,229 54 1,214 55 1,179 1141 1079

2,405 35 2,361 36 2,250 38 2,161 39 2,037 42 1,937 1,808 1,689

1,880 45 1,838 46 1,794 47 1,734 49 1,677 51 1,568 1,510 1,401 GDS8

1155CXC

(Med)² MED-LO

LOW

3.5

3.0

1659

1,472

51

58

1,630

1,454

52

59

1,587

1,404

54

61

1,537

1,366

55

62

1,492

1,326

57

64

1,445 1,368 1,287

1300 1228 1139

•

•

•

•

NOTES:

• CFM in chart is without filter(s). Filters do not ship with this furnace, but must be provided by the installer.

•

All furnaces ship as hig-speed cooling. Installer must adjust blower cooling speed as needed.

For most jobs, about 400 CFM per ton when cooling is desirable

INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.

• The chart is for information only. For satisfactory operation, external static pressure must not exceed values shown on the rating plate. The shaded area indicates ranges in excess of maximum static pressure allowed when heating.

The dashed (---) areas indicate a temperature rise not recommended for this model.

The above chart is for U.S. furnaces installed at 0' - 2,000'. At higher altitudes, a properly de-rated unit will have approximately the same temperature rise at a particular CFM, while ESP at the CFM will be lower.

14

BLOWER PERFORMANCE SPECIFICATIONS

E RISE ATUR TEMPER

15

WIRING DIAGRAMS

HIGH VOLTAGE!

DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS

UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO

DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

G*S8

BOX

16

Wiring is subject to change, always refer to the wiring diagram on the unit for the most up-to-date wiring.