Use and Care Manual

ManualsBrandsGOODMAN ManualsAir Conditioners3.5 Ton 14 SEER 38000 BTU 80% AFUE 80K BTU R410A Split System Central Air Conditioning and Multi-Position Gas System

SS-GMH8 www.goodmanmfg.com 10/16

Supersedes 10/15

Heating Input: 40,000–140,000 BTU/h

Two-Stage Convertible

Multi-Speed Gas Furnaces

80% AFUE

Standard Features Cabinet Features

• Heavy-duty aluminized-steel dual-

diameter, tubular heat exchanger

• 



• Durable Silicon Nitride igniter

• 

• 

with constant memory fault code

• Color-coded low-voltage terminals with provisions



• 

• 

• California Low NOx emissions standards models available

• 





• 

for gas and electrical service

• Cabinet air leakage (Q

Leak



• Heavy-gauge steel cabinet with



• Fully insulated heat exchanger



*                

Exchanger Limited Warranty (good for as long as you own your home), 10-Year Unit Replacement Limited Warranty and





Contents

Nomenclature ........................................ 

 ........................... 3

Dimensions ............................................ 5

 ........................................... 7

Wiring Diagram .................................... 10

Accessories .......................................... 11

Minimum Filter Sizes .......................... 11

GMH8/GDH8

Summary of content (12 pages)

PAGE 1
GMH8/GDH8 Two-Stage Convertible Multi-Speed Gas Furnaces 80% AFUE Heating Input: 40,000–140,000 BTU/h Contents Nomenclature......................................... 2 Product Specifications............................ 3 Dimensions............................................. 5 Airflow Data............................................ 7 Wiring Diagram..................................... 10 Accessories........................................... 11 Minimum Filter Sizes ...........................
PAGE 2
Nomenclature G M H 80 040 3 B X ** 1 2 4 5,6 7,8,9 10 11 12 13,14 Brand Engineering G - Goodman® Brand Major / Minor Revisions Configuration NOx M - Upflow/Horizontal C - Downflow/Horizontal N - Natural Gas D - Dedicated Downflow X - Low NOx Gas Valve Cabinet Width H - Convertible Two-Stage, Single Phase S - Single Stage, Single Speed A - 14" C - 21" B - 17½" D - 24½" AFUE Maximum CFM 80 - 80% AFUE 3 - 1200 CFM MBTU/h 2 4 - 1600 CFM 040 - 40,000 BTU/h 100 - 100,000 BTU/
PAGE 3
Product Specifications — GMH8 GMH8 GMH8 GMH8 GMH8 GMH8 GMH8 GMH8 GMH8 GMH8 0403A*B 0603A*B 0604B*B 0803B*B 0804B*B 0805C*B 1005C*B 1205D*B 1405D*B Heating Capacity Input 40,000 60,000 60,000 80,000 80,000 80,000 100,000 120,000 140,000 Natural Gas Output 32,000 48,000 48,000 64,000 64,000 64,000 80,000 96,000 112,000 LP Gas Output 32,000 48,000 48,000 64,000 64,000 64,000 80,000 96,000 96,000 AFUE ¹ 80 80 80 80 80 80 80 80 80 Available AC @ 0.
PAGE 4
Product Specifications — GDH8 Heating Capacity Input Natural Gas Output LP Gas Output AFUE ¹ Available AC @ 0.5” ESP Temperature Rise Range (°F) Circulator Blower Size (D x W) Horsepower @1075 RPM Speed Vent Diameter ² No. of Burners Electrical Data Min. Circuit Ampacity ³ Max.
PAGE 5
GMH8 Dimensions Alternate Gas Inlet 1¾” 17⁄16” A B 33⅜” Alt. Gas Inlet 27⅞” 20” High-Voltage Inlet 235⁄16” Alt. High Voltage 13¼” Low-Voltage Inlet Alt.
PAGE 6
GDH8 Dimensions A 28” 19 ⅝” B High-Voltage Electrical Low-Voltage Electrical 33 ⅜” Gas Inlet 18 ⅜” 11 ⅜” Model A B Non-Combustible Floor Base GDH80403A*B 14” 12½” SBT14 GDH80603A*B 14” 12½” SBT14 GDH80804B*B 17½” 16” SBT17 GDH81005C*B 21” 19½” SBT21 Notes • Line voltage wiring and low-voltage wiring can enter through the right or left side of furnace. • Conversion kits for high-altitude (4500+ ft) natural gas operation are available.
PAGE 7
GMH8 Airflow Data (CFM & Temperature Rise vs. External Static Pressure) Model GMH8 0403A*B GMH8 0603A*B GMH8 0604B*B GMH8 0803B*B GMH8 0804B*B GMH8 0805C*B GMH8 1005C*B GMH8 1205D*B GMH8 1405D*C Motor Speed Tons AC¹ External Static Pressure, (Inches Water Column) 0.1 CFM 0.2 Rise CFM 0.3 Rise CFM 0.4 Rise CFM 0.5 Rise CFM 0.6 0.7 0.8 Rise CFM CFM CFM 1,075 High 3 1,521 --- 1,466 --- 1,414 --- 1,373 --- 1,298 --- 1,243 1,164 Med 2.
PAGE 8
GDH8 Airflow Data (CFM & Temperature Rise vs. External Static Pressure) Model GDH8 0403A*B (Med)² GDH8 0603A*B (Med)² GDH8 0804B*B (Med)² GDH8 1005C*B (Med)² External Static Pressure, (Inches Water Column) Motor Speed Tons AC¹ CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM CFM CFM High 3.0 1,353 --- 1,290 --- 1,246 --- 1,199 25 1,149 26 1,116 1,116 1,099 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Med 2.
PAGE 9
SS-GMH8 www.goodmanmfg.com 10 20 30 40 50 60 70 30 80 90 100 40 50 60 700 600 CFM 90 100 2000 2200 2400 CFM 1800 1600 1400 OUTPUT BTU/HR x 1000 Output BTU/h x 1,000 80 1200 1100 1000 900 70 800 Formulas FORMULAS 110 120 130 CFM x 1.08 140 BTUBTU/h OUTPUT = CFM x 1.08 x RISE Output = CFRM x 1.08 x Rise BTU OUTPUT BTU/H Output ÷ CFM RISE = Rise = ÷ CFM 1.08 BTU OUTPUT vs TEMPERATURE CHART BTU/h Output Vs.
PAGE 10
Wiring Diagram WARNING:DISCONNECT POWER BEFORE SERVICING.WIRING TO UNIT MUST BE PROPERLY POLARIZED AND GROUNDED.
PAGE 11
Accessories Model Description GMH8 0403A* GMH8 0603A* GMH8 0604B* GMH8 0803B* GMH8 0804B* GMH8 0805C* GMH8 1005C* GMH8 1205D* GMH8 1405D* LPM-06 LP Conversion Kit (Springs & Orifice)¹ √ √ √ √ √ √ √ √ √ HANG20 High-Altitude Natural Gas Kit (4500+ ft) √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ FTK04 Twinning Kit √ √ √ √ √ √ √ MVK-01² Masonry Vent Kits √ √ √ √ √ √ √ MVK-02² Masonry Vent Kits AFE18-60A Fossil Fuel Kit ¹ ² √ √ √ √ √ √ √ Honeywell or White-
PAGE 12
Notes Goodman Manufacturing Company, L.P., reserves the right to discontinue, or change at any time, specifications or designs without notice or without incurring obligations. ©2016 Goodman Manufacturing Company, L.P. • Houston, Texas • Printed in the USA. 12 www.goodmanmfg.