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These furnaces comply with requirements
embodied in the American National Standard
/ National Standard of Canada ANSI
Z21.47·CSA-2.3 Gas Fired Central
Furnaces.

RECOGNIZE THIS SYMBOL AS A SAFETY PRECAUTION.

ATTENTION INSTALLING PERSONNEL

As a professional installer you have an obligation to know the product better than the customer.  This includes all

safety precautions and related items.

Prior to actual installation, thoroughly familiarize yourself with this Instruction Manual. Pay special attention to all

safety warnings. Often during installation or repair it is possible to place yourself in a position which is more hazardous

than when the unit is in operation.

Remember, it is 

your 

responsibility to install the product safely and to know it well enough to be able to instruct a

customer in its safe use.

Safety is a matter of common sense...a matter of thinking before acting. Most dealers have a list of specific good

safety practices...follow them.

The precautions listed in this Installation Manual are intended as supplemental to existing practices.   However, if there

is a direct conflict between existing practices and the content of this manual, the precautions listed here take

precedence.

*NOTE:  Please contact your distributor or our website for the applicable product data book referred to in this manual.

 

C

US

®

INSTALLATION & OPERATING

INSTRUCTIONS for GMV8

GAS FIRED WARM AIR FURNACE

2-STAGE

I0-241C

02/06

©

 

2004-2006 Goodman Manufacturing Company, L.P.

(CATEGORY 1)

Summary of Contents for GMV8

Page 1: ...han when the unit is in operation Remember it is your responsibility to install the product safely and to know it well enough to be able to instruct a customer in its safe use Safety is a matter of co...

Page 2: ...HECK 3 CHIMNEY CROWN CONDITION 13 CHECK 4 DEBRIS IN CLEANOUT 13 CHECK 5 LINER CONDITION 13 CHECK 6 DILUTION AIR 13 CHECK 7 COMPLETE THE INSTALLATION 13 FIX 1 LINER TERMINATION 14 FIX 2 CHANGE VENTING...

Page 3: ...MPERATURE RISE 25 CIRCULATOR BLOWER SPEED ADJUSTMENT 25 ADJUST BLOWER HEAT OFF DELAY 27 CIRCULATOR BLOWER FAN TIMING ADJUSTMENT 27 XIII OPERATIONAL CHECKS 27 BURNER FLAME 27 AUXILIARY LIMIT CONTROL 27...

Page 4: ...ponent failures could result in heating system operational problems TO THE INSTALLER Before installing this unit please read this manual thoroughly to familiarize yourself with specific items which mu...

Page 5: ...stalling the control on a furnace Return any old or new controls to their containers before touching any ungrounded object III PRODUCT APPLICATION This furnace is primarily designed for residential ho...

Page 6: ...ents and glues antistatic fabric softeners for clothes dryers and masonry acid washing materials WARNING POSSIBLE PROPERTY DAMAGE PERSONAL INJURY OR DEATH DUE TO FIRE EXPLOSION SMOKE SOOT CONDENSTAION...

Page 7: ...ATOR BLOWER REMOVAL 3 8 DIAMETER THREADED ROD 6 PLACES PROVIDE 8 MINMUM CLEARANCE BETWEEN CENTER ROD AND FURNACE CABINET TO ALLOW FOR CIRCULATOR BLOWER REMOVAL ASSURE FURNACE IS LEVEL FROM END TO END...

Page 8: ...an 50 cubic feet per 1 000 BTU per hour of the aggregate input rating of all appliances installed in that space Rooms communicating directly with the space in which the appliances are installed throug...

Page 9: ...sure Inlet Air Ventilation louvers for unheated crawl space Alternate air inlet Ventilation louvers each end of attic Equipment Located in Confined Spaces All Air from Outdoors Inlet Air from Ventilat...

Page 10: ...eration of installed gas utilization equipment VI CATEGORY I VENTING VERTICAL VENTING WARNING TO PREVENT POSSIBLE PERSONAL INJURY OR DEATH DUE TO ASPHYXIATION THIS FURNACE MUST BE CATEGORY I VENTED DO...

Page 11: ...ng In most situations the existing masonry chimneys will require a properly sized metallic liner WARNING POSSIBILITY OF PROPERTY DAMAGE PERSONAL INJURY OR DEATH DAMAGING CONDENSATION CAN OCCUR INSIDE...

Page 12: ...condition Check 5 Yes Yes No Reline Fix 4 Dilution air available Check 6 Complete the installation Check 7 CHECK 1 PROPER CHIMNEY TERMINATION A masonry chimney used as a vent for gas fired equipment...

Page 13: ...seal Use caution when doing this as the cut edges of flexible liners may be sharp The surfaces of the liner must be physically sound If gaps or holes are present the metal liner must be removed and r...

Page 14: ...F ELECTRICAL SHOCK WIRING TO THE UNIT MUST BE POLARIZED AND GROUNDED FIX 1 LINER TERMINATION Any cap or roof assembly used with a liner must be approved by the liner manufacturer for such use The line...

Page 15: ...SK OF INJURY ELECTRICAL SHOCK OR DEATH THE FURNACE MUST BE ELECTRICALLY GROUNDED IN ACCORDANCE WITH LOCAL CODES OR IN THEIR ABSENCE WITH THE LATEST EDITION OF THE NATIONAL ELECTRIC CODE WARNING EDGES...

Page 16: ...m located on the blower compartment door for further details of 115 Volt and 24 Volt wiring SINGLE STAGE THERMOSTAT APPLICATION W G Y Single Stage Heating with Single Stage Cooling R B C G R W1 W2 O Y...

Page 17: ...G R W1 W2 CR35 R122 R128 W3 DS7 R191 R85 DS3 R84 R22 DS4 DS5 TP1 TP2 DEHUMIDIFICATION LED YELLOW DEHUMIDIFICATION JUMPER WIRE CUT TO ENABLE W 14 FOSSIL FUEL APPLICATIONS This furnace can be used in co...

Page 18: ...cause poor combustion and equipment failure When this furnace is installed at high altitude the appropriate High Altitude orifice kit must be applied The furnace is supplied with orifices sized for na...

Page 19: ...ranges and pressure switch kits High Low 70 90 115 7 500 0 5 w c 0 3 w c NR Pressure Switch Changes Setting Furnace Input kBtu hr Altitude ft PROPANE GAS CONVERSION WARNING POSSIBLE PROPERTY DAMAGE P...

Page 20: ...1 8 Pipe Plug To Measure Line Gas Pressure General Furnace Layout UPFLOW INSTALLATIONS When the gas piping enters through the right side of the furnace the installer must supply the following fitting...

Page 21: ...50 330 770 1 500 2 400 3 700 1 500 3 400 60 300 700 1 300 2 200 3 300 1 300 3 100 80 260 610 1 200 1 900 2 900 1 200 2 600 100 220 540 1 000 1 700 2 600 1 000 2 300 125 200 490 900 1 400 2 300 900 2 1...

Page 22: ...g to the low heat circulating speed from entering the furnace and if manually operated must be equipped with means to prevent operation of either unit unless the damper is in the full heat or cool pos...

Page 23: ...acts open completing the call for heat Gas valve closes extinguishing flame Induced draft blower is de energized following a fifteen second post purge Humidifier terminals are de energized Circulator...

Page 24: ...um 13 0 w c Inlet Gas Supply Pressure If supply pressure differs from table make the necessary adjustments to pressure regulator gas piping size etc and or consult with local gas utility 5 Turn OFF ga...

Page 25: ...eed If the correct amount of temperature rise is not obtained it may be necessary to change the blower speed An incorrect temperature rise can cause condensing in or overheating of the heat exchanger...

Page 26: ...he motor then ramps to 100 of the required airflow A 1 minute OFF delay at 100 of the cooling airflow OFF 100 CFM Cooling Demand 100 CFM 1 min 50 CFM OFF min Profile C ramps up to 82 of the full cooli...

Page 27: ...econds after the call for cooling ends During normal heating operation the circulator fan will come on approximately 37 seconds after the gas valve opens ON OFF ON OFF ON OFF ON OFF 1 2 1 2 1 2 1 2 90...

Page 28: ...and monitors heat exchanger compartment temperatures It is an automatic reset temperature sensor The limit guards against the overheating as a resulting of insufficient air passing over the heat excha...

Page 29: ...means of filtering all of the return air The installer will supply filter s at the time of installation FILTER MAINTENANCE Improper filter maintenance is the most common cause of inadequate heating o...

Page 30: ...t off electric power and gas supply to the furnace 2 Remove screws securing manifold to burner bracket Slightly pull manifold out and away from burner bracket Burners will drop Re secure manifold to b...

Page 31: ...it Inspect pressure switch hose Repair if necessary Inspect flue for blockage proper length elbows and termination Correct pressure switch setpoint or contact motion Tighten or correct wiring connecti...

Page 32: ...or proper sensor alignment Check inlet air piping for blockage proper length elbows and termination Compare current gas pressure to rating plate info Adjust as needed Turn power OFF prior to repair Tu...

Page 33: ...RLY O N SO M E M O D ELS IN DU C T OR C O IL P R ES S U RE SW ITC H LO W FIR E Y L R D BK W H IN DU C E D B R G N D WH WH BK BR RD GN BU BR W H A U XILIA R Y LIM IT C O NT R OLS R D B U W H VAC 115 VA...

Page 34: ...ct failure They are simple to service and forgiving to operate We use quality materials and components Finally every unit is run tested before it leaves the factory That s why we know There s No Bette...

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