Goodman xMEC96 Series User Manual
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Goodman xMEC96 Series User Manual

Upflow / horizontal two-stage gas furnace
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*MEC96
U
/ H
PFLOW
ORIZONTAL
G
AS
(Type FSP CATEGORY IV Direct
or Non Direct Vent Air Furnace)
These furnaces comply with requirements em-
bodied in the American National Standard / Na-
tional Standard of Canada ANSI Z21.47·CSA-2.3
Gas Fired Central Furnaces.
s a professional installer you have an obligation to know
A
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.
RECOGNIZE THIS SYMBOL
AS A SAFETY PRECAUTION.
NOTE: Please contact your distributor or our website for
*
the applicable Specification Sheet referred to in this manual.
IOG-2011B
11/14
is a registered trademark of Maytag Corporation or its related companies and is used under license to Goodman Company, L.P ., Houston, TX, USA. All rights reserved.
T
-S
WO
TAGE
F
URNACE
Installer:
Affix all manuals
adjacent to the unit.
www.goodmanmfg.com • www.amana-hac.com
© 2014 Goodman Manufacturing Company, L.P.
SAFETY CONSIDERATIONS .................................... 3
PRODUCT DESCRIPTION ....................................... 5
...................................................... 5
PRODUCT APPLICATION ....................................... 5
INSTALLATION POSITIONS .................................... 9
................................................... 10
P
V
V
V
V
V
/I
V
V
U
M
PFLOW
ODEL
U
M
PFLOW
ODEL
Houston, TX 77056

TABLE OF CONTENTS

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ENTILATION
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NSTALLED
ORIZONTALLY WITH
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H
NSTALLED
ORIZONTALLY WITH
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  • Page 1: Table Of Contents

    Houston, TX 77056 www.goodmanmfg.com • www.amana-hac.com IOG-2011B 11/14 © 2014 Goodman Manufacturing Company, L.P. is a registered trademark of Maytag Corporation or its related companies and is used under license to Goodman Company, L.P ., Houston, TX, USA. All rights reserved.

  • Page 2: Safety Considerations

    OPERATIONAL CHECKS ........38 ELECTRICAL CONNECTIONS ......... 21 SAFETY CIRCUIT DESCRIPTION ......38 ..........21 IRING ARNESS 115 V ........21 ......... 38 NTEGRATED ONTROL ODULE ONNECTIONS ........21 ..........38 UNCTION ELOCATION RIMARY IMIT ..........38 24 V ........22 HERMOSTAT IRING UXILIARY...
  • Page 3 Combustion products must be discharged to the outdoors. WARNING Connect this furnace to an approved vent system only, as specified in VENT/FLUE PIPE & COMBUSTION AIR PIPE sec- F THE INFORMATION IN THESE INSTRUCTIONS IS NOT FOLLOWED tion of this manual. EXACTLY A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE...

  • Page 4: Shipping Inspection

    RISQUE D'EMPOISONNEMENT AU MONOXYDE DE CARBONE Advertencia especial para la instalación de calentadores ó manejadoras de aire en áreas cerradas como estacionamientos ó cuartos de servicio. Cette ventilation est nécessaire pour éviter le danger d'intoxication Las emisiones de monóxido de carbono pueden circular a través au CO pouvant survenir si un appareil produisant du monoxyde del aparato cuando se opera en cualquier modo.

  • Page 5: Product Description

    2. Firmly touch a clean, unpainted, metal surface of the furnaces near the control. Any tools held in a person’s hand during grounding will be discharged. 3. Service integrated control module or connecting wiring following the discharge process in step 2. Use caution not to recharge your body with static electricity;...

  • Page 6: Location Requirements & Considerations

    • 100% outside air is provided for combustion air requirements during construction. Temporary ducting can be used. NOTE: Do not connect the temporary duct directly to the furnace. The duct must be sized for adequate combustion and ventilation in accordance with the latest edition of the National Fuel Gas Code NFPA 54/ANSI Z223.1 or CAN/CSA B149.1 Installation Codes.

  • Page 7: Clearances And Accessibility

    • Ensure upflow or horizontal furnaces are not installed directly on carpeting, or any other combustible material. The only combustible material allowed is wood. • Exposure to contaminated combustion air will result in safety and performance-related problems. Do not install the furnace where the combustion air is exposed to the following substances: permanent wave solutions chlorinated waxes or cleaners...

  • Page 8: Existing Furnace Removal

    XISTING URNACE EMOVAL NOTE: When an existing furnace is removed from a venting system serving other appliances, the venting system may be too large to properly vent the remaining attached appliances. The following vent testing procedure is reproduced from the American National Standard/National Standard of Canada for Gas- Fired Central Furnaces ANSI Z21.47, CSA-2.3 latest edition Section 1.23.1.

  • Page 9: Combustion

    & V OMBUSTION ENTILATION EQUIREMENTS WARNING Improved construction and additional insulation in buildings have O AVOID PROPERTY DAMAGE PERSONAL INJURY OR DEATH reduced heat loss by reducing air infiltration and escape around SUFFICIENT FRESH AIR FOR PROPER COMBUSTION AND VENTILATION OF doors and windows.

  • Page 10: Furnace Suspension

    URNACE USPENSION If suspending the furnace from rafters or joists, use 3/8" threaded rod and 2”x2”x1/8” angle iron as shown in the following diagram. The length of rod will depend on the application and the clearances necessary. If the furnace is installed in a crawl space it must be suspended from the floor joist or supported by a concrete pad.

  • Page 11: Vent/Flue Pipe & Combustion Air Pipe

    For installations above 7000 feet, please re- MANIFOLD PRESSURE PRESSSURE fer to the furnace Specification Sheets for ALTITUDE ORIFICE HIGH STAGE LOW STAGE SWITCH CHANGE required kit(s). #45 (1) NATURAL NONE 3.5" w.c. 1.9" w.c. NONE Contact the distributor for a tabular listing of #50 (2) appropriate manufacturer’s kits for propane 0 - 7000...

  • Page 12: Roper Ent Lue And Ombustion

    As an alternative to PVC pipe, primer, solvent cement, and fittings, ABS materials which are in compliance with the following specifications may be used. Two-or-three-inch ABS Schedule 40 pipe must meet ASTM D1527 and, if used in Canada, must be CSA listed.

  • Page 13: Canadian Venting Requirements

    • The vent termination of a non-direct vent application must terminate at least 4 feet below, 4 feet horizontally from, or 1 foot above any door, window, or gravity air inlet into any building. • The vent termination of a direct vent application must terminate at least 12 inches from any opening through which flue gases may enter a building (door, window, or gravity air inlet).

  • Page 14: Non -Direct Vent (Single Pipe ) Piping

    IRECT NSTALLATIONS WARNING A minimum of one 90° elbow should be installed on the combustion DGES OF SHEET METAL HOLES MAY BE SHARP SE GLOVES AS A air intake “coupling” to guard against inadvertent blockage. PRECAUTION WHEN REMOVING HOLE PLUGS LTERNATE OCATION The alternate vent/flue location is the large hole directly in line with the induced draft blower outlet.
  • Page 15 IRECT INGLE IPING Non-direct vent installations require only a vent/flue pipe. The vent pipe can be run horizontally with an exit through the side of the building or run vertically with an exit through the roof of the building. The vent can also be run through an existing unused chimney; however, it must extend a minimum of 12 inches above the top of the chimney.
  • Page 16 DOWN VENTING UPFLOW MODEL FURNACES ONLY Figure 11 Use alternate vent & combination air locations 6’ MAX. Vent Pipe Combustion Air Pipe Both Pipes Terminated Outside Structure Field Supplied Drain Tee on Vent Pipe 1/4” per foot min. slope Condensate trapped to prevent flue gas from escaping and routed to field supplied condensate disposal...
  • Page 17 IRECT IPING Direct vent installations require both a combustion air intake and a vent/flue pipe. The pipes may be run horizontally and exit through the side of the building or run vertically and exit through the roof of the building. The pipes may be run through an existing unused chimney;...

  • Page 18: Condensate Drain Lines & Drain Trap

    NTAKE ERMINATIONS NSTALLATION OF ULTIPLE IRECT URNACES If more than one direct vent furnace is to be installed vertically through a common roof top, maintain the same minimum clear- 3”MIN 24”MAX ances between the exhaust vent and air intake terminations of adjacent units as with the exhaust vent and air intake terminations 12”...

  • Page 19: Upflow Model Installed Vertically

    ENERAL RAIN NFORMATION All furnace models come with a factory installed drain trap. For vertical installations, the trap will remain in the factory posi- tion. All furnace models installed horizontally require the trap to be relocated. Many drain hoses have a built–in grommet which will provide a cabinet seal when installed.

  • Page 20: Drain Exiting Left Side

    RAIN XITING 1. Install the 45 degree pipe / hose drain coupling from the outside of the cabinet (barbed end goes in the cabinet) through the hole in the left side of the cabinet and secure with two field supplied #8 self-tapping screws (see Figure 21).

  • Page 21: Electrical Connections

    10. Connect hose #6 & hose #5 using 100º elbow and secure with two red clamps. 11. (Draining the Collector Box) Install the non-grommet end of hose #11 from outside the cabinet in the bottom drain hole. Install on collector box and secure with a silver clamp. 12.

  • Page 22: Volt Thermostat Wiring

    To ensure proper unit grounding, the ground wire should run from WARNING the furnace ground screw located inside the furnace junction box all the way back to the electrical panel. NOTE: Do not use gas O PREVENT PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK piping as an electrical ground.

  • Page 23: Single -Stage Heating Thermostat

    DI P INGLE TAGE EATING HERMOSTAT PPLICATION Function Switch Switch Purpos e A single-stage thermostat with only one heating stage may be Group Numbe r used to control this furnace. The application of a single-stage Auto 1 OFF* 2 ON* He at thermostat offers a timed transition from low to high fire.

  • Page 24: Gas Supply And Piping

    If it is necessary for the installer to supply additional line voltage wiring to the inside of the furnace, the wiring must conform to all local codes, and have a minimum temperature rating of 105°C. All line voltage wire splices must be made inside the furnace junction box. The integrated control module humidifier terminal (HUM) is energized with 115 volts when- ever the induced draft blower is energized.

  • Page 25: Gas Piping Connections

    the valve is configured for natural gas. The valve is field convertible for use with propane gas by replacing the regulator spring with a propane gas spring from an appropriate manufacturer’s propane gas conversion kit. Taps for measuring the gas supply pressure and manifold pressure are provided on the valve.

  • Page 26: Propane Gas Tanks And Piping

    cabinet per local codes. 1/2” NPT pipe and fittings are re- Burners Manual Shut Off Valve Alternate Manifold quired. For models with an “L” shaped manifold, a 4 1/2” (upstream from Gas Line ground joint Location long nipple is required. For models with a hook shaped mani- pipe union) fold, a 2”...

  • Page 27: Circulating Air & Filters

    Sizing Between First and Second Stage Regulator* Sizing Between Second or Second Stage Regulator & Appliance* Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting. Maximum Propane Capacities listed are based on 1/2” W.C. pressure drop at 11” W.C. setting. Capacities in 1,000 BTU/hour.

  • Page 28: Bottom Return Air Opening

    NOTE: Both readings may be taken simultaneously and read directly on the manometer if so desired. If an air conditioner coil or Electronic Air Cleaner is used in conjunction with the furnace, the readings must also include theses components, as shown in the following drawing. 4.

  • Page 29: Startup Procedure & Adjustment

    PRIGHT NSTALLATIONS Filter Sizing Chart Model Minimum Filter Size Depending on the installation and/or customer preference, differing filter arrangements can be applied. Filters can be installed in the cen- *MEC960302BN** 16 X 24 tral return register or a side panel external filter rack kit (upflows). As *MEC960402BN** 20 X 24 an alternative a media air filter or electronic air cleaner can be used as...

  • Page 30: Gas Supply Pressure Measurement

    UPPLY RESSURE EASUREMENT CAUTION RESSURE O PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE The line pressure supplied to the gas valve must be within the INLET GAS SUPPLY PRESSURE MUST BE AS SPECIFIED ON THE UNIT range specified below. The supply pressure can be measured at RATING PLATE WITH ALL OTHER HOUSEHOLD GAS FIRED APPLIANCES the gas valve inlet pressure tap or at a hose fitting installed in the OPERATING...

  • Page 31: Gas Manifold Pressurem

    ANIFOLD RESSURE EASUREMENT AND DJUSTMENT Gas Line Only small variations in gas pressure should be made by adjusting the gas valve pressure regulator. The manifold pressure must be measured with the burners Shutoff Valve operating. To measure and adjust the manifold pressure, use the following proce- dure.

  • Page 32: Gas Input Rate Measurement

    NPUT EASUREMENT ATURAL The actual gas input rate to the furnace must never be greater than that specified on the unit rating plate. To measure natural gas input using the gas meter, use the following procedure. 1. Turn OFF the gas supply to all other gas-burning appliances except the furnace. 2.

  • Page 33: Circulator Blower Speeds

    IRCULATOR LOWER PEEDS WARNING This furnace is equipped with a multi-speed ECM motor. Two O AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK wiring harnesses connect the motor to the integrated control TURN POWER TO THE FURNACE BEFORE CHANGING SPEED TAPS board and furnace power supply.
  • Page 34 DIP SWITCH SETTING *MEC960302BN CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM CFM CFM All DIP Switch Positions All DIP Switch Positions FACTORY All DIP Switch Positions SETTING OFF OFF OFF 1146 1097 1049 1002 ON OFF OFF ON ON OFF 1146 1097...
  • Page 35 DIP SWITCH SETTING *MEC960603BN CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM CFM CFM All DIP Switch Positions All DIP Switch Positions FACTORY W2 1328 40 All DIP Switch Positions 1287 41 1249 43 1215 44 1170 46 1131 1085 1046 SETTING OFF OFF OFF...
  • Page 36 DIP SWITCH SETTING *MEC961004CN CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM CFM CFM All DIP Switch Positions 1522 1464 1402 1338 1280 1230 1167 1101 W1 1522 41 All DIP Switch Positions 1464 43 1402 44 1338 47 1280 49 1230 1167 1101...

  • Page 37: Normal Sequence Of Operation

    LOWER ELAY IMINGS The integrated control module provides a selectable heat off delay function. The heat off delay period may be set to 90, 120, 150, 180 seconds using the DIP switches provided on the control module. The delay is factory shipped at 150 seconds but may be changed to suit the installation requirements and/or homeowner preference.

  • Page 38: Cooling Mode

    OOLING Low stage cooling Mode sequence: • On a call for lo cool, the YLO and G thermostat contacts close signaling the control module. • The LED will display a “GREEN”1 flash • The compressor and condenser fan are energized. The compressor is connected to the YLO terminal of the control module.

  • Page 39: Rollout Limit

    OLLOUT IMIT The rollout limit controls are mounted on the burner/manifold assembly and monitor the burner flame. They are normally-closed (electrically), manual-reset sensors. These limits guard against burner flames not being properly drawn into the heat exchanger. RESSURE WITCHES The pressure switches are normally-open (closed during operation) negative air pressure-activated switches. They monitor the airflow (combustion air and flue products) through the heat exchanger via pressure taps located on the induced draft blower and the coil front cover.

  • Page 40: Diagnostic Chart

    IAGNOSTIC HART Refer to the Troubleshooting Chart in the back of this manual for assistance in determining the source of unit operational problems. External Lockout A control lockout resulting from an external fault sensed by the control, such as an unsuccessful recycle or retry period, or a limit trip.

  • Page 41: Maintenance

    Depress the push button switch for approximately 2 seconds. Release the switch when the LED is turned off. The diagnostic LED will then display the flash codes associated with the last five detected faults. The order of display is the most recent fault to the least recent fault.

  • Page 42: Burners

    ORIZONTAL ILTER EMOVAL CAUTION Filters in horizontal installations are located in the central return O ENSURE PROPER UNIT PERFORMANCE ADHERE TO THE FILTER SIZES register or the ductwork near the furnace. GIVEN IN THE RECOMMENDED INIMUM ILTER ABLE OR To remove: PECIFICATION HEET APPLICABLE TO YOUR MODEL 1.

  • Page 43: Flue Passages

    ASSAGES UALIFIED ERVICER The heat exchanger flue passageways should be inspected at the beginning of each heating season. EFORE EAVING AN NSTALLATION • Cycle the furnace with the thermostat at least three times. Verify cooling and fan only operation. • Review the Owner’s Manual with the homeowner and discuss proper furnace operation and maintenance.
  • Page 44 ROUBLESHOOTING HART Green Amber Symptoms Fault Description Check Cautions LED Code LED Code LED Code •Defective disconnect switch •Determine cause and restore •Confirm electrically safe •Furnace fails to operate •defective door switch • No •None •None •None proper high and low volt power condition before •Control board LED is off 115 volt power •No 24 volt...

  • Page 45: Troubleshooting Chart

    ROUBLESHOOTING HART Associated Green Amber LED Code Symptoms Fault Description Check Cautions LED Code LED Code LED Code •Temperature rise, duct static, •Furnace does not •Four •Open limit circuit, main •Confirm electrically safe gas pressure, burner alignment, operate, four Red •None •None repeating...

  • Page 46: Wiring Diagram

    IRING IAGRAM WARNING:DISCONNECT POW ER BEFORE SERVICING. W IRING TO UNIT MUST BE PROPERLY POLARIZED AND GROUNDED. O 15V VI E W I I G TO U ND D ECM MTR HARNESS CIRCULATOR BLOWER EQUIPMENT GND FIELD GND FIELD SPLICE SW ITCH (TEMP.) IGNITER SW ITCH (PRESS.)

  • Page 47: Special Instructions For Products Installed In The State Of Massachusetts

    PECIAL NSTRUCTIONS FOR RODUCTS NSTALLED IN THE TATE OF ASSACHUSETTS For all side wall horizontally vented gas fueled equipment in- stalled in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or op- erated by the Commonwealth and where the side wall exhaust VENT/FLUE vent termination is less than seven (7) feet above finished grade...

  • Page 48: San Felipe Suite

    5151 San Felipe Suite 500 Houston, TX 77056 www.goodmanmfg.com • www.amana-hac.com © 2014 Goodman Manufacturing Company, L.P. is a registered trademark of Maytag Corporation or its related companies and is used under license to Goodman Company, L.P ., Houston, TX. All rights reserved.

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