Goodman Mfg GDS8, GHS8, GMS8 instruction manual XVI. Maintenance

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Use the following precautions during furnace installation and servicing to protect the integrated control module from damage. By putting the furnace, the control, and the person at the same electrostatic potential, these steps will help avoid exposing the integrated control module to electrostatic discharge. This procedure is applicable to both installed and uninstalled (ungrounded) furnaces.

1.Disconnect all power to the furnace. Do not touch the integrated control module or any wire connected to the control prior to discharging your body’s electrostatic charge to ground.

2.Firmly touch a clean, unpainted, metal surface of the furnace away from 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; (i.e., do not move or shuffle your feet, do not touch ungrounded objects, etc.). If you come in contact with an ungrounded object, repeat step 2 before touching control or wires.

4.Discharge your body to ground before removing a new control from its container. Follow steps 1 through 3 if installing the control on a furnace. Return any old or new controls to their containers before touching any ungrounded object.

DIAGNOSTIC CHART

Refer to the troubleshooting chart on the following pages for assistance in determining the source of unit operational problems. The red diagnostic LED blinks to assist in troubleshooting the unit. The number of blinks refer to a specific code.

ANNUAL INSPECTION

The furnace should be inspected by a qualified installer, or service agency at least once per year. This check should be performed at the beginning of the heating season. This will ensure that all furnace components are in proper working order and that the heating system functions appropriately. Pay particular attention to the following items. Repair or service as necessary.

Flue pipe system. Check for blockage and/or leakage. Check the outside termination and the connections at and internal to the furnace.

Heat exchanger. Check for corrosion and/or buildup within the heat exchanger passageways.

Burners. Check for proper ignition, burner flame, and flame sense.

Wiring. Check electrical connections for tightness and/or corrosion. Check wires for damage.

Filters.

FILTERS

WARNING

TO AVOID PROPERTY DAMAGE, PERSONAL INJURY OR DEATH, DISCONNECT ELECTRICAL POWER BEFORE REMOVING FILTERS. NEVER OPERATE FURNACE WITHOUT A FILTER INSTALLED BECAUSE DUST AND LINT WILL BUILD UP ON INTERNAL PARTS RESULTING IN LOSS OF EFFICIENCY, EQUIPMENT DAMAGE AND POSSIBLE FIRE.

A return air filter is not supplied with this furnace; however, there must be a means of filtering all of the return air. The installer will supply filter(s) at the time of installation.

RESETTING FROM LOCKOUT

Furnace lockout results when a furnace is unable to achieve ignition after three attempts, or when it has lost flame five times during a single call for heat. It is characterized by a non-functioning furnace and a one flash diagnostic LED code from the red LED. If the furnace is in “lockout”, it will (or can be) reset in any of the following ways.

1.Automatic reset. The integrated control module will automatically reset itself and attempt to resume normal operations following a one hour lockout period.

2.Manual power interruption. Interrupt 115 volt power to the furnace for 0 - 20 seconds.

3.Manual thermostat cycle. Lower the thermostat so that there is no longer a call for heat for 0 - 20 seconds then reset to previous setting.

NOTE: If the condition which originally caused the lockout still exists, the control will return to lockout. Refer to the Diagnostic Chart for aid in determining the cause.

XVI. MAINTENANCE

WARNING

TO AVOID ELECTRICAL SHOCK, INJURY OR DEATH, DISCONNECT ELECTRICAL POWER BEFORE PERFORMING ANY MAINTENANCE. IF YOU MUST HANDLE THE IGNITER, HANDLE WITH CARE. TOUCHING THE IGNITER ELEMENT WITH BARE FINGERS, ROUGH HANDLING, OR VIBRATION COULD DAMAGE THE IGNITER RESULTING IN PREMATURE FAILURE. ONLY A QUALIFIED SERVICER SHOULD EVER HANDLE THE IGNITER.

FILTER MAINTENANCE

Improper filter maintenance is the most common cause of inadequate heating or cooling performance. Filters should be cleaned (permanent) or replaced (disposable) every two months or as required. When replacing a filter, it must be replaced with a filter of the same type and size.

WARNING

TO PREVENT PROPERTY DAMAGE, PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK, DISCONNECT ELECTRICAL POWER TO THE FURNACE BEFORE REMOVING THE FILTER OR PERFORMING ANY OTHER MAINTENANCE.

Become familiar with filter location and procedures for removal, cleaning and replacing them. If help is needed, contact the installer of the furnace or a qualified servicer.

FILTER REMOVAL

Depending on the installation, differing filter arrangements can be applied. Filters can be installed in either the central return register or a side panel external filter rack (upflow only). A media air filter or electronic air cleaner can be used as an alternate filter. Follow the filter sizes given in the Recommended Minimum Filter size table to ensure proper unit performance.

To remove filters from an external filter rack in an upright upflow installation, follow the directions provided with external filter rack kit. To remove internal filters see Internal Filter Removal section. Internal filters are an accessory item and are not included with your furnace. For further details, see your distributor.

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Contents Installation & Operating Table of Contents XVI. Maintenance XII. Start-up Procedure and AdjustmentXIV. Safety Circuit Description XV. TroubleshootingTo the Owner II. SafetyTo the Installer Homeowner NoticeCSA International III. Product ApplicationAmerican National Standards Institute National Fire Protection AssociationIV. Location Requirements and Considerations National Fire Protection Association, IncGeneral Existing Furnace Removal Clearances and AccessibilityHorizontal Installation Suspended FurnaceZ223.1 Section General Thermostat InfluencesEquipment Located in Unconfined Spaces Equipment Located in Confined Spaces Space, UnconfinedModel Minimum Vent Specially Engineered InstallationsVI. Category I Venting Vertical Venting Louvers and GrillesTypical Multiple Flue Clay Tile Chimney Checklist SummaryVII. Exterior Masonry Chimneys Category I Furnaces only Upflow Rotated Induced Draft BlowerTermination 10 Feet Or Less From Ridge, Wall or Parapet Termination More Than 10 Feet From Ridge, Wall or ParapetCheck 1 Proper Chimney Termination Check 5 Liner Condition Check 4 Debris in CleanoutCheck 7 Complete the Installation Check 3 Chimney Crown ConditionFIX 4 Relining VIII. Electrical ConnectionsFIX 2 -CHANGE Venting Arrangements FIX 3 Rebuild the CrownFossil Fuiel Applications Wiring HarnessIntegrated Ignition Control Volt Line ConnectionsHeating Heating/Cooling Room Thermostat Typical Field Wiring 24 VAC Control CircuitVolt Thermostat Wiring Setting the Heat AnticipatorIX. GAS Supply and Piping TwinningHigh Altitude Derate Propane GAS Conversion Pressure Switch Changes Furnace input Kbtu/hr904BNA does not require a switch change Firing RateUpflow Installations General Furnace LayoutGAS Piping Connections General GAS Piping Checks Propane Gas Installation TypCounterflow Installations Propane GAS Piping ChartsCirculating AIR and Filters XI. Sequence of Operation Integrated Ignition ControlDuctwork Air XII. START-UP Procedure and Adjustment White-Rodgers Model 36F22White-Rodgers Model 36G22 WHITE-RODGERS 36F22 GAS Valve White-Rodgers Model 36G22Measuring Inlet Gas Pressure Alternate Method GAS Supply Pressure MeasurementGAS Input Rate Measurement Natural GAS only GAS Manifold Pressure Measurement and AdjustmentTemperature Rise Measurement Adjustment SwitchesXIII. Operational Checks XIV. Safety Circuit Description XV. TroubleshootingBurner Flame XVI. Maintenance Induced Draft and Circulator Blower Motors Flame Sensor Qualified Servicer onlyIgniter Qualified Servicer only Upright Filter RemovalTroubleshooting Chart Continuously Wiring Diagram for GMS8/GDS8/GHS8 Are Subject to Change Without Notice
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GMS8, GHS8, GDS8 specifications

Goodman Manufacturing, a well-reputed name in the HVAC industry, offers a comprehensive range of heating and cooling solutions. Among their notable products are the GDS8, GHS8, and GMS8 series, each designed to meet diverse customer needs while providing exceptional performance and energy efficiency.

The Goodman GDS8 gas furnace is known for its remarkable efficiency and reliability. Boasting an AFUE (Annual Fuel Utilization Efficiency) rating of up to 80%, the GDS8 converts a significant portion of fuel into usable heat, ensuring lower energy bills for homeowners. This model features a multi-speed blower motor that optimizes airflow, enhancing temperature consistency throughout the home, and reducing noise levels during operation. The GDS8 comes equipped with a durable heat exchanger crafted from high-quality steel, ensuring longevity and optimal heat transfer.

On the other hand, the GHS8 series represents Goodman’s commitment to high-efficiency heating. With an AFUE rating of up to 96%, the GHS8 is engineered for maximum performance. Its two-stage heating system allows for better temperature control, enabling the furnace to operate quietly and efficiently. Another standout feature is the ComfortBridge technology, which enhances the system’s ability to communicate and adapt to the home’s specific heating needs. This feature optimizes energy usage and increases comfort levels in any environment.

The Goodman GMS8 model is an exceptional choice for homeowners looking for a reliable gas furnace with a focus on energy efficiency. Similar to its counterparts, the GMS8 also delivers an AFUE of up to 96.5%. This unit features an advanced modulating gas valve that adjusts heating output based on the temperature requirements, creating a consistent and comfortable indoor climate. The GMS8 is also equipped with a high-efficiency ECM blower motor, which reduces energy consumption while improving airflow.

All three models feature Goodman’s quality construction, including a heavy-gauge cabinet that minimizes noise and enhances durability. They also are backed by Goodman’s limited lifetime warranty on the heat exchanger and a 10-year limited warranty on parts, providing customers with peace of mind regarding their investment. These furnaces are designed with efficiency and comfort in mind, making the GDS8, GHS8, and GMS8 ideal choices for homeowners looking to enhance their indoor environment while keeping energy costs in check.