Goodman Mfg GHS8, GDS8, GMS8 Heating Heating/Cooling Room Thermostat, Volt Thermostat Wiring

Page 16

WARNING

TO AVOID THE RISK 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.

To ensure proper unit grounding, the ground wire should run from the furnace ground screw located inside the furnace junction box all the way back to the electrical panel. NOTE: Do not use gas piping as an electrical ground. To confirm proper unit grounding, turn off the electrical power and perform the following check.

1.Measure resistance between the neutral (white) connection and one of the burners.

2.Resistance should measure 10 ohms or less.

This furnace is equipped with a blower door interlock switch which interrupts unit voltage when the blower door is opened for servicing. Do not defeat this switch.

24 VOLT THERMOSTAT WIRING

NOTE: Wire routing must not interfere with circulator blower operation, filter removal, or routine maintenance.

Low voltage connections can be made through either the right or left side panel. Thermostat wiring entrance holes are located in the blower compartment. The following figure shows connections for a “heat only” system and “heat/cool system”.

Heating

 

Heating/Cooling

 

 

Room Thermostat

Room Thermostat

 

W

 

W

Y

 

 

R

Y

G

R

Y

Y

 

R

 

C

R

 

 

 

 

 

 

C

 

 

C

C

 

G

 

 

G

Remote

 

 

 

 

 

•Wrap the “R” leg around a clip-on amp meter 10 times.

•Energize the furnace in the heat mode.

•Record the reading.

•Divide this reading by 10.

•Set the heat anticipator on the thermostat to match this reading.

Example: If the reading on the amp meter is “4”, divide this by 10. The anticipator setting will be .4 amps.

115 VOLT LINE CONNECTION OF ACCESSORIES (HUMIDIFIER AND ELECTRONIC AIR CLEANER)

WARNING

TO AVOID PERSONAL INJURY, ELECTRICAL SHOCK OR DEATH, DISCONNECT ELECTRICAL POWER BEFORE SERVICING OR CHANGING ANY ELECTRICAL WIRING.

The furnace integrated control module is equipped with line voltage accessory terminals for controlling power to an optional field-supplied humidifier and/or electronic air cleaner.

The accessory load specifications are as follows:

Humidifier

1.0 Amp maximum at 120 VAC

Electronic Air Cleaner

1.0 Amp maximum at 120 VAC

Turn OFF power to the furnace before installing any accessories. Follow the humidifier or air cleaner manufacturers’ instructions for locating, mounting, grounding, and controlling these accessories. Accessory wiring connections are to be made through the 1/4" quick connect terminals provided on the furnace integrated control module. The humidifier and electronic air cleaner hot and neutral terminals are identified as HUM and EAC. All field wiring must conform to applicable codes. Connections should be made as shown in the following illustration.

Control Module

W

 

W

Condensing

 

 

 

Furnace

Furnace

 

Unit

Control

Control

 

 

Typical Field Wiring (24 VAC Control Circuit)

This furnace is equipped with a 40 VA transformer to facilitate use with most cooling equipment. Consult the wiring diagram, located on the blower compartment door, for further details of 115 Volt and 24 Volt wiring.

Hot 120 VAC

EAC

 

 

 

Line

Transformer

Optional { Accessories

Neutral 120 VAC

Hum

Hum

 

EAC

Transformer

Line

 

 

 

 

 

 

 

Air Cleaner

Humidifier

A single-stage thermostat with only one heating stage can be used to control this furnace.

SETTING THE HEAT ANTICIPATOR

The following method should be used in measuring the amp draw of the control circuit to assure proper adjustment of the thermostat heat anticipator

R

R

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 terminals (HUM) are energized with 115 volts whenever the induced draft blower is energized. The integrated control module electronic air cleaner terminals (EAC) are energized with 115 volts whenever the circulator blower is energized.

IO-242C

16

05/05

Page 15 Page 17
Image 16
Page 15 Page 17
Contents Installation & Operating Table of Contents XII. Start-up Procedure and Adjustment XIV. Safety Circuit DescriptionXV. Troubleshooting XVI. MaintenanceII. Safety To the InstallerHomeowner Notice To the OwnerIII. Product Application American National Standards InstituteNational Fire Protection Association CSA InternationalNational Fire Protection Association, Inc IV. Location Requirements and ConsiderationsGeneral Clearances and Accessibility Horizontal InstallationSuspended Furnace Existing Furnace RemovalThermostat Influences Z223.1 Section GeneralEquipment Located in Unconfined Spaces Space, Unconfined Equipment Located in Confined SpacesSpecially Engineered Installations VI. Category I Venting Vertical VentingLouvers and Grilles Model Minimum VentChecklist Summary VII. Exterior Masonry Chimneys Category I Furnaces onlyUpflow Rotated Induced Draft Blower Typical Multiple Flue Clay Tile ChimneyTermination More Than 10 Feet From Ridge, Wall or Parapet Termination 10 Feet Or Less From Ridge, Wall or ParapetCheck 1 Proper Chimney Termination Check 4 Debris in Cleanout Check 7 Complete the InstallationCheck 3 Chimney Crown Condition Check 5 Liner ConditionVIII. Electrical Connections FIX 2 -CHANGE Venting ArrangementsFIX 3 Rebuild the Crown FIX 4 ReliningWiring Harness Integrated Ignition ControlVolt Line Connections Fossil Fuiel ApplicationsTypical Field Wiring 24 VAC Control Circuit Volt Thermostat WiringSetting the Heat Anticipator Heating Heating/Cooling Room ThermostatTwinning IX. GAS Supply and PipingHigh Altitude Derate Pressure Switch Changes Furnace input Kbtu/hr 904BNA does not require a switch changeFiring Rate Propane GAS ConversionGeneral Furnace Layout Upflow InstallationsGAS Piping Connections General Propane Gas Installation Typ Counterflow InstallationsPropane GAS Piping Charts GAS Piping ChecksXI. Sequence of Operation Integrated Ignition Control Circulating AIR and FiltersDuctwork Air White-Rodgers Model 36F22 XII. START-UP Procedure and AdjustmentWhite-Rodgers Model 36G22 White-Rodgers Model 36G22 Measuring Inlet Gas Pressure Alternate MethodGAS Supply Pressure Measurement WHITE-RODGERS 36F22 GAS ValveGAS Manifold Pressure Measurement and Adjustment GAS Input Rate Measurement Natural GAS onlyAdjustment Switches Temperature Rise MeasurementXIII. Operational Checks XV. Troubleshooting XIV. Safety Circuit DescriptionBurner Flame XVI. Maintenance Flame Sensor Qualified Servicer only Igniter Qualified Servicer onlyUpright Filter Removal Induced Draft and Circulator Blower MotorsTroubleshooting Chart Continuously Wiring Diagram for GMS8/GDS8/GHS8 Are Subject to Change Without Notice
Related manuals
Manual 16 pages 38.83 Kb

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.
Top Page Image Contents