Goodman Mfg MVC95 Comfortnet System, Heat Off Delay Dipswitches, Blowerheat Offdelay Timings

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COMFORTNET™ SYSTEM

7.Select the heating speed for your model from the heating speed chart in the Specification Sheet. The adjust setting (already established by the cooling speed selection) determines which set of speeds are available. The selected speed must provide a temperature rise within the rise range listed with the particular model.

Example: The *MVC950704CX is set for 990 CFM on cooling, the “ADJUST” is set to “+” (plus). The four heating speeds available are “A Plus”, “B Plus”, “C Plus”, and “D Plus”. “A Plus” has a rise of 46°F for both stages which is within the30-60°Friserangeforthe*MVC950704CX. This setting will keep electrical consumption to a minimum. Set the “Heat” speed DIP switches to “A”.

Sw itch Bank: S4

Heating Speed

DIP Sw itch No.

Taps

7

8

A

OFF

OFF

B*

ON

OFF

C

OFF

ON

D

ON

ON

(*Indicates factory setting)

8.Select the desired “heating” speed tap by positioning switches 7 and 8 appropriately. Refer to figure above. Verify CFM by noting the number displayed on the dual 7-segment LED display.

In general lower heating speeds will: reduce electrical consump- tion, lower operating sound levels of the blower, and increase the outlet air temperature delivered to the home. The speeds avail- able allow the blower performance to be optimized for the particu- lar homeowner’s needs.

BLOWERHEAT OFFDELAY TIMINGS

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 or jumper 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. Refer to the following figures for switch positions and corresponding delay times.

Switch Bank: S1

Heat OFF Delay

DIP Switch No.

 

 

1

2

 

90 seconds

OFF

OFF

120 seconds

ON

OFF

150 seconds*

OFF

ON

180 seconds

ON

ON

(*Indicates factory setting)

Heat Off Delay Dipswitches

COMFORTNET™ SYSTEM

OVERVIEW

The ComfortNet system (or CT™ system) is a system that in- cludes a ComfortNet compatible furnace and air conditioner or heat pump with a CTK01AAthermostat. A valid ComfortNet sys- tem could also be a compatible furnace, CTK01AA thermostat and non-compatible, single stage air conditioner. Any other sys- tem configurations are considered invalid ComfortNet systems and must be connected as a traditional (or legacy) system (see Elec- trical Connections for wiring connections). The table below com- pares the valid CT systems.

CT compatible

CT compatible

Full CT system

Furnace

Air Conditioner

benefits and features

 

 

 

CT compatible

CT compatible

Full CT system

Furnace

Heat Pump

benefits and features

CT compatible

Non-CT compatible

CT system

Single Stage

benefits and features

Furnace

Air Conditioner

for furnace only

 

 

 

 

A ComfortNet heating/air conditioning system differs from a legacy/ traditional system in the manner in which the indoor unit, outdoor unit and thermostat interact with one another. In a traditional sys- tem, the thermostat sends commands to the indoor and outdoor units via analog 24 VAC signals. It is a one-way communication path in that the indoor and outdoor units typically do not return information to the thermostat.

On the other hand, the indoor unit, outdoor unit, and thermostat comprising a ComfortNet system “communicate” digitally with one another. It is now a two-way communications path. The thermo- stat still sends commands to the indoor and outdoor units. How- ever, the thermostat may also request and receive information from both the indoor and outdoor units. This information may be dis- played on the CT thermostat. The indoor and outdoor units also interact with one another. The outdoor unit may send commands to or request information from the indoor unit. This two-way digital communications between the thermostat and subsystems (indoor/ outdoor unit) and between subsystems is the key to unlocking the benefits and features of the ComfortNet system.

Two-way digital communications is accomplished using only two wires. The thermostat and subsystem controls are power with 24 VAC. Thus, a maximum of 4 wires between the equipment and thermostat is all that is required to operate the system.

AIRFLOW CONSIDERATIONS

Airflow demands are managed differently in a fully commu- nicating system than they are in a legacy wired system. The system operating mode (as determined by the thermo- stat) determines which unit calculates the system airflow demand. If the indoor unit is responsible for determining the airflow demand, it calculates the demand and sends it to the ECM motor. If the outdoor unit or thermostat is responsible for determining the demand, it calculates the

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Contents Type FSP Category IV Direct or Non Direct Vent Air Furnace Product Description Normal Sequence of Operation Troubleshooting Safety Precautions What to do if YOU Smell GASProduct Description & Application ElectrostaticdischargeesdprecautionsTotheinstaller ShippinginspectionFeatures Product DescriptionProductapplication Location Requirements & Considerations Clearancesandaccessibility FurnacesuspensionExistingfurnaceremoval Installation Positions Combustion & Ventilation AIR RequirementsThermostatlocation AlternateVent/FlueLocation RecommendedInstallationPositions Horizontal Applications & ConsiderationsHorizontalFurnace Propane GAS/HIGH Altitude Installations VENT/FLUE Pipe & Combustion AIR PipeMaterialsandjoiningmethods PROPERVENT/FLUEANDCOMBUSTIONAIRPIPINGPRACTICESTerminationlocations Canadianventingrequirements Increased Clearance ConfigurationVent Termination Clearances StandardfurnaceconnectionsVent/FluePipeCuts AlternatefurnaceconnectionsRemove Pipe Relocate Upflow NON-DIRECTVENTSINGLEPIPEPIPINGHorizontalTerminationSinglePipe Vertical Termination Single PipeAlternate Vertical Termination Single Pipe DirectventdualpipepipingVertical Terminations Dual Pipe Standard Horizontal Terminations Dual PipeConcentricventtermination Alternate Horizontal Vent Termination Dual PipeHorizontalVentingOfMultipleUnits Side Wall Vent KITCondensate Drain Lines & Drain Trap Hose and Tube IdentificationStandardrightorleftsidedrainhoseconnections UPRIGHTINSTALLATIONS-TRAPONRIGHTSIDE Drain Trap MountingExternally UPRIGHTINSTALLATIONS-TRAP on Leftside Horizontalinstallations Counterflow furnacesCut Junctionbox Relocation WiringharnessElectrical Connections 115VOLT Line ConnectionsThermostat Wiring Diagrams 24VOLTTHERMOSTATWIRINGSINGLE-STAGE Heatingthermostatapplication Accessory load specifications are as follows Fossilfuelapplications24VOLTHUMIDIFIER Accessories WiringGAS Supply and Piping HighaltitudederateGaspipingconnections Natural Gas Capacity of Pipe Cubic Feet of Gas Per Hour CFHHorizontal Upflow Model Gas Piping ConnectionsPropaneGasInstallationTyp Coupling Degree elbow Inch close nipplePropanegastanksandpiping Duct Work -AIR Flow Propane Gas Piping ChartCirculating AIR & Filters Checking Duct StaticDuctFlangeCutOuts Consult proper tables for the quantity of airChecking Static Pressure 80% Furnace Shown, 90% Similar BottomreturnairopeningupflowmodelsStartup Procedure & Adjustment Startup Procedure &ADJUSTMENTFollowing figure shows possible filter locations If you smell gas after five minutes, immediately follow TemperatureSet the thermostat to the lowest setting White-Rodgers Model 36G54 Two-StageHoneywell Model VR9205 Connected to Manometer GasmanifoldpressuremeasurementandadjustmentTurn on the gas supply Measuring Inlet Gas Pressure Alt. MethodTemperaturerise GasinputratemeasurementnaturalgasonlyTemperature Rise Measurement CirculatorblowerspeedsAirflowTable Comfortnet System Heat Off Delay DipswitchesBlowerheat Offdelay Timings OverviewSystem Wiring using Four-Wires System System OperatingPear. Use Touch To step through the list of installed equipComfortnetsystemadvancedfeatures Value. TouchConfiguration Networktroubleshooting Is 30 seconds Non-CT compatible single stage AC unitNormal Sequence of Operation SystemtroubleshootingPower UP HeatingmodeOperational Checks & Safety Circuit Description CoolingmodeFanonlymode Troubleshooting & Maintenance Operational Checks Safety Circuit DescriptionTroubleshooting Troubleshooting & Maintenance MaintenanceFollow the manufacturer’s directions for service Induced Draft Blower Transformer Door Switch Before Leaving AN InstallationRepair and Replacement Parts MiscellaneousDIP Switches BankTroubleshooting Chart InternalLimit Chart MessageInvalid Trips Status Codes Wiring Diagram CVC9AA, *MVC95AACVC9AB, *MVC95AB

MVC95, CVC9/95 specifications

Goodman Manufacturing has established itself as a leader in the HVAC industry, and among its stellar lineup, the Goodman CVC9/95 and MVC95 stand out for their remarkable features, technologies, and efficiency.

The Goodman CVC9/95 is a high-performance gas furnace, designed for homeowners seeking reliability and cost-effective heating solutions. It operates with an impressive 95% Annual Fuel Utilization Efficiency (AFUE), which means that a significant portion of the fuel it consumes is converted into heat. This level of efficiency not only contributes to lower energy bills but also reduces greenhouse gas emissions, making it an environmentally friendly choice.

One of the standout features of the CVC9/95 is its multi-speed ECM blower motor. This technology adjusts the airflow according to the heating demands of the home, ensuring consistent and comfortable temperatures. The ECM motor also operates quietly, enhancing the comfort of your living space without the disruptive noise often associated with traditional furnaces.

The MVC95, on the other hand, offers similar efficiency with its also 95% AFUE rating. This model is equipped with a patented ignition system that enhances reliability with minimal maintenance needs. Its durable construction includes a heavy-gauge steel cabinet and an insulated blower compartment that minimizes heat loss. This design not only supports optimal performance but also contributes to its longevity.

Both models come with a self-diagnostic control board that provides straightforward troubleshooting capabilities, making it easier for technicians to ensure that your system is operating at peak performance. This feature aids in timely maintenance, which is crucial for extending the lifespan of the unit.

Additionally, Goodman backs their products with a strong warranty, offering a lifetime limited warranty on the heat exchanger and a 10-year limited parts warranty. This assurance provides homeowners peace of mind regarding their investment.

In the landscape of HVAC solutions, the Goodman CVC9/95 and MVC95 models exemplify a commitment to quality, efficiency, and advanced technology. Whether for new constructions or replacements, these furnaces offer superior heating performance coupled with modern conveniences, making them an invaluable choice for homeowners seeking effective climate control solutions. With their low emissions and high efficiency, choosing Goodman means investing in both comfort and sustainability.
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