Goodman Mfg MVC95 Is 30 seconds Non-CT compatible single stage AC unit, Networktroubleshooting

Page 46

COMFORTNET™ SYSTEM

NON-COMM (APPLIES ONLY TO A CT COMPATIBLE FURNACE MATCHED

WITH A NON-CT COMPATIBLE SINGLE STAGE AIR CONDITIONER)

Submenu Item

User Modifiable Options

Comments

Cool Airflow (CL CFM)

18, 24, 30, 36, 42, 48, or 60, default

Selects the airflow for the non-CT

 

is 18

compatible single stage AC unit

 

 

 

Cool Airflow Trim (CL TRM)

-10% to +10% in 2% increments,

Selects the airflow trim amount for the non-

 

default is 0%

CT compatible single stage AC unit

Cool Airflow Profile (CL PRFL)

A, B, C, or D, default is A

Selects the airflow profile for the non-CT

 

 

compatible single stage AC unit

Cool ON Delay (CL ON)

5, 10, 20, or 30 seconds, default is

Selects the indoor blower ON delay for the

 

5 seconds

non-CT compatible single stage AC unit

 

 

 

Cool OFF Delay (CL OFF)

30, 60, 90, or 120 seconds, default

Selects the indoor blower OFF delay for the

 

is 30 seconds

non-CT compatible single stage AC unit

 

 

 

THERMOSTAT MENU

If this furnace is installed with a CT compatible heat pump, the system is recognized as a dual fuel system. The balance point temperature should be set via the thermostat advanced menu. Navigate to the THERMOSTAT menu. Press the INSTALLER CONFIG key. Navigate to the SETUP menu and press the IN- STALLER CONFIG button. Navigate to dF BAL PNT. Adjust the dual fuel system balance point using the back/forward ar- rows.

DIAGNOSTICS

Accessing the furnace’s diagnostics menu provides ready ac- cess to the last six faults detected by the furnace. Faults are stored most recent to least recent. Any consecutively repeated fault is stored a maximum of three times. Example: A clogged return air filter causes the furnace limit to trip repeatedly. The control will only store this fault the first three consecutive times the fault occurs. Navigate to the diagnostics menu as described above in Accessing and Navigating the Advanced Features Menus.

NOTE: It is highly recommended that the fault history be cleared when performing maintenance or servicing the furnace.

NETWORKTROUBLESHOOTING

Communications is achieved by taking the difference between two dc signals. The signals and transmission lines are referred to as “data 1” and “data 2”. Each transmission line is biased to approximately 2.5Vdc. During data reception/transmission, the data lines vary between +5V and ground. (When data 1 is in- creasing towards +5V, data 2 is decreasing towards ground and when data 1 is decreasing towards ground, data 2 is increasing towards +5V. Typically, the data 1 line is approximately 2.6Vdc and the data 2 transmission line is approximately 2.3Vdc. The voltage difference between data 1 and data 2 is typically 0.2 to 0.6 Vdc.

The indoor control is equipped with a bank of three dipswitches that provide biasing and termination functions for the communi- cations transmission lines. The outdoor control in the CT™ compatible unit is equipped with a bank of two dipswitches that provide termination functions for the communications transmis- sion lines. Communications errors will result if these switches are not correctly set. The table below indicates the switch posi- tion for the bias and termination dipswitches along with the ex- pected voltages. Note that the ON position is the correct posi- tion for all bias and termination dipswitches.

OFF

ON

1

 

 

 

 

 

BIAS

 

 

 

 

 

2

 

 

 

 

 

BIAS

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

TERM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Indoor Unit BIAS and TERMINATION Dipswitches

The ComfortNet system is a fully communicating system, and thus, constitutes a network. Occasionally the need to trouble- shoot the network may arise. The integrated furnace control has some on-board tools that may be used to troubleshoot the net- work. These tools are: red communications LED, green receive (Rx) LED, and learn button.

•Red communications LED – Indicates the status of the network. The table below indicates the LED status and the corresponding potential problem.

•Green receive LED – Indicates network traffic. The table below indicates the LED status and the corresponding potential problem.

•Learn button – Used to reset the network. Depress the button for approximately 2 seconds to reset the network.

46

Page 45 Page 47
Image 46
Page 45 Page 47
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 ShippinginspectionProduct Description FeaturesProductapplication Location Requirements & Considerations Furnacesuspension ClearancesandaccessibilityExistingfurnaceremoval Combustion & Ventilation AIR Requirements Installation PositionsThermostatlocation Horizontal Applications & Considerations AlternateVent/FlueLocation RecommendedInstallationPositionsHorizontalFurnace Propane GAS/HIGH Altitude Installations VENT/FLUE Pipe & Combustion AIR PipePROPERVENT/FLUEANDCOMBUSTIONAIRPIPINGPRACTICES MaterialsandjoiningmethodsTerminationlocations 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 KITHose and Tube Identification Condensate Drain Lines & Drain TrapStandardrightorleftsidedrainhoseconnections UPRIGHTINSTALLATIONS-TRAPONRIGHTSIDE Drain Trap MountingExternally UPRIGHTINSTALLATIONS-TRAP on Leftside Horizontalinstallations Counterflow furnacesCut Junctionbox Relocation WiringharnessElectrical Connections 115VOLT Line Connections24VOLTTHERMOSTATWIRING Thermostat Wiring DiagramsSINGLE-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 ConnectionsCoupling Degree elbow Inch close nipple PropaneGasInstallationTypPropanegastanksandpiping 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 HeatingmodeCoolingmode Operational Checks & Safety Circuit DescriptionFanonlymode Safety Circuit Description Troubleshooting & Maintenance Operational ChecksTroubleshooting Maintenance Troubleshooting & 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.
Top Page Image Contents