Lennox International Inc Gas Units, G61MP Series Units Heating Sequence of Operation

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Troubleshooting: Heating Sequence of Operation (Continued)

HEATING SEQUENCE OF OPERATION

CONTINUED

THERMOSTAT CALLS FOR HEAT

STATUS LED − HEARTBEAT.

(Refer to box A on previous page)

FIRST−STAGE (LOW FIRE) PRESSURE		NO		GAS VALVE OFF. COMBUSTION AIR INDUCER
FIRST−STAGE (LOW FIRE) PRESSURE				GAS VALVE OFF. COMBUSTION AIR INDUCER
SWITCH CLOSED WITHIN 2.5 MINUTES?				OFF. INDOOR BLOWER OFF. UNIT WILL RETRY
YES				AFTER 5−MINUTE WAIT PERIOD.
YES				STATUS ERROR CODE 2 + 3.
				STATUS ERROR CODE 2 + 3.

15−SECOND COMBUSTION AIR INDUCER
PRE−PURGE INITIATED BY CLOSED FIRST−STAGE
PRESSURE SWITCH (or 15 SECOND
INTER−PURGE PERIOD.)
STATUS LED −− HEARTBEAT.

IGNITOR WARM−UP (20 SECONDS)

STATUS LED −− HEARTBEAT.

YES

NO

COMBUSTION AIR INDUCER OFF, IGNITOR OFF.

IS IGNITOR INTACT AND CONNECTED?

SIGNAL HOLDS UNTIL IGNITOR IS REPLACED OR

RECONNECTED.

YES

STATUS ERROR CODE 4 + 7.

AT END OF IGNITOR 20 SECOND WARM UP

PERIOD, 4−SECOND TRIAL FOR IGNITION.

GAS VALVE OPENS, IGNITOR ENERGIZED DURING

4−SECOND TRIAL UNTIL FLAME SENSED.

YES

IS VOLTAGE ABOVE 90 VOLTS?

YES

NO

4−SECOND FLAME STABILIZATION PERIOD.

COMBUSTION AIR INDUCER OFF, IGNITER OFF.

NO

SIGNAL HOLDS UNTIL VOLTAGE RISES ABOVE 95

VOLTS. STATUS ERROR CODE 4 + 8.

FLAME RECTIFICATION CURRENT CHECK

CAN FLAME BE PROVEN WITHIN 4

GAS VALVE OFF. COMBUSTION AIR

SECONDS AFTER GAS VALVE OPENS?

INDUCER ON. INDOOR BLOWER OFF.

(u0.20 microamps)

STATUS LED −− HEARTBEAT.

HAS CONTROL FAILED TO SENSE

NO

FLAME FOR FIVE CONSECUTIVE TRIES

DURING A SINGLE HEAT DEMAND?

YES

WATCHGUARD MODE. GAS VALVE OFF,

COMBUSTION AIR INDUCER OFF.

YES

INDOOR BLOWER OFF.

STATUS ERROR CODE 4 + 1.

IS 60−MINUTE RESET PERIOD COMPLETE?

YES

NO

FLAME PRESENT?

HAS CONTROL RESET IGNITION SEQUENCE

NO

FOUR (4) TIMES?

YES

WATCHGUARD MODE.

STATUS ERROR CODE 4 + 3.

CONTINUED ON NEXT PAGE

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Image 58

Contents Installation Instructions Table of ContentsTOP View G61MP Unit Dimensions − inches mmFront View Side View TOP CAP Glass AssemblyG61MP Parts Arrangement Sight BlowerInstallation Safety InformationDirect Vent Installation NON−DIRECT Vent G61MP Gas FurnaceUse of Furnace as Construction Heater General Combustion, Dilution & Ventilation AirEquipment in Confined Space − ALL AIR from Inside Equipment operation Installation − Setting EquipmentEquipment in Confined Space − ALL AIR from Outside Side View Setting EquipmentFront View END ViewUpflow Applications Refer to Engineering Handbook for additional informationFront View Furnace FrontFurnace Locations Bottom Leveling Bolt Setting an Upflow UnitLeveling Bolt NON−COMBUSTIBLE Floor Opening SizeAdditive Base Floor Opening Size Side ViewTypical Horizontal Ceiling Application Blower Access PanelINTAKE/EXHAUST Connection Support Frame Drain PAN MIN Raised Platform Condensate Line Service Platform Exhaust Pipe GAS ConnectorIntake Pipe Filters Pipe & Fittings SpecificationsPiping and Fittings Specifications Duct SystemOutdoor Termination Kits and Corresponding Equivalencies Model DIAVent Piping Guidelines Minimum Vent Pipe Lengths Maximum Vent Pipe LengthsJoint Cementing Procedure MAX Plug Plastic strapping or a large wire tieVenting Practices TrapTypical Exhaust Pipe Connections From indoors and flue gases are discharged outdoors Direct Vent applications where combustion air is takenTransition Sweep ELL Intake Debris Screen Page Inside Corner Detail Inches 305mm or 12 in mmUS Installations1 Canadian Installations2 Direct Vent Roof Termination KIT Exhaust Pipe Termination Size ReductionG61MP TOP View Wall Ring KIT with Straight IntakeFront View Using Existing Chimney ANGLE−CUT in Direction G61MP Direct Vent ApplicationCondensate Piping G61MP NON−DIRECT Vent Application Using Existing ChimneySide View NON−DIRECT Vent Wall Ring Termination −RINGS CAP HI/LO Screws Condensate AssemblyCoupling CLEAN−OUT Access Vent Nipple TEEGas Piping Furnace Isolate GAS ValveHorizontal Applications Possible Gas Piping Configerations GAS Pipe Capacity − FT3/HR kL/HRElectrical Precautions and ProceduresInterior MAKE−UP BOX Installation Electrostatic Discharge ESDTypical G61MP Field Wiring Diagram Heat / 2 Cool Cut Intact OFF Cut IntactDIP Switches Function = Error Code Recall H= 24V Humidifier Output L= do not USETWO−STAGE Integrated Control Board Integrated Control Board DIP Switch Settings and Jumpers Typical G61MP Wiring Diagram Integrated Control Board For Your Safety Read Before OperatingUnit Start−Up White Rodgers 36E Series GAS Valve Honeywell VR8205 Series GAS ValveUrning Off Gas to Unit and call your service techni Gas Pressure AdjustmentIf the appliance will not operate, follow the instructions High Altitude Information Order TWO EachOther Unit Adjustments Carbon Monoxide Poisoning HazardPage Blower Performance Data 270In. w.g High Low Cfm Watts 2840 1450 In. w.g High Low Cfm Watts 2720 1385 In. w.g High Low Cfm Watts 2730 1465 Heating Sequence of Operation Service Electrical SHOCK, Fire Or Explosion HazardPage Planned Service Flash Code Status / Error Description Ignition Control Board Diagnostic Codes+ Y Troubleshooting Heating Sequence of Operation On NextHeating Sequence of Operation Thermostat Calls for Heat Status LED − HeartbeatU1.40 microamps Or Heat Demand is SATISFIED. a Five Troubleshooting Cooling Sequence of Operation Cooling Sequence of OperationRepair Parts List Troubleshooting Continuous Fan Sequence of OperationContinuous LOW Speed FAN Sequence of Operation G61MP Start−Up & Performance Check List Heat Anticipator Setting? Thermostat Level?Vent Pipe Sizing Worksheet − LP/Propane High Fire Manifold PressureRequirements for Commonwealth of Massachusetts LY BELOW. Keep Clear of ALL OBSTRUC- Tions

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Manual 8 pages 10.79 Kb

G61MP Series Units, Gas Units specifications

Lennox International Inc. has established itself as a leader in the heating and cooling industry, and its G61MP Series Gas Units stand as a testament to the company's commitment to innovation and energy efficiency. These gas units are specifically designed for residential applications and are recognized for their reliability, performance, and advanced technology.

One of the main features of the G61MP Series is its variable speed motor, which offers significantly enhanced comfort over traditional single-stage gas units. This technology allows for precise temperature control and improved humidity management. By adjusting its speed according to the heating demand, the unit minimizes temperature fluctuations, leading to a more consistent indoor climate.

Another notable characteristic of the G61MP Series is its ECM blower motor, which operates quietly and efficiently. This motor not only reduces energy consumption but also enhances the overall comfort of the home by providing a steady flow of warm air without the disruptive noise often associated with traditional gas units.

The G61MP Series units are designed with a focus on energy efficiency, boasting an impressive Annual Fuel Utilization Efficiency (AFUE) rating. This rating indicates that these units convert a significant portion of the fuel they consume into usable heat, resulting in lower energy bills for homeowners. The units are equipped with a modulating gas valve that further optimizes fuel usage by adjusting the gas flow according to the heating needs of the home.

Safety is a paramount consideration in the design of the G61MP Series. These units are built with advanced safety features, including a self-diagnostic control system that continuously monitors the unit’s performance. This system alerts homeowners to any potential issues, allowing for proactive maintenance and ensuring the longevity of the equipment.

The G61MP Series is also designed for ease of installation and servicing. Its compact design allows for flexible placement in various home environments, while the user-friendly access panels simplify routine maintenance tasks.

In conclusion, Lennox International Inc.'s G61MP Series Gas Units deliver a combination of advanced technology, energy efficiency, and reliability, making them an excellent choice for homeowners looking to enhance their heating systems. With features designed to maximize comfort, minimize energy costs, and ensure safety, these units represent a significant advancement in residential heating solutions.