Lennox International Inc G61MP Series Units, Gas Units Gas Piping, Furnace Isolate GAS Valve

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Gas Piping

CAUTION

If a flexible gas connector is required or allowed by the authority that has jurisdiction, black iron pipe shall be installed at the gas valve and extend outside

IMPORTANT

Compounds used on threaded joints of gas piping must be resistant to the actions of liquified petro-

leum gases.

the furnace cabinet.

WARNING

Do not exceed 600 in−lbs (50 ft−lbs) torque when at- taching the gas piping to the gas valve.

MANUAL MAIN SHUT−OFF VALVE WILL NOT HOLD NORMAL TEST PRESSURE

CAP

FURNACE

ISOLATE GAS VALVE

1 − Gas piping may be routed into the unit through either the left- or right-hand side. Supply piping enters into the gas valve from the side of the valve as shown in figure 48.

2 − When connecting gas supply, factors such as length of run, number of fittings and furnace rating must be con- sidered to avoid excessive pressure drop. Table 9 lists recommended pipe sizes for typical applications.

NOTE − Use two wrenches when connecting gas pip- ing to avoid transferring torque to the manifold.

3 − Gas piping must not run in or through air ducts, clothes chutes, chimneys or gas vents, dumb waiters or eleva- tor shafts. Center gas line through piping hole. Gas line should not touch side of unit. See figure 48.

4 − Piping should be sloped 1/4 inch per 15 feet (6mm per 5.6m) upward toward the gas meter from the furnace. The piping must be supported at proper intervals, ev- ery 8 to 10 feet (2.44 to 3.05m), using suitable hangers or straps. Install a drip leg in vertical pipe runs to serve as a trap for sediment or condensate.

5 − A 1/8" N.P.T. plugged tap or pressure post is located on the gas valve to facilitate test gauge connection. See figures 55 and 56.

6 − In some localities, codes may require installation of a manual main shut-off valve and union (furnished by in- staller) external to the unit. Union must be of the ground joint type.

FIGURE 46

Leak Check

After gas piping is completed, carefully check all piping

connections (factory− and field−installed) for gas leaks. Use a leak detecting solution or other preferred means.

The furnace must be isolated from the gas supply system

by closing its individual manual shut-off valve during any pressure testing of the gas supply system at pressures less than or equal to 1/2 psig (3.48 kPa, 14 inches w.c.).

IMPORTANT

When testing pressure of gas lines, gas valve must

be disconnected and isolated. See figure 46. Gas valves can be damaged if subjected to pressures greater than 1/2 psig (3.48 kPa).

WARNING

FIRE OR EXPLOSION HAZARD

Failure to follow the safety warnings exactly could result in serious injury, death, or property damage. Never use an open flame to test for gas leaks. Check all connections using a commercially available soap solution made specifically for leak detection.Some soaps used for leak detection are corrosive to certain metals. Carefully rinse piping thoroughly after leak test has been completed.

Upflow Application

Left Side Piping

(Standard)

MANUAL

MAIN SHUT−OFF

VALVE

GROUND

JOINT

UNION

DRIP LEG

AUTOMATIC GAS VALVE (with manual shut−off valve)

FIELD

PROVIDED

AND INSTALLED

Upflow Application

Right Side Piping

(Alternate)

MANUAL

MAIN SHUT−OFF

VALVE

GROUND

JOINT

UNION

DRIP LEG

FIGURE 47

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Contents Table of Contents Installation InstructionsG61MP Unit Dimensions − inches mm TOP ViewFront View Side View G61MP Parts Arrangement Glass AssemblyTOP CAP Sight BlowerDirect Vent Installation NON−DIRECT Vent Safety InformationInstallation G61MP Gas FurnaceUse of Furnace as Construction Heater Combustion, Dilution & Ventilation Air GeneralEquipment in Confined Space − ALL AIR from Inside Installation − Setting Equipment Equipment operationEquipment in Confined Space − ALL AIR from Outside Front View Setting EquipmentSide View END ViewRefer to Engineering Handbook for additional information Upflow ApplicationsFurnace Front Front ViewLeveling Bolt Setting an Upflow UnitFurnace Locations Bottom Leveling Bolt NON−COMBUSTIBLE Floor Opening SizeSide View Additive Base Floor Opening SizeBlower Access Panel Typical Horizontal Ceiling ApplicationINTAKE/EXHAUST Connection Support Frame Drain PAN Exhaust Pipe GAS Connector MIN Raised Platform Condensate Line Service PlatformIntake Pipe Piping and Fittings Specifications Pipe & Fittings SpecificationsFilters Duct SystemModel DIA Outdoor Termination Kits and Corresponding EquivalenciesVent Piping Guidelines Maximum Vent Pipe Lengths Minimum Vent Pipe LengthsJoint Cementing Procedure Venting Practices Plastic strapping or a large wire tieMAX Plug TrapTypical Exhaust Pipe Connections Direct Vent applications where combustion air is taken From indoors and flue gases are discharged outdoorsTransition Sweep ELL Intake Debris Screen Page Inches 305mm or 12 in mm Inside Corner DetailUS Installations1 Canadian Installations2 G61MP Exhaust Pipe Termination Size ReductionDirect Vent Roof Termination KIT TOP View Wall Ring KIT with Straight IntakeFront View G61MP Direct Vent Application Using Existing Chimney ANGLE−CUT in DirectionG61MP NON−DIRECT Vent Application Using Existing Chimney Condensate PipingSide View NON−DIRECT Vent Wall Ring Termination Coupling CLEAN−OUT Access Condensate Assembly−RINGS CAP HI/LO Screws Vent Nipple TEEFurnace Isolate GAS Valve Gas PipingGAS Pipe Capacity − FT3/HR kL/HR Horizontal Applications Possible Gas Piping ConfigerationsInterior MAKE−UP BOX Installation Precautions and ProceduresElectrical Electrostatic Discharge ESDTypical G61MP Field Wiring Diagram Heat / 2 Cool Cut Intact Cut Intact OFF= Error Code Recall H= 24V Humidifier Output L= do not USE DIP Switches FunctionTWO−STAGE Integrated Control Board Integrated Control Board DIP Switch Settings and Jumpers Typical G61MP Wiring Diagram For Your Safety Read Before Operating Integrated Control BoardUnit Start−Up Honeywell VR8205 Series GAS Valve White Rodgers 36E Series GAS ValveGas Pressure Adjustment Urning Off Gas to Unit and call your service techniIf the appliance will not operate, follow the instructions Order TWO Each High Altitude InformationCarbon Monoxide Poisoning Hazard Other Unit AdjustmentsPage 270 Blower Performance DataIn. 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 Electrical SHOCK, Fire Or Explosion Hazard ServicePage Planned Service Ignition Control Board Diagnostic Codes Flash Code Status / Error Description+ Y On Next Troubleshooting Heating Sequence of OperationThermostat Calls for Heat Status LED − Heartbeat Heating Sequence of OperationU1.40 microamps Or Heat Demand is SATISFIED. a Five Cooling Sequence of Operation Troubleshooting Cooling Sequence of OperationTroubleshooting Continuous Fan Sequence of Operation Repair Parts ListContinuous LOW Speed FAN Sequence of Operation Vent Pipe Sizing Worksheet Heat Anticipator Setting? Thermostat Level?G61MP Start−Up & Performance Check List − LP/Propane High Fire Manifold PressureLY BELOW. Keep Clear of ALL OBSTRUC- Tions Requirements for Commonwealth of Massachusetts
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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.
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