Lennox International Inc G61MP Series Units Minimum Vent Pipe Lengths, Maximum Vent Pipe Lengths

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Use the following steps to correctly size vent pipe diameter. Refer to Vent Pipe Size Determination Worksheet on page 53.

1 − Determine the vent termination and its corresponding equivalent feet value according to table 5.

2 − Determine the number of 90° elbows required for both indoor and outdoor (e.g. snow riser) use. Calculate the corresponding equivalent feet of vent pipe.

3 − Determine the number of 45° elbows required for both indoor and outdoor use. Calculate the corresponding equivalent feet of vent pipe.

4 − Determine the length of straight pipe required.

5 − Add the total equivalent feet calculated in steps 1 through 4 and compare that length to the maximum values given in table 6 for the proposed vent pipe di- ameter. If the total equivalent length required exceeds the maximum equivalent length listed in the appropri- ate table, evaluate the next larger size pipe.

TABLE 6

MINIMUM VENT PIPE LENGTHS

G61MP

MIN. EQUIV.

EXAMPLE

MODEL

VENT LENGTH

 

 

 

 

045, 070,

 

5 ft. plus 2 elbows of 2", 2−1/2", 3"

071, 090,

 

 

or 4" diameter pipe

091

 

 

 

 

 

 

110, 111**

15 ft.*

5 ft. plus 2 elbows of 2−1/2" 3" or 4"

 

diameter pipe

 

 

135***

 

5 ft. plus 2 elbows of 3" or 4"

 

diameter pipe

 

 

 

 

 

*Any approved termination may be added to the minimum equivalent length listed.

**G61MP−48C−110, G61MP−60C−110 and G61MP−60C−111 must have 90° street ell (supplied or field replacment Canadian kit) installed directly into unit flue collar.

***G61MP−60D−135 must have 3" to 2" reducing ell (supplied or field replac- ment Canadian ki) installed directly into unit flue collar.

TABLE 7

MAXIMUM VENT PIPE LENGTHS

 

 

MAXIMUM EQUIVALENT VENT

ALTITUDE

G61MP

 

LENGTH FEET

 

 

 

 

 

MODEL

2"

2−1/2"

3"

4"

 

 

 

PIPE

PIPE

PIPE

PIPE

 

 

 

 

 

 

 

045

59

65

77

234

 

070

59

65

78

214

 

071†

59

65

78

214

0 − 4500

090

26

42

72

204

(0 − 1371 m)

091†

26

42

72

204

 

110*

n/a

32

72

179

 

111*†

n/a

32

72

179

 

135**‡

n/a

n/a

61

160

 

045

59

65

77

234

 

070

59

65

78

214

 

071†

59

65

78

214

4501−7500

090

26

42

72

204

(1372−2286 m)

091†

26

42

72

204

 

110*

n/a

32

72

179

 

111*†

n/a

32

72

179

 

135**‡

n/a

n/a

46

160

 

045

59

65

77

234

 

070

59

65

78

214

 

071†

59

65

78

214

7501 − 10000

090

26

42

72

204

(2287 − 3048 m)

091†

26

42

72

204

 

110*

n/a

32

72

179

 

111*†

n/a

32

72

179

 

135**‡

n/a

n/a

46

160

n/a −− Not allowed.

*G61MP−48C−110, G61MP−60C−110 and G61MP−60C−111must have 90° street ell (supplied or field replacment Canadian ki) installed directly into unit flue collar.

**G61MP−60D−135 must have 3" to 2" reducing ell (supplied or field replacment Canadian ki) installed directly into unit flue collar.

***90° elbows used in configuration of G61MP−60D−135 vent, must be lim- ited to 3" sweep elbows.

†On G61MP−071, −091 and −111 units, sweep elbows must be used for all 90° elbows in the venting system when 2", 2−1/2" or 3" vent pipe is used. Sweep elbows are recommended for use in vent systems of other G61MP units.

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Contents Table of Contents Installation InstructionsTOP View G61MP Unit Dimensions − inches mmFront View Side View Sight Blower Glass AssemblyG61MP Parts Arrangement TOP CAPG61MP Gas Furnace Safety InformationDirect Vent Installation NON−DIRECT Vent InstallationUse of Furnace as Construction Heater Combustion, Dilution & Ventilation Air GeneralEquipment in Confined Space − ALL AIR from Inside Equipment operation Installation − Setting EquipmentEquipment in Confined Space − ALL AIR from Outside END View Setting EquipmentFront View Side ViewRefer to Engineering Handbook for additional information Upflow ApplicationsFurnace Front Front ViewNON−COMBUSTIBLE Floor Opening Size Setting an Upflow UnitLeveling Bolt Furnace Locations Bottom Leveling BoltSide View Additive Base Floor Opening SizeTypical Horizontal Ceiling Application Blower Access PanelINTAKE/EXHAUST Connection Support Frame Drain PAN MIN Raised Platform Condensate Line Service Platform Exhaust Pipe GAS ConnectorIntake Pipe Duct System Pipe & Fittings SpecificationsPiping and Fittings Specifications FiltersModel DIA Outdoor Termination Kits and Corresponding EquivalenciesVent Piping Guidelines Maximum Vent Pipe Lengths Minimum Vent Pipe LengthsJoint Cementing Procedure Trap Plastic strapping or a large wire tieVenting Practices MAX PlugTypical 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 Inches 305mm or 12 in mm Inside Corner DetailUS Installations1 Canadian Installations2 TOP View Wall Ring KIT with Straight Intake Exhaust Pipe Termination Size ReductionG61MP Direct Vent Roof Termination KITFront View G61MP Direct Vent Application Using Existing Chimney ANGLE−CUT in DirectionCondensate Piping G61MP NON−DIRECT Vent Application Using Existing ChimneySide View NON−DIRECT Vent Wall Ring Termination Vent Nipple TEE Condensate AssemblyCoupling CLEAN−OUT Access −RINGS CAP HI/LO ScrewsFurnace Isolate GAS Valve Gas PipingGAS Pipe Capacity − FT3/HR kL/HR Horizontal Applications Possible Gas Piping ConfigerationsElectrostatic Discharge ESD Precautions and ProceduresInterior MAKE−UP BOX Installation ElectricalTypical G61MP Field Wiring Diagram Heat / 2 Cool Cut Intact Cut Intact OFFDIP 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 Honeywell VR8205 Series GAS Valve White Rodgers 36E Series GAS ValveUrning Off Gas to Unit and call your service techni Gas Pressure AdjustmentIf 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 Flash Code Status / Error Description Ignition Control Board Diagnostic Codes+ 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 OperationRepair Parts List Troubleshooting Continuous Fan Sequence of OperationContinuous LOW Speed FAN Sequence of Operation − LP/Propane High Fire Manifold Pressure Heat Anticipator Setting? Thermostat Level?Vent Pipe Sizing Worksheet G61MP Start−Up & Performance Check ListLY 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.

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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.