Manuals / Lennox International Inc / Household Appliance / Gas Heater

Lennox International Inc Lennox Merit Series Gas Furnace Upflow/Horizontal Air Discharge End View

Models: Lennox Merit Series Gas Furnace Upflow/Horizontal Air Discharge ML193UH

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SETTING EQUIPMENT

UPFLOW APPLICA

TION

AIR FLOW

FRONT VIEW

	UNIT	UNIT
	UNIT	FRONT
	FRONT	FRONT
	FRONT
	AIR FLOW
		1/2”
	SIDE VIEW	max.
	SIDE VIEW	SIDE VIEW

HORIZONTAL APPLICATION

AIR FLOW

FRONT VIEW

UNIT

FRONT

1/2” max.

END VIEW

Unit must be level side-to-side. Unit may be positioned from level to 1/2” toward the front to aid in draining.

FIGURE 11

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Lennox International Inc Lennox Merit Series Gas Furnace Upflow/Horizontal Air Discharge Setting Equipment, Front View

Contents

INSTALLATION INSTRUCTIONS ML193UH Table of Contents2P0813 P507121-01SUPPLY AIR ML193UH Unit Dimensions - inches mmOPENING ML193UHDANGER Safety InformationML193UH Gas Furnace Shipping and Packing ListInstallation Locations Installed in Combination with a Cooling CoilUse of Furnace as Construction Heater Combustion, Dilution & Ventilation Air GeneralConfined Space Air from InsideUnconfined Space Air from Outside Shipping Bolt Removal Installation - Setting EquipmentUpflow Applications ML193UH090P48CUPFLOW APPLICA TION SETTING EQUIPMENTHORIZONTAL APPLICATION FRONT VIEWSide Return Air with transition and filter Return Air GuidelinesOptional Return Air Base Horizontal ApplicationsUpflow Applications Only Removing the Bottom PanelFIGURE Suspended Installation of Horizontal Unit Horizontal Application Installation ClearancesPlatform Installation of Horizontal Unit HORIZONTAL SUSPENSION KITFilters Pipe & Fittings SpecificationsDuct System FIGURE Return Air --Horizontal ApplicationsTABLE PIPING AND FITTINGS SPECIFICATIONS TABLE OUTDOOR TERMINATION USAGE Joint Cementing ProcedureDANGER DANGER OF EXPLOSIONPiping Suspension Guidelines Venting PracticesWall Thickness Guidelines FIGURE Exhaust Piping Figures 24 andExhaust Pipe Vent Piping GuidelinesPiping Size Process FIGURE TABLE MINIMUM VENT PIPE LENGTHSStandard Termination at Elevation 0 - 10,000 Attic or Crawl Space For Intake Air in FeetNumber Of 2” PipeNON-DIRECTVENT APPLICATIONS NON-DIRECTVENT APPLICATIONSPipe size determined in table RIGHT HAND DISCHARGE SHOWNAPPLICATIONS Pipe size determined in tableRIGHT HAND DISCHARGE SHOWN Intake Piping TYPICAL AIR INTAKE PIPE CONNECTIONSTYPICAL AIR INTAKE PIPE CONNECTIONS For Canadian Installations Only General Guidelines for Vent TerminationsWinter Design Temperatures1 F CVent Pipe Unit Input SizeINSIDE CORNER DETAIL VENT TERMINATION CLEARANCESINSIDE CORNER DETAIL VENT TERMINATION CLEARANCESdifferent pressure zones FIGURE Exiting Exhaust and Intake VentFIGURE Exiting Exhaust and Intake Vent different pressure zonesSide View FIELD FABRICATED WALL TERMINATION ML193UH DIRECT VENT APPLICATION USING EXISTING CHIMNEYML193UH NON-DIRECTVENT APPLICATION FIGURE Condensate PipingField Provided Drain Components Condensate Trap With Optional Overflow Switch Coil Using A Separate DrainTo Drain FIGURE ML193UH With EvaporatorIMPORTAN T ML193UH with Evaporator Coil Using a Common DrainML193UH with Evaporator Coil Using a Common Drain Drain ConnectionTRAP / DRAIN ASSEMBLY USING 1/2” PVC OR 3/4” PVC 1/2 inch3/4 inch Gas Piping LOW INLET PRESSURE SWITCHS145 LOCATION Leak CheckHorizontal Applications Possible Gas Piping ConfigurationsLeft Side Piping Standard Right Side Piping AlternateTABLE GAS PIPE CAPACITY - FT3/HR kL/HR Removal of the Furnace from Common VentCARBON MONOXIDE POISONING HAZARD INTERIOR MAKE-UPBOX INSTALLATION Precautions and ProceduresAccessory Terminals ElectricalGenerator Use - Voltage Requirements TYPICAL ML193UH WIRING DIAGRAMDIAGNOSTIC CODES Integrated Control Diagnostic CodesIntegrated Control INTEGRATED CONTROLPlacing the furnace into operation Unit Start-UpPriming Condensate Trap Gas Valve Operation FigureGAS METER CLOCKING CHART Gas Pressure AdjustmentFailure To Operate Heating Sequence Of OperationHigh Altitude Information Proper CombustionML193 UnitCARBON MONOXIDE POISONING HAZARD Flame Rollout Switches Two Other Unit AdjustmentsPressure Switch Temperature RiseFIELD WIRING FOR TWINNING Twinning the ML193UHCleaning the Burner Assembly ServiceBlower FiltersCabinet Parts Repair Parts ListHeating Parts Control Panel PartsTerminations Installed Properly Start-Up& Performance Check List UNIT SET UPHeat Cable Installed and Operable if applicable RETURN DUCT Sealed Filter Installed and CleanReturn Duct Temperature TEMPERATURE DROPSupply Duct Temperature TEMPERATURE RISEModifications to NFPA-54,Chapter Requirements for Commonwealth of MassachusettsEXEMPTIONS The following equipment is exempt from 24 CMR 5.082a 1 throughPage

SETTING EQUIPMENT

UPFLOW APPLICA­

FRONT VIEW

UNIT

FRONT

AIR FLOW

1/2”

SIDE VIEW

HORIZONTAL APPLICATION

UNIT

END VIEW

UPFLOW APPLICA