Page 2 - Optional External Side Return Air Filter Kit is not for use
Page 2 ML193UH Unit Dimensions - inches (mm) 6−9/16 (167) Left 9 (229) Right 23 (584) (19) 3/4 (19) 1 Bottom Return Air Opening GAS PIPING INLET (Either Side) Side ReturnAir Opening(Either Side) 1 Bottom Return Air Opening EXHAUST AIR OUTLET ELECTRICAL INLET (Either Side) SUPPLY AIR OPENING FRONT VI...
Page 3 - FIGURE 1; FIGURE 2; Shipping and Packing List; Package 1 of 1 contains; Safety Information; WARNING; DANGER; Building Codes
Page 3 ML193UH Gas Furnace The ML193UH Category IV gas furnace is shipped readyfor installation in the upflow or horizontal position. The furnace is shipped with the bottom panel in place. The bottompanel must be removed if the unit is to be installed in horizontal or upflow applications with bott...
Page 4 - Heating Unit Installed Upstream of Cooling Coil; Gas Unit; NOTE; Use of Furnace as Construction Heater
Page 4 Gas Code is available from the following address: American National Standards Institute, Inc.11 West 42nd StreetNew York, NY 10036 In Canada, installation must conform with current NationalStandard of Canada CSA‐B149 Natural Gas and PropaneInstallation Codes, local plumbing or waste water cod...
Page 5 - General; CAUTION; Product contains fiberglass wool.
Page 5 D Air filters must be replaced upon construction completion. D The input rate and temperature rise must be set per thefurnace rating plate. D One hundred percent (100%) outdoor air must be provided for combustion air requirements during construction. Temporary ducting may supply outdoor ai...
Page 6 - In Canada, refer to the CSA B149 installation codes.; Unconfined Space; must be; Air from Inside
Page 6 will build to the point that a downdraft can occur in the furnace vent pipe or chimney. As a result, combustion gasesenter the living space creating a potentially dangerous situation. In the absence of local codes concerning air for combus-tion and ventilation, use the guidelines and proced...
Page 7 - FIGURE 6; FIGURE 7; * See table 6 for maximum vent lengths
Page 7 Air from Outside If air from outside is brought in for combustion and ventilation, the confined space shall be provided with two permanent openings. One opening shall be within 12” (305mm) ofthe top of the enclosure and one within 12” (305mm) of thebottom. These openings must communicate di...
Page 8 - FIGURE 8; FIGURE 9; Shipping Bolt Removal; The bolt and washer must be re; Af; RIGID LEG; with 1/2 HP Blower Motor; Installation - Setting Equipment; Upflow Applications; The unit
Page 8 FIGURE 8 EQUIPMENT IN CONFINED SPACE - ALL AIR FROM OUTSIDE (All Air Through Ventilated Attic) NOTE -The inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645mm 2 per 1.17kW) per hour of the total input rating of all equipment in the enclosur...
Page 9 - SETTING EQUIPMENT; UPFLOW APPLICA
Page 9 FIGURE 11 SETTING EQUIPMENT UPFLOW APPLICA TION HORIZONTAL APPLICATION FRONT VIEW SIDE VIEW FRONT VIEW END VIEW UNIT FRONT AIR FLOW UNIT FRONT 1/2” max. 1/2” max. AIR FLOW AIR FLOW SIDE VIEW UNIT FRONT Unit must be level side-to-side. Unit may be positioned from level to 1/2” toward the fron...
Page 10 - Installation Clearances; Return Air Guidelines; Refer to Engineering Handbook for additional information.; Side Return Air; Return
Page 10 WARNING Improper installation of the furnace can result in personal injury or death. Combustion and flue productsmust never be allowed to enter the return air systemor air in the living space. Use sheet metal screws andjoint tape to seal return air system to furnace.In platform installation...
Page 11 - SIDE RETURN; Screw; Removing the Bottom Panel; Horizontal Applications; Front
Page 11 FIGURE 14 Optional Return Air Base (Upflow Applications Only) NOTE- Optional side return air filter kits are not for use with return air base. 1 Both the unit return air opening and the base return air opening must be covered by a single plenum or IAQ cabinet.Minimum unit side return air ope...
Page 12 - Left End; Suspended Installation of Horizontal Unit; Cool; HORIZONTAL SUSPENSION KIT
Page 12 The ML193UH furnace can be installed in horizontal applications with either right- or left-hand air discharge. Refer to figure 17 for clearances in horizontal applications. Horizontal Application Installation Clearances Left End Right End Right-Hand Discharge Left-Hand Discharge Top Bottom ...
Page 13 - Filters; IMPORTANT; TABLE 1; Furnace; Duct System; Supply Air Plenum; Pipe & Fittings Specifications
Page 13 FIGURE 19 *GAS CONNECTION RAISED PLATFORM SERVICE PLATFORM INTAKE PIPE EXHAUST PIPE Return Air -- Horizontal Applications Return air may be brought in only through the end of a furnace installed in the horizontal position. The furnace isequipped with a removable bottom panel to facilitate i...
Page 14 - TABLE 2; Canadian Applications Only
Page 14 CAUTION Solvent cements for plastic pipe are flammable liquids and should be kept away from all sources ofignition. Do not use excessive amounts of solventcement when making joints. Good ventilation shouldbe maintained to reduce fire hazard and to minimizebreathing of solvent vapors. Avoid ...
Page 15 - Joint Cementing Procedure; - Clean and dry surfaces to be joined.
Page 15 TABLE 3 OUTDOOR TERMINATION USAGE* Input Size Vent Pipe Dia. in. STANDARD CONCENTRIC FlushMount Kit Wall Kit Wall Ring Kit Field Fabricated 1-1/2 inch 2 inch 3 inch 2 inch 3 inch 2 inch 51W11 (US) 51W12 (CA) 22G44 (US) 4 30G28 (CA) 44J40 (US) 4 81J20 (CA) 15F74 71M80 (US) 4 44W92 (CA) 69M29...
Page 16 - Venting Practices; Piping Suspension Guidelines; Wall Thickness Guidelines
Page 16 NOTE - Assembly should be completed within 20 sec onds after last application of cement. Hammer blowsshould not be used when inserting pipe. 8 - After assembly, wipe excess cement from pipe at end of fitting socket. A properly made joint will show a beadaround its entire perimeter. Any gaps...
Page 17 - Vent Piping Guidelines; Exhaust Pipe; TABLE 4; Piping Size Process
Page 17 Vent Piping Guidelines The ML193UH can be installed as either a Non-DirectVent or a Direct Vent gas central furnace. NOTE - In Non‐Direct Vent installations, combustion air is taken from indoors and flue gases are discharged outdoors. In Direct Vent installations, combustion air is takenfro...
Page 19 - Pipe size determined in table 5; EXHAUST
Page 19 FIGURE 24 TYPICAL EXHAUST PIPE CONNECTIONS IN UPFLOW DIRECT OR NON-DIRECT VENT APPLICATIONS TRANSITION 2” 2” 2” 3” 2” 2” or Pipe size determined in table 5 DO NOT transition from smaller to larger pipe in horizontal runs of exhaust pipe. EXHAUST *2” * When transitioning up in pipe size, use ...
Page 20 - INTAKE; TYPICAL AIR; INTAKE; PIPE CONNECTIONS IN HORIZONTAL DIRECT VENT APPLICATIONS
Page 20 FIGURE 26 TYPICAL AIR INTAKE PIPE CONNECTIONS IN UPFLOW DIRECT VENT APPLICATIONS *2” TRANSITION 2” 3” Pipe size determined in table 5 2” 2” 2” 2” or AIR INTAKE * When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible. NOTE − Intake and exhaust pipe must be the sa...
Page 21 - UPFLOW NON−DIRECT; TYPICAL AIR INTAKE PIPE CONNECTIONS; HORIZONTAL NON−DIRECT VENT APPLICATIONS
Page 21 Intake Piping The ML193UH furnace may be installed in either direct vent or non-direct vent applications. In non-direct vent applications, when intake air will be drawn into the furnacefrom the surrounding space, the indoor air quality must beconsidered and guidelines listed in Combustion, D...
Page 22 - General Guidelines for Vent Terminations
Page 22 CAUTION If this unit is being installed in an application withcombustion air coming in from a space serviced byan exhaust fan, power exhaust fan, or other devicewhich may create a negative pressure in the space,take care when sizing the inlet air opening. The inlet air opening must be sized...
Page 26 - TABLE 8; EXHAUST PIPE TERMINATION SIZE REDUCTION; Exiting Exhaust and Intake Vent
Page 26 Details of Intake and Exhaust Piping Terminations forDirect Vent Installations NOTE - In Direct Vent installations, combustion air is taken from outdoors and flue gases are discharged to outdoors. NOTE - Flue gas may be slightly acidic and may adversely affect some building materials. If any...
Page 27 - Front View
Page 27 7 - If intake and exhaust piping must be run up a side wall to position above snow accumulation or other obstructions, piping must be supported. At least onebracket must be used within 6” from the top of the elbow and then every 24” (610mm) as shown in figure42, to prevent any movement in ...
Page 28 - Vent Pipe; FIELD FABRICATED WALL TERMINATION
Page 28 FIGURE 42 * Use wall support every 24” (610 mm). Use two wall supports if extension is greater than 24” (610 mm) but less than 48” (1219 mm). NOTE − One wall support must be within 6” (152 mm)from top of each pipe (intake and exhaust) to preventmovement in any direction. NOTE − FIELD−PROVIDE...
Page 29 - - Exhaust piping must terminate straight out or up as; - If exhaust piping must be run up a side wall to position; ML193UH NON-DIRECT VENT APPLICATION
Page 29 ML193UH DIRECT VENT APPLICATION USING EXISTING CHIMNEY NOTE - Do not discharge exhaust gases directly into any chimney or vent stack. If vertical discharge through an existing unused chimney or stack is required, insert pipinginside chimney until the pipe open end is above top of chimney an...
Page 30 - CONDENSATE TRAP AND PLUG LOCATIONS; In horizontal applications it is recommended to; Field Provided Drain Components; Do
Page 30 NOTE - If necessary the condensate trap may be installed up to 5’ away from the furnace. Use PVC pipe to connecttrap to furnace condensate outlet. Piping from furnacemust slope down a minimum of 1/4” per ft. toward trap. 1 - Determine which side condensate piping will exit the unit, location...
Page 31 - (Unit shown in upflow position with remote trap); To Drain; Condensate Trap With Optional Overflow Switch
Page 31 FIGURE 48 (Unit shown in upflow position with remote trap) *5’ max. To Drain PVC Pipe Only Field Provided Vent Min. 1” Above Condensate Drain Connection 1” Min. 2” Max. CONDENSATE TRAP LOCATIONS *Piping from furnace must slope down a minimum of1/4” per ft. toward trap. FIGURE 49 ML193UH Wit...
Page 32 - ML193UH with Evaporator Coil Using a Separate Drain; IMPORTAN; ML193UH with Evaporator Coil Using a Common Drain; (Unit shown in horizontal left−hand discharge position)
Page 32 FIGURE 51 ML193UH with Evaporator Coil Using a Separate Drain (Unit shown in horizontal left-hand discharge position) . 5’ max. PVC Pipe Only 4”min 5”max Evaporator Coil Drain Pan Condensate Drain Connection Field Provided Vent(4” min. to 5” max. abovecondensate connection) *Piping from furn...
Page 34 - Gas Piping; LOW INLET PRESSURE SWITCH; Leak Check
Page 34 Gas Piping CAUTION If a flexible gas connector is required or allowed bythe authority that has jurisdiction, black iron pipeshall be installed at the gas valve and extend outsidethe furnace cabinet. The flexible connector can thenbe added between the black iron pipe and the gassupply line. W...
Page 36 - Removal of the Furnace from Common Vent
Page 36 TABLE 9 GAS PIPE CAPACITY - FT 3 /HR (kL/HR) Nominal Iron Pipe Size -Inches(mm) Internal Diameter -Inches(mm) Length of Pipe-Feet(m) 10 (3.048) 20 (6.096) 30 (9.144) 40 (12.192) 50 (15.240) 60 (18.288) 70 (21.336) 80 (24.384) 90 (27.432) 100 (30.480) 1/2 (12.7) .622 (17.799) 175 (4.96) 120 (...
Page 37 - Electrical; Precautions and Procedures; INTERIOR MAKE-UP BOX INSTALLATION; Unit nameplate states maximum current draw.; Accessory Terminals
Page 37 Electrical ELECTROSTATIC DISCHARGE (ESD) Precautions and Procedures CAUTION Electrostatic discharge can affect electronic components. Take precautionsto neutralize electrostatic charge bytouching your hand and tools to metalprior to handling the control. INTERIOR MAKE-UP BOX INSTALLATION FI...
Page 38 - Generator Use - Voltage Requirements; The furnace integrated control requires both polarity; TYPICAL ML193UH WIRING DIAGRAM
Page 38 Generator Use - Voltage Requirements The following requirements must be kept in mind whenspecifying a generator for use with this equipment: D The furnace requires 120 volts + 10% (Range: 108 volts to 132 volts) D The furnace operates at 60 Hz + 5% (Range: 57 Hz to 63 Hz) D The furnace integ...
Page 39 - Integrated Control; Integrated Control Diagnostic Codes; DIAGNOSTIC CODES; LED Status
Page 39 Integrated Control FIGURE 1 INTEGRATED CONTROL (Automatic Hot Surface Ignition System) BLOWER OFF DELAY JUMPER PUSH BUTTON LED TWIN TERMINAL DESIGNATIONS HUMLINEXFMREACCOOLHEATPARKCONTNEUTRALS Humidifier (120VAC)Input (120VAC)Transformer (120VAC)Indoor Air Qality Accessory Air Cleaner (120VA...
Page 41 - Gas Pressure Adjustment; Unit; All
Page 41 4 - Move gas valve switch to OFF. 5 - Replace the upper access panel. Failure To Operate If the unit fails to operate, check the following: 1 - Is the thermostat calling for heat? 2 - Are access panels securely in place? 3 - Is the main disconnect switch closed? 4 - Is there a blown fuse or ...
Page 42 - Proper Combustion; CO; High Altitude Information
Page 42 Proper Combustion Furnace should operate minimum 15 minutes with correctmanifold pressure and gas flow rate before checking combustion. Take combustion sample beyond the flue outletand compare to the tables below. TABLE 12 ML193 Unit CO 2 % For Nat CO 2 % For L.P. -045 7.2 - 7.9 8.6 - 9.3 -...
Page 43 - CARBON MONOXIDE POISONING HAZARD!
Page 43 Testing for Proper Venting and Sufficient Combustion Air for Non-Direct Vent Applications WARNING CARBON MONOXIDE POISONING HAZARD! Failure to follow the steps outlined below for eachappliance connected to the venting system beingplaced into operation could result in carbon monoxide poisoni...
Page 44 - Other Unit Adjustments
Page 44 Other Unit Adjustments Primary Limit . The primary limit is located on the heating compartmentvestibule panel. This limit is factory set and requires no adjustment. Flame Rollout Switches (Two) These manually reset switches are located on the front ofthe burner box. Pressure Switch The pres...
Page 45 - Field installation of twinning consists of connecting wires; FIELD WIRING FOR TWINNING
Page 45 Twinning the ML193UH The control board in this furnace is equipped with a provision to ”twin” (interconnect) two(2) adjacent furnaces with acommon plenum such that they operate as one (1) largeunit. When twinned, the circulating blower speeds are synchronized between the furnaces. If eithe...
Page 46 - Service
Page 46 Service WARNING ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD. Failure to follow safety warnings exactly could resultin dangerous operation, serious injury, death orproperty damage.Improper servicing could result in dangerous operation, serious injury, death, or property damage.Before servici...
Page 47 - Repair Parts List; All service must be performed by a licensed; Flame Sensor
Page 47 Repair Parts List The following repair parts are available through Lennox dealers. When ordering parts, include the complete furnace modelnumber listed on the CSA nameplate -- Example: ML193UH045XP36B-01. All service must be performed by a licensed professional installer (or equivalent), ser...
Page 48 - Line Voltage; UNIT SET UP; Flter
Page 48 Start-Up & Performance Check List Gas Supply Pressure SUPPLY AIR Line Voltage GAS SUPPLY Natural Gas LP Propane Gas Piping Connections Tight Leak Tested Supply Line Pressure “W.C.________ 1 INTAKE / EXHAUST PIPE All Joints Primed and Glued Terminations Installed Properly Pipes Sup porte...
Page 49 - Combustion CO; UNIT OPERATION
Page 49 Contractor's: Name_________________________Telephone_____________Checklist Completed____________________ Job Address_____-________________________________Technician's Name___________________________________ 1 HEATING MODE GAS MANIFOLD PRESSURE “W.C._____ COMBUSTION SAMPLE CO 2 % ______ CO PP...
Page 50 - Requirements for Commonwealth of Massachusetts
Page 50 Requirements for Commonwealth of Massachusetts Modifications to NFPA-54, Chapter 10 Revise NFPA-54 section 10.8.3 to add the following requirements: For all side wall, horizontally vented, gas-fueled equipment installed in every dwelling, building or structure used in whole or in part for r...
Lennox MPD-4540CNM-B
Manual
Lennox O23V4-105
Manual
Lennox G60UH(X)
Manual
Lennox SWI160
Manual
Lennox EST-50*
Manual
Lennox II-T C INS
Manual
Lennox LSBV-3628EN-H
Manual
Lennox ADAGIO-MN
Manual
Lennox Elite Series Gas Furnace Upflow/Horizontal Air Discharge
Manual
Lennox G61MP
Manual
Lennox CONDENSING UNITS
Manual
Lennox G32Q3-75
Manual
Lennox TK3-33PB
Manual
Lennox SLBV-35
Manual
Lennox MONTEST
Manual
Lennox BC-36/42-2
Manual
Lennox JX20
Manual