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Lennox ML193UH

Lennox ML193UH
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G A S F U R N A C E S
ML193UH
MERIT
®
SERIES
Upow / Horizontal
Bulletin No. 210588
October 2010
Supersedes September 2010
E N G I N E E R I N G D A T A
AFUE - 93%
Input - 44,000 to 132,000 Btuh
Nominal Add-on Cooling - 2 to 5 Tons
ML 1 93 UH 070 P 36 B
Unit Type
ML = Merit
®
Series
Stages
1 = One-Stage
Nominal Gas Heat Input
045 = 44,000 Btuh
070 = 66,000 Btuh
090 = 88,000 Btuh
110 = 110,000 Btuh
135 = 132,000 Btuh
Blower
P = PSC Multi-Speed Blower Motor
Nominal Add-On Cooling Capacity
24 = 2 tons
36 = 3 tons
48 = 4 tons
60 = 5 tons
Conguration
UH = Upow/Horizontal
MODEL NUMBER IDENTIFICATION
1
Indoor coils with the same letter designation will physically match the furnace.
1
Cabinet Width
B = 17-1/2 in.
C = 21 in.
D = 24-1/2 in.
AFUE
93 = 93%

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Lennox ML193UH Specifications

General IconGeneral
Efficiency93% AFUE
Heating StagesSingle-stage
Blower MotorPSC
Energy Star CertifiedNo
Gas ValveSingle-stage
Ignition SystemHot Surface Ignition
Blower Motor TypePSC
Ignition TypeHot Surface Ignition
Fuel TypeNatural Gas or Propane
Warranty5-Year Limited Warranty on covered components
Stages of HeatSingle-stage
Heating Capacity44, 000-132, 000 BTU/h

Summary

MODEL NUMBER IDENTIFICATION

WARRANTY

Duralok Plus Heat Exchanger Warranty

Details limited warranty coverage for heat exchanger and other components over specified periods in residential and non-residential applications.

HEATING SYSTEM

Lennox Duralok Plus Heat Exchanger Assembly

Describes the primary and secondary heat exchanger design, materials, and benefits for efficiency and airflow.

Secondary Heat Exchanger Condenser Coil

Details the construction of the secondary heat exchanger, including aluminum fins and stainless steel tubes, and its leak testing.

HEATING SYSTEM COMPONENTS

Inshot Burners

Highlights the aluminized steel inshot burners for efficient operation, proper air-gas mixing, and ease of service.

Hot Surface Nitride Ignitor

Details the unique, high-strength ceramic ignitor for long life, fast heat-up, and reliable ignition with low power usage.

Gas Control Valve

Describes the 24-volt redundant combination gas control valve, integrating manual shut-off, automatic electric valve, and gas pressure regulation.

Combustion Air Inducer

Explains the role of the shaded pole blower in prepurging the heat exchanger and venting flue products during the heating cycle.

Termination Kit - Concentric - Direct Vent Applications

Termination Kit - Flush-Mount

Close Couple (US Only) - Direct Vent Applications

Close Couple WTK (Canada Only) - Direct Vent Applications

CONTROLS

Integrated Furnace Control Board

Central control board managing furnace operations, including inducer control, pre/post-purge cycles, ignition, and flame sensing.

BLOWER

Multi-speed Direct Drive Blower

Describes the blower's static and dynamic balance, resilient mounting, ease of service, and speed adjustment via the control board.

CABINET FEATURES

Cabinet Construction and Design

Details the low-profile, narrow width, heavy-gauge steel construction, pre-painted finish, and foil-faced insulation for efficient installation and operation.

SPECIFICATIONS - GAS HEATING PERFORMANCE

Model Number Breakdown

Details the ML193UH model numbering system, including unit type, stages, AFUE, configuration, input, blower, and cabinet width.

Gas Heating Performance Data

Presents AFUE, Input/Output Btuh, Temperature Rise Range, and Gas Manifold Pressure for various models.

INSTALLATION CLEARANCES

Clearances for Upflow and Horizontal Positions

Specifies minimum required clearances in inches (mm) for sides, rear, top/plenum, front, and floor installations.

OPTIONAL ACCESSORIES

TERMINATION KITS USAGE GUIDE

VENT LENGTH SPECIFICATIONS

Standard Termination Vent Lengths

Tables detailing maximum allowable vent lengths in feet for standard terminations at elevations up to 10,000 ft. based on input size and pipe diameter.

Concentric Termination Vent Lengths

Tables specifying maximum vent lengths in feet for concentric terminations at elevations up to 10,000 ft. by input size and pipe diameter.

DIMENSIONS - UPFLOW POSITION

Upflow Unit Dimensions

Provides key dimensions (A, B, C, D) in inches and millimeters for various ML193UH models in the upflow configuration, with diagrams.

DIMENSIONS - HORIZONTAL POSITION

Horizontal Unit Dimensions

Presents dimensions (A, B, C, D) in inches and millimeters for various ML193UH models in both left-hand and right-hand horizontal discharge configurations.

OPTIONAL ACCESSORY DIMENSIONS

FURNACECOIL COMBINED DIMENSIONS

Upflow Position Combined Dimensions

Lists combined dimensions (A, B) in inches and millimeters for various ML193UH furnaces when paired with specific CX34 and C33 coils in upflow configurations.

Horizontal Position Combined Dimensions

Provides combined dimensions (A, B) in inches and millimeters for specific ML193UH furnaces with CH33 coils in horizontal configurations.

ACCESSORY DIMENSIONS - FLUSH-MOUNT TERMINATION

ACCESSORY DIMENSIONS - CONCENTRIC TERMINATIONS

ACCESSORY DIMENSIONS - CLOSE-COUPLE WALL KITS

BLOWER PERFORMANCE DATA

Blower Performance Tables

Presents detailed blower performance data (Air Volume vs. Watts) for various external static pressures across different speed settings for multiple furnace models.

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