Lennox ML193UH - Manual

Lennox ML193UH

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Table of Contents:

  • Page 2 – Optional External Side Return Air Filter Kit is not for use
  • Page 3 – FIGURE 1; FIGURE 2; Shipping and Packing List; Package 1 of 1 contains; Safety Information; WARNING; DANGER; Building Codes
  • Page 4 – Heating Unit Installed Upstream of Cooling Coil; Gas Unit; NOTE; Use of Furnace as Construction Heater
  • Page 5 – General; CAUTION; Product contains fiberglass wool.
  • Page 6 – In Canada, refer to the CSA B149 installation codes.; Unconfined Space; must be; Air from Inside
  • Page 7 – FIGURE 6; FIGURE 7; * See table 6 for maximum vent lengths
  • 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 9 – SETTING EQUIPMENT; UPFLOW APPLICA­
  • Page 10 – Installation Clearances; Return Air Guidelines; Refer to Engineering Handbook for additional information.; Side Return Air; Return
  • Page 11 – SIDE RETURN; Screw; Removing the Bottom Panel; Horizontal Applications; Front
  • Page 12 – Left End; Suspended Installation of Horizontal Unit; Cool­; HORIZONTAL SUSPENSION KIT
  • Page 13 – Filters; IMPORTANT; TABLE 1; Furnace; Duct System; Supply Air Plenum; Pipe & Fittings Specifications
  • Page 14 – TABLE 2; Canadian Applications Only
  • Page 15 – Joint Cementing Procedure; - Clean and dry surfaces to be joined.
  • Page 16 – Venting Practices; Piping Suspension Guidelines; Wall Thickness Guidelines
  • Page 17 – Vent Piping Guidelines; Exhaust Pipe; TABLE 4; Piping Size Process
  • Page 19 – Pipe size determined in table 5; EXHAUST
  • Page 20 – INTAKE; TYPICAL AIR; INTAKE; PIPE CONNECTIONS IN HORIZONTAL DIRECT VENT APPLICATIONS
  • Page 21 – UPFLOW NON−DIRECT; TYPICAL AIR INTAKE PIPE CONNECTIONS; HORIZONTAL NON−DIRECT VENT APPLICATIONS
  • Page 22 – General Guidelines for Vent Terminations
  • Page 26 – TABLE 8; EXHAUST PIPE TERMINATION SIZE REDUCTION; Exiting Exhaust and Intake Vent
  • Page 27 – Front View
  • Page 28 – Vent Pipe; FIELD FABRICATED WALL TERMINATION
  • 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 30 – CONDENSATE TRAP AND PLUG LOCATIONS; In horizontal applications it is recommended to; Field Provided Drain Components; Do
  • Page 31 – (Unit shown in upflow position with remote trap); To Drain; Condensate Trap With Optional Overflow Switch
  • 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 34 – Gas Piping; LOW INLET PRESSURE SWITCH; Leak Check
  • Page 36 – Removal of the Furnace from Common Vent
  • Page 37 – Electrical; Precautions and Procedures; INTERIOR MAKE-UP BOX INSTALLATION; Unit nameplate states maximum current draw.; Accessory Terminals
  • Page 38 – Generator Use - Voltage Requirements; The furnace integrated control requires both polarity; TYPICAL ML193UH WIRING DIAGRAM
  • Page 39 – Integrated Control; Integrated Control Diagnostic Codes; DIAGNOSTIC CODES; LED Status
  • Page 41 – Gas Pressure Adjustment; Unit; All
  • Page 42 – Proper Combustion; CO; High Altitude Information
  • Page 43 – CARBON MONOXIDE POISONING HAZARD!
  • Page 44 – Other Unit Adjustments
  • Page 45 – Field installation of twinning consists of connecting wires; FIELD WIRING FOR TWINNING
  • Page 46 – Service
  • Page 47 – Repair Parts List; All service must be performed by a licensed; Flame Sensor
  • Page 48 – Line Voltage; UNIT SET UP; Flter
  • Page 49 – Combustion CO; UNIT OPERATION
  • Page 50 – Requirements for Commonwealth of Massachusetts
Loading the manual

Page 1

08/13

*2P0813*

507121-01

*P507121-01*

E

2013 Lennox Industries Inc.

Dallas, Texas, USA

AIR FLOW

UPFLOW

AIR FLOW

AIR FLOW

HORIZONTAL RIGHT

HORIZONTAL LEFT

INSTALLATION
INSTRUCTIONS
ML193UH

MERIT

®

SERIES GAS FURNACE

UPFLOW / HORIZONTAL AIR DISCHARGE

507121-01
08/2013
Supersedes 06/2013

THIS MANUAL MUST BE LEFT WITH THE

HOMEOWNER FOR FUTURE REFERENCE

This is a safety alert symbol and should never be ignored.
When you see this symbol on labels or in manuals, be alert
to the potential for personal injury or death.

CAUTION

As with any mechanical equipment, personal injury
can result from contact with sharp sheet metal
edges. Be careful when you handle this equipment.

WARNING

Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person­
al injury or loss of life. Installation and service must
be performed by a licensed professional HVAC in­
staller (or equivalent), service agency or the gas sup­
plier.

Table of Contents

Unit Dimensions

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ML193UH Gas Furnace

3

. . . . . . . . . . . . . . . . . . . . . . . . . .

Shipping and Packing List

3

. . . . . . . . . . . . . . . . . . . . . . . .

Safety Information

3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Use of Furnace as a Construction Heater

4

. . . . . . . . . . .

General

5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Combustion, Dilution, Ventilation Air

5

. . . . . . . . . . . . . . .

Setting Equipment

8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Filters

13

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Duct System

13

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pipe and Fittings Specifications

13

. . . . . . . . . . . . . . . . . . .

Joint Cementing Procedure

15

. . . . . . . . . . . . . . . . . . . . . . .

Venting Practices

16

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Vent Piping Guidelines

17

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Gas Piping

34

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical

37

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Integrated Control

39

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Unit Start Up

40

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gas Pressure Measurement

41

. . . . . . . . . . . . . . . . . . . . . .

Proper Combustion

42

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

High Altitude

42

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Testing For Combustion Air Non-Direct Vents

44

. . . . . . .

Other Unit Adjustments

45

. . . . . . . . . . . . . . . . . . . . . . . . . .

Twinning the ML193UH

45

. . . . . . . . . . . . . . . . . . . . . . . . . .

Service

46

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Repair Parts List

47

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Start Up Checklist

48

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Summary

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...

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