Lennox ML193UH030XE36B Installation Instructions Manual
  1. Manuals
  2. Brands
  3. Lennox Manuals
  4. Furnace
  5. ML193UH030XE36B
  6. Installation instructions manual

Lennox ML193UH030XE36B Installation Instructions Manual

Hide thumbs Also See for ML193UH030XE36B:
Table of Contents

Advertisement

Quick Links

© 2021 Lennox Industries Inc.
Dallas, Texas USA
Contents
Unit Dimensions - inches (mm) ......................................2
ML193UHEGas Furnace ................................................3
Shipping and Packing List ..............................................3
Safety .............................................................................3
General ...........................................................................5
Combustion, Dilution, Ventilation Air...............................5
Setting Equipment ..........................................................8
Filters ............................................................................13
Duct System .................................................................13
Pipe Fittings Specifications...........................................14
Joint Cementing Procedure ..........................................15
Venting Practices ..........................................................16
INSTALLATION
INSTRUCTIONS
ML193UHE
MERIT
SERIES GAS FURNACE
®
UPFLOW / HORIZONTAL AIR DISCHARGE
507863-02
10/2021
Supersedes 06/2020
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 man-
uals, be alert to the potential for personal injury or death.
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer (or
equivalent), service agency, or the gas supplier.
Gas Piping ....................................................................33
Electrical .......................................................................36
Integrated Control .........................................................39
Unit Start-Up .................................................................40
Gas Pressure Measurement.........................................41
Proper Combustion.......................................................42
High Altitude .................................................................42
Other Unit Adjustments.................................................44
Service..........................................................................45
Repair Parts List ...........................................................46
Start Up Checklist .........................................................47
Blower Data ..................................................................51
Page 1
CAUTION
WARNING

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the ML193UH030XE36B and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Lennox ML193UH030XE36B

Summary of Contents for Lennox ML193UH030XE36B

  • Page 1: Table Of Contents

    INSTALLATION INSTRUCTIONS ML193UHE © 2021 Lennox Industries Inc. Dallas, Texas USA MERIT SERIES GAS FURNACE ® UPFLOW / HORIZONTAL AIR DISCHARGE 507863-02 10/2021 Supersedes 06/2020 THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE This is a safety alert symbol and should never be ignored.

  • Page 2: Unit Dimensions - Inches (Mm)

    Unit Dimensions - inches (mm) NOTE - 60C size units that require air volumes over 1800 cfm must have one of the following: 1. Single side return air and Optional Return Air Base EXHAUST AIR 3-3/8 OUTLET with transition that must accommodate required (86) 20 x 25 x 1 inch (508 x 635 x 25 mm) air filter to maintain proper velocity.

  • Page 3: Ml193Uhegas Furnace

    ML193UHE Gas Furnace Shipping and Packing List The ML193UHE Category IV gas furnace is shipped ready Package 1 of 1 contains for installation in the upflow or horizontal position. The fur- 1 - Assembled ML193UHE unit nace is shipped with the bottom panel in place. The bot- tom panel must be removed if the unit is to be installed 1 - Bag assembly containing the following: in horizontal or upflow applications with bottom return air.

  • Page 4: Use Of Furnace As A Construction Heater

    The National Fuel Gas Code is available from the follow- In Canada, all electrical wiring and grounding for the unit ing address: must be installed according to the current regulations of the Canadian Electrical Code Part I (CSA Standard C22.1) American National Standards Institute, Inc.

  • Page 5: General

    Water softening chemicals FAILURE TO FOLLOW THE ABOVE INSTALLATION IN- STRUCTIONS VOIDS THE MANUFACTURER’S EQUIP- De-icing salts or chemicals MENT LIMITED WARRANTY. LENNOX DISCLAIMS Carbon tetrachloride ALL LIABILITY IN CONNECTION WITH INSTALLER’S Halogen type refrigerants FAILURE TO FOLLOW THE ABOVE INSTALLATION IN- Cleaning solvents (such as perchloroethylene) STRUCTIONS.
  • Page 6 This reprinted material is not the complete and official po- When the furnace is installed so that supply ducts carry sition of the ANSI on the referenced subject, which is rep- air circulated by the furnace to areas outside the space resented only by the standard in its entirety.
  • Page 7 Air from Outside EQUIPMENT IN CONFINED SPACE (Inlet Air from Ventilated Crawlspace and Outlet Air to Outside) If air from outside is brought in for combustion and ventila- tion, the confined space shall be provided with two perma- nent openings. One opening shall be within 12” (305mm) Roof Terminated of the top of the enclosure and one within 12”...
  • Page 8 flexible mounting leg). See FIGURE 10. The bolt and EQUIPMENT IN CONFINED SPACE - ALL AIR FROM OUTSIDE washer must be removed before the furnace is placed (All Air Through Ventilated Attic) into operation. After the bolt and washer have been re- moved, the rigid leg will not touch the blower housing.

  • Page 9: Setting Equipment

    SETTING EQUIPMENT UPFLOW APPLICATION Place level on blower Place level on the front blower deck screws to check deck to check side to side forward tilt UNIT FRONT AIR FLOW 1/2” max. SIDE VIEW HORIZONTAL APPLICATION UNIT FRONT AIR FLOW 1/2”...
  • Page 10 Return Air Guidelines WARNING Return air can be brought in through the bottom or either Improper installation of the furnace can result in personal side of the furnace installed in an upflow application. If the injury or death. Combustion and flue products must furnace is installed on a platform with bottom return, make never be allowed to enter the return air system or air an airtight seal between the bottom of the furnace and the...
  • Page 11 Optional Return Air Base CONDENSATE (Upflow Applications Only) TRAP FURNACE FRONT 23 (584) 3−1/4 IF BASE Overall (83) IS USED (Maximum) Minimum WITHOUT 11 (279) IAQ CABINET, Maximum 22−7/16 INDOOR AIR A SINGLE Unit side return air 14 (356) (570) QUALITY RETURN AIR Opening...
  • Page 12 5 - If necessary, run the condensate line into a condensate on a platform, as shown in FIGURE 19. A horizontal sus- pump to meet drain line slope requirements. The pension kit (51W10) may be ordered from Lennox or use pump must be rated for use with condensing equivalent furnaces.

  • Page 13: Filters

    If a gas appliance is operating in the data given in the appropriate Lennox Product a room with negative pressure, the flue products can be Specifications bulletin. Additional information is provided pulled back down the vent pipe and into the room.

  • Page 14: Pipe Fittings Specifications

    CAUTION Pipe & Fittings Specifications All pipe, fittings, primer and solvent cement must conform Solvent cements for plastic pipe are flammable liquids with American National Standard Institute and the Ameri- and should be kept away from all sources of ignition. can Society for Testing and Materials (ANSI/ASTM) stan- dards.

  • Page 15: Joint Cementing Procedure

    TABLE 3 OUTDOOR TERMINATION USAGE* STANDARD CONCENTRIC Wall Kit 1-1.2 inch 2 inch 3 inch Flush Mount Kit 2 inch 3 inch Vent Pipe 71M80 69M29 Input Size Field 60L46 (US) 51W11 22G44 Dia. in. (US) (US) 44J40 (US) Fabricated 44W93 (US) (US)

  • Page 16: Venting Practices

    Vent Piping Guidelines walls, hole must be large enough to allow clearance on all sides of pipe through center of hole using a NOTE - Lennox has approved the use of DuraVent® and hanger. Centrotherm manufactured vent pipe and terminations as an option to PVC.
  • Page 17 FIGURE 23 TABLE 4 NOTE - Lennox offers a glueless vent adapter kit 17H92 as an option for exhaust exiting at the furnace top cap MINIMUM VENT PIPE LENGTHS coupling. If the kit is not used then the exhaust pipe MUST ML193UHE Model MIN.
  • Page 18 TABLE 5 Maximum Allowable Intake or Exhaust Vent Length in Feet NOTE - Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size NOTE - Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length calculation.
  • Page 19 TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONS IN UPFLOW DIRECT OR NON-DIRECT VENT APPLICATIONS 2” EXHAUST 2” EXHAUST INTAKE INTAKE 2” 2” 2” 2” 3” 3” 030/045/070 Only 1−1/2” TRANSITION Exhaust 2” 6” Min Exhaust DO NOT transition from larger to smaller DO NOT transition pipe in horizontal runs from smaller to larger...
  • Page 20 Intake Piping TYPICAL AIR INTAKE PIPE CONNECTIONS HORIZONTAL NON−DIRECT VENT APPLICATIONS The ML193UHE furnace may be installed in either direct (Horizontal Right−Hand Air Discharge Application Shown) vent or non-direct vent applications. In non-direct vent ap- plications, when intake air will be drawn into the furnace from the surrounding space, the indoor air quality must be considered and guidelines listed in Combustion, Dilution and Ventilation Air section must be followed.
  • Page 21 General Guidelines for Vent Terminations CAUTION In Non-Direct Vent applications, combustion air is taken If this unit is being installed in an application with from indoors and the flue gases are discharged to the out- combustion air coming in from a space serviced by an doors.
  • Page 22 TABLE 7 Maximum Allowable Exhaust Vent Pipe Length (in ft.) Without Insulation In Unconditioned Space For Winter Design Temperatures Single - Stage High Efficiency Furnace Winter Design Unit Input Size Vent Pipe Temperatures1 °F Diameter (°C) 1-1/2” 32 to 21 2 in (0 to -6) 2-1/2 in...
  • Page 23 ‡ Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor. Lennox recommends avoiding this location if possible. FIGURE 32...
  • Page 24 ‡ Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor. Lennox recommends avoiding this location if possible. FIGURE 33 Page 24...
  • Page 25 Details of Intake and Exhaust Piping Terminations for TABLE 8 Direct Vent Installations Exhaust Pipe Termination Size Reduction NOTE - In Direct Vent installations, combustion air is taken ML193UHE Model Termination Pipe Size from outdoors and flue gases are discharged to outdoors. *030, *045, *070 1-1/2”...
  • Page 26 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 one bracket must be used within 6” from the top of EXHAUST 12”...
  • Page 27 FIELD FABRICATED WALL TERMINATION NOTE − FIELD−PROVIDED REDUCER MAY BE 2” (51mm) 3” (76mm) REQUIRED TO ADAPT LARGER VENT PIPE SIZE Vent Pipe Vent Pipe TO TERMINATION A− Minimum clearance above grade or average 12” (305 mm) 12” (305 mm) snow accumulation B−...
  • Page 28 Lennox provides kit 51W18 (USA) kit 15Z70 (Canada) to 2 - On field supplied terminations for side wall exit, install 2” or 3” PVC exhaust piping through the floor joists exhaust piping may extend a maximum of 12 inches and into the crawl space.
  • Page 29 NOTE - In upflow applications where side return trap and line. Heating cable kit is available from Lennox in various lengths; 6 ft. (1.8m) - kit no. 26K68 and 24 ft.
  • Page 30 CONDENSATE TRAP LOCATIONS Condensate Trap With Optional Overflow Switch (Unit shown in upflow position with remote trap) From Evaporator Coil HorizontalFurnace4” Min. to 5” Max.above FieldProvidedVent condensatedrain connection) Min. 1” Above Condensate Drain Connection 1” Min. 2” Max. FurnaceCondensate DrainConnection *5’...
  • Page 31 Furnace with Evaporator Coil Using a Separate Drain (Unit shown in horizontal left-hand discharge position) Field Provided Vent Evaporator (4” min. to 5” max. above Coil condensate connection) 4”min 5”max 5’ max. PVC Pipe Only Condensate Drain Connection (Trap at coil is optional) Drain Pan Piping from furnace and evaporator coil must slope down a minimum 1/4”...
  • Page 32 TRAP / DRAIN ASSEMBLY USING 1/2” PVC OR 3/4” PVC Optional Condensate Drain Connection Adapter 3/4 inch slip X 3/4 inch mpt (not furnished) 90° Street Elbow 3/4 inch PVC (not furnished) Adapter 3/4 inch slip X 3/4 inch mpt (not furnished) Condensate Drain Connection In Unit 1 (25 mm) Min.

  • Page 33: Gas Piping

    3 - Gas piping must not run in or through air ducts, Gas Piping clothes chutes, chimneys or gas vents, dumb waiters or elevator shafts. Center gas line through piping CAUTION hole. Gas line should not touch side of unit. See FIGURE 56 and FIGURE 57.
  • Page 34 WARNING FIRE OR EXPLOSION HAZARD Failure to follow the safety warnings exactly could result in serious injury, death, or property damage. Never use an open flame to test for gas leaks. Check all connections using a commercially available soap solution made specifically for leak detection.
  • Page 35 TABLE 9 Gas Pipe Capacity - ft3/hr (m3/hr) Nominal Internal Length of Pipe - feet (m) Iron Pipe Diameter Size Inches inches (3.048) (6.096) (9,144) (12,192) (15.240) (18.288) (21.336) (24.384) (27.432) (30,480) (mm) (mm) .622 (12.7) (17.799) (4.87) (3.34) (2.69) (2.29) (2.03) (1.84)

  • Page 36: Electrical

    The unit is equipped with a field make-up box. The make- Electrical up box may be moved to the right side of the furnace to fa- cilitate installation. Secure the excess wire to the existing ELECTROSTATIC DISCHARGE (ESD) harness to protect it from damage. Precautions and Procedures CAUTION Refer to FIGURE 59 for schematic wiring diagram and...
  • Page 37 Accessory Terminals Indoor Blower Speeds One line voltage “EAC” 1/4” spade terminal is provided 1 - When the thermostat is set to “FAN ON,” the indoor on the furnace integrated control. See FIGURE 60 for in- blower will run continuously on the (FAN) speed when tegrated control configuration.
  • Page 38 FIGURE 59 Page 38...

  • Page 39: Integrated Control

    TABLE 10 Integrated Control 1/4” QUICK CONNECT TERMINALS INTEGRATED CONTROL 120HUM Humidifier 120VAC (Automatic Hot Surface Ignition System) LINE 120VAC XFMR Transformer 120VAC CIRC Indoor blower 120VAC Indoor air quality accessory 120VAC NEUTRAL Common 120VAC HUM24 Humidifier 24VAC 3/16” QUICK CONNECT TERMINALS COOL Cooling tap 24VAC HEAT...

  • Page 40: Unit Start-Up

    6 - Adjust the thermostat to deactivate the heating Unit Start-Up demand and wait for the combustion air inducer to FOR YOUR SAFETY READ BEFORE OPERATING stop. At this point, the trap should be primed with sufficient water to ensure proper condensate drain WARNING operation.

  • Page 41: Gas Pressure Measurement

    4 - Move gas valve switch to OFF. Furnace should operate at least 5 minutes before check- ing gas flow. Determine time in seconds for two revolu- 5 - Replace the upper access panel. tions of gas through the meter. (Two revolutions assures Failure To Operate a more accurate time.) Divide by two and compare to time in TABLE 11.

  • Page 42: Proper Combustion

    Proper Combustion High Altitude Information Furnace should operate minimum 15 minutes with correct NOTE - In Canada, certification for installations at eleva- manifold pressure and gas flow rate before checking com- tions over 4500 feet (1372 m) is the jurisdiction of local bustion.

  • Page 43: Testing For Combustion Air Non-Direct Vents

    Testing for Proper Venting and Sufficient Combustion Air for Non-Direct Vent Applications 3 - To the extent that it is practical, close all building WARNING doors and windows and all doors between the space in which the appliances connected to the venting .

  • Page 44: Other Unit Adjustments

    Other Unit Adjustments HEAT FAN OFF TIME IN SECONDS Primary Limit. The primary limit is located on the heating compartment vestibule panel. This limit is factory set and requires no adjustment. NO JUMPER Flame Rollout Switches (Two) To adjust fan-off timing, reposition jumper across pins to These manually reset switches are located on the front of achieve desired setting.

  • Page 45: Service

    At the beginning of each heating season, and to comply 13- Perform a complete combustion analysis during the with the Lennox Limited Warranty, your system should furnace inspection to ensure proper combustion be checked as follows: and operation.

  • Page 46: Repair Parts List

    Winterizing and Condensate Trap Care Repair Parts List 1 - Turn off power to the furnace. The following repair parts are available through Lennox 2 - Have a shallow pan ready to empty condensate dealers. When ordering parts, include the complete fur- water.

  • Page 47: Start Up Checklist

    Start-Up & Performance Check List UNIT SET UP (typical) Furnace: Model Number_______________ Serial Number_________________ SUPPLY Line Voltage GAS SUPPLY LP Propane Gas Natural Gas Piping Connections Tight Leak Tested Flter Supply Line Pressure “W.C.________ RETURN AIR Gas Supply Pressure DUCT SYSTEM SUPPLY AIR DUCT Sealed INTAKE / EXHAUST PIPE...
  • Page 48 UNIT OPERATION HEATING MODE COOLING MODE GAS MANIFOLD PRESSURE “W.C._____ INDOOR BLOWER AMPS______ COMBUSTION SAMPLE CO CO PPM_______ TEMPERATURE DROP ______ Return Duct Temperature _________ INDOOR BLOWER AMPS______ Supply Duct Temperature _______ Temperature Drop = _________ TEMPERATURE RISE TOTAL EXTERNAL STATIC (dry coil) Supply Duct Temperature ________ Supply External Static _______ Return Duct Temperature...
  • Page 49 4 - INSPECTION. The state or local gas inspector of the Requirements for Commonwealth of Massachusetts side wall, horizontally vented, gas-fueled equipment Modifications to NFPA-54, Chapter 10 shall not approve the installation unless, upon Revise NFPA-54 section 10.8.3 to add the following inspection, the inspector observes carbon monoxide requirements: detectors and signage installed in accordance with the...
  • Page 50 FOR THE PROVINCE OF ONTARIO, HORIZONTAL ADDENDUM FOR ALL PROVINCES OF CANADA SIDEWALL VENT APPLICATIONS ONLY See below for venting in all provinces of Canada. Lennox For exterior horizontal venting applications, the 2” X 1.5” approves the following termination for use in all provinces reducer for 2”...

  • Page 51: Blower Data

    Blower Data ML193UH030XE36B PERFORMANCE (Less Filter) Air Volume / Watts at Various Blower Speeds External High Medium-High Medium Medium-Low Static (Black) (Brown) (Blue) (Yellow) (Red) Pressure in. w.g. Watts Watts Watts Watts Watts 0.00 1435 1170 1000 0.10 1400 1130 0.20...
  • Page 52 Blower Data ML193UH070XE36B PERFORMANCE (Less Filter) Air Volume / Watts at Various Blower Speeds External High Medium-High Medium Medium-Low Static (Black) (Brown) (Blue) (Yellow) (Red) Pressure in. w.g. Watts Watts Watts Watts Watts 0.00 1430 1300 1170 0.10 1395 1270 1145 0.20 1365...
  • Page 53 Blower Data ML193UH090XE48C PERFORMANCE (Less Filter) Air Volume / Watts at Various Blower Speeds External High Medium-High Medium Medium-Low Static (Black) (Brown) (Blue) (Yellow) (Red) Pressure in. w.g. Watts Watts Watts Watts Watts 0.00 1710 1500 1395 1315 1205 0.10 1675 1475 1365...
  • Page 54 Blower Data ML193UH110XE60C PERFORMANCE (Less Filter) Air Volume / Watts at Different Blower Speeds Bottom Return Air, Side Return Air with Return Air from Single Side Return Air − Air volumes in bold require Both Sides or Return Air from Bottom and One Side. Optional Return Air Base and field fabricated transition External to accommodate 20 x 25 x 1 in.

This manual is also suitable for:

Ml193uheMerit seriesMl193uh045xe36bMl193uh070xe36bMl193uh090xe36cMl193uh090xe48c ... Show all

Table of Contents