Lennox ML193DF - Manual
Lennox ML193DF – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 2 – FRONT VIEW
- Page 3 – ML193DF Parts Arrangement; FIGURE 1
- Page 4 – Shipping and Packing List; Package 1 of 1 contains; DANGER; Safety Information; WARNING; Building Codes
- Page 5 – Heating Unit Installed Parallell to Air Handler Unit; NOTE; Use of Furnace as Construction Heater
- Page 6 – General; Product contains fiberglass wool.; In Canada, refer to the CSA B149 installation codes.; CAUTION
- Page 7 – Air from Outside
- Page 8 – FIGURE 5; equipment in the enclosure. See; FIGURE 7; Shipping Bolt Removal
- Page 9 – Installation − Setting Equipment; The unit must be level from side to side. Unit may
- Page 10 – Do not drag the unit across the floor in the; Downflow Application Installation Clearances; Installation on Non−Combustible Flooring Figure 12; Installation on Combustible Flooring Figure 13
- Page 12 – Filters; TABLE 3; Furnace; Duct System; Pipe & Fittings Specifications; TABLE 4
- Page 13 – IMPORTANT; Canadian Applications Only
- Page 14 – Joint Cementing Procedure; Venting Practices; Piping Suspension Guidelines; Wall Thickness Guidelines
- Page 15 – Vent Piping Guidelines
- Page 17 – Pipe size determined in table 7.; TOP VIEW; TOP VIEW
- Page 18 – TYPICAL AIR INTAKE PIPE CONNECTIONS; NON
- Page 21 – EXHAUST PIPE TERMINATION SIZE REDUCTION
- Page 25 – WALL TERMINATION KITS (CLOSE
- Page 26 – − Exhaust piping must terminate straight out or up as; − If exhaust piping must be run up a side wall to position
- Page 27 – ML193DF NON−DIRECT VENT APPLICATION; Condensate Piping; CONDENSATE TRAP AND PLUG LOCATIONS
- Page 28 – − If unit will be started immediately upon completion of; CONDENSATE TRAP LOCATION; to drain; ML193DF with Evaporator Coil; Do
- Page 30 – Gas Piping; Leak Check; FIRE OR EXPLOSION HAZARD
- Page 31 – GAS PIPE CAPACITY − FT
- Page 32 – Electrical; Precautions and Procedures; outside
- Page 34 – Indoor Blower Speeds
- Page 35 – TYPICAL ML193DF WIRING DIAGRAM
- Page 36 – INTEGRATED CONTROL; TERMINAL DESIGNATIONS; Unit Start−Up; FOR YOUR SAFETY READ BEFORE OPERATING; BEFORE LIGHTING
- Page 38 – Gas Pressure Adjustment; Fuel; Manifold; All sizes; Proper Combustion; High Altitude Information
- Page 39 – CARBON MONOXIDE POISONING HAZARD!
- Page 40 – Other Unit Adjustments
- Page 41 – BLOWER DATA
- Page 42 – Service
- Page 44 – DIAGNOSTIC CODES
- Page 45 – Troubleshooting: Heating Sequence of Operation; HEATING SEQUENCE OF OPERATION; NORMAL HEATING MODE; (Flame sensed without gas valve energized)
- Page 46 – HEATING SEQUENCE CONTINUED
- Page 47 – Troubleshooting: Cooling Sequence of Operation; COOLING SEQUENCE OF OPERATION; NORMAL COOLING MODE
- Page 48 – Troubleshooting: Continuous Fan Sequence of Operation; CONTINUOUS HEAT SPEED FAN SEQUENCE OF OPERATION
- Page 49 – Repair Parts List; All service must be performed by a licensed pro-
- Page 50 – Start−Up & Performance Check List; Gas Supply Pressure; Line Voltage; Flter
- Page 51 – Combustion CO; UNIT OPERATION
- Page 52 – Requirements for Commonwealth of Massachusetts; Modifications to NFPA−54, Chapter 10
Page 1
01/11
*2P0111*
506475−01
*P506475-01*
2010 Lennox Industries Inc.
Dallas, Texas, USA
AIR FLOW
DOWNFLOW
INSTALLATION
INSTRUCTIONS
ML193DF
MERIT
®
SERIES GAS FURNACE
DOWNFLOW AIR DISCHARGE
506475−01
01/2011
Supersedes 10/2010
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 installer (or
equivalent), service agency or the gas supplier.
Table of Contents
Unit Dimensions
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ML193DF Parts Arrangement
3
. . . . . . . . . . . . . . . . . . . . .
ML193DF Gas Furnace
4
. . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping and Packing List
4
. . . . . . . . . . . . . . . . . . . . . . . .
Safety Information
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Use of Furnace as a Construction Heater
5
. . . . . . . . . . .
General
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combustion, Dilution and Ventilation Air
6
. . . . . . . . . . . .
Setting Equipment
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filters
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Duct System
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pipe and Fittings Specifications
12
. . . . . . . . . . . . . . . . . . .
Joint Cementing Procedure
14
. . . . . . . . . . . . . . . . . . . . . .
Venting Practices
14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vent Piping Guidelines
15
. . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Piping
30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical
32
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Start Up
36
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Pressure Measurement
38
. . . . . . . . . . . . . . . . . . . . .
Proper Combustion
38
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Altitude
38
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Testing Non Direct Appliances for Proper Air
39
. . . . . . .
Other Unit Adjustments
40
. . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Motor Performance
41
. . . . . . . . . . . . . . . . . . . . . . .
Service
42
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Planned Service
44
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Integrated Control Diagnostic Codes
44
. . . . . . . . . . . . . .
Troubleshooting
45
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repair Parts List
49
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start Up Checklist
50
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Litho U.S.A.
"Loading the manual" means you need to wait until the file loads and becomes available for online reading. Some manuals are very large, and the time they take to appear depends on your internet speed.
Summary
Page 2 ML193DF Unit Dimensions − inches (mm) AIR EXHAUST AIR OUTLET COMBUSTION AIR INTAKE FLOW 2 − 1/16 (52) GAS PIPING INLET (Either Side) ELECTRICAL INLET (Either Side) RETURN AIR OPENING FRONT VIEW SIDE VIEW TOP VIEW A B C 3/4 (19) 27 − 3/4 19 − 1/4 (489) 9 − 1/8 (232) Right 6 − 9/16 (167) Left 2...
Page 3 ML193DF Parts Arrangement FIGURE 1 CONTROL BOX (Includes integrated control, transformer and door switch) BAG ASSEMBLY BLOWER MOTOR (hidden) BLOWER ACCESS PANEL BURNER ACCESS PANEL COMBUSTIONAIR INDUCER BURNER BOX ASSEMBLY (includes sensor, rollout switches and ignitor) GAS VALVE BLOWER DECK ...
Page 4 ML193DF Gas Furnace The ML193DF Category IV gas furnace is shipped readyfor installation in the downflow position. The furnace is equipped for installation in natural gas ap-plications. A conversion kit (ordered separately) is re-quired for use in propane/LP gas applications. The ML193DF can ...
