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Lennox Enlight LGT180H4M

Lennox Enlight LGT180H4M
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UNIT INFORMATIONUNIT INFORMATION
Service Literature
WARNING
To prevent serious injury or death:
1- Lock-out/tag-out before performing maintenance.
2- If system power is required (e.g., smoke detector
maintenance), disable power to blower, remove
fan belt where applicable, and ensure all
controllers and thermostats are set to the “OFF”
position before performing maintenance.
3- Always keep hands, hair, clothing, jewelry, tools,
etc., away from moving parts.
WARNING
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
Table of Contents
Options / Accessories . . . . . . . . . . . . . . . . . . . . . Page 2




Unit Parts Arrangement . . . . . . . . . . . . . . . . . . . Page 18
I-Unit Components . . . . . . . . . . . . . . . . . . . . . . . Page 18












options.

      



-


       
-



-


-

stages.
󰀨-

-
       


       
       

   󰀩

      
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LGT SERIES
13 to 25 ton
45.7 to 88 kW


LGT156 through 300
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Lennox Enlight LGT180H4M Specifications

General IconGeneral
BrandLennox
ModelEnlight LGT180H4M
CategoryFan
LanguageEnglish

Summary

Service Literature

LGT156 through 300

Service literature for LGT156 to LGT300 models.

Safety Warnings

General Safety Warnings

Critical warnings for preventing injury or death during operation/maintenance.

Options and Accessories

Economizer Options Detail

Description of different economizer operating modes.

Specifications

General Data and Cooling Performance

General unit information and cooling capacity specifications.

Gas Heating Specifications

Specifications for gas heating input, output, and efficiency.

Electrical Data

13 Ton Electrical Data

Electrical ratings for 13-ton models.

15 Ton Electrical Data

Electrical ratings for 15-ton models.

17.5 Ton Electrical Data

Electrical ratings for 17.5-ton models.

20 Ton Electrical Data

Electrical ratings for 20-ton models.

25 Ton Electrical Data

Electrical ratings for 25-ton models.

Gas Heat Components

Installation and Charging Procedures

Placement and Installation Instructions

Instructions for unit placement and installation.

Refrigerant Charge Confirmation

Procedures for refrigerant charging and checking.

Start-Up Operation

Preliminary Checks

Pre-start-up checks for unit installation and wiring.

Cooling Start-up Procedures

Procedures for initiating cooling operation.

Heating Start-up Procedures

Procedures for safely initiating heating operation.

Systems Service Checks

Heating System Service Checks

Procedures for checking the heating system.

Maintenance Procedures

Factory-Installed Hot Gas Re-Heat

VAV System Operation

VAV System Start-Up

Steps for starting up the VAV system.

Wiring Diagrams

Gas Heat Wiring Diagram

Wiring diagram for the gas heat section.

Sequence of Operation - Gas Heat

LGT156300 Gas Heat Sequence

Step-by-step operation for gas heat.

Sequence of Operation - Cooling

LGT156 Cooling Sequence

Step-by-step operation for LGT156 cooling.

LGT180 Cooling Sequence

Step-by-step operation for LGT180 cooling.

LGT210 Cooling Sequence

Step-by-step operation for LGT210 cooling.

LGT240300 Cooling Sequence

Step-by-step operation for LGT240/300 cooling.

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