Allied Air Enterprises manual 4AC18LT Series, Lennox International Inc. Company

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INSTALLATION AND MAINTENANCE INSTRUCTIONS

4AC18LT SERIES

Split System Air Conditioner

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WARNING

The equipment covered in this manual is to be installed by trained and experienced service and installation technicians. Improper installation, modification, service, or use can cause electrical shock, fire, explosion, or other conditions which may cause personal injury, death, or property damage. Use appropriate safety gear including safety glasses and gloves when installing this equipment.

WARNING

Risk of electrical shock. Disconnect all remote power supplies before installing or servicing any portion of the system. Failure to disconnect power supplies can result in property damage, personal injury, or death.

WARNING

Installation and servicing of air conditioning equipment can be hazardous due to internal refrigerant pressure and live electrical components. Only trained and qualified service personnel should install or service this equipment. Installation and service performed by unqualified persons can result in property damage, personal injury, or death.

WARNING

Sharp metal edges can cause injury. When installing the unit, use care to avoid sharp edges.

TABLE OF CONTENTS

 

INSTALLATION

2

START-UP

13

OPERATION

17

MAINTENANCE

21

CONNECTION DIAGRAM

23

Manufactured By

Allied Air Enterprises, Inc.

A Lennox International Inc. Company

215 Metropolitan Drive

West Columbia, SC 29170

*506469-01*

506469-01

Issue 1008

Page 1 of 24

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Contents Lennox International Inc. Company 4AC18LT SeriesInstallation Clearances InstallationTorque Table GeneralSlab Mounting Electrical WiringSlab Mounting Roof MountingOutside Unit Placement & Installation PlacementLine Set Isolation Refrigerant Line Set DiametersThermostat Designations Installing Refrigerant LineRefrigerant Piping Refrigerant Line Sets Installing Horizontal Runs Refrigerant Line Sets Transition from Vertical to Horizontal Required Euipment Flushing ProcedureExpansion Valve Systems Refrigerant Metering DeviceTXV Data To Close Liquid or Suction Line Service Valve To Access the Schrader PortEvacuation Using an Electronic Leak DetectorIssue START-UP Refrigerant Charge AdjustmentRefrigerant Charging Blocking Outdoor Coil Check Charge Using Normal Operating Pressures R410A Temperature/Pressure ChartSubcooling Values Approach Values for TXV SystemsIssue Operation Flash Codes Flash Codes Miswired Module Troubleshooting Indoor Coil MaintenanceIndoor Unit Start-Up and Performance Checklist Wire Diagram Issue

4AC18LT specifications

Allied Air Enterprises has made significant strides in the HVAC industry with the introduction of its 4AC18LT air conditioner. This model is part of a premium line of products that emphasizes efficiency, reliability, and advanced cooling technology. The 4AC18LT is specifically designed to meet the diverse needs of both residential and light commercial applications, making it a versatile choice for many consumers.

One of the standout features of the 4AC18LT is its impressive Seasonal Energy Efficiency Ratio (SEER) rating. With a SEER rating of up to 18, this unit is engineered to provide excellent energy efficiency, significantly reducing electricity consumption while delivering consistent cooling performance. As energy costs continue to rise, homeowners and businesses can benefit greatly from this efficiency, leading to lower monthly utility bills and a reduced carbon footprint.

The 4AC18LT employs advanced R-410A refrigerant, which is known for its environmentally friendly properties. Unlike older refrigerants that contribute to ozone depletion, R-410A is more stable and offers better heat transfer capabilities, which enhances the overall performance of the unit. This focus on eco-friendliness aligns with contemporary environmental standards and regulations, ensuring that users are making a responsible choice for their cooling needs.

In terms of design, the 4AC18LT features a robust and compact frame that is built to withstand the rigors of outdoor installation. The unit's durability is further enhanced by its corrosion-resistant finish, which protects the coil and cabinet from harsh weather conditions, extending the life span of the system.

Noise reduction technology is another highlight of the 4AC18LT. This model is designed with a quieter operation in mind, utilizing a sound blanket and insulated compressor compartment. These features work together to minimize noise levels, allowing users to enjoy a comfortable indoor environment without disruptive sound.

The 4AC18LT also supports advanced controls and compatibility with smart thermostats, providing users with greater flexibility and convenience. Homeowners can take advantage of programmable features, enabling them to optimize cooling schedules for energy savings and increased comfort.

Overall, Allied Air Enterprises’ 4AC18LT air conditioner combines efficiency, environmental responsibility, durability, and user-friendly features, making it an excellent choice for those in need of reliable cooling solutions. Whether installed in a residential or light commercial setting, the 4AC18LT promises to deliver exceptional performance and peace of mind.
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