Allied Air Enterprises 4AC18LT Placement, Line Set Isolation, Refrigerant Line Set Diameters

Page 4

Placement

Be aware that some localities are adopting sound ordinances based on how noisy the unit is at the neighbor’s home, not at the original installation. Install the unit as far as possible from the property line. When possible, do not install the unit directly outside a bedroom window. Glass has a verry high level of sound transmission. Figure 5 on page 5 shows how to place the outdoor unit and line set to reduce line set vibration.

Line Set Isolation

Illustrations on the pages 6 and 7 demonstrate procedures which ensure proper refrigerant line set isolation. Figure 6 shows how to install line sets on horizontal runs. Figure 7 shows how to make a transition from horizontal to vertical. Figure 9 shows how to install line sets on vertical runs.

Refrigerant Line Set Diameters (in.)

Liquid Line

Line S et Length and S ize

BTUH

 

12 ft. 25 ft. 50 ft. 75 ft. 100 ft.

24,000

3/8

3/8

3/8

3/8

3/8

36,000

3/8

3/8

3/8

3/8

1/2

48,000

3/8

3/8

3/8

1/2

1/2

60,000 3/8 3/8 3/8 1/2 1/2

S uction L ine

L ine S et L ength and S ize

B T U H

 

12 ft. 25 ft. 50 ft. 75 ft. 100 ft.

24,000

3/4

3/4

3/4

3/4

7/8

36,000

7/8

7/8

7/8

7/8

1-1/8

48,000

7/8

1-1/8

1-1/8

1-1/8

1-1/8

60,000 1-1/8 1-1/8 1-1/8 1-1/8 1-1/8

For installations exceeding 50’, contact

Technical Services.

Table 2

Brazing Connection Procedure

1.Cut ends of refrigerant lines square (free from nicks or dents). Debur the ends. The pipe must remain round; do not pinch end of line.

2.Before making line set connections, use dry nitrogen to purge the refrigerant piping. This will help to prevent oxidation and the introduction of moisture into the system.

3.Use silver alloy brazing rods (5% or 6% silver alloy for copper-to-copper brazing or 45% silver alloy for copper-to- brass or copper-to-steel brazing) which are rated for use with R410A refrigerant.

4.Remove the Schrader core assemblies before brazing to protect them from damage due to extreme heat. Replace the cores when brazing is complete.

5.Remove light maroon washers from service valves and shield light maroon stickers to protect them during brazing. Wrap a wet cloth around the valve body and copper tube stub to protect it from heat damage.

Outside Unit Placement & Installation

Install unit away from windows

Two 90° elbows installed in lineset will reduce lineset vibration

Figure 5

506469-01

Issue 1008

Page 5 of 24

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Contents 4AC18LT Series Lennox International Inc. CompanyInstallation Installation ClearancesTorque Table GeneralElectrical Wiring Slab MountingSlab Mounting Roof MountingPlacement Outside Unit Placement & InstallationLine 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 Flushing Procedure Required EuipmentExpansion Valve Systems Refrigerant Metering DeviceTXV Data To Access the Schrader Port To Close Liquid or Suction Line Service ValveUsing an Electronic Leak Detector EvacuationIssue START-UP Refrigerant Charge AdjustmentRefrigerant Charging Blocking Outdoor Coil R410A Temperature/Pressure Chart Check Charge Using Normal Operating PressuresSubcooling 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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