Issue:
ACR and RTAE Condenser Coil Tube
Resolution:
STARTING in May 2023
Pueblo ACR R513A all sizes, can only be configured with all-aluminum microchannel condenser coils
======================================
Starting in 2022
Pueblo ACRB 150 to 300 sizes (R134a), can only be configured with condenser coils made with aluminum fins and copper tubes.
seamless copper tubes, 0.0132" wall thickness
Aluminum fins, 0.005" thickness
======================================
Prior to 2022
The ACR and RTAE is built standard with an all-aluminum condenser coil, reducing the risk of galvanic corrosion. The coil will have aluminum fins mechanically bonded to internally finned seamless long life alloy aluminum tubing.
Aluminum Tube
- UNS A93020 aluminum long life alloy
- 0.375" OD
- 0.027" wall
- Internally finned
The coil construction utilizes a manifold cast aluminum header design coupled with hairpin bends that eliminate U-bend braze joints and minimizes the potential for refrigerant leaks. All tube connections are mechanical except the brazed copper to aluminum inlet and outlet connections. To protect the copper/aluminum joint, an asphalt based tape is factory applied.
The coil is factory proof tested at 525 psig and leak tested with helium in a mass spectrometer chamber at 150 psig.
See What is the aluminum fin thickness? for information on the aluminum fins
Notes:
Changes:
Other Question/Problem/Cause Statements:
- ACR condenser material
- ACR aluminum tube spec
- Specifications of the RTAE condenser coil tube
- What is the wall thickness of the aluminum tube?
- What is the diameter of the aluminum tube?
- What material is the RTAE condenser tube?
- Are the RTAE condenser tubes copper?
- Information on the aluminum condenser tubes?
- ACR microchannel MCHE coils
Facts:
- Air-Cooled Chiller (Pueblo) (ACR)
- Air-Cooled Chiller (Pueblo) (RTAE)
Document Identifier: DOC-105525
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.