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cover of episode HVAC Evacuation Myths for Installers to Fix System Failures with Torque Tools – David Rames Part 2

HVAC Evacuation Myths for Installers to Fix System Failures with Torque Tools – David Rames Part 2

2025/6/26
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HVAC Know It All Podcast

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David Rames
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Gary McCready
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Gary McCready: 作为暖通技术人员,我认为在多联机系统的安装中,对每个区域的管道和线路进行单独的压力测试和抽真空至关重要。这能确保每个连接点的密封性,特别是喇叭口,避免制冷剂泄漏。我亲眼见过年轻技术人员不熟悉喇叭口规,导致喇叭口角度不正确,最终泄漏。因此,我认为使用正确的工具和方法,如扭矩扳手和喇叭口规,对于保证安装质量至关重要。此外,安装手册包含了所有必要的信息,应该仔细阅读并遵循。 David Rames: 作为Midea的产品经理,我强调压力测试的重要性,它能有效检测喇叭口的密封性,避免制冷剂泄漏。在填充制冷剂之前,确保系统密封良好非常重要,可以避免因喇叭口问题导致的制冷剂泄漏和返工。我认为扭矩范围的存在是因为不同的扭矩扳手可能存在差异,允许一定的误差。如果在压力测试中发现泄漏,可以逐渐增加扭矩至上限。此外,在多联机系统中,保持系统清洁非常重要,因为没有液体管路干燥过滤器。Midea产品不使用液体管路干燥过滤器,因为我们认为如果保持系统清洁并正确扩口,则没有必要。

Deep Dive

Chapters
This chapter emphasizes the importance of individual pressure testing and evacuation for each line set in multi-zone ductless systems. It highlights how this prevents leaks and ensures a successful installation.
  • Each line set in a multi-zone ductless system must be individually pressure tested and evacuated.
  • Pressure testing identifies leaks before refrigerant is added.
  • Proper flaring is crucial; a flare gauge ensures a 45-degree angle.

Shownotes Transcript

In this episode of the HVAC Know It All Podcast, host Gary McCreadie) continues his conversation with David Rames), Senior Product Manager at Midea America). In Part 2, David talks about the importance of pressure testing and evacuating each line set in multi-zone ductless systems. He emphasizes using a torque wrench to avoid over-tightening flare nuts, which can cause leaks. David also explains the dry mode feature in Midea systems, designed to control humidity effectively. The episode wraps up with advice on proper installation, maintenance, and the value of training to ensure quality work and satisfied customers. David Rames discusses the importance of pressure testing and evacuating each line set in multi-zone ductless systems. He explains how using a torque wrench can prevent over-tightening flare nuts, which can cause refrigerant leaks. David also highlights the dry mode feature in Midea systems, which helps manage humidity by slowing down the fan and cooling the room. The episode wraps up with advice on proper installation, leak testing, and the need for thorough training to ensure quality installs and satisfied customers. Throughout this episode, David talks about the steps to ensure a proper installation in multi-zone ductless systems. He explains the importance of pressure testing and evacuating each line set separately to avoid leaks. David also discusses the need for using a torque wrench to avoid over-tightening flare nuts. He highlights the dry mode feature in Midea systems, which helps control humidity. Lastly, he shares tips on doing thorough training and following manuals to get the best results on every job. Expect to Learn:

Why is pressure testing and evacuating each line set crucial?

How a torque wrench prevents over-tightening flare nuts.

What the dry mode feature in Midea systems does for humidity control.

The importance of following the installation manual for better results.

Why thorough training ensures high-quality installs and satisfied customers.

Episode Highlights: [00:00] - Intro to Part 02 with David Rames [01:33] - Key steps for pressure testing and evacuation [02:59] - Using a torque wrench the right way [05:36] - Manuals matter for a clean install [07:23] - Understanding torque ranges and flare fitting [09:25] - Leak testing tips and skipping filter dryers [10:56] - Doing evacuation and decay tests properly [13:56] - Good installs stop blaming on equipment [16:42] - Using dry mode for better humidity control [18:12] - How dry mode changes fan speed and coil temp [20:12] - When misuse, not installation, causes complaints [25:21] - Wrap-up and where to learn more about Midea 🔥 Think You’ve Got What It Takes? Enter the ServiceTitan HVAC National Championship powered by Trane for your shot at $100K and a trip to Florida! 📅 Complete the quiz by June 30 to qualify for the next round. 👉 Take the Quiz Here: https://www.hvacnationals.com/This Episode is Kindly Sponsored by: Master: https://www.master.ca/) Cintas: https://www.cintas.com/) Supply House: https://www.supplyhouse.com/) Cool Air Products: https://www.coolairproducts.net/ ) Follow the Guest David Rames on: LinkedIn: https://www.linkedin.com/in/david-rames-06742814/) Midea America: https://www.linkedin.com/company/midea-america-corp/) HVAC Nationals Competition: https://www.hvacnationals.com/) Follow the Host: LinkedIn: https://www.linkedin.com/in/gary-mccreadie-38217a77/) Website: https://www.hvacknowitall.com) Facebook: https://www.facebook.com/people/HVAC-Know-It-All-2/61569643061429/ ) Instagram: https://www.instagram.com/hvacknowitall1/ )