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Air Conditioner Selection, Issue #015 -- an Expansion Valve, Corroded
February 05, 2008
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06 February 2008

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Table of contents

  1. Content Highlight on Air Conditioner Selection - PT AC

  2. Your eleventh tip. Tip #0011: an Expansion Valve, Corroded - how to prevent it

1. Content Highlight on Air Conditioner Selection - PT AC

PT AC is the abbreviation for packaged terminal air conditioner. It is called a packaged unit as it has both cooling, and heating function.

It is quite capable of removing and adding large BTUs of heat too, and looks like a window unit.

If you ask me, it looks very much like a window, or through the wall AC, but with a different name :-)


2. Your eleventh tip. Tip #0011: an Expansion Valve, Corroded - how to prevent it

I had a telephone conversation with a good friend of mine yesterday. We talked about a problem that he is facing with a chiller unit in a chemical plant that he's working in.

Oh by the way, a chiller unit works almost similar to an air conditioner. The difference lies in the size, physically and themodynamically, and the cooling & cooled medium.

The cooling and cooled medium is treated water.

By the way, he talked about the expansion valve corroded internally! I was shocked... for a moment.

Until he explained that the system's condenser leaked, and water under pressure leaked into the refrigerant system - corroding internal parts of the expansion valve.

What we can learn from this is (albeit the different system) that our domestic AC system is also prone to such material degradation, if we do not evacuate the system properly after first installation or major maintenance

As the famous saying goes... prevention is better than cure.


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All the best and we'll meet again in the next issue!

Enjoy.

MJK Nurul Amin,
"Be comfortable"
Chief Editor,
Air-Conditioner-Selection.com

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