Digital Zeus™ HVAC Tool & Instruments Journal

This is an active thread on the PROTech Boards and is an excerpt from our upcoming publication,  Manifold Gauges: Φ The Definitive Guide© .

You don’t hear or read a whole lot on the actual manifold as a component I mean comparative to the amount of discussions, threads and articles about the gauge.

This is a piece out of the Manifold Gauge: The Definitive Guide that I’ve been “working” on for the past several months. In the Definitive Guide we look at the hoses, the valves, the analog, the digital and yep, you guessed it the manifold. This is practice in the art of deception at it’s best.

We’re going to play a little game here for the next few days. Take a look at the manifold below - after you get tired of looking at it - in a reply to the thread, tell me what you see wrong with it. I’ll answer it in a few days and we’ll see who’s been paying attention.

For you old codgers, if you can’t see the manifold well enough above, click the image below to open a high resolution copy. Ready - Set………………………………….Play.

I should note this is not a machining error we are looking for. This is a deceptive design practice that we will discuss in greater detail in the Definitive Guide.

Friend sent this image of a recovery system he ran across while surfing. Recovery Speeds (these are typical averages):

Low Pressure: 125 lbs/minute (7500 lbs/hour)
High Pressure: 300 lbs/minute (18000 lbs/hour)

Wonder what it would take to build one of these bad boys.

~ Proper Recovery Procedures ~

Recovery cylinders are generally provided with a dual-port liquid/vapor valve allowing for the recovery and reuse of the refrigerant. The more commonly used recovery cylinders are of a 26-lb or 48-lb water capacity.

Using these values, a 26 lb. cylinder will have a recovery capacity of 20.8 lbs., while a 48 lb. cylinder will have a recovery capacity of 38.40 lbs.

This value will be stamped on the neck of your cylinder in “ WC. 80% of that value is the total recovery capacity of the cylinder you are using.

Read the TW, or Tare “Empty” weight of your cylinder. To this value, add 80% of the “ WC value stamped on your cylinder. Your result will be the full legal recovery weight of your cylinder.

When recovering refrigerants from a system, Service technicians must be careful to ensure that they never fill a cylinder beyond the 80% value. Cylinders filled beyond this point are unsafe and could vent refrigerant to relieve the excess pressure contained in the cylinder.

Read the Rest of this Thread: http://hvacprotech.forumwise.com/hvacprotech-thread2249.html