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R22 Superheat Subcooling Calculator Charging Chart Cards – 2007

4.7 out of 5 stars 32 customer reviews

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Product Details

  • Cards
  • Publisher: Nash Enterprise (2007)
  • ASIN: B001U54YJ2
  • Product Dimensions: 6.1 x 3 x 0.1 inches
  • Shipping Weight: 0.3 ounces
  • Average Customer Review: 4.7 out of 5 stars  See all reviews (32 customer reviews)
  • Amazon Best Sellers Rank: #286,743 in Books (See Top 100 in Books)

Customer Reviews

Top Customer Reviews

Format: Cards Verified Purchase
good product, but instructions not too simple to follow ...like for example you have to get the indoor temperature , but the temperature taken by the indoor unit outlet and 15 feet from the unit would be different that is on mini split system , same thing for the outdoor unit where should the temperature taken...
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Format: Cards Verified Purchase
I enjoy good quality tools, and this slide rule is one of them. Well worth the price. I use it in my business all the time.
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Format: Cards Verified Purchase
I have to say I'm happy with this product because it does what it's supposed to, keeps you from having to carry a calculator while you are already dealing with temperature meters and pressure gauges, but the outdoor temperatures for Superheating is in 5 degree increments and the gauge pressure for Subcooling is in 10 PSIG increments, meaning you have to do some on the fly interpolation between the scales anyway. There is a lot of unused white space on the card, I don't understand why they didn't make the scales more granular. Maybe trying to save on ink?
When trying to adjust a system by adding or recovering coolant, you aren't going to get to an exact degree of temperature or pound of gauge pressure anyway, systems just aren't deigned for that degree of accuracy, but I would like to start out with a more exact target to shoot for.
Still, it's still a handy tool and sometimes its good to have the little reminders printed on the card on when to add and remove, because trying to coax a unit into compliance while hanging around for an hour or so in full sun when its 110 degrees in the shade (if there was any shade) is enough to make the best of us a bit confused and forgetful at times.
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Format: Cards
I prefer this slide chart to any other I've used. Its small size makes it easier to handle and it fits in your probe thermometer box. The steps are easy to follow without the clutter. Shows standard dry bulb/ wet bulb approximations. Highly recommend.
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Format: Cards
If you don't want to spend a ton getting another electronic tool, this is super handy to have in the bag. Sometimes I don't have all my tools with me, so this is a quick and easy way to whip the manifold gauges on & verify whether you need to go get all the other tools. It's easy to read and understand only if you're familiar with HVAC. If not, you don't need this anyway, because it won't do you as much good as getting a technician out to help you.
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Format: Cards Verified Purchase
This slide chart is well made and easy to use for the application, Make determining the sub cooling and determining the super heat easier.
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Format: Cards Verified Purchase
Can get any easier, quick look up for R-22 with/without TXV
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By ALC on February 12, 2015
Format: Cards Verified Purchase
Everything I've ordered that I have used is perfect,thankd
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