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R22 Superheat Subcooling Calculator Charging Chart Cards – 2007

23 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: 4.6 out of 5 stars  See all reviews (23 customer reviews)
  • Amazon Best Sellers Rank: #111,121 in Books (See Top 100 in Books)

Customer Reviews

Most Helpful Customer Reviews

3 of 3 people found the following review helpful By Fred D. on December 22, 2011
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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1 of 1 people found the following review helpful By Keith on October 15, 2011
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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1 of 1 people found the following review helpful By Coheed on June 8, 2013
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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1 of 1 people found the following review helpful By boiler on May 20, 2012
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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1 of 2 people found the following review helpful By Atlanta Network Guy on October 23, 2012
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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By chris on July 1, 2012
Format: Cards Verified Purchase
This Calculator charging chart is very helpful when trying to determine the proper charge on a txv and non txv system,and it's not too big to keep in the truck and not too small that u can't read it.
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By John A. Groves on November 2, 2012
Format: Cards Verified Purchase
This chart is a good reference for working on a R-22 system, especially if you are new to the business. Remember, you must have a license to work with refrigerant.
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By Brandy on August 29, 2012
Format: Cards Verified Purchase
The product was exactly what my husband had been looking for, I am happy I was able to find it... and it was shipped in perfect condition and extremely fast.
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