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How to read freon gauges - Bookshelf


738 pages

Basic Refrigeration and Air Conditioning

Air conditioning - 2013

Now coming back to our refrigeration system, as explained earlier, air and moisture in the system should be removed ... Even a good, well-calibrated compound gauge cannot read anything less than 735 or 750 mm (29 or 291⁄2≤) accurately.

Publisher: Tata McGraw-Hill Education



400 pages

Today's Technician: Automotive Heating & Air Conditioning

Creator: Mark Schnubel | Technology & Engineering - 2008-08-11

HFC-134a is hydrofluorocarbon refrigerant gas used as a refrigerant and is also known as R-134a. This refrigerant is not ... Low-side gauge is the left-side refrigerant gauge on the manifold used to read pressures on the low side of the system.

Publisher: Cengage Learning

About this book
Today's Technician: Heating & Air Conditioning, 4E is a two-book set that separates theory and diagnostic content into Classroom and Shop Manuals. This separation allows readers to learn theories of heating and air conditioning before applying them, with the benefit of cross-referenced page numbers in each manual to link related material. Updated to reflect the industry's latest developments and trends, this edition includes expanded coverage of basic theories, as well as all-new sections on upgraded equipment, sealant contamination and testing, and non-compressible gas contamination. In addition, the information on compressors has been updated to include new hybrid electric compressors and the safety issues that accompany them. With this up-to-date, technically accurate information, this is a valuable resource for learning the theory, components, diagnosis and repair of modern automotive heating and air conditioning systems.Important Notice: Media content referenced within the product description or the product text may not be available in the ebook version.



592 pages

Today's Technician: Automotive Heating & Air Conditioning Classroom Manual and Shop Manual

Creator: Mark Schnubel | Education - 2016-01-25

Chapter 5 The Manifold and Gauge Set BASIC TOOLS Manifold and gauge set with hoses Safety glasses or goggles ... Low-side gauge is the left-side refrigerant gauge on the manifold used to read pressures on the low side of the system.

Publisher: Cengage Learning

About this book
Updated to reflect the latest trends, technology, and relevant NATEF standards, this integrated, two-book set covers theory and hands-on content in separate Classroom and Shop Manuals. This innovative approach allows students to learn fundamental climate control theory, including basic physics related to heat transfer, before applying their knowledge through practical, hands-on shop work. Cross-references in each manual link related material, making it easy to connect classroom learning to lab and shop activity.Important Notice: Media content referenced within the product description or the product text may not be available in the ebook version.


Gauges Directory

How to Use Freon Gauges | eHow
How to Use Freon Gauges. A vehicle owner who wishes to charge his air conditioning system soon finds out that the procedure does not involve simply hooking a can and ...

How to Read AC Auto Gauges | eHow
How to Read AC Auto Gauges. Connecting air conditioning gauges, also called a manifold gauge set, is only half of the battle of properly diagnosing a vehicle's air ...

Industrial Valves,Industrial Pressure Gauges,Temperature ...
With an industrial experience of many years, Shubh Instruments have been engaged in offering industrial pressure gauges, pressure gauges, temperature gauges ...

How to Recover Freon from an Air Conditioning Compressor
How to Recover Freon from an Air Conditioning Compressor. "DISCLAIMER" (READ THIS FIRST!!!) The steps found in this article must only be performed by a licensed HVAC ...

HVAC Manifold Gauges and P/T Chart - YouTube
I show how to read manifold gauges and P/T chart. Attention: Do not try any of what you see in this video at home. It takes at least two years of HVACR ...


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Editor's picks

  • Grace Marketing- HI

    Pit Bull CHIMG777 Pit Bull CHIMG777 R12 A/C Air Conditioning Ac Refrigerant Manifold-Gauge Set

    Home Improvement (Grace Marketing- HI)

    Rating (177 reviews):
    (4.0/5)
    Grace Marketing- HI

    Meh ...

    It worked, it's cheap but if you only need it for a once a year or every couple years job then it's good enough for that without spending 3-5x as much on a better gauge set.Mine came with the plastic lens on the high pressure gauge laying in the bottom of the box. The lenses are very cheap plastic, made like a mayonnaise jar lid and they screw on. So don't freak out if you think you got a broken gauge, just screw the lens back on.It doesn't have the high-pressure fitting that GM vehicles use on the high pressure side of the A/C system. So if you're going to use it on a General Motors vehicle AND you need a high side pressure reading then you'd better look into getting an adapter.It finger tightened up just fine on the fittings I used it for and it doesn't appear to leak or waste coolant, so that's a plus. I had no signs of a leak (frost is a very good indicator of a leak) and they connected up to what they fit on exactly as they should. If you... 2/5 S.L. (Sic Semper Tyrannis) - See all my reviews Verified Purchase(What's this?) This review is from: Pit Bull CHIMG777 Pit Bull CHIMG777 R12 A/C Air Conditioning Ac Refrigerant Manifold-Gauge Set (Tools & Home Improvement) It worked, it's cheap but if you only need it for a once a year or every couple years job then it's good enough for that without spending 3-5x as much on a better gauge set.Mine came with the plastic lens on the high pressure gauge laying in the bottom of the box. The lenses are very cheap plastic, made like a mayonnaise jar lid and they screw on. So don't freak out if you think you got a broken gauge, just screw the lens back on.It doesn't have the high-pressure fitting that GM vehicles use on the high pressure side of the A/C system. So if you're going to use it on a General Motors vehicle AND you need a high side pressure reading then you'd better look into getting an adapter.It finger tightened up just fine on the fittings I used it for and it doesn't appear to leak or waste coolant, so that's a plus. I had no signs of a leak (frost is a very good indicator of a leak) and they connected up to what they fit on exactly as they should. If you... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , August 28, 2012

    Functional

    3/5 Trey D Rouse - See all my reviews Verified Purchase(What's this?) This review is from: Pit Bull CHIMG777 Pit Bull CHIMG777 R12 A/C Air Conditioning Ac Refrigerant Manifold-Gauge Set (Tools & Home Improvement) The product is as it is displayed. The hoses are very short and it does not come with the 3/8 fitting/hose for the alternate high pressure fitting used on some vehicles.If you really want to be able to get the job done, your going to have to buy and additional set of fittings and adapters.The set is sufficient quality for a weekend warrior / hobby mechanic, but I would not recommend them for professional use, there are much better sets out there. A used higher quality set from craigslist would be a better find. Help other customers find the most helpful reviews  Was this review helpful to you? , April 15, 2011

    great set for the money

    5/5 rrand - See all my reviews Verified Purchase(What's this?) This review is from: Pit Bull CHIMG777 Pit Bull CHIMG777 R12 A/C Air Conditioning Ac Refrigerant Manifold-Gauge Set (Tools & Home Improvement) This is perfect set for doing R-12 and R-22 units because you dont have to spend a lot of money for the high priced guages.I charged up my home unit with these and they worked perfect.Very good Quality for that price.fast shipping too.Thanks Help other customers find the most helpful reviews  Was this review helpful to you? , July 25, 2011
    Color-Coded Gauges, Valves and Hoses
    Complete Diagnostic and Service Gauge Set for use on Air Condition Systems
    Easy to Read Gauges
    Quick-Connect Fittings with High Pressure Safety Valve
    3 Color-Coded Hoses


  • ARKSEN

    ARKSEN© Manifold Gauge Colored Hose Air Conditioner Freon R134a R12 R22 AC A/C

    Home Improvement (ARKSEN)

    No-flutter gauge design | Solid Brass connections
    Designed to meet 1/4" Standard SAE requirement for refrigerant permutation
    Quick disconnect couplers for high/low fittings included
    Operating Pressure: 600 PSI | Burst Pressure: 3000 PSI
    Aluminum alloy manifold testing body with built in sight glass | High or Low Pressure adjustable


  • Enviro-Safe

    Enviro-Safe R12/R22 Can Tap with Gauge - R-134a Can to R-12/R-22 Port

    Automotive Parts and Accessories (Enviro-Safe)

    End fits R12, 22, 502 fittings
    Gauge has scale readings for R134, R12, & 22
    20" long hose


  • XtremepowerUS

    XtremepowerUS R12 R22 R134A R502 A/C Air Conditioning Ac Refrigerant Manifold-Gauge Set

    Automotive Parts and Accessories (XtremepowerUS)

    Fittings with high pressure safety valve
    Automotive diagnostic and service tool kit
    Easy to read gauges. Has Reading of R12 R22 R134a R502
    Freon Charging hose 2500PSI burst, 500PSI max W.P
    Three (3) 3ft color-coded service hose


  • Interdynamics

    Interdynamics MAC-134 EZ Chill Refrigerant Refill with Charging Hose and Gauge - 18 oz.

    Automotive Parts and Accessories (Interdynamics)

    Rating (235 reviews):
    (4.2/5)
    Interdynamics

    4.75 Stars for an EZ AC Fix

    I'm not an expert, so I really liked that the refilling process was simple.1. Wait until the weather outside is between 75F to 85F (because that's what temperature gauge was calibrated to(some other refrigerants have a variable weather adjustment, but not this company)).2. Turn your car on, set the AC to full blast and wait a few minutes.2. Screw the small end of the hose to the refrigerant can head.3. Attach the big end of the hose to the low side port by holding back the quick release of the hose and then letting go of it when the hose is on the port.4. Let the gauge measure the pressure. If your gauge is not working correctly, it's probably because your compressor is not spinning (it stops spinning when your car is really low on refrigerant). You need to add a bit of refrigerant at this point just to get a pressure reading.5. Take the blue cap off the can and spray for a couple minutes. Make sure to have the... 5/5 P - See all my reviews Verified Purchase(What's this?) This review is from: Interdynamics MAC-134 EZ Chill Refrigerant Refill with Charging Hose and Gauge - 18 oz. (Automotive) I'm not an expert, so I really liked that the refilling process was simple.1. Wait until the weather outside is between 75F to 85F (because that's what temperature gauge was calibrated to(some other refrigerants have a variable weather adjustment, but not this company)).2. Turn your car on, set the AC to full blast and wait a few minutes.2. Screw the small end of the hose to the refrigerant can head.3. Attach the big end of the hose to the low side port by holding back the quick release of the hose and then letting go of it when the hose is on the port.4. Let the gauge measure the pressure. If your gauge is not working correctly, it's probably because your compressor is not spinning (it stops spinning when your car is really low on refrigerant). You need to add a bit of refrigerant at this point just to get a pressure reading.5. Take the blue cap off the can and spray for a couple minutes. Make sure to have the... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , May 12, 2014

    2003 Jetta TDI A/C Recharge Success

    My A/C pump was not engaging and the dual radiator fans were not turning on when I had the key in the on position and the AC button pressed in. I used this product and now the A/C pump is turning on and the AC is running somewhat cold.Instructions are a little vague so I will share with you my process.TO TEST: I tested with the car engine off to see if the pressure was low. Pressure was low so I turned the car on to fill the system.TO FILL: Car engine must be running the entire time (regardless of vehicle). The 134a refrigerant cannot enter the system with the car engine off. When you press the button to fill the gauge jumps up to the red 'danger' level. This is normal all you do is release button to see the effects of your fill. During the fill, I pressed the button on for 4 seconds and released the button to check my progress. Once I noticed the system pressure did not change much (when button was not pressed in) I incresed the button on time to... 4/5 Danielle (Walla Walla, WA USA) - See all my reviews This review is from: Interdynamics MAC-134 EZ Chill Refrigerant Refill with Charging Hose and Gauge - 18 oz. (Automotive) My A/C pump was not engaging and the dual radiator fans were not turning on when I had the key in the on position and the AC button pressed in. I used this product and now the A/C pump is turning on and the AC is running somewhat cold.Instructions are a little vague so I will share with you my process.TO TEST: I tested with the car engine off to see if the pressure was low. Pressure was low so I turned the car on to fill the system.TO FILL: Car engine must be running the entire time (regardless of vehicle). The 134a refrigerant cannot enter the system with the car engine off. When you press the button to fill the gauge jumps up to the red 'danger' level. This is normal all you do is release button to see the effects of your fill. During the fill, I pressed the button on for 4 seconds and released the button to check my progress. Once I noticed the system pressure did not change much (when button was not pressed in) I incresed the button on time to... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , July 16, 2012

    Great stuff and yes you can order it without a license...

    5/5 Handy Technician - See all my reviews Verified Purchase(What's this?) This review is from: Interdynamics MAC-134 EZ Chill Refrigerant Refill with Charging Hose and Gauge - 18 oz. (Automotive) I was very pleased to be able to receive this product from Amazon, I know that the EPA has lifted restrictions on the sales of Freon to only certified technicians but surprisingly the Automotive stores in my area told me they still wouldnt sell it to just anyone... I told them I'ld get it on-line, good luck with that was their response. I received and installed this product and my AC works good as new!!! Help other customers find the most helpful reviews  Was this review helpful to you? , July 29, 2011
    Restores lost refrigerant and oil
    Contains leak sealer to stop most common leaks in rubber hoses gaskets and O-rings
    All in one solution
    Self dispensing can has reusable recharge hose and in line pressure gauge
    Easy to read gauge


  • ARKSEN

    ARKSEN© Air Conditioner Freon R410 R22 R134 R407C AC Manifold Gauge Set 5FT Colored Hose

    Automotive Parts and Accessories (ARKSEN)

    Rating (6 reviews):
    (4.2/5)
    ARKSEN

    It works fine and looks pretty good

    4/5 AM (Florida) - See all my reviews Verified Purchase(What's this?) This review is from: ARKSEN© Air Conditioner Freon R410 R22 R134 R407C AC Manifold Gauge Set 5FT Colored Hose The Gauge seems robust enough and works well. Since the gauges are in metric (MPa) and all the documentation I have on A/C is SAE, I printed the conversions to SAE, cut them out, and stuck them to calibration lines on the gauge, then replaced the protective cover. It works fine and looks pretty good. I don't know how long the gluestick adhesive would hold out though. The only issue I have is the Red and Blue Quick connect couplers (shown in the product photograph) for the 134 refrigerant for your vehicle, could not attach to the hose for the gauge. A 5/16" adapter was needed. I got two and they work well. I would have expected that Quick Connect Couplers would have had the correct fittings, since they are provided with the unit. It is not an issue, just an added, unexpected expense. Help other customers find the most helpful reviews  Was this review helpful to you? , May 7, 2016

    Good gauge set

    5/5 Marc Burningham (Layton, Utah USA) - See all my reviews, September 8, 2015

    AC gages

    4/5 Horst - See all my reviews Verified Purchase(What's this?) This review is from: ARKSEN© Air Conditioner Freon R410 R22 R134 R407C AC Manifold Gauge Set 5FT Colored Hose They work good, only complaint they read metric. I just printed out a conversion table. Other than that they are good Help other customers find the most helpful reviews  Was this review helpful to you? , May 6, 2016
    Vibration resistant gauges feature a flutter-free design with provides accurate readings
    Color coded hoses help identify the hoses for added convenience
    Heavy duty aluminum manifold body is highly durable and lightweight
    Can be used for automotive or household air conditioning units
    Our easy to read 2-7/8" gauges feature 4 MPA scales (R143a, R404a, R410a, R22)


  • ARKSEN

    ARKSEN© 3CFM 1/3HP Air Vacuum Pump HVAC + A/C Refrigeration 4 Valve Manifold Gauge

    Home Improvement (ARKSEN)

    Rating (6 reviews):
    (3.3/5)
    ARKSEN

    Five Stars

    5/5 Michael Ortega - See all my reviews Verified Purchase(What's this?) This review is from: ARKSEN© 4 -Valve Manifold Gauge, R404A R410A R22 HVAC, A/C, Brass Adapters, Red Excellent value, good quality item exactly as ordered and delivered early. Help other customers find the most helpful reviews  Was this review helpful to you? , August 11, 2015

    ... to put them once you put them on I like the extra ports on the other gauges to put ...

    1/5 tim - See all my reviews Verified Purchase(What's this?) This review is from: ARKSEN© 4 -Valve Manifold Gauge, R404A R410A R22 HVAC, A/C, Brass Adapters, Red The gauges are okay 2 the manifold hoses there's nowhere to put them once you put them on I like the extra ports on the other gauges to put the hoses on and also the gauges were the ports hook up it's too much rubber on there it will not let Freon come through Help other customers find the most helpful reviews  Was this review helpful to you? , May 8, 2016

    Everything else work's great. Fair price

    3/5 William flynn - See all my reviews Verified Purchase(What's this?) This review is from: ARKSEN© 4-Way Valve Manifold Gauge Diagnostic w/ Case + 5CFM 1/2HP Rotary Vauum Pump Set (Misc.) Product as described.Low pressure gauge not functioning.Everything else work's great.Fair price.Fast shipping Help other customers find the most helpful reviews  Was this review helpful to you? , April 26, 2016
    Compatibility: R404a, R410a, R22; Hose Length: 5 Feet
    Free Air Displacement: 3 CFM; Power: 1/3 HP; Inlet Port: 1/4" Flare
    Color coded hoses help identify the hoses for added convenience
    Quickly and effectively removes moisture and air arom air conditioning systems
    Operating Pressure: 800 PSI; Burst Pressure: 4000 PSI


  • ARKSEN

    ARKSEN© A/C Manifold Gauge R410 R22 R134 R407C Set + 3CFM Rotary Vacuum Pump 1/3HP

    Automotive Parts and Accessories (ARKSEN)

    Easy to read 2-7/8" gauges feature 4 MPA Reading (R143a, R404a, R410a, R22)
    Direct drive motor allowing easy starting and is maintenance free
    Color coded hoses help identify the hoses for added convenience
    Hose Connectors: 1/4" SAE; R410A Connectors: 5/16" SAE
    Quickly and effectively removes moisture and air arom air conditioning system


  • ARKSEN

    ARKSEN© Manifold Gauge Set R134a A/C 5FT Colored Hose Freon

    Automotive Parts and Accessories (ARKSEN)

    Rating (19 reviews):
    (3.7/5)
    ARKSEN

    Avoid this item!

    1/5 sam - See all my reviews Verified Purchase(What's this?) This review is from: ARKSEN© Manifold Gauge Set R134a A/C 5FT Colored Hose Freon (Automotive) The package does not include the connection fitting to connect to R134 tank. The fitting converter to be used with R134 type nipples on the vehicle, does not fit on the high pressure side of AC unit. The O rings on the hoses deteriorated after on use, making the entire package unusable. I do not recommend it to anyone. I wish I could get the seller to honor some-kind of warranty. I bought this item in january 2014 and have used it only one time before it fell apart Help other customers find the most helpful reviews  Was this review helpful to you? , May 24, 2014

    Overall a good product

    3/5 terry a. skelton - See all my reviews Verified Purchase(What's this?) This review is from: ARKSEN© Manifold Gauge Set R134a A/C 5FT Colored Hose Freon (Automotive) Great price. Gauges are thorough. Hoses are troublesome due to type of hose construction. They are somewhat inflexible. The R12 hosends are small and difficult to get tight with your fingers. I had to use pliers. The kit gets the job done with minor inconvenience. Easily overlooked for the price. Help other customers find the most helpful reviews  Was this review helpful to you? , November 28, 2013

    Looks OK so far

    I took a chance on this since there were no reviews. It just arrived and here are my first impressions:The gauge set feels pretty solid and the box was marked with Arksen PN# 002-AU-20141 which I have seen for about $55 by itself elsewhere. There is a piece of loose gasket material or a metal shaving under the sight glass so I will have to open that and clean it out. The hanger hook was loose in the case (not attached) and the fittings on the QD's were loose. All 3 hoses measure 58" not the advertised 72". The pump has a different handle than what is pictured but appears sturdy. For the price, all of this is trivia provided it works. I can't rate it over 3 stars until I test it, but so far so good.Follow-up. I cleaned the sight glass and flushed the gauge manifold. The set held vacuum for 2 days when I tested it for leaks. I suspect I vented it accidentally when I moved it on my bech and twisted a hose. I did an AC service on my Jeep this weekend... 5/5 CylonFan - See all my reviews Verified Purchase(What's this?) This review is from: ARKSEN© 3CFM Vacuum Pump and R134a Manifold Gauge Set (Misc.) I took a chance on this since there were no reviews. It just arrived and here are my first impressions:The gauge set feels pretty solid and the box was marked with Arksen PN# 002-AU-20141 which I have seen for about $55 by itself elsewhere. There is a piece of loose gasket material or a metal shaving under the sight glass so I will have to open that and clean it out. The hanger hook was loose in the case (not attached) and the fittings on the QD's were loose. All 3 hoses measure 58" not the advertised 72". The pump has a different handle than what is pictured but appears sturdy. For the price, all of this is trivia provided it works. I can't rate it over 3 stars until I test it, but so far so good.Follow-up. I cleaned the sight glass and flushed the gauge manifold. The set held vacuum for 2 days when I tested it for leaks. I suspect I vented it accidentally when I moved it on my bech and twisted a hose. I did an AC service on my Jeep this weekend... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , January 15, 2016
    Red Gauge (High): 2-1/2 Inch Diameter, 0-500 PSI
    Yellow 5Ft Long Charging Hose (1/4 Inch ACME X 72 Inch With Auto Shut-Off Fittings)
    Burst Pressure: 3000PSI / Max Working Pressure: 600PSI
    Blue Gauge (Low): 2-1/2 Inch Diameter, 0-120 PSI With 0-40 VAC
    Red & Blue 5Ft Long Charging Hose (1/4 Inch FFL X 72 Inch With Knurled Fittings)


  • Seasky

    Generic HVAC R134a Aluminum Air Conditioner Manifold Gauge Set 60 inch Colored Hose Air Conditioner

    Automotive Parts and Accessories (Seasky)

    A sight glass Aluminum testing manifold body
    Designed to meet 1/4 SAE requirement for refrigerant permutation
    With QC -019L& QC-19H quick couplers and hand carrying case
    Working pressure 600PSI Burst 3000PSI


Gauges