Spare parts direct store - http://spare-parts-direct.com

How to read freon gauges -





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 HVAC Gauges - Central Air Conditioner And ...
How to Read HVAC Gauges. ... In HVAC field, we don’t have single set of HVAC gauges that work on every refrigerant. It saves us money and time if we have it.

HVAC Manifold Gauges and P/T Chart
I show how to read manifold gauges and P ... HVAC Manifold Gauges and P ... How to Charge An Air Conditioner That Is Low On Freon Through The Suction ...

How to Charge An Air Conditioner That Is Low On Freon Through The Suction Side Real Time
How to charge an AC when your gauges are on their last leg and you can not trust them. ... How to charge a typical split system that is low on freon.

Refrigerant Gas Test Gauge: how to connect and use
... Freezer, etc. How to hook up a refrigerant test / charging gauge set to the test ports ... How to Read the Low Pressure Side Refrigerant Gauge.

Geeks Of Cars: How to Read an R-134A Manifold Gauge Set
How to Read an R-134A Manifold Gauge Set. ... Refrigerant can immediately cause severe frostbite, so there are many safety precautions to take. Furthermore, ...


ADVANCED PRODUCT FINDER

    Don't see what you're looking for?

Editor's picks

  • 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)

    R-134a Can to R-12/R-22 service port connection
    End fits R12, 22, 502 fittings
    20" long hose
    Gauge has scale readings for R134, R12, & 22


  • 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 (184 reviews):
    (3.9/5)
    Grace Marketing- HI

    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

    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

    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
    Complete Diagnostic and Service Gauge Set for use on Air Condition Systems
    3 Color-Coded Hoses
    Easy to Read Gauges
    Quick-Connect Fittings with High Pressure Safety Valve
    Color-Coded Gauges, Valves and Hoses


  • Interdynamics

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

    Automotive Parts and Accessories (Interdynamics)

    Rating (244 reviews):
    (4.3/5)
    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

    Works as advertised on my 2005 Honda Accord

    Here's what I did:1) Started the car and cranked up the AC to full blast2) Located the LOW pressure AC valve in the engine compartment and attached EZ Chill hose with pressure gauge. The reading was in the low green section so already it was telling me that the PSI was low (needs to be in the blue area)3) I then attached the hose to the EZ Chill canister and pressed the button for about 10 seconds. At this point, you will see the needle jump up past the blue area, however this is normal. Once you release the button, the pressure will read the correct PSI4) I would repeat the process of pressing the button for 10 seconds, then checking the pressure and temperature of the air coming out of the events5) I stopped when the pressure on the gauge registered in the upper blue areaTIPS:Read the instructions! The manual does mention that the gauge is calibrated for an ambient temperature of about 80 degrees fahrenheit. Any cooler or... 5/5 KEspinosa (San Diego, CA United States) - See all my reviews This review is from: Interdynamics MAC-134 EZ Chill Refrigerant Refill with Charging Hose and Gauge - 18 oz. (Automotive) Here's what I did:1) Started the car and cranked up the AC to full blast2) Located the LOW pressure AC valve in the engine compartment and attached EZ Chill hose with pressure gauge. The reading was in the low green section so already it was telling me that the PSI was low (needs to be in the blue area)3) I then attached the hose to the EZ Chill canister and pressed the button for about 10 seconds. At this point, you will see the needle jump up past the blue area, however this is normal. Once you release the button, the pressure will read the correct PSI4) I would repeat the process of pressing the button for 10 seconds, then checking the pressure and temperature of the air coming out of the events5) I stopped when the pressure on the gauge registered in the upper blue areaTIPS:Read the instructions! The manual does mention that the gauge is calibrated for an ambient temperature of about 80 degrees fahrenheit. Any cooler or... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , June 22, 2014
    Self dispensing can has reusable recharge hose and in line pressure gauge
    Contains leak sealer to stop most common leaks in rubber hoses gaskets and O-rings
    Restores lost refrigerant and oil
    All in one solution
    Easy to read gauge


  • ARKSEN

    ARKSEN© 4-Valve Dual Gauge Diagnostic Freon A/C Manifold Tester + 4CFM 1/3HP Vacuum Pump

    Home Improvement (ARKSEN)

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

    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

    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
    Color coded hoses help identify the hoses for added convenience
    Free Air Displacement: 4 CFM; Power: 1/3 HP; Inlet Port: 1/4" Flare
    Operating Pressure: 800 PSI; Burst Pressure: 4000 PSI
    Quickly and effectively removes moisture and air arom air conditioning systems
    Compatibility: R404a, R410a, R22; Hose Length: 5 Feet


  • Seasky

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

    Automotive Parts and Accessories (Seasky)

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


  • ARKSEN

    ARKSEN© Deluxe Manifold Gauge A/C, 3CFM Vacuum Pump, 5ft HVAC Hoses

    Home Improvement (ARKSEN)

    Rating (27 reviews):
    (3.9/5)
    ARKSEN

    Set good, but requires work to use. Bad gaskets, good pump and gauge.

    PROS: Good inexpensive pump. Gauge works well. PRICECONS: Bad air hose gaskets. Celsius readings only - requires conversion by user to Fahrenheit.OVERALL: It is nice for the money, but requires work to use. I would buy it again if not able to find one with a F reading on the gauge for similar price.We bought this pump & gauge set ($99) to help diagnose our old motor home a/c. When my husband tried to hook up the hoses, he discovered the cheap plastic air hose gaskets had arrived broken and leaked terribly. They had to be replaced before using ($4). The gauge scale is in Celsius with no Fahrenheit scale. Since other equipment listed requirements in F, use required constant conversions.cheap plastic gaskets is hoses that leaked terribly and had to be replaced before use. The gauges showed the a/c would not hold pressure and he found the receiver/drier was the culprit. Went to Amazon for freon (dozen cans $57.75 and we used 3) and to the manufacturer... 3/5 J. Smith - See all my reviews Verified Purchase(What's this?) This review is from: ARKSEN© Deluxe Manifold Gauge A/C, 3CFM Vacuum Pump, 5ft HVAC Hoses PROS: Good inexpensive pump. Gauge works well. PRICECONS: Bad air hose gaskets. Celsius readings only - requires conversion by user to Fahrenheit.OVERALL: It is nice for the money, but requires work to use. I would buy it again if not able to find one with a F reading on the gauge for similar price.We bought this pump & gauge set ($99) to help diagnose our old motor home a/c. When my husband tried to hook up the hoses, he discovered the cheap plastic air hose gaskets had arrived broken and leaked terribly. They had to be replaced before using ($4). The gauge scale is in Celsius with no Fahrenheit scale. Since other equipment listed requirements in F, use required constant conversions.cheap plastic gaskets is hoses that leaked terribly and had to be replaced before use. The gauges showed the a/c would not hold pressure and he found the receiver/drier was the culprit. Went to Amazon for freon (dozen cans $57.75 and we used 3) and to the manufacturer... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , October 16, 2015

    Hoses are not low-loss type.

    4/5 Michael Pollock - See all my reviews Verified Purchase(What's this?) This review is from: ARKSEN© R134a R12 R22 R502 Manifold Gauge & 5CFM 1/2HP Vacuum Pump 5ft HVAC Kit Vacuum pump works great and is easy to use. However, the hoses for the manifold are not low-loss type. Help other customers find the most helpful reviews  Was this review helpful to you? , March 6, 2015

    Am very well pleased and they work great

    5/5 Lester Hebert (PRESCOTT VALLEY, AZ, US) - See all my reviews, March 31, 2016
    Motor Power: 1/3HP, 3 CFM, Pump Speed: 1720 RPM, Power Voltage: 110V, 60Hz
    Direct Drive Motor Allowing Easy Starting and is Maintenance Free, Micro Rating: 75 Microns (10pa)
    Heavy-duty Aluminum Alloy Casing
    Internal High Volume Cooling Fan for Extended Use
    3 CFM Single-Stage Rotary Vane Vacuum Pump 10Pa VACUUM package DEAL !


  • Generic

    R22 R12 R134a R502 A/c Diagnostic Service Manifold Gauges Set W/ 3 Color Hoses

    Furniture (Generic)

    Reading of R12 R22 R134a R502 Celcius Degree Complete Diagnostic And Service Gauge Set For
    W.p. 5ft Hoses (each Hose With 1/4 Fitting On Both End ) Complete Diagnostic And Service"
    R22 R12 R134A R502 A/C Diagnostic Service Manifold Gauges Set W/ 3 Color Hoses This Listing
    Use On Air Condition Systems 3 Color Freon Service Charging Hose 2500PSI Burst 500PSI Max
    Is A Brand New Ready To Ship Brand NEW! Features Include: Easy To Read Gauges. Has


  • R REIFENG

    R REIFENG A/C Refrigerant Manifold Gauge R22 R134A 60" Hose

    Automotive Parts and Accessories (R REIFENG)

    Rating (48 reviews):
    (3.4/5)
    R REIFENG

    Convinced

    I bought this item by mistake because I looked at different ones to compare them and ended up picking the wrong one. When I realized it I was in the checkout section almost done. I could have cancel the purchase and I really thought about it but said to my self wth. even thought I read a bad review let me try this one. Beside I wanted to use an Amazon gift card. Well, time to get to my point. The delivery was timely, the packiging was good, came with no instructions, although,you should not need them if your know what you are using it for, and most important is that this Gauge does not work period. Finally, I just recived some refrigerant, which I oredered from an Amazon seller and used this gauge to tried to top off an AC unit and did not do the job. I tried to take the system presure with same negative results. Then, I called a friend of my and asked him to bring his old but excelent Yellow Jacket Gauge and we were able to do the simple task in no time. I tried my gauge a second... 1/5 Pesimus - See all my reviews Verified Purchase(What's this?) This review is from: R REIFENG A/C Refrigerant Manifold Gauge R22 R134A 60" Hose I bought this item by mistake because I looked at different ones to compare them and ended up picking the wrong one. When I realized it I was in the checkout section almost done. I could have cancel the purchase and I really thought about it but said to my self wth. even thought I read a bad review let me try this one. Beside I wanted to use an Amazon gift card. Well, time to get to my point. The delivery was timely, the packiging was good, came with no instructions, although,you should not need them if your know what you are using it for, and most important is that this Gauge does not work period. Finally, I just recived some refrigerant, which I oredered from an Amazon seller and used this gauge to tried to top off an AC unit and did not do the job. I tried to take the system presure with same negative results. Then, I called a friend of my and asked him to bring his old but excelent Yellow Jacket Gauge and we were able to do the simple task in no time. I tried my gauge a second... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , September 11, 2011

    Don't have low-loss fitting or anti-blow back and don't seem to be working

    1/5 investordude (USA the greatest) - See all my reviews Verified Purchase(What's this?) This review is from: R REIFENG A/C Refrigerant Manifold Gauge R22 R134A 60" Hose I got these gauges to connect to me home central air to measure the pressure. I ran into problem when I found that these gauges did not come with low-loss fittings. So I had to buy low loss fittings for $26 from ebay. After I got everything I needed I tried them on. I have three central air conditioners. I first connected gauges to the one that has low gas and I got zero reading on both gauges. So I tried it on working unit and still got zero reading. I may be doing something wrong but looks like gauges are not working. I will update after I try other set of gauges but until then I can only give these gauges one star, I would have given them less than one since they have not worked for me. Help other customers find the most helpful reviews  Was this review helpful to you? , July 31, 2011

    pure garbage

    1/5 jazz6339 - See all my reviews Verified Purchase(What's this?) This review is from: R REIFENG A/C Refrigerant Manifold Gauge R22 R134A 60" Hose they leaked right out the box just to test them before i used them i connected them to my vacuum pump and pulled a quick vacuum tun the pup off before i could even look at them the pressure was back up to zero i even went so far trying to salvage them by putting teflon tape on all the connections still leaked what a piece of crap and amazon you are getting a bad rap for selling these cheap china made gages to the public. If i could rate them a minus number i would. Help other customers find the most helpful reviews  Was this review helpful to you? , May 20, 2012
    Complete Diagnostic and Service Gauge Set for use on Air Conditioning Systems (Automotive / Home)
    536G gauge of household air-conditioning automotive air conditioning fluoridation
    Comes with easy to hang hook to keep it where you want it
    Comes with 60" yellow, blue and red hose
    Temperature Scale: Celsius


  • Mastercool

    R1234yf gauge set

    Home Improvement (Mastercool)

    Rating (1 reviews):
    (3.0/5)
    Mastercool

    Three Stars

    3/5 tao lu - See all my reviews Verified Purchase(What's this?) This review is from: R1234yf gauge set (Automotive) work just fine Help other customers find the most helpful reviews  Was this review helpful to you? , November 12, 2014


  • Robinair

    Robinair (RG3) Portable Refrigerant Recovery Machine

    Automotive Parts and Accessories (Robinair)

    High pressure safety shut-off switch, the RG3 automatically shuts off machine if pressure rises above 550 PSI
    High efficiency cross flow design, the RG3 layout of fan and condenser is maximized for shorter cycle times
    Handles almost all refrigerants, the RG3 works with all common CFC, HFC, HCFC refrigerants including R-410A
    Oil-less compressor that is capable of recovering both liquid and vapor
    Compact and lightweight, the RG3 features a 40 percent smaller footprint, is easy to carry and weighs in at 18 pounds


Gauges