In this HVAC Training Video I go over the Basic Refrigeration Cycle of a Walk-In Box Refrigeration System along with the Operation. I Explain the Refrigerant States, Superheat, Subcooling, Pressure and Temperature along with Component Identification and Functions of Each Part.

Supervision is needed by a licensed HVAC Tech while doing this as Experience and Apprenticeship garners Wisdom and Safety.

Support and More Content- Patreon.com/acservicetech

These Videos are all part of our Training Series on HVACR Service, Installation, Preventative Maintenance, General Knowledge, and Tips. Please comment and ask for videos that you would like to see in the future! We come out with new videos every few days from my job sites, service calls, and the training shop! I hope you enjoy and find them very beneficial! See you next time at ACSERVICETECH Channel!

All of the ACSERVICETECH Playlists-

ACSERVICETECH is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.
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Here is a link to the Digital Refrigerant Scale used in the video

Here is the Link for the Yellow Jacket Refrigerant Manifold Gauge Set used in the videos

Here is a link to Refrigerant hoses with valves used in the videos

Here is a link to the Appion core removal and vacuum tool-

Here is the link for the Imperial Kwik Charge 535-C-

Here is the link to the Fieldpiece SDMN6 Dual Pressure Testing Manometer with Pump-

Here is a link to the UEI DL389 Multimeter used in the videos-

Here is the Link for the 4 Port Yellow Jacket Brute Manifold Gauges and hoses-

Here is the link to the Appion Valve Core Removal Tool-

Here is the link to the Fieldpiece ST4 Dual Temp Meter-

Here is the Link to the Fieldpiece MR45 Recovery Machine-

Here is the Link to the Appion Red 3/8″ to 1/4″ Vacuum Hose-

Here is the link to the Yellow Jacket 1/4″ by 1/4″ heavy duty hose straight-

Here is the link to the CPS Vacuum Micron Gauge-

Here is a link for RectorSeal Bubble Gas Leak Detector

Here is a link to a Dual Readout Temperature Meter with two k type temp sensors-

Here is a link to the Air Acetylene Torch setup-

Here is a link the Nitrogen Regulator

Here is a link to the Nitrogen Flow Meter

Here is a link for the Supco Magnet Jumpers

Here is a link to the JB 6 CFM Vacuum Pump

Here is a link to 1 gallon of JB Vacuum Pump Oil

Here is a link to the Supco Vacuum Micron Gauge

Here is a link to the 1/4″ by 1/4″ female coupler from Supco –

Here is a link to the General Tools digital Psychrometer

Here is a link to the Amprobe Digital Psychrometer

Here is a link to the Fieldpiece SDP2 Digital Psychrometer-

Here is the link for the Ratcheting Service Wrench

Here is a link to the Appion G5 Twin Recovery Pump

Here is a link to the Malco Sheet metal scribe-

Here is a link to the Wiss Right Tin Snips-

Here is a link to the Wiss Bulldog snips-

Here is the link for the Malco 3″ Blade Combination Snips-

Here is a link to the Wiss 12″ Folding Tool/Breaker Bar-

Here is a link to the Wiss 18″ Folding Tool/Breaker Bar-

Here is a link to the Wiss 24″ Folding Tool/Breaker Bar-

Here is a link to the Wiss Hand Seamers-

Here is a link to the Titanium Step Drill Bit-

Here is a link to the 1/8″ and 3/16″ Rivet Gun-

Here is the link for the Irwin Wire Stripper/Cutter/Crimper

Here is the link to the Stanley 6 in 1 Screwdriver

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ACSERVICETECH

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43 thoughts on “HVACR Refrigeration Cycle Training! Superheat and Subcooling!

  1. AC Service Tech LLC says:

    Tool List- https://www.amazon.com/shop/acservicetech
    Support- https://www.patreon.com/acservicetech
    For those that are looking for the tools used in the videos: (Linked Below)

    Here is a link to the Digital Refrigerant Scale used in the video
    http://amzn.to/2b9oXYl

    Here is a link to Refrigerant hoses with valves used in the videos http://amzn.to/2aBumVI

    Here is the Link for the Yellow Jacket Refrigerant Manifold Gauge Set used in the videos http://amzn.to/2aenwTq

    Here is a link to the Hilmor 4 port Aluminum Manifold Gauge Set-
    http://amzn.to/2m4QLik

    Here is a link to a Dual Readout Temperature Meter with two k type temp sensors- http://amzn.to/2sQffyB

    Here is a link to the Appion core removal and vacuum tool- http://amzn.to/2t5ogIb

    Here is a link for RectorSeal Bubble Gas Leak Detector http://amzn.to/2ckWACn

    Other tool links can be found in the video description section.

    ACSERVICETECH is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Any purchase made through Amazon even if it is not the item in the link that you clicked through to start would count.

  2. Avery Mortland says:

    hey acervicetech, I'm 18 years old and been watching HVAC related videos. I think I want to become an HVAC technician but just simply don't know where to start. could you tell me kind of a starting point to began with? thanks

  3. Blade says:

    What makes a walk in box so much colder than your average house? It must be that its really well insulated?
    And how does a freezer reach freezing temps? I'm sure it works on basically the same principal as AC but what makes a freezer different?

  4. J. Bian says:

    I'm in a trade school learning HVAC. My instructor explained it as well as you do about super heat and subcooling. But I want to come to your channel and watch every video so I can learn more. Today I learned why the liquid receiver is so crucial to the efficiency of the system. Thank you!

  5. Jason Bouchard says:

    Where abouts do you check the superheat and subcooling on a cooler? Also what are normal pressures and tempertures of a cooler using nu22.? I dont usually do cooler work but had to go to one call and the high side was about 225psi and low side was about 50 psi.

  6. Mr.RightNow says:

    I appreciate your videos I'm actually going to school for HVAC right now and your videos or better explain then some of my instructors I wish you had a picture video explaining heat pumps and how the reverse valve works I will greatly appreciate it and I guarantee you other students will as well…

  7. Drew says:

    Outstanding video. I’ve been working as a frame to finish carpenter for the past 15 years. This summer, I’m working for my buddies HVAC company. He’s got tons of work and is a little short staffed. I started doing some basic research on the refrigeration cycle and immediately realized how little I actually knew about the process. This video helped a lot. Can you recommend any good books that can help further explain the process? Thanks again for the awesome video. I subscribed to your channel.

  8. Melvin292 says:

    Excellent video. You should also follow up with a video on line set sizing for such a walk in. Why size is critical to keep velocity up for returning oil and so on. Also, you may want to explain a suction side accumulators on a walk in and it's importance.

    Great great video!

  9. Jeff AlwaysDry says:

    My friend said his walk in cooler only iced up in hot days? Any ideas what’s wrong with it? We are in Louisiana, hot days means the ambient temperature is over 90 F. Thank you so much

  10. Yavan Baza says:

    First of all thanks for sharing your knowledge!!
    I have a question regarding subcooling. You said that most walk ins should have a superheat of about 6-8 degrees. Is there a recommendation on subcooling? Should I get my temperature reading right after the condenser? or past the liquid receiver?

    I generally charge all systems by weight but have never seen that on walk in systems.
    what will be the proper way to not overcharge a system?? as you mentioned; this will limit your space in your condenser.

    thanks in advance!

  11. Arbuscula33 says:

    I'm having trouble understanding the dynamics of liquid refrigerant moving around in the system due to varying conditions, both inside and out. In this example during low inside load conditions, the tx will close and back up liquid into the receiver, correct? I'm assuming fan cycling for outdoor control. In another example with head master, in low out door conditions head master will close condenser and we will have low refrigerant levels in receiver but then in summer time that extra refrigerant will be in the receiver(will be 80 percent full). I just don't understand these dynamics and how they change with different systems, conditions. Complicated.

  12. Nick Geraci says:

    Thank you for the video. I’m currently in class at nights preparing to take my NYC Refrigeration Machine Operator test. Any videos on the refrigeration cycle, heat, pressure, charles law, tevs, types of compressors, service valves or anything else refrigeration definitely help.

  13. Stevei Stevei says:

    hi, Thanks for your clear explanation of Refrigeration Cycle. I have one rather important question I would like to ask. Your Airflow where does the Air come from. Is it normally a Close Loop System where the Air is constantly re-circulated by the Evaporator Fan in the Fridge, or is Fresh Air Intake going on so that the Evaporator Fan is constantly pulling Fresh Air from the Outside and blowing it through the Evaporator Coils inside the Fridge. Also if it is not a close Loop System and the Fresh Air is constantly being sucked in from outside , is it vented out as it is recirculated inside and replaced by a fresh stream of air. Thanks

  14. Carson Glass says:

    It all depends on what type of evaporator it is, if a center mount, AT the Evap..should be 4 to 5 degrees superheat,,At the compressor, scroll type 10 to 15, hermetic comp..20 to 35 per HEATCRAFT….

  15. Superwingman69 says:

    Great video and explanation. I was hoping you would have explained in greater detail how the pump down function works utilizing the liquid line solenoid valve. Thank you for your time and effort.

  16. Takka Chipendo says:

    ||I disagree my brother when you said you can not put a DISTRIBUTOR on a cooler box. Yes you can Connect DISTRIBUTOR. It depends with type of EVAPORATOR you have on your Box, for instance if you've Multi-pass EVAPORATOR coils you would use a DISTRIBUTOR & EXTERNAL TXV..

    -Remember when a DISTRIBUTOR is fitted to the EVAPORATOR, an Externally Equalised T.E.V must be used.

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