The ARPA Zone/Open Membership Discussion Forums. My silicone mold got moldy. I hope you guys can explain this situation to me. Would a replacement condenser capacitor of differing specs reduce cooling? And you only added 18oz of charge. When I first added the refrigerant the ambient temp was around 66F. JLC subscribers have access to the July/August 2022 print edition at this time. About half? Can't explain the entire system of a mini split in a comment but when it comes to the charge you can't just add refrigerant to get a certain pressure and the pressures you are reading may not make sense if you are unaware of the systems current operating capacity since its an inverter system and the pressures can be all over the place as the system is communicating and that eev and compressor are ramping up and down. Is it 120 V or 240 V? A normally operating R-410A system with the same condensing temperature of 120 degrees and a 45 degree evaporator saturation temperature will have a high side pressure of 418 psig and a low side pressure of 130 psig. Some of my customers like their rooms to be +80. That's what they want so we have no choice but to provide. this is a 1.5 ton condenser, 2 ton evaporator, and a 0.051 inch orifice. Thanksand yeah I am finding that there is no such thing as a thermostat that will perform compressor lock-out based on HIGH outside ambient temp. When you first added refrigerant what was the ambiant temp and room temp. I recovered the charge and weighed it. The best answers are voted up and rise to the top, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company. Recovering R-22 refrigerant from a system with locked compressor, Newly installed heat pump system - Air Handler condensate leaking out of ceiling. Is it possible to return a rental car in a different country? Put it in test mode wich is highest output and check pressures and sh SC. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Like I said the condenser section is located in a parkade and it has been mighty cold lately so I can see the ambient temp. it is running at 285/120 psig. You will not have liquid and vapor in the system. Pull the existing charge and weigh in the proper charge of factory charge plus what ever additional ounces are needed for lineset length above what the factory charge covers. A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Press J to jump to the feed. For air conditioning system, R22 pressure in discharge is250psi and suction in67psi. I live in southern manitoba, and the unit I am working on is a Kool King m/n MOF 22CDN1-MN10W. Ragsdale releases pure nitrogen (N2) into the line set, watching the gauge to monitor the pressure. Everything is reversed, your suction line will be hot. I am glad that occured since I felt something was off and didn't want to charge a possibly leaky system. The pressure-testing adapter fitting has its own valve for opening and closing the system during the tests. Thanks for the dialog, guys. Is the evaporator unit putting out cool air? buy this book and give it a read, it can help a lot with simple things, its very well written and easy to understand / look up issues in. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Explain Certbot's HTTPS redirect configuration. In the meantime, you may browse the digital edition. This fitting on the testing adapter allows the installer to attach a sensitive pressure gauge without using hoses that might affect the measurements. Now I can get to my rambling question(s). Is this a mini-split ductless a/c unit? This makes sense to me as the refrigerant has entered a low pressure environment and boiled off into a vapour, dropping in pressure from what it would be at ambient temperature/pressure (approximately 200 psig@70F). Mom is elderly and is always "cold". as you knew the old charge you will know instantly if there is a leak. A subreddit for Heating, Ventilation, & Air Conditioning technicians - please visit r/hvacadvice to ask general questions, and r/thermostats for thermostat issues! If you Google "operating pressures for R-410a" you will get 420 psi for the high side, assuming the air coming off the condenser is 120 F. What it the temp of the air coming off yours? Charge by SC. Announcing the Stacks Editor Beta release! Helping You to Do It Yourself! The first thing to realize is that when a system is off and equalized, the systems pressures on both the high side and the low-pressure side will match. What was the outside temperature when you measured the pressures? Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. 230 volt, in the attic ducted evaporator. Is there a name for this fallacy when someone says something is good by only pointing out the good things? Connect and share knowledge within a single location that is structured and easy to search. What is the gravitational force acting on a massless body? For a better experience, please enable JavaScript in your browser before proceeding. I hooked up my gauges to the system and saw a standing pressure of 140psig, which corresponds with about 48F. Copyright 2022 Zonda Media, a Delaware corporation. Calculating length of curve based on data points? If your worried. The real confusion here is how you guys managed to take 4 trips and months of time to complete a simple flare repair. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions. How Can Cooked Meat Still Have Protein Value? is the French certificate of renewal of CNI enough to prove my identity in Switzerland. this will let you know very quickly what the charge is. 10 psi of vapor pressure change with temp fluctuations; even with nitrogen. After the triple-evacuation process is complete, Ragsdale opens a valve on the compressor unit and releases its stored refrigerant into the cleaned and evacuated line set. Making statements based on opinion; back them up with references or personal experience. But for R410A pressure will be more higher that R22. ReVision Energy technician Dave Ragsdale on site with a newly installed Mitsubishi mini-split system on an older home in rural Maine. ReVision Energy tech Dave Ragsdale explains how to make sure a new Mitsubishi mini-split heat pump is fit for service. See http://www.arkema.com/export/shared/.content/media/downloads/products-documentations/fluorochemicals/Forane-410A-Pressure-temperature-chart.pdf. Anything like that would have an outdoor temp sensor. It only takes a minute to sign up. Others have mentioned. Is your evaporator unit/circulating fan producing the expected flow of chilled air? Is TXV required when an appropriate piston/orifice is used? Tested, cleaned, and charged with refrigerant, the fully commissioned mini-split is now in service and ready to begin heating the home. The day after the pressure test, Ragsdale returns to conduct a triple-evacuation line-set purge in cold, rainy conditions. i just installed a new split unit r-410a a/c system. Is "wait" an exclamation in this context? Today I was tasked with fully charging the unit and running it. your pt chart shows you the saturated conditions when liquid and vapor are in the system and at a balance for the temperature, ( this is why a pt chart doesnt work for superheat or subcooling but allows your to find both.) There is of course the possibility that your system is not operating optimally and so not pumping enough heat to produce the proper condenser temperature. System pressure went from a deep vacuum to 105 psig when refrigerant was added. If you continue to use this site we will assume that you are happy with it. Post photos, respond to polls and access other special features. About a leak. He will pressurize the line set to about 150 PSI more than its usual operating pressure and leave it under pressure overnight. Ragsdale attaches an adapter to the service port that will allow him to pressurize and evacuate the line set directly. the high side seems way low, should be about 420. the correct orifice is installed. hi, anyone familar with R410A. With the vacuum pump running, nitrogen pressure in the line set starts out at about 11,000 microns, but quickly drops. 1)Would the amount of refrigerant added not be enough to cause a high static pressure? Might also mean they have a large amount of shading, so they get little solar heat during the shortened daylight hours. He will pressure-test and vacuum-flush the lines through this port. Ragsdale removes the "core" from the service port of the mini-split's refrigerant line fitting. Methods for Properly Charging an R410A System. Which even .4 is more then acceptable for a family of 3 in a 1,000 sq ft home. This unit is used for cooling in a telecommunications room, in which the evap is located. RULES for AOP - Owner Assistance and Contractors, Energy Efficiency and Building Performance Discussion NEW, Carnak Zone/Locked Areas - For Professional Member Only, How To Become a Pro and Rules For Pro Members, Pro Forum: Refrigerants and EPA regulations **NEW, Pro Forum: Residential Refrigeration and Appliances **NEW, Pro Forum: Equipment Recalls and Bulletins **NEW, Pro's Forum: Building Science Discussions, Educational Forums - Open for all in the industry, Welcome to HVAC-Talk's Educational Forums, How to Submit Links, Articles and Quiz Questions, Frequently Asked Questions About Submissions, Physics, Thermodynamics, Fluid Flow and Combustion, Educational, Training & Reference Information, Manufacturer's Technical Information Links, Electrical Theory, Circuits and Electronics, HVACR Equipment, Components & Accessories, Accessories Humidifiers, Air Cleaners, HRUs, Fans, Filters, etc. I fully charged the system to factory specs (and double checked that my lineset wasn't longer than the default length it comes with) and it ran normally. I would think that it should absorb some heat from the surrounding air and rise in pressure. The Fora platform includes forum software by XenForo, http://www.prospex.us/DOCS/HVAC/OEHHM.pdf, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. So if only had vapour in the system due to a low charge it would seem "off" if I was using a PT chart for 410A as a reference for what pressure should be a whatever ambient temperate there is. Pull it weigh it and see. So what pressure is normal for air-conditioning systems. Some units have the valve relocated at another spot. The system was evacuated to 500 microns and only 18oz was added. So your PT chart is meaningless. She is sharp though, so if I tell here "Only use emergency heat if outside is over 65 deg" -- she will. Window units used to use chilled condensed water from the evaporator to help cool the condenser coils and presumably this would greatly reduce high side pressure. If the house needs heat even starting a 65, it has no insulation and is leaking like a sieve. Which book should I choose to get into the Lisp World? But for R410A pressure will be more higher that R22. Can I clean it or should I throw it away? Then charge according the chart inside cover in heat mode. Should I have the return line replaced when installing a new heat pump? How do you get more DNA points in Plague Inc? We got pulled away to do something else so I did not end up charging it. Can't find a manual for this anywhere.

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410a mini split operating pressures