here we are Talking about r32 vs r290.
Daikin R-32 Refrigerant
Daikin Just wants to say a few words. The air conditioner is the best choice for you. Did you know our world is getting hotter and hotter? Does it relate to the air conditioner? In the past, air conditioners use CFC and HCFC type refrigerants. Which is have high ozone depletion potentials and global warming potentials. Later R-410a HFC refrigerant was adopted as a replacement. Because it has zero ozone depletion potentials. But still significantly contributes to global warming. Does it perfect? If we could reduce more global warming ? of course now Daikin in the air conditioning innovation leader has brought our R-32.
The next-generation refrigerant. That does completely deplete the ozone layer with lowe global warming potentials. Residential air conditioning for the first time ever. Wonder why it has to be our R-32. Because our R-32 has ozone depletion potential of zero. That means it absolutely does not harm the ozone layer. And its global warming potentials is only 675.
Furthermore, it’s required minimum refrigerant volume to operate and can be easily refilled with no need for flushing. It is truly environmentally friendly. Since 2013, Dykin has cooperated with the major manufacturer of air conditioners in Japan to adopt R-32 as the commonly used refrigerant. We can see that most air conditioners in Japan are using R-32 refrigerant. the popularity of our third field also expands in Europe and Australia.
From now on we will widely see our R-32 air conditioner worldwide. With Daikin as the innovation leader of health and environment consciousness for your good health for your loved ones and to protect our environment. Let’s use R-32.
Table of Contents
R-290 Service Training – Part 1 (r32 vs r290. )
The goal of this post is to show you safely and correctly how to make a repair on any cabinet produced with our R-290 refrigerant. The first thing to consider is how do I identify the cabinet. I’m working on uses is R-290 refrigerant. all our R-290 equipment is required to have special labeling. throughout the cabinet beside the serial tag label. you will see several labels on the cabinet interior and the back of the cabinet. additionally the condensing will also have several labels on it.
it is also required that all our R-290 equipment have red sleeves over the refrigerant line process tubes. for any reason, you receive a replacement the part that is not exactly the same as the part you are replacing. stop and call professionals before continuing.
all the fan motors have a sealed shaft. all the relay and temperature controls have sealed. contacts the wire connectors that we use require a certain amount of force to pull the wires out of the connectors. which eliminates any spark potential wire nuts and crimp type connectors do not meet this requirement. therefore they should never be used in any of our R-290 cabinets. (r32 vs r290.)
for all refrigeration repairs, you’re still required to file good refrigeration. practices standard refrigeration tools will still be required. including oxygen-free dry nitrogen a micron gauge and shut off file. for your charging hose in addition to these tools, you should also use as short of refrigerant hoses as possible as well. as a pinch-off tool now let’s focus on the additional.
specialized tools that would be required. for our R-290 service, you will need a combustible gas leak detector. the safety placard uses only our R-290 refrigerant if you’re using the 1 pound cylinder supplied by true you will also need to use the specialized charging valve.
R-290 Service Training – Part 2
These are the only specialized tools needed to service an R-290 system true offers these parts individually or as part of several types of our R-290 repair kits please contact crews parts department for pricing and availability the following procedure should be filed when doing any type of refrigeration repair true requires the following good refrigeration practices these practices should include but are not limited to not leaving the refrigeration system.
open to the atmosphere for more than 15 minutes always change the dryer whenever. the refrigeration system has been opened. use a micron gauge and pull a vacuum to a minimum of 500 microns the introduction to the refrigeration system. of anything other than a flushing agent nitrogen are to 90 or refrigerant oil is prohibited.
all refrigeration repairs should be made in a well-ventilated area. the repair we are going to show is replacing a condensing unit on an R-290. a system that was previously diagnosed with a locked-up compressor. our R-290 repair starts with the service technician. turning on his combustible gas leak detector and leaving it on throughout the unit repair. (r32 vs r290.)
when you turn on the combustible gas leak detector it will have to self calibrate this will take about a minute. once the high-pitched beeping levels off, you can continue. do not proceed with the repair into the meter levels off put your safety glasses.
The technician should then display the safety placard in the area. he will be making the repair in disconnect the unit. you’re repairing from any power source. the service technician will then need to install temporarily.
R-290 Service Training – Part 3
piercing valves to allow access to the refrigeration system. to do this, you may need to trim a portion of the required. red identifying sleeves back and place the temporary valves. as close to the crimp at the end of the process tube as possible. the combustible gas leak detector may go off during this process. once the high-pitched beeping levels off. you can proceed after the temporary vows have been placed on the suction. and dis the technician will have to install his manifold gauge.
set with as short of hoses as possible on each of the temporary valves. once again the combustible gas leak detector may briefly. go off wait for your meter to level off then proceed. with the repair to remove the refrigerant from the system. you can open up both the high and low side lines and release the refrigerant slowly into the atmosphere. doing this will more than likely set the combustible gas meter off. you should immediately shut off both valves on your manifold and allow any released our R-290 refrigerant to dissipate in the atmosphere.
once a combustible gas meter levels off you can continue to release our tune any refrigerant. repeating this process until all the refrigerant has been released. from the refrigeration system once the refrigerant is out of the system. the technician must use a tubing cutter to cut out any failed refrigeration component. the reason for this is to prevent any possible spread of contamination and for the overall safety factor. for this example. the technician will cut the compressor pull out right where it braises into the compressor. he would then cut the liquid line as it exits the dryer. if the technician is replacing the compressor he will cut the compressor discharge line right as it exits.
R-290 Service Training – Part 4
the compressor instead of the liquid line as it exists. the dryer once the condensing unit has been removed. you will set the new condensing unit into place before pulling the plugs out of the compressor ports. be sure all of your refrigeration lines have been cleaned pre-fitted and are ready to be installed. this will minimize the amount of time. the refrigeration system is open which reduces the potential. for any moisture to be absorbed into the compressor oil.
when brazing on an R-290 system, you must always purge oxygen free dry nitrogen. through the system for a minimum of two minutes before and during brazing we recommend you set the nitrogen regulator between 3 to 5 psi, G. start to purge the nitrogen through the high side process tube allowing it to exit out the suction process tomb. you can now start to braise all the joints. once all brazing is done and the solder joints have cooled. pressurize the system with no more than 200 psi G of oxygen free dry nitrogen to leak check.
once we know that there are no leaks you’re ready to evacuate the refrigeration system. release the nitrogen charge down to about two pounds of nitrogen pressure. to ensure that no outside air is being drawn into the refrigeration system. connect your charge hose to your micron gauge that should have already been connected to your vacuum pump. ( r32 vs r290. )
start pulling a vacuum as soon as possible to help remove any moisture from the system. continue to pull a vacuum until you reach a minimum of 500 microns. once you reach 500 microns you will want to close off the shutoff valve on the charging hose, as well as the high and low sidelines.
R-290 Service Training – Part 5
on your manifold gauges, remove the charging hose going to your micron gauge. place the adapter a valve on the one-pound AR R-290 cylinder. be sure to leave the are R-290 cylinders in its box.
then attach a charging hose to our R-290 adapter valve. place the cylinder in the Box on its side on the charging scale. open up the tank valve then bleed the charging hose. we recommend placing something heavy on top of your charging hose. so that if the hose gets pulled. it will not affect the scale zero out the scale. open up the shuttle five on the charging hose. are R-290 can be added as a liquid or a vapor. open up the high side valve into the desired charge has been weighed in then close the valve. if the system didn’t take its full charge, close the high side valve and start the compressor and allow it to run for a minute. then slowly open the low side valve until fully charged. ( r32 vs r290. )
once the system is fully charged close the adapter valve on the R-290 cylinder. as well as the shutoff valve on the charging hose. allow the unit to run to verify operation. it is now time to remove both your hoses and temporary access valves. true requires the removal of any excess files on any refrigeration system.
the next step would be to remove the refrigerant that is trapped in the high side hose to assure that we have a proper charge in the unit. to do this pinch off the high side process tube in front of the access port.
R-290 Service Training – Part 6
next, you want to open up the high side valve then slowly open the low side manifold valve to draw all the refrigerant out of the high side hose. once the pressures have equalized you can close the high and low side manifolds. using a tubing cutter cut the high side process line in front of the temporary access valve and behind the pinch-off tool.
this could cause the combustible leak detector to go off. wait for the combustible gas leak detector to level off before moving on. be sure to crimp the end of the copper tube down. so that it will make it easier to weld test the end of the line with the bubble to make sure it’s not leaking. once a combustible gas leak detector levels off you’re ready to braise the end of the process tubes shot.
once the process tube cools down remove the pinch-off the tool and thoroughly leak check with soap bubbles. now you can repeat these steps for the low-side process tube. once the final repair is completed if the red identifying process tube sleeves have been removed. they must be reinstalled once the process tubes have cooled down.that’s it. (r32 vs r290. )