A/c term paper

HOOF-iffy has the acceptable stability and the compatibility properties with HOFF-abdominal aortic aneurysm. It is also mildly flammable entirely non as flammable as previous refrigerant. This is why compeverys such(prenominal) as Volkswagen who has refused to use the new refrigerant. This new product also has a depression toxicity level. Comparing the two refrigerants of HOFF-AAA and HOOF-iffy the AAA is a hydro fluorocarbon magic spell the iffy is a hydrofluoric-olefin refrigerant. HOFF refrigerants ar turn in one single reverberate while the HOOF refrigerant is bonded with at least one range bond between the carbon atoms.HOOF-iffy has the same physical properties as HOFF-AAA hence iffy may be used in current AAA systems without making many modifications to the system. According to DuPont iffy has the po hug drugtial to be retrofitted to the animate HOFF-AAA systems. The only problem with this that it can cause is that HOOF-iffy is said to be tens quantify to a greate r extent expensive whence the existing HOFF-AAA which then brings the idea of shops recharging the system with HOOF-iffy but actually refilling it with the cheaper HOFF-AAA since they pass on be so similar. Studies have proved that HOOF-iffy has improved performance beating the HOFF-AAA.HOOF-iffy depart have a lower total contribution to climate tilt. It has a more environmentally sustainable refrigerant for automobiles that has a 99. 7% better GAP give than the currently used refrigerants, examine have also proved that it bequeath lead to better fuel efficiency. Thus also leading it to be more efficient in warmer climates rather than using CO. implementation Test First begin doing your test with selecting your temperature knob to cold then your selector to Max LLC. This will forthwith recalculate the cabin nervous strain without letting out stead job thus publicationing in colder temperature.Then turn blower switch to full blast. Now start engine, put pressure on gas p etal until reaching two thousand RPM. Now score sure to close all windows and doors. The next step would be to conduct an auxiliary fan in front of the car facing the condenser. go out the system to stabilize which will take approximately five to ten minutes. Now begin to place a thermometer in the register crush to the evaporator and keep the temperature. When you demonstrate the temperature it should be around thirty-five to forty degrees Fahrenheit(postnominal) with an ambient air temperature of eighty degrees Fahrenheit.At this time if you have a isthmus of gauges, this would be a good time to put them on to say your pressures and examine when the impresser is cycle or cycling at all in some cases. If outlet temperature is gamey, check compressor cycling time. After this process now first check the cycling clutch switch operation. Second and last(a) step for this process, is if clutch is energize continuously, discharge the system and check for scatty orifice tube, p lugged inlet blanket, or any other restrictions in the suction line. Diagnosis using Manifold Gauge Test 1 . ) Low position should get hold of 30 SSI and high side should contemplate 200 SSI.This is considered a normal pressurized system. 2. ) Low side reads 12 SSI and high side reads Pepsi. When the gauges read this, this will cause the clutch to cycle more often thus resulting in the clutch having to be bypassed to be diagnosed. Your diagnosing should conclude with a thinkable partial restriction in the metering device, screen clogged, or moisture in the system or a practical kinked hose on the low pressure side. You should visually inspect to guess if there faulty blower or a faulty cycling switch. Also check to curb if the evaporator so dirty or the try and to see if it is iced. . ) Low side will read very low around Pepsi. High side will read normal at first but then drop. Your diagnosis will conclude that you ar low on refrigerant. First perform a evasion test to se e if that is why your refrigerant is so low. Then check and see if there is a total restriction on the low side. another(prenominal) possibility is the TXT being stuck closed. If so warm the sensing bulb and check pressure, sensing bulb may have lost its charge. 4. ) Low side will read low. High side will read high. This will mean there is restriction in the discharge line. 5. ) Low side will read high or equalized.High side will read low or equalized. If equalized check hand valves to make sure they are open all the way. Possible electrical problem with the clutch not engaging. Also check fuses, clutch coil, wires, relay, switches, and compressor to see if there are any defects. Check to see if the clutch is engaged, valves are open and rings, belt, bearings and seal are in good going condition. 6. ) Low side will read high. High side will read normal. In this case the TXT will be stuck open. Sensing bulb may not be insulated or loose. Also could have a flooded evaporator. 7. ) Lo w side will read high. High side will read high.This will result in a overcharged system or air contamination. Also a oil overcharge or dyestuff overcharge. Also check to see if the condenser is blocked. Check for dirt, plastic bags, bent fins. Could deprivation to be cleaned and replace broken fans if need be. Now check the electrical side such as the fans, clutch, and check to see if the engine is over grooveing because of poor air flow. Suggests that could be caused from the timing being off or contaminated refrigerant. safety valve Detection To first do leak detection you will need to get your system to at least Pepsi for a minimum. Second you mustiness I. D your refrigerant.One detection method is a Halide torch. This will only work on Cuffs and Hoochs. You will need propane and a search hose. Next heat your reactor plate until it is red hot. The color of the flame will change once it finds a leak depending on the size of the leak. The second method of doing leak detection is the Soap Solution. Use a premixed soup source mixed with water then spray on Joints and suspected areas of possible leaks, now look for leaks. A third method is the fluorescent dye. strickle dye and inject into system while it Is in vacuum. Let the dye cycle through the system for three to four days then bring back in to check for leaks.This method does not ruin the systems performance, once back not the shop check system for leaks with a black light. The dye comes in two colors which are yellow-bellied and red. The drawback of using this method is the dye stains and will never come out. The after part method of leak detection is using an electronic leak detector. A new and old type of these systems. The older year detects the chlorine in R-12 and the newer models can detect both. They are self-calibrating and can self I. D leak rates as low as . Jazz per year. Once you expose a beep thats when it has found a leak. You never want to hand the leak detector to the refrigera nt.