91. Aircon Comparison Aug 2011 newsletter.
Contents
1. We also supply other models of High quality Ecotechnics Air conditioning machines details can be found on our website www aecs net Standard Features Weight scales Recovery compressor Vacuum pump On board storage bottle Build in manifold with automatic solenoid valves Oil separation injection Charge quantity database Automatic flushing software USB Port for updating Serviced on your premises PLUS AECS technical support viv v v v YV vV YV v vV Ph 64 6 874 9077 www aecs net This air needs to be removed as else the pressure in the tank will keep rising stopping the compressor from pushing refrigerant into the tank damaging the com pressor The Italian machine compares the bottle pressure with the bottle temperature and decides based on that logic if air is present in the storage tank The control unit in the machine will sound a warning and will open auto matically a solenoid valve to vent the air This venting is called purging The Chinese machine does not have any provision to purge the tank There is no connection on the bottle for a purge valve This leads me to conclude that any air in the bottle will eventually be charged back into a car but we have not tested this ltalian Low cost Chinese No purge line Storage tank Storage tank The storage tank has a purge connection The purge line is connected to the valve body for automatic purging No purge connection on the bott2. Also the difference in overall engineering quality and precision adds to the equation AECS has decided NOT to market this particular high spec ed low cost Chinese brand even though it has an attractive price and exterior Any garage or aircon service shop who wishes to in vest in a recover recycle machine needs to consider all aspects of that purchase including training and back up For AECS Ltd H P Leijen trainer research E Mail hpleijen aecs net Herbert AECS TRAINING AED Automotive Electronic Diagnostics 13th amp 14th September 2011 NELSON 1st amp 2nd November 2011 AUCKLAND gt SCAN 1 1 Scan tool Diagnostics 16th amp 17th September 2011 GREYMOUTH 19 amp 20th September 2011 CHRISTCHURCH gt ECAC1 1 Air conditioning 1 1 21st amp 22nd September 2011 CHRISTCHURCH gt EMS1 4 Hybrid Engine Management 3rd amp 4th November 2011 AUCKLAND Courses that are current with today s Ring us today to enrol Technology Ph 64 6 874 9077 Further course information on our website www aecs net We are sending out a training plan survey in the next few weeks to you This is your chance to get the training you want in your area as it will help us to plan 2012 training calendar The survey will be emailed to you including a special offer for selected training semi nars
3. connectors in its own carry case Touch screen amp Colour pictures Greatly improved start up speed Easy to install 24 month web upgrades at anytime Backed up with AECS technical support A greater coverage than most other tools www aecs net would like you to know that in all the following pictures we have made sure the logos and part num bers are not visible to protect the company as the same machine is advertised in NZ with different col ours We prepared a comparison report to be sure that the machine would do what is needed in NZ workshops and would not create comebacks which potentially leave a stain on AECS reputation as a high quality equipment provider Please make use of this comparison report and see what processes we apply before we distribute any type of equipment Report If aircon has your interest please read in detail the comparison report that we prepared User interface First the front of the machine and the way the user interacts with the machine Italian Ecotechnics Low cost Chinese qUrOnmTaie RECHARGING Sollee User interface User interface The layout of the unit is clear The layout of the Chinese machine is also It has a 4 line LCD display clear The menu structure is intuitive The display is one line LCD The high precision software has built in The menu structure is very simple due to waiting time during recovery and automatic its limited abilities vacuum leak ch
4. unit monitors the pres sure A pressure increase indicates a likely leak in the system and the Ecotechnics machine will sound an alarm and stop the vacuum process When no leak is found the software progresses to the next stages deep vacuum oil UV fill and refrigerant charging During the vacuum process a heater increases the pressure in the on board storage bottle to speed up refrigerant charging The vacuum pump is large and robust The Chinese machine will turn the very small and frag ile looking vacuum pump on for a pre set duration The timer does not interrupt when for example a vacuum leak is present in the AC system Italian Low cost Chinese The small vacuum pump is switched on and off without any control other than a timer The vacuum pump is large and robust in the Italian machine and is controlled by smart electronics Service step 3 Charging When the recovery and vacuum process is complete the vehicle s AC system needs to be topped up with new oil and charged with refrigerant Oil charging The oil needs to be drawn into the AC system by the vacuum Created by service in step2 The oil will enter the hoses connected to the car and will be flushed into the AC system by the refrigerant filling procedure The oil quantity needs to be precisely measured as the AC system does not have an oil level gauge The oil which comes out during recovery waste oil needs to be measured and the new oil that need
5. e re frigerant flows through a filtration unit an oil separator a dryer a distillation tower another de acidising filter before the gas is compressed The high pressure gas is condensed before it is pumped into the storage bottle which is placed on a weight sensor for quantity measuring which is re corded by the controller The oil is removed from the refrigerant and put into a storage bottle which is suspended from a very sensi tive weight sensor The weight sensor reports to the Ecotechnics controller how much oil has been recov ered The Chinese machine also has a compressor which removes refrigerant from the car The refrigerant flows through an oil separator and through just one very small filter The compressor increases the pressure of the gaseous refrigerant and pushes it directly into the on board storage bottle No condenser is fitted which makes the temperature and pressure in the on board bottle very high Any compressor which needs to work in against high pres sure becomes exponentially less effective The fan fitted in the machine is supposed to cool the bottle to reduce pressure and to cool the compressor The separated oil is pushed into a waste oil bottle which has no weighing mechanism The only way to measure the oil is to look at the lines on the bottle During recovery the removal of refrigerant from the AC system cools the AC system down The cold system reduces the speed at which the liquid re
6. eck The last 50 grams re The machine does not have any waiting frigerant charging is done in small steps to time During recovery it switches off at achieve high charge accuracy ambient pressure Some refrigerant will The machine will automatically warn when a only evaporate after a waiting period It filter service is due does not automatically continue into vac A fill quantity database is stored on board uum or charging mode and is USB updateable No service warning as there is no counter The printer prints the used and recovered on board quantities of oil refrigerant and dye No printer the recovered and used vol It prints the diagnostic results and repair ad umes appear very briefly on screen and vice need to be written down It can do automatically flushing of the AC No taps between the machine and the system hoses Robust taps can isolate the machine from Small pressure gauges no electronic the car gauges also no bottle pressure sensor Clear analogue pressure gauges and elec No charge quantity database tronic pressure and temperature gauges on the LCD Hoses exit the machine from the front Service Step 1 Recovery The first step when servicing an aircon system on a vehicle is to recover the refrigerant filter it dry it sepa rate the oil weigh and store the refrigerant and meas ure the quantity of oil On the Italian Ecotechnics machine the on board com pressor removes the refrigerant from the car Th
7. esults in a very precise charge into the vehicle something which needs to be considered when working on for example 200 gram systems total charge on some late model BMW s with only 5 gram allowable deviation The Chinese machine will show a zero weight during charging and opens the solenoids till the manually en tered weight weight reduction of the bottle has been reached The solenoids will shut and procedure is regarded as completed This method is very imprecise We had about 100 gram difference in weight during different recover re charge cycles of 1000 gram refrigerant in a service tank The Chinese machine does not have a heater blanket to increase the bottle pressure during charging making the process very slow Italian Low cost Chinese Storage tank 22 Kg s The storage tank is tempera ture pressure checked for the presence of e g air The tank has a heater blanket for in creased charging pressure The storage tank has no temp sensor or heater mechanism The weight sensor has no transport safety device Both machines need to be able to be transported across rough areas or need to be able to be used in mobile applications For this purpose is the Italian ma chine equipped with a transport lock bolt The Chinese machine does not have this transport provision Purging With AC servicing it is very likely that air or other high pressure condensable gasses enter the storage tank AECS Equipment
8. frigerant trans forms into gas The pressure can be pulled down by the compressor to 0 2 Bar well under ambient on the Italian machine and down to ambient pressure on the Chinese machine The Italian machine will wait for a period at the end of recovery and monitors the pressure in the system A certain pressure rise indicates that liquid refrigerant is still evaporating in the vehicle s AC system The com pressor will switch on again to recover the last remain ing bit of R134a before it automatically enters into the next stage vacuum If during the vacuum stage the pressure suddenly rises to just over ambient the vac uum pump will switch off and the machine will indicate This IS special We have achieved a major price wind back The ATS Scope has the following features 1 50Mhz Four ch or dual ch with generator 2 Approx 35 000 pre recorded good patterns Clear pictures showing how to hook up Wiring diagrams and EFI tutorial 5 Save and share patterns laptop netbook Easy to use Concentrate on the vehicle Not on how to use the tool A super level scope has never been so close within your reach gt ATS 5000 2 channel signal generator or gt ATS 5004d 4 channel differential scope Expand your existing scope set multichannel sw build up a set or buy a Check out the spec s at www aecs net Many modern high tech options available like G sensor pressure sensor return f
9. ical Newsletter Aircon comparison It often seems very attractive to buy an on paper well spec d piece of equipment for a very low price directly from the internet or from a fly by night supplier AECS distributes Ecotechnics est 1995 aircon equip ment which is manufactured in Italy Wages in Italy are close to the wage levels in NZ which is many times higher than what the average factory worker in for ex ample China gets To us it seemed very attractive to start distributing cheaper aircon equipment to capture the low end of the aircon equipment market During our search we selected a prime manufacturer of aircon equipment in China Being a prime manufac turer means that a company produces the equipment in its own factory Many equipment manufacturers buy the equipment from prime manufacturers and simply put their stickers logo s and mark up on these machines We purchased and imported from this company the top of the line machine which had a truly impressive specification list and was priced at about 2 3 of a comparable Ecotech nics machine Ecotechnics Italy Low cost Chinese Automotive Electronic Control AECS Training Equipment and Data for Automotive Diagnostic Specialists Systems seller of AECS yun Wew ENF Full kit Wireless All connectors 2 years free upgrades X 431 Launch Diagun Scan Tool Features Blue tooth amp wireless technology Includes full set of
10. ld including AECS Ltd in NZ We have installed machines throughout New Zealand prices ranging for small workshops to large dealerships The VTEQ 2000 analogue brake tester at installed but excl work on building 2080 analogue brake tester NZ install done by AECS Ltd 17 000 gst The 3080 Suspension and l p brakes inspection test lane at 32 000 gst The 3080 k and 2080 has a testing E a ability of up to 6 ton axle F D weight and can test shocks and alignment in one drive 3080 digital testlane through Quick sturdy and NZ install done by AECS Ltd reliable Sales Installation and training by AECS Ltd The Italian machine s control unit automatically meas ures the weight of the bottle before charging begins It also turns automatically the heater on to increase the bottle pressure The AC charge quantity is selected from an on board database by selecting the vehicle type and model at the start of the service process The solenoids will shut approximately 50 grams before the correct charge quantity has flowed from the storage tank The solenoids will open in short bursts to pre cisely add more refrigerant till the correct quantity of refrigerant has been taken out of the machine s bottle When the correct weight has been reached the control unit will instruct the user on the display how to get the remaining refrigerant from the machine s hoses into the AC system This r
11. le ECK 760 2011 Standard price i 7916 GST Profit from our bulk buying Consider this beautiful quality Italian made Air conditioning machine User manual In most cases a small user s manual is a good thing or else it will not be read The Italian machine has an elaborate and clear user s manual The manual explains step by step every op tion the machine has It does not explain where certain functions are used for The user s manual is not an how to service AC systems training manual The Chinese machine has a very short to the point manual It does also not explain how the system works just which button to push and what you should read on the display Conclusion We have been lucky to be able to put both machines through a series of side by side tests and pull both ma chines apart with an objective mind Something most garages or aircon specialists cannot afford to do Both machines require a certain level of expertise to be able to operate effectively With the Chinese machine a far greater AC system understanding is required to prevent errors like damag ing the vacuum pump charging air into the car dis charging refrigerant into the atmosphere Prevention of over or under charging the vehicle is not possible The Italian machine has a control unit software oper ated so has far more safety and logic build in Safety for the operator the vehicle and the recovery recycle machine itself
12. low sensor AC pressure sensor Expandable to more channels Check out our web catalogue this is a very special deal Call us at 06 874 9077 or visit that refrigerant is still present in the system which needs to be recovered The Chinese machine s compressor will switch off when just ambient pressure has been achieved and that s it Even a substantial pressure rise does not restart the compressor The display indicates that the vacuum pump needs to be activated to continue This requires user intervention labour If any refrigerant is present in the AC system during the vacuum cycle it will be expelled to atmosphere by the vacuum pump If liquid refrigerant is still present it will destroy the vacuum pump as there is no safety The machine can also be switched into vacuum mode when the AC system is still fully charged We stripped the newly purchased Chinese machine and a new Ecotechnics Italian machine to inspect how each machine achieves the recovery process Italian Low cost Chinese Refrigerant Storage bottle The refrigerant is pulled through an oil separator and 1 filter before it is compressed and pushed directly into the storage bottle The separated oil flows into the waste oil bottle The refrigerant is pulled through the filtration dis tillation separation unit compressed and con densed before it is pumped into the storage bottle The waste
13. oil is pumped into the waste oil bottle for inspection and measuring Low cost Chinese The separated oil gets stored in a waste oil bot tle The weight increase on the sensor is a measure of quantity The separated oil is pushed into a waste oil bottle the quantity is measured by looking at the deviations on the bottle Service step 2 Vacuum After the refrigerant has been recovered and stored the AC system needs to be vacuumised with a vacuum pump The vacuum process removes any air mois ture and remaining refrigerant from the AC system No vacuum pump is able to remove moisture from the vehicle AC system s desiccant in the receiver dryer Also is it not able to remove liquid oil or particulates filings dirt etc from the AC system The vacuum pump can only remove vapour The vacuum time needs to be long enough to allow for example water to turn into vapour so it can be re moved For this reason the vacuum time for an aver age car is around 30 minutes The vacuum time can be adjusted to cater for individual conditions on both machines The vacuum pump will be on continuously during the vacuum time so it needs to be robust It needs to have a high precision pump for achieving the lowest possible vacuum to speed up the transformation process of water turning into vapour The Italian machine will automatically isolate the vehi cle from the running vacuum pump after ten minutes During 60 seconds the control
14. s to replace the extracted oil needs to be measured accurately too The Italian machine will automatically shut a solenoid valve when the correct quantity of oil has been entered the vehicle s AC system On the Chinese machine a button on the front of the machine needs to be pushed while looking at the de viations on the new oil bottle off the side of the ma chine When the correct amount of oil has been drawn out of the bottle you need to let go of the button Low cost Chinese The new oil is stored ina new oil bottle The weight decrease on the weight sensor is a measure of the oil quantity injected in the car s AC system The new oil is sucked into the service hoses from the new oil bottle The oil quantity is meas ured by looking at the deviations on the bottle Refrigerant charging The pressure difference between the vacuum in the vehicle s AC system and the refrigerant pressure in the machine s storage bottle makes refrigerant flow into the cars AC system The quantity charged in the car needs to be precisely measured as an under and over charged AC system runs inefficient in almost all cases cooling the cabin air less and increasing the vehicle s fuel consumption The quantity measuring is done by the machine with a weight sensor under its storage bottle AECS equipment made in Spain ye ae is a long established brake tester manuf producing equipment for distributors F all over the wor
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