John0246
Hey guys, had a look at a walk in freezer. The system is on R404a. Evaporator iced up due to defective thermostat, the liquid line drier was also blocked as I had a low suction pressure. Replaced the...
View ArticleSuggestions about topics to Phd study in the field of refrigeration
Hi guys I desire to do my Phd in refrigeration branch. What are new trends in refrigeration? What topics could you suggest to study during Phd? Thanks in advance.
View ArticleDaikin Multisplit 4MXS80E high current
Daikin inverter 4mxs80E with 2 x 2,5KW innside units (4mxs80E2V3B, FTXS25G2V1B, FTXS25CVMB8) Problem : always high amp draw (approx.18 amps), compressor the same frequency in forced mode as when 1 or 2...
View Articledaikin ftx25 indoor has vibration start and stop blower
hi...i have a daikin aircondition in my house and after 5 years ....now the blower on indoor unit has vibration and sound on full speed...other speed doesnt work start and stop only..the voltage on...
View Articlebeer cellar
hi guys, i have a customer that needs new cellar cooling but wants it to work over 35c ,because of the few hot days we have here in the uk :D. Anyone know of anyone other than the usual main suppliers...
View ArticleHrp hydrocarbon course tomorrow
Got the hydrocarbon course tomorrow... Thought I'd just say to all them guys on these courses... When the trainer says "any questions" ask something relevant... Not..."I was on this job once and...."...
View Articletesting S1 voltage at condensor then it went bang
Mitsubishi IND slim Split system with 2 indoor cassettes. Put my probes across S1 and the earth next to it from the 230v supply. I was under the understanding that S1 was 208v-240v so was stunned when...
View ArticleFound a small stash of R12 - What to do with it?
I was recently contacted by a friend who had been clearing out a shed and found some refrigerant cylinders. They contacted me and I went to see what they had found. It turned out to be four 13kgs...
View Articlecross-charge expansion valve
Hello i have stumbled upen the term cross-charge expansion valve, could someone explain this to me? regards
View ArticleDaikin 4PW71247 setback temperature
Good afternoon All I need your expertise to answer a question I have: is it possible to reduce the setback temperature on a controller Daikin 4PW71247 lower than 33°C? :) Can anybody please let Me...
View Articlesb200 thermoking code 36 and 84
i am having issues with 2 units failing after a hour or 2 of run time on electric. pretrip and runs fine on diesel... pretrips and passes on electric-- but as soon as we leave the system fails and...
View ArticleOverhaul a Old R12 Arneg Server over advice please
I have a customer who has a 2.5 mtr wide Arneg Serve Over. It was on R12, I knew this time would come ... The Evap coil has started to spring leaks. The engineer brazed them and re gassed with FX56. In...
View Articleseeking advice regarding an evaporator coil change out..
Good day to all, I am a newbie to this site but really appreciate what I have read in the forums you guys are really great for helping everyone out. which brings me to my dilemma. I have a 3.5 ton heat...
View Articlehello folks
hi to all from greek island kefallina have my own small company about 8 years now and mostly i work with daikin VRV found some very helpful answer in your site keep doing the good work :)
View ArticleEvap size and EER
Here is my thinking. We typically assume about 400 CFM per cooling ton across the evaporator. But let's say we increase the evaporator size and reduce the blower to 300CFM. The air discharge temp will...
View ArticleCombined chiller efficiency calculation
Hi, we would like to know how to calculate efficiency of a combined system of water cooled chiller and absorption chiller. Please provide advice and reference. Thanks
View ArticleLutron Anemometer & Center Leak Detector
Does anyone have any experience of these two pieces of equipment? When considering a Hot Wire Anemometer recently, I was faced with the choice of $1200 for a Testo 725 (with non-replaceable probe),...
View ArticleCompressor shaking after air conditioner shutting down
hi i received an old LG heatpump split ac unit that had leakage because of cracked capillary tube i cut 1 cm of the capillary then i weld it made vacuum for 30 minutes then charged it by weight and it...
View ArticleSavawatt control
Anyone have any information on the savawatt controls, ie wiring diagram? I have just done a pot change on a walkin freezer, and what a nightmare its been with leaks to say the least. But the old pot...
View ArticleThermoking container MP3000
Hi, my name is Alex velazquez from Cancun Mexico We had a MP3000 that doesnt work nothing, in the display show "err", voltaje is OK, in the maintenance information said that the problem could be the...
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