Dunham Bush PCX 350H
Hello, Does anyone know the nominal duty of a Dunham Bush PCX 350H chiller. The 350 doesn't seem to refer to Tons of refrigerant or kW when you consider the full load amps of the compressor is rated at...
View Articleusing external sub cooling unit for super feed, please help
hello every buddy i want to upgrade my 50 ton brine chilling plant ( glycol 50 % ). i am going to give external cooling unit for sub cooling R 22 in super feed PHE ( brazed type ) it may be possible i...
View ArticleCiat heat pump access codes
Hi all , does anyone have the access codes for Ciat heat pump model aquaciat 2 ild and service manual for these unit. thankyou.
View ArticleDaikin Multi Split blowing fuse
Hi all had a call out yesterday to a Daikin RY200F7W1 multi split heat pump. Customer reported no power to unit. On arrival noticed all 4 cassettes not running and controller blank. At outdoor found...
View ArticleYork Mini Split Error Codes
Have a York 1 ton Mini Split AC unit giving me the F6 error code (fan motor) have replaced the fan motor and still getting the F6 error code? Could i have a corrupted circuit board? maybe the fan...
View ArticleEnergy consumption
(this querie follows a discussion I had with our Cheif Electrical Engineer this morning). Back ground for those outside of Australia. I am based in Alice Springs, Central Australia. Presently, our...
View ArticleR410a - what connections?
Hi Guys I'm here to ask for your help because I'm a bit confused, the service ports are supposed to be 5/16", correct? But when you go on a catalogue to buy hoses, connections or gauge manifolds, you...
View ArticleThermo King V200MAX PSE code
Hi there can anyone help me with a v200 max I am a fridge engineer. I have a v200 max showing PSE when you switch on. There is gas in system(5bar). PSE High Pressure Sensor Fault 1. This alarm code...
View ArticleVrv2 pumdown
Hi can anyone tell me the procedure of pumping down a daikin 3 pipe vrv 2 , need to install a bs box and don't want to waste time reclaiming gas ?? And how do I know that someone has responded , I'm...
View ArticleHot Gas Bypass
Hi All Came across a compressed air dryer today that fed hot gas after expansion valve and into suction line before expansion valve sensing bulb. Outlet from bypass valve went to a tee, then it went...
View ArticleJIS Screws!
Have any of you noticed when fitting Japanese air con that the philips head screws are often a poor fit in screwdrivers. Maybe like me you put this down to poor quality screws soureced from china or...
View ArticleMitsubishi controller flashing RC
I have a Mitsubishi controller flashing RC on the screen. A power down cleared it but I would like to know the cause? Any ideas please?
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vav and balancing
Chaps have we any air balancing experts here?? Got asked to tender some air balancing and verification prior to a refit. The total air needs confirming and each unit tested. The site has 25 VAV units...
View ArticleElectrical or gas problem with my freezer. What do you think?
Hi all, I'm so-so with the electrical side but a total n00b with the gas side. The freezer is an upright 340litre, Westinghouse FJ383Q-R. It uses R134a (126g). Until recently it was working fine except...
View ArticleManufacturers Over Brazing 1/4" Joints Causing Blockage
Has anyone else come across batches of VRV indoor units with 1/4" pipe retrictions and blockages occuring on account of poor manufacturer quality workmanship - over feeding of solder into joints such...
View ArticleTexas Seeking Info on HC Refrigerants
Howdy from Texas. Well, looks like the US is opening up limited use of HC R290 and R600a. I would really appreciate some advice/info from you guys on best practices, types of service equipment/tools...
View ArticleRetrofitting 410a on a Propane system
Recently I've come across a type of heat pump that has serious problems with invertors and compressors and are costing customers a fortune in repairs. Most people have asked me is it possible to...
View ArticleFume Cupboard test
Sup everyone! Need to test some fume cupboards tomorrow....thinking of getting some smoke pellets from Climate Centre and setting one off... will be able to confirm if it contains it and extracts it......
View Articlepurging and pressuring ac with n2
hi every one i want to use n2 in purging and testing ac for leaks and first time to me my q are 1_ what precautions i must make in care when use n2 in purging etc.... 2_ which type of n2 i must use...
View Articlemarshal heat pump split defrost problem
hi i have marshal 2 ton split unit r22 in heating mode the unit is not defrost and the outdoor fan never stop working then discharge temp is 110 c suction is 55 c 13 a current the heat of the indoor...
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