RUJUKAN AIRCOND

http://www.refrigeration-engineer.com/forums/forum.php?s=ead372396f9fc2122fc078ff09c38e1c

http://www.airconditioning-systems.com/split-airconditioner-control-troubleshooting.html

http://www.astiquer.com/pricing.html

http://www.3dair.co.uk/DOWNLOADS_may07/Error%20codes/Error%20Codes%20-%20R22%20&%20R407C%20Systems.pdf


http://cikgunas.net/cabin-filter/

FILTER DRYER AIRCOND KERETA ( PENYAMAN UDARA ) ~ OPERASI BONGKAR MUSNAH

Gatal tangan , x ada kerja nak buat.. So aku nak tahu apa kebenda yang ada dalam filter dryer tuh..

Moh layan

Keperluan Nitrogen Semasa Brazing

Is nitrogen a must while brazing AC lines?

 I have an R410A unit and I've read that an inert gas must be used to sweep the lines while brazing due to the r410a's ability to move the oxidation through the system than compared to an R22. Most people prefer nitrogen from what I've been reading, but it is becoming too hard or too expensive for me to get it.
I do have an air compressor and the air seems pretty dry. I have a filter from the factory on the liquid line of the condensor and I'm installing a moisture indicator as well.
I've heard that some still don't purge the lines if using a filter, bad idea? I can't imagine the oxidation to be that large and the filter would likely trap it and not clog the filter.
Thanks for the help!

 

failing to purge a 410a system with nitrogen before/during brazing wont necessarily cause a problem but increases the chance of a problem..the filter/drier in the liquid line will catch the "flakes" that form on the inside of the pipe and circulate through the system but even if you locate the drier near the indoor coil,you still have the solder joint at the outlet of the drier who's flakes wont be captured by the drier screen because they are downsteam of the body of the drier...those flakes could clog the strainer inside the txv,or otherwise affect the txv...i dont know why 410a systems are more prone to problems from failing to purge while brazing but i've been told that either the refrigerant itself or the "poe"oil in the compressor has a greater attraction to moisture than r-22 systems and their type oil..therfore doing everything by the book is more important on a 410a system,such as installing a large liquid drier [thats rated for puron],,purging with nitrogen while brazing,and evacuating system thoroughly before charging.......the flakes produced while brazing without nitrogen are caused by the presence of oxygen,not moisture.. nitrogen is basically air without the oxygen and moisture...it doesnt require very much nitrogen to purge the system,,just need to have a LITTLE pressure going in while leaving the other port open so it can flow without building any pressure that could cause solder joint leak from nitrogen exiting systen through the solder joint while brazing.....also be sure to take pressure and temperature readings while charging,,and charge per mfr recommendations....usually 10-12 deg "subcooling" is required...dont just add puron until the line gets cold........dan

 

http://answers.yahoo.com/question/index?qid=20090704064250AAXCiYZ 

 

Istilah HVAC / PPU / RAC

HVAC - Heating, Ventilation Air Conditioning.

PPU - Penyejukan dan Penyamanan Udara

RAC - Refrigeration and Air Conditioning

 

p/s ~ Bantuan dari pemilik http://sejukpeti.blogspot.com/

Maksud SuperHeat

Penjelasan

Definisi dari Superheat adalah differensial temperature antara temperature actual dengan temperature jenuh.yang di maksud dengan temperature actual adalah temperature yang diambil melalui pengukuran langsung dengan menggunakan thermometer baik yang digital maupun thermometer analog.sedangkan yang disebut termperature Jenuh(saturated temperature)adalah temperature hasil conversi dari pengukuran tekanan refrigerant yang dapat dibaca langsung dari manipold gauge atau dengan menggunakan table converse pressure dan temperature yang bisa kita temukan dikemasan refrigerant atau kita download msdsnya (beda merek refrigerant mempengaruhi temperature konversinya).

Contoh : refrigerant R 22
bila temperature actual didapatkan 7oc
Tekanan Refrigerant 60 psig ; bila di konversi ke temperature adalah sekitar 4 oc.
MAka seperheatnya adalah : Actual temp. 7oc – saturated temp. 4 oc. = 3 oc

Kegunaan Superheat

Mengapa kita harus mengetahui superheat?superheat sangat vital sekali di dunia refrigerasi,karena salah satu penyebab kerusakan compressor adalah superheat yang terlalu kecil atau hamper sama dengan Nol.superheat terlalu kecil biasanya diakibatkan oleh penggunaan txv terlalu besar ukurannya(Atau tidak di setting)adan txv yang rusak.

Cara pengukuran superheat sangat mudah sekali.pertama-tama kita sediakan alat-alat yang akan dipergunakan untuk mengukur superheat.alat yang kita butuhkan adalah sebuah manipold gauge yang baik dan sebuah thermometer(dianjurkan mengunakan thermometer digital yang mempunyai probe)

Copy dari http://yuzz-teknik.blogspot.com/