icesav
23-10-2009, 10:22 PM
Hi Guys,
Here is a question that has probably been put forward a number of times before.
I work with small split systems mainly Cornelius units i.e Maxi 110. 210, 310 300, Classic 1000, Polarflow rage etc etc.
Now and then we do get some fridge decks that come with no charge amount so we pretty much have to guess the charge. I will clamp on and reclaim any refrigerant in the system and weigh it to try and get some indication but some systems come almost empty because of leakage etc.
So here is an example of what I do.
1. Run the unit to see if the comp runs and see if the condensor gets hot, high side and check for signs of sweat on the evap coil.
2. Locate charge line and clamp on piercing pliars and reclaim the refrigerant, check my gauges to see what pressure is in the system if any and note the refrigerant weight.
3. Fill the system with OFN @ 350 psi to leak test useing soapy water, locate and repair any leaks on the system and replace filter drier.
4. Vac the system out to approx 5.5 -2 and turn off vac pump and ensure it holds negative pressure to check again for any signs of leakage.
5. Because I wont know the charge amount I set me digi scales to 0 and begin to charge the system 30g at a time and then run the comp until the return on the comp begins to sweat.
Dont many like this with no problems however I cant help but feel I should be doing it the "proper way".
I have only done ACRIB and Industrial Brazing, and BRA stainless steel brazing so I am still learning alot about refrigeration.
Can anyone advise me ?
As a note all the work carried out is always factory based and always on second hand units which are sent to us for repair.
Cheers Guys;)
Here is a question that has probably been put forward a number of times before.
I work with small split systems mainly Cornelius units i.e Maxi 110. 210, 310 300, Classic 1000, Polarflow rage etc etc.
Now and then we do get some fridge decks that come with no charge amount so we pretty much have to guess the charge. I will clamp on and reclaim any refrigerant in the system and weigh it to try and get some indication but some systems come almost empty because of leakage etc.
So here is an example of what I do.
1. Run the unit to see if the comp runs and see if the condensor gets hot, high side and check for signs of sweat on the evap coil.
2. Locate charge line and clamp on piercing pliars and reclaim the refrigerant, check my gauges to see what pressure is in the system if any and note the refrigerant weight.
3. Fill the system with OFN @ 350 psi to leak test useing soapy water, locate and repair any leaks on the system and replace filter drier.
4. Vac the system out to approx 5.5 -2 and turn off vac pump and ensure it holds negative pressure to check again for any signs of leakage.
5. Because I wont know the charge amount I set me digi scales to 0 and begin to charge the system 30g at a time and then run the comp until the return on the comp begins to sweat.
Dont many like this with no problems however I cant help but feel I should be doing it the "proper way".
I have only done ACRIB and Industrial Brazing, and BRA stainless steel brazing so I am still learning alot about refrigeration.
Can anyone advise me ?
As a note all the work carried out is always factory based and always on second hand units which are sent to us for repair.
Cheers Guys;)