sputnique
05-09-2012, 08:53 PM
Hi guys
first time post so bear with me. I'm currently working fpr a French company on an Aquaciat Chiller with twin Copeland compressers. I found and repaired a leak on the low side so decided to empty all the system and recharge with the correct amount of R410. Everything went well, I got a good subcooling and superheat readings when the system was at full charge. When I reached operating temperatures, the system runs by alternating from one compresser to the other without ever having the two at the same time.
The whole circuit seems to be way too big for just the one compresser. The TXV has no way of downsizing to compensate nor can the evaporater although the condenser fan has a low speed and high speed cut-in.
The problem is, I've get a very low discharge temperature which is dangerously close to High side temperature readings. Am I running the risk of liquid slugging with such low discharge temperatures? Is there anyway I can raise the discharge temperature? The only thing I can think of is to increase the superheat but I'm reluctant to do this with just the one compresser ticking over.
first time post so bear with me. I'm currently working fpr a French company on an Aquaciat Chiller with twin Copeland compressers. I found and repaired a leak on the low side so decided to empty all the system and recharge with the correct amount of R410. Everything went well, I got a good subcooling and superheat readings when the system was at full charge. When I reached operating temperatures, the system runs by alternating from one compresser to the other without ever having the two at the same time.
The whole circuit seems to be way too big for just the one compresser. The TXV has no way of downsizing to compensate nor can the evaporater although the condenser fan has a low speed and high speed cut-in.
The problem is, I've get a very low discharge temperature which is dangerously close to High side temperature readings. Am I running the risk of liquid slugging with such low discharge temperatures? Is there anyway I can raise the discharge temperature? The only thing I can think of is to increase the superheat but I'm reluctant to do this with just the one compresser ticking over.