elgue
01-04-2010, 09:58 PM
Hey How u doing?
I just started working for this company that does refrigeration (most of my experience has been on Hvac residential and light commercial units) and they had me to install this condensing unit for a walkincooler with 2 evaporators (txv).
Now this is the third compressor going in in less than 8 years (2 compressors and now an Cond. Unit).
Having two coils with one TXv each,, how can I determine if one of the TXvs not working properly and letting some liquid go back to compressor?
I dont have any reading since I was just giving a hand to an old tech that just charged by sight glass and since this is my first week I dont wanna start in this company by contradicting to the knowall.
Basically He just gassed the thing by sight glass and we left. Now correct me if Im wrong 3 compressors in 8 years should be telling someone that something else is f..ed up.
But anyway, After cheking my subcooling, How can I check the superheat in each indoor coil If I dont have a service ports just after the evaporators? Or how can I see if each txv is reacting to load if there is not a service port after each evaporators?
I know that I dont have any readings but It would help me a lot if you kind a tell me what approach you would take.
Thanks
By the way, Didnt see any control other than a common solenoid valve on the liquid line and Txvs on each evaporator.
I just started working for this company that does refrigeration (most of my experience has been on Hvac residential and light commercial units) and they had me to install this condensing unit for a walkincooler with 2 evaporators (txv).
Now this is the third compressor going in in less than 8 years (2 compressors and now an Cond. Unit).
Having two coils with one TXv each,, how can I determine if one of the TXvs not working properly and letting some liquid go back to compressor?
I dont have any reading since I was just giving a hand to an old tech that just charged by sight glass and since this is my first week I dont wanna start in this company by contradicting to the knowall.
Basically He just gassed the thing by sight glass and we left. Now correct me if Im wrong 3 compressors in 8 years should be telling someone that something else is f..ed up.
But anyway, After cheking my subcooling, How can I check the superheat in each indoor coil If I dont have a service ports just after the evaporators? Or how can I see if each txv is reacting to load if there is not a service port after each evaporators?
I know that I dont have any readings but It would help me a lot if you kind a tell me what approach you would take.
Thanks
By the way, Didnt see any control other than a common solenoid valve on the liquid line and Txvs on each evaporator.