Reaching freezer problem
Hi everyone hope you are having a good day.My company just took over an account that someone has been working on and couldnt fix. And to be honest all of are experience is in small soda coolers until now.
The problem is with a reaching freezer with remote compressor with 401a. It seems to be working fine till they lose power and when it turns back on it goes off on high limit. It wont be able to reset for an hour or two once it does. I tested this by turning off the breaker while it is running and I cant get it to start back up unless I manually equalize the unit through my gauges.
So when running at 5deg the pressure are 20 and 220
When I hit the breaker it goes to 2 and 250
When it starts it goes to 60and 425 and goes off on reset.It has a new txv that is external balance, filter dryer from the last company.
The unit has a sporlan b6f1 solenoid and a Ranco ETC-111000-000 control.
I dont have a heat or cool for you because I couldnt get a good reading with my thermometer.Any help with this will be great.
Originally Posted by Mike O
We really need SH #’s!
When you kill power the suction goes from 2#’s and the head goes up? Impossible!
How much experience do you have and in what field?
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Just quickly scanning your post reminded me of a heat pump I worked on a while back actually I installed it but the liquid line was run through extremely high ambient and due to the hard closed txvs on either end of the liquid line it trapped the liquid in there with no way for it to escape so as the liquid reached the attic temperatures of 150° or higher it tripped the high pressure safety and locked the unit out until the sun went down allowing the liquid to cool but as long as the unit was running it was totally fine. I don’t know if this has anything to do with what you’re dealing with but just a phenomenon to keep in mind. If there’s any way that liquid could be trapped in a line running through very high ambient temperatures and the high pressure safety is on that section of line odd things can happen.
“Is this before or after you fired the parts cannon at it?” – senior tech
I’m tired of these mediocre “semi flammable” refrigerants. If we’re going to do it let’s do it right.
Unless we change direction we are likely to end up where we are going.
“It’s not new, it’s better than new!” Maru.
But I see no way possible the suction could drop when you turn off the unit I think you’ve got some measurement error.
“Is this before or after you fired the parts cannon at it?” – senior tech
I’m tired of these mediocre “semi flammable” refrigerants. If we’re going to do it let’s do it right.
Unless we change direction we are likely to end up where we are going.
“It’s not new, it’s better than new!” Maru.
Sounds like the unit either has a failed or mis adjusted cpr valve. Or it needs one added.
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I have been in the field since I was 18 and now 44. Most residential and light commercial refrigeration. First time working on a reaching freezer. Sorry it is 404a refrigerant. With the solenoid on the liquid line closing on loss of power either to defrost or power lost to building the suction line will drop. That’s normal from what I am told. When it goes off on temp pressure equalizes to an existent.At the moment I’m -7 in the freezer and have a suction pressure of 12# and 10 deg. My thermometer is reading 34deg. This is at the compressor since ther are no ports at the evaporator.
The liquid is 240# w/144 deg. And thermometer is 94deg both at compressorThere are no baubles
240 psi is 100.9° bubble so that’s 6° ish subcooling which is not unusual for a reciever system.
“Is this before or after you fired the parts cannon at it?” – senior tech
I’m tired of these mediocre “semi flammable” refrigerants. If we’re going to do it let’s do it right.
Unless we change direction we are likely to end up where we are going.
“It’s not new, it’s better than new!” Maru.
How does the suction drop when the building looses power?