Dear spectroscopists,
we use some BCU-1 cooling units and were unhappy with the cooling power of two of them.
We tried to find out the reason and finally succeeded (at least temporarily), but having no background
Information made these attempts not that easy.
Our solution simply was to refill some R404A freezing agent with is easily done by a specialist. Of course
There has to be a reason for the loss of freezing agent. Difficult to say, where a leakage might be. But the more
Challenging part was the question how much freezing agent is necessary.
Searching extensively we found this data sheet
http://www.kaelte4you.de/manuals/AEZ2411Z.pdf
(don't worry its written in French and English language ...). Because the specialist already was gone; I have no idea, whether these
Data are useful or not to estimate the necessary amount of freezing agent.
Maybe it's helpful for you. At least the attempt to refill freezing agent is much cheaper than the exchange of the whole BCU-1.
One question is still open: what happens, if you switch between the power steps 1 and 2? I found no scheme
Explaining the background.
Have a nice evening
Rainer
Received on Thu Jun 30 2016 - 07:58:42 MST