Measure the temperature of the tube that leaves the evaporator at a distance of one foot and compare it with the pressure you have in temperature
Example
- You have 27psi in the suction, you are looking for the temperature pressure table of 404a which in this case would be -7 f
- You measure the temperature of the tube that I told you
-Respect evaporation temperature which in this case would be -7 at which you give the other measurement
The difference must be between 10 and 12 f
If you give much less you have excess gas
If it gives you very high, say 20 means that there is a lack of gas
This is how the efficiency of the cooling equipment is checked
My corduroy currently pressures were 25 and 260. I managed to frost the evaporator but it seems that I need more frost to keep the temp down. And if I better open the valve?
If you open the valve you will have more psi in the suction. Where you have placed the bulb of the VET.
Another thing: that I have put hole 3 affects me at something to the temp ?? I had num 2.
That depends on your team. Do you know what the original was?
Did you put the 404a in liquid or gas phase?
And if I have more psi in suction, how does it affect me? When I open the vet, the liquid evaporator will fill me more.
Well, it would also be nice to know what your camera is for.
Because from -21 ° C to -23 ° C approx you want to achieve there is not much difference.
And another thing, the gas charge is not considered based on pressures only. Each equipment is designed with an amount in kg of gas to be carried.
That is, if it is designed with 5kg, do not intend to reach your task with half. So leave the pressures as the best engineer tells you.
As long as it is not fully loaded, it will not perform as it should.
Friends, I tell you that I managed to lower the temperature of the camera to -11F thanks for your help