barker case problems
Just installed 4 barker deli cases and having trouble making temp and running out of ideas.
Case model PF-8 and PF-6
The txv is frosting after the valve and the frost doesn't make it through the first pass. So what I did at first was open the valve up a bit to get more flow with no result.
The valve in the 8ft case is a SBQE with AA cartridge and the 6ft case has a SQ with a 2 cartridge. The valves came with 404 a power element and the rack is running 507.
I verified all cartriges were correct from the factory.
So I had no luck opening the valve so I installed 507 power elements on with no change.
I checked the spec sheet and case is supposed to have 200fpm DA which is does.
Also Added a sightglass and access port in the liquid line.
Full column at the txv and 180psi liquid pressure.
At case liquid 180psi
78* F liquid line temp
SC around 3*F
55*F suction temp
I currently have one txv all the way open with little to no change.
Any ideas? Thanks in advance