I have a York M/N YIASTIA2. Its a little machine, however I cannot get it to make range, stop crystallizing, and I never see any evap overflow. It takes FOREVER to load up. Once it loads and makes temp, it backs off and goes into ADC mode. My refrigerant is trashy. I feel overflow as soon as my steam valve opens. I have a clean bill of health from the chemist, I added a half gallon of alcohol, and I have a great vacuum. My flows are in range, and the "engineers" punched the tubes. Here are the numbers:
Steam: 14.39psia after the valve, 21psia feeding the valve, 230F outlet. Valve at 82% (machine loading)
Refrigerant: 62F, S.G. 1.12,
Chilled Water: 64F on, 58 off.
Condenser: ABS in 81, 87 out, 93 cond out.
Weak Solution: 97F, S.G. 1.56, 121F to generator.
Strong Solution: 178F into the HX, 120F out. 1.64 S.G
The rate limit is set to .5, and the valve pulse is set to 1 minute.
My main concern is a huge (80f) TD between the strong solution into the HX and the strong solution leaving the HX, I have de-crystallized the machine, but nothing changes.
I need help!