I’m about ready to say Hubers are fucking garbage and nobody should buy them, ever. I guess I don’t have experience with the ones bigger than the Unistat 815’s we have but the problems I’ve seen I’m not exactly eager to give them a chance. The Pilot One interface is neat, but so far on 3x Unistat 815’s we’ve seen:
- One has worse cooling performance than the others right out of the crate. Suspect a pump issue. In communication with Huber about it.
- Can’t reset an alarm from the HMI, have to power off and reboot.
- If there’s a way to make the chiller attempt to restart after an alarm, I haven’t found it in either interface or manual. Can’t imagine I’m the only one using these with expensive products.
- Documentation is painfully bad
- Data logging software doesn’t want to read log files from chillers. Has a “patch” I can download from Huber’s website, but doesn’t think the original program has been installed when I try and install the patch software.
- Been a month for price & availability on process thermocouple. Nothing. God forbid they just stock or sell me the fuckin connector so I could wire my own.
- One has touchscreen errors, frequently, for no apparent reason
- Air burping process is dumb and takes forever
- Published specs for cooling performance must have been tested inside a walk-in freezer
- Not enough expansion tank volume & level gauge is slow to register actual level. Spillage is almost guaranteed when trying to fill.
- Not enough fan area/power (can get considerably better performance by putting a box fan by the exhaust, pulling hot air away from the unit
I want to get a descent amount of ethanol from our storage freezer at ~-25C to -45 for our process. Above 80F/26C ambient temps the Unistats can barely maintain temps on 60 gallons in an insulated reactor, much less actually cool that far in a reasonable amount of time. These weren’t going to be our “forever” solution for that but they were supposed to be a good stopgap.
Long term to hit the rate I need I want to get 105 gallons an hour cooled down from -25C to -45C. I realize this is going to take a massively large and expensive system to do so. Needless to say this is going to cost cubic dollars, and I’d like to only do so once. Curious if anyone has experience with systems that large that aren’t going to be huge, poorly designed disappointments like these smaller lab chillers have been.