Wisconsin Parts Database Instructions and Discussion Team/Group > OTHER STATES
> Electrical Components
> Replace
> New
> Without Warranty
> 285CF walk-in tenney engineering environmental chamber
285CF walk-in tenney engineering environmental chamber
Large 285 cubic foot WALK-IN Tenney Engineering Environmental Chamber WITH HUMIDITY CONTROL. 32KW heating. Dual (Cascade) 30 hp refrigeration compressors. -70C to 100C+? temperature range.
The chamber of this unit is more than twice as large as any we have had to date. The chamber is about 9.5 feet long, 5 feet wide and 6 feet tall. This calculates to about 285 cubic feet. Overall dimensions are about 17' long by 6.5 wide by 9 tall.
The refrigeration systems originally used R-502 and R-13 but the placard indicates a conversion to R-404A-we assume for the 502. (R-404A is readily available where R-13 is about impossible to find.) We assume the refrigerant has been evacuated and will need to be replaced once this unit is delivered to its final destination. It would thus need the oil changed on the R-13 side to us R-23, R508B or SUVA 95 as a replacement.
Skimming through all the documentation the last couple hours, I have concluded it was designed for -70 to 100 degrees C. Humidity is supposed to be variable from 20 to 90% RH over the temperature range of 20 to 90 C. The humidity charts indicate as low as 5% and as high as 98% but you can't reach those extremes at every temperature. The components seem to be rated for considerably broader range of temperature. The main controller can be set from -100 to +300C. There is 60HP of refrigeration compressor and 32KW of electric heating. My guess is the unit would do 200C just fine as long as you are not trying to do humidity at the same time (you might have to reconfigure temp controller max setting and replace fuseable link. Standard on the low temp side is -40C but this unit was specially over sized to go to -70C and to handle an active testing load of 10KW. The refrigeration system has been upgraded to more modern refrigerants and I have found no documentation to indicate if this would have changed cold side performance.
The control panel door has been removed and is sitting inside the chamber as shown below. While there is some reconnection work to be done, this unit looks to be pretty much complete and there is documentation.
The exterior of this unit looks to be in pretty good shape without a lot of denting.
The door latch assembly is shown above.
The image below shows the chamber interior. The control electronics, auxilary circulation fans and documentation are on the floor of the chamber. There is considerable fixtureing and wiring for connecting to items under test.
We fanned-out the documentation for the image below.
Additional similar items may be listed separately or available on request.
Might be just what you need for your walkin environmental chamber application.
Condition looks use as shown above. There will need to be some serious but reasonable (for a unit like this) service work done for installation and startup.
