Test Chambers manuals

Hi,

I have quite old test chambers in electronics factory. We are using these test chambers to warm electronical components up to 200 degrees (Celsius) and then cooling down to - 70 degrees (Celsius). Unfortunatey we dont have any technical manuals. Does anyone knows there to get manuals for :

Sanyo HCC065 PF 7J
Voetch VLK 08/300

Thanks