No. 859 is designed for drying powdered resin in trays. Workspace dimensions of the 550°F (288°C) shelf oven measure 44 x 30 x 60”, and 12 KW are installed in Nichrome wire heating elements. A 1000-cfm, 1-hp recirculating blower provides horizontal airflow to the workload. The oven has 4” insulated walls, Type 430 stainless steel interior and four independent doors for access to workspace. Features include 32 trays, a weekly timer to start and stop the oven, and a digital timer for each compartment with button and pilot light to indicate end of cycle. Controls include a digital-indicating temperature controller, manual-reset excess-temperature controller with separate contactors, recirculating blower airflow safety switch and a 10” diameter circular chart recorder.