Ammonia Refrigeration Training Wisconsin. Kuhlman Inc sponsored this Ammonia Operator 1 Course. Kuhlman’s corporate office where the classroom training was held is 2nd to none and we were treated like kings. By fare one of the best classrooms we have utilized, and we are excited to come back in August and teach another round (registration at this link) The onsite training at a local facility was icing on the cake. Thank you for letting us use your engine room! To see our other dates and locations for the Ammonia Training Tour please see this link.