I don't know exactly how the tray works, but when you are using hash, you should break it up as much as possible so hot air can travel around it, and extract what you want. If you just load one long, thick piece of hash in a vaporizer, you will need more heat to get it going due to low surface area. The same with oils, but it's not as bad. You should still use SMALL pieces of oil, and separate them because once heated, they will spread A LOT, and still absorb a lot of the heat.
For a quick, proper extraction, using real small pieces(size of poppy seeds), and separation of the concentrate, is the best for low to medium high heat(350f-410f) for a quick extraction.