I´ve been told that the large throttling valve located in the discharge line of the compressors activates whenever there´s a circuit in desfrost mode: it partially blocks off the path of the gas, redirecting it towards the defrosting cicuit. Also, I have noticed that whenever the throttling occurs, head pressure and temperature rise. Knowing this, is it posible to increase the defrosting power of the hot gas by adjusting this throttling valve? Some of the evaporatoirs of this rack are not getting effective defrosting: seems to me like the hot gas reaching them is not hot enough.