Hi, have just purchased Hotpoint MAC 130 portable aircon via gumtree. Came without manual, so could someone please advise a. what long small hose at middle back is for b. what tap/hose at bottom is for. In addition, when demonstrated, aircon worked a treat, I plugged it in at home and went like a dream but then started to make a clicking noise. Couls someone advise if I am to use water anywhere or if there are other switches or indeed anything I am unaware of. Much appreciate any help