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Switchmaster SM805 wiring query

Postby Mag020 » Wed Oct 21, 2020 12:08 pm

hi all, i have moved into a new house and i am looking at the wiring in to an SM805 unit. it is going to be replaced but when i have looked at the back plate diagram versus what's going in i think it is wired incorrectly. i think the boiler on and off are actually going in to the water tank on off. is this right judging from the attached pictures? hot water and heating are both working. any thoughts are welcomed as i am confused with this. not touching it just want to get a handle on what the layout is.
wire 3.jpg
Inked20201020_193211_LI (3).jpg
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