HERMS Control Unit

This is the heart of the V1 Brewery, the HERMS control unit. The facia has 3 PID controllers mounted on it. The 2 left hand PID units have a power on/off switch to their right, and a red 'power out' indictaion LED, the right hand PID only has a switch. The PID on the left controls an element in the HERMS heat exchanger to maintain mash temp. The central PID controls an element in my HLT for hitting strike and sparge temps, and the third PID is used as a thermometer for inputs from various PT100 probes in the brewery. The furthest 2 switches on the right control the HERMS recirculation pump (March 809HS) and also a general purpose pump (Totton GP 20/12). To the rear of the unit we have from left, a cooling fan to keep the unit cool, a socket to receive inputs from a PT100 switch box (which are displayed on the right hand PID). Then there are 2 input sockets for the PT100 probes from the HE and HLT. Next is a fuse, power 'out' sockets for the general purpose pump and the HLT element, then a power 'in' socket for that circuit. The next circuit starts with power out sockets for the HERMS heat exchanger element, the HERMS recirc pump, then a power 'in' socket for that set of feeds, plus a fuse.
Apologies for any misuse of 'terms'...I'm not an electrician ;-)