Hi Rob thank you for your reply, All is expected is just to wire up, If they wish for me to build a control panel then I can do so, but normally I have a better understanding how they work, I can read schematics but i can't seem to find any.
For example I have a walk in fridge, they have told me its working on a pump down cycle, I have a controller, Hp/LP switch Evap fan, condenser unit and solenoid valve to wire, If I have a diagram jobs a good one as thats my bread and butter.
Due to the fact I can't find any diagrams I let this one go, as i don't want egg on my face, but I am now very keen to find how its done as knowledge is power. if you can offer any help it would be very appreciated Rob