plumbing my heat exchanger in

[steve and lou]

hi i live in kent herne/bay
and i need help to plumb my heat exchanger in
all the pipes are run and buried the heat exchanger is in place i have a digistat and hep20 fittings and zone valve i just need help to plumb it in please
can pay for time /petrol
been told its not a huge job but not sure of doing itmyself
any help out there would be appreaciated
steve