I plan to install a new twin-coil solar HW cylinder soon, and plan to
convert the CH system from gravity-fed to fully pumped at the same time.
(Solar coil to be utilized at a later date)
Currently the boiler and pump are downstairs with 28mm gravity-feed pipes
and 22mm CH pipes heading upstairs.
There is currently 1 thermostat downstairs, and no cylinder stat. TRV's on
all rads but 1.

I plan to utilise the original pipework where possible but move the CH pump
to upstairs and install a motorized valve to divert flow between CH and HW.
I'll also fit a cylinder stat.

I *could* also use a motorized valve to create upstairs & downstairs zones
if worthwhile.
The programmer supports fully pumped with cylinder stat and (I think) 2
zones - will check.

Any recomendations from the group of which CH plan to go with and whether
it's worth creating upstairs & downstairs zones?

Any suggestions on plumbing config and type of motorized valves to use?

Thanks in advance,

Alan.