RM Solar Combi Konverter Solar System Installation Manual - page 3
Fig 2 Charging Sequence
Preparing for installation
The installation can be carried out by any competent person in accordance with the relevant building
regulations.
In order to properly commission the system the installer should be equipped with a suitable digital
thermometer to check flow temperatures. In most instances the combi boiler will already be in place thus
a route has to be found for additional pipe-work from the boiler to the hot water cylinder.
You will need to run two additional 22mm pipes from the boiler to the cylinder, one for the cold water feed
and one for the hot water draw off. The 22mm pipe that is allocated to the hot water draw off needs to be
adequately insulated.
As the cylinder is unvented it can be sited virtually anywhere in the dwelling but bearing in mind the likely
position of the solar panels then an upstairs position will probably be favourite.
If the combi boiler was retrofitted to replace an old vented hot water storage system then a suitable site
might be the old airing cupboard. As is the case with all unvented systems the provision of a suitable
route for the discharge pipe might be the over riding factoring determining the best position.
In order for the system to operate there has to be a flow and return circuit from the combi to the cylinder
and for optimum performance the hydraulic resistance of this circuit needs to be minimised . The
circulating pump is capable of overcoming a 6 metre head resistance but some of this will be needed to
overcome the hydraulic resistance of the combi itself. This proportion will vary from combi to combi and
needs to be checked by the installer. In some circumstances it may be necessary to order an additional
bronze circulator pump to overcome the hydraulic resistance.