RM Solar Combi Konverter Solar System Installation Manual - page 6
Fig 5
Cold Return Pipe
The mains cold feed needs disconnecting from the Combi boiler and a new cold feed given to the mains
pressure cylinder via the unvented inlet control set components.
(DO NOT use the 22mm pipe laid early, as instructed in Connections and Pipe work)
Connection at the cylinder should be made using the ½”x22x22mm compression tee (supplied). The
probe thermostat and pocket (supplied) are connected to this tee as illustrated. (See fig 6).
Cut a Tee into the cold mains feed to the cylinder, (It is important that the Tee is connected at a point
between the unvented inlet control set components and ½”x22x22mm Tee cylinder connection see fig
6) and now connect the 22mm pipe laid earlier (as instructed in connections and pipe work) to the spare
tapping on this Tee. (This pipe will be referred to as Combi cold feed from here onwards).
On the Combi cold feed pipe, install the Bronze pump and valves (supplied) with the pump flow pumping
to the Combi boiler.
Most installed combis are not tolerant to incoming ‘cold’ water temperatures of above 30oC but if in doubt
the Combi manufacturers advice on the maximum temperature should be sought . A limit thermostat (see
Fig 6) is fitted on the cold feed to the cylinder, this can be set to the appropriate maximum temperature
(normally 30oC).
Where the combi is ‘solar compatible’ then this limit thermostat can be set at a higher temperature as
required.