Solex Roofing Installation Manual 36
Solex Energy Ltd +44(0)1305 837223 www.solexenergy.co.uk
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2” ports
– these are designed for the installation of (European size) immersion
heaters, although they may be bushed down to accept other connections. A note on
immersions heaters: the units which we supply have 3x elements and so may be wired
for single or three phase. The thermostat will control single of three phase, and is a
dual unit having an overheat cutout. This is reset using the small black button, which
must be pressed hard to reset.
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¾” ports (4)
– these may be used for thermosensor pockets, or for any miscellaneous
inlets or outlets.
Unused ports are blanked with iron plugs.
Solar heating connections
– when used for combined solar water and space heating
systems, the connections should be as follows:
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Boiler flow to top 1¼” port, boiler return to mid point up the store. The boiler circuit
needs a pump, with both the pump and boiler being switched on by a stat on the
thermal store, ideally linked to a time switch which restricts boiler input during the peak
solar heating hours of 10am to 3 pm.
•
Radiator supply from top 1¼” port, radiator return to bottom 1¼” port. The radiator
circuit needs its own pump, switched by a room stat and timeswitch.
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Underfloor heating, Option 1 – dedicated supply from thermal store, supply from mid
point on store, return to lower 1¼” port. This is the most efficient option, especially
when using solar heat. Option 2 – connect the UFH manifold(s) across the radiator
supply circuit. With this method the solar cannot input so much heat to the UFH.
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Hot water from upper heat exchanger
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Solar heat into lower heat exchanger
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Wood burning stove, if present, into top 1¼” port, return from bottom 1¼” port. The
system may use gravity feed as long as the pipe runs, height difference etc is suitable
for this. Where a pumped system is used, a mixing manifold is available which
includes a pump for the stove circuit. This manifold only inputs water above 80
o
C into
the store, which ensures that the stratification of the store is maintained – cold at the
bottom and hot at the top.
Biomass connections
– when used with a biomass boiler, without solar, the connections
should be as follows:
•
Boiler flow to top 1¼” port, boiler return to bottom 1¼” port. The boiler circuit will
usually require a pump.
•
Heating supply (radiators and underfloor heating) from top 1¼” port, return to bottom
1¼” port. The heating circuit needs its own pump, switched by a room stat and
timeswitch.
•
Hot water from upper heat exchanger
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The lower heat exchange coil is not required.
