Energy Efficent Boilers

Only this simple technology allows achievement of operation free from thermal inertia issues. Avoiding the problems created with excessive water temperature when the circulation cycle ends. During this time, which is a typical characteristic of the main part of existing boilers with gas-air premixing technology (before the gas-air mixture enters the burner), the burner and the heat exchanger transfer to the water the residual heat stored in terms of very high temperature levels reached by their metal parts during the previous active burning phase.

The water temperature rises rapidly, quickly taking the water to boiling point & causing boiler safety & security devices to trip.

To address this problem, older generation boilers kept the circulation pump on for several minutes after burner cutting off and, in the summertime, also the ventilation fan must run to assist in dispersal of the excess heat produced; this represents real energy which does not achieve satisfactory long term economy.

In consequence of this, these type of boilers which declare high instantaneous yield, on the other hand show quite low long term overall yield (evaluated taking into account the stop periods, the ignition periods, cutting off, post-ventilation which are part of the normal operation cycle of such boilers).

This is why last generation technologies use two different heat exchangers. The use of two heat exchangers (plus a third one for hot sanitary water production) avoids the introduction of thermal inertia issues and, by this and, by this way, both the instantaneous and the long term average yields of the boiler are maximized.

NEW TECHNOLOGY - SOLAR INTEGRATED COMBI BOILERS

The PixelFast SUN advantages and its integrated system

1. Automatic function on both Heating and Domestic hot water system.
2. Cylinder contains primary hot water. System doesn't not store domestic hot water, so the cylinder doesn't need to be glass lined/stainless steel, etc giving significant cost savings.
3. It doesn't need supplementary pump because it uses only the boiler pump (it saves a pump and its electric connexion).
4. No risks of boiler commutation: two electronic panel boards (boiler & solar) are together inside the boiler, interacting with each other.
5. Maximal system efficiency: the solar injection is On the boiler return on heating system, that is the Colder part of installation. It's a serial circuit and not a parallel circuit. Is enough that solar temperature is 2 degrees higher than return system to take the heat power from the buffer tank.
6. It doesn't need external hydraulic connexions only the two solar pipes flow and return to the cylinder.

7. It doesn't need exist external electric connections, except for the sensor on solar tank.
8. The boiler still works with priority on sun system. Solar installation accumulates energy and boilers works if solar system doesn't supply enough energy.
9. Maximal temperature on primary system fixed at 72°C to limit the lime-scale production.
10. With Floor Kit accessory, cod. ECMIX01P, it's possible supply both low and high temperature circuits.
11. No legionella possible

PixelFast Sun is different for its innovative hydraulic group with an integrated mixing motorized three ways valve and for its additional electronic board managing the external heating source.

1. Supplementary electronic board managing the external heating source on external buffer tank and managing the motorized three way valve.
2. The integration of three ways valve on the hydraulic group. .

Significantly using solar gain for radiators circuit/under-floor heating in addition to domestic hot water, ensuring greatly running costs not only confined to domestic hot water production.