2.3. Heating cylinder water only
When hot water is required (via the timer) and it is less than the hot water set temperature of 55˚C,
the Solar 3C hot water controller will signal the boiler, bringing the boiler/heat pump and the
primary pump on. When the DHW zone valve is open, hot water will flow around the cylinder boiler/
heat pump coil, heating the water and return back to the boiler. The zone valve is closed to
prevent water flowing around the cylinder heating coil circuit. This is similar to the standard “S” plan
arrangement.
2.4. Heating & hot water demand
In this mode, there will be a demand signal to the boiler causing it to start and the primary pump
to be switched on. The DHW zone value will open allowing water to flow through the cylinder
heating the water. In addition, the Solar 3C mixing valve is switched to allow water through into
the domestic hot water heating system. When the cylinder water has reached the correct
temperature, the DHW zone valve is switched off so that only the heating circuit is supplied
(as described in “Heating the dwelling”).
5
For illustration purposes only.
For illustration purposes only.
Summary of Contents for 3C382B
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