From the Vaillant system boiler commissioning manual:
"The boilers are fully modulating for central heating, and
it is therefore not necessary to range rate the boiler.
However, if desired, it is possible to range rate the boiler,
as follows:"
And from the open vent manual:
"The heating partial load of the product is set to Auto at the
factory. The product independently determines the optimum
heating output depending on the current heat demand of
the system. You can retroactively change the setting in the
Diagnostics menu."
Looks quite similar to my non-heating-engineer eyes!
P.
"The boilers are fully modulating for central heating, and
it is therefore not necessary to range rate the boiler.
However, if desired, it is possible to range rate the boiler,
as follows:"
And from the open vent manual:
"The heating partial load of the product is set to Auto at the
factory. The product independently determines the optimum
heating output depending on the current heat demand of
the system. You can retroactively change the setting in the
Diagnostics menu."
Looks quite similar to my non-heating-engineer eyes!
P.
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