Minimum Collector Temperature Limit; Cyclical Heating - Viessmann VITOSOLIC 200 Installation And Service Instructions Manual

Minimum collector temperature limit

Minimum start temperature "TColmin"
that must be exceeded before the solar
circuit pump can start. This prevents the
pump starting too frequently. The collec-
tor array will be blocked if this tempera-
ture is not achieved.

Cyclical heating

■ If the consumer cannot be heated with
priority, the next consumer in line will
be heated for an adjustable cycle time
"t-circ.".
■ After this time has expired, the solar
control unit checks the rise of the col-
lector temperature during the cyclical
pause time "t-stop".
If the value "ΔT Col" is reached, "t-
stop" is set to zero and starts again.
■ As soon as the start conditions for the
consumer with priority have been met,
that consumer will be heated again.
Otherwise, the next-in-line consumers
will continue to be heated.
■ Once the consumer with priority has
reached its set temperature "Tcyl
set", it will no longer be taken into con-
sideration for cyclical heating.
Function description
Make the following settings at the
solar control unit:
Main menu
■ "Solar"
■ "Contractor"
– "TColmin"
Set a value.
Make the following settings at the
solar control unit:
Main menu
■ "Solar"
■ "Contractor"
– "t-stop"
Set a value.
– "t-circ."
Set a value.
– "ΔT Col"
Set a value.
When the consumers have reached their
set value "Tcyl set", heating to a higher
value "Tcyl2 set" can continue. This
function can be activated separately for
each consumer.
Make the following settings at the
solar control unit:
1. Main menu
■ "Solar"
■ "Contractor"
– "Cyl set"
Select the consumer that this
function should affect.
Set "Yes".
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