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X
= -20ºC,
A
X
= -10ºC,
B
Y
, Y
, Y
, Y
– set-point valve temperatures for their corresponding outside
A
B
C
D
temperatures: X
After weather control is enabled the valve set-point parameter is
calculated based on the heating curve. By changing this parameter you can
decrease or increase all the weather control settings.
9. Return protection
This feature allows you to enable protection for the boiler from excessively
cold water returning from the main circuit, which could cause the boiler to suffer
from low-temperature corrosion. The return protection function works to ensure
that when the temperature is too low the valve will close partially until the short
circuit of the boiler reaches the desired temperature. This feature also protects
the boiler from a dangerously high return temperature to prevent water from
boiling.
When this function is enabled you need to set the minimum and maximum
return temperatures.
X
= 0ºC,
C
X
= 10ºC,
D
, X
, X
, X
A
B
C
D
ST – 450 z PID
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