Technical data

Page 19/ 24 34-81 10/2013
8. MODULATION BUFFER
Kind of action: Heating
Reference probe: TP2
Related Parameters: Th4, HY4
NOTES
1. This function references probe TP2 and will trigger output 4 to reduce the signal to 4mA when the temperature of
Th4 is reached by TP2 and hold it until TP2 drops below TH4+HY4. Output 4 then returns to normal operation
referencing TP1.
9. DYNAMIC RESET OF St1
Kind of action: Inverse
Reference probe: TP3
Related Parameters: tt, rr2, St1, rr1
If the outdoor temperature is lower than tt the dynamic reset of the St1 action starts as described in the following
diagrams.
Tem per.
Outdoor
Temper.
Set1+rr1
Set1
tt + rr2
tt
NOTES
1. With rr1=0 the dynamic reset of the set point 1 is disabled.
2. If the TP3 is not present (P3P=no) or broken, the dynamic reset of the set point 1 is disabled.
10. WARM WEATHER SHUT DOWN
The tt2 parameter, referring to the outdoor probe TP3, establishes the upper threshold which all the relay outputs are
open. Normal regulation restarts when TP3< tt2+Ht2.
To disable this function set tt2 to high a value. If the third probe is not present P3P=no, this function is disabled.
Probe 2
Th4
Th4+HY4
20ma
Out 4
4ma
Time
Probe3
Temperature