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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.
Temper.
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