Samson TROVIS 5431, Монтаж и эксплуатация

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4-point heating characteristic (C01 F04-1, PA1 or via control switch)
For the 4-point characteristic, you must deter-
mine 4 points which indicate the correlation
between the outdoor and the flow tempera-
ture. When you have selected the return flow
sensor, you can also determine the return
flow temperature for each
point. This setting, however,
is only possible on the PA1
level, and not via the control
switch.
The points are determined
with flow/return flow temper-
atures t
F
/ t
RF
of 20 to
120 °C and outdoor tempera-
tures t
O
of
−
20 to
50 °C. Fig. 10 shows an
example (factory setting of
flow characteristic).
In the reduced operating
mode, the characteristic is
set-back by the ‘set-back tem-
perature’. For this, you must enter a set-back
temperature for the points P1 and P2 as well
as an additional set-back temperature for P3
and P4. The factory setting then shows the
displayed dashed characteristic curve.
Outdoor temperature (CO1 F07, F08)
The outdoor temperature can be applied to
input OS via temperature sensor or to ana-
log input AI via a 0 to 10 V signal. The out-
door temperature is used, when you activate
CO1 F07-1.
Without the outdoor temperature (C01
F07-0), the maximum flow set point value is
used during the times-of use. In the times of
non-use, this value is set back (reduced oper-
ation), unless you set ‘processing of exter-
nally required signal’ (CO-SYS F11-1).
Use function block CO1 F08 to indicate
whether you are using the outdoor tempera-
ture at the OS (F08-0) or at the AI (F08-1).
5.4.2 Reduced operation (PA1)
During the times of non-use, a reduced flow
set point value is used (reduced operation).
This value is the flow set point reduced by the
parameter ‘Set-back of flow temperature for
reduced operation’ (default value 15 °C).
If the outdoor temperature exceeds the ‘Out-
42
EB 5431 EN
Functional descriptions
0 10 5 -5 -15 15 20 [
˚
C]
t
O
-10 -20
10
20
30
40
50
60
70
80
90
P1
P2
P3
P4
TF
T
F max
T
F min
[
˚
C]
Fig. 10 ⋅ 4-point heating characteristic