DeltaControl – Operation
N 15-M – Subject to technical changes
02.17
13
Protective Functions
• Frost protection:
Must be activated
(
➔
“System Diagram” section, p. 11
)
if Tyfocor is not being used in the
solar circuit. If the collector tempera-
ture falls below 5°C, the solar pump
is activated and the solar circuit is
supplied with storage tank heat.
• System protection:
The solar circuit
pump switches off if the collector
temperature exceeds 120°C. The
controller resumes normal operation
when the collector temperature
returns to below 100°C. (These limits
are not configurable.)
• Pump blocking protection:
To prevent
the solar circuit pump becoming
blocked during long periods of down-
time, the controller switches the
pump on for 30 seconds every 10
days. (These limits are not config-
urable.)
• Flow monitoring:
Notification is given
if flow impairments occur. These may
arise, for example, from a pump fault
or steam being present in the sys-
tem. The pump is not switched off.
• Sensor monitoring:
Sensors and sen-
sor lines are constantly monitored
and faults shown on the display
(
➔
“Status Readouts”, p. 14
).
• Power outage protection:
Standard
values are saved regardless of how
long mains power is disconnected.
Resistance measurement values for the PTC Pt1000
Sensors that are not connected
have resistance values that are
shown in the table at various
temperatures. You can check these if
you suspect that a sensor is faulty.
Temp. [°C]
[Ohm]
Temp. [°C]
[Ohm]
Temp. [°C]
[Ohm]
-20
921
30
1,116
80
1,309
-10
960
40
1,155
90
1,347
0
1,000
50
1,194
100
1,385
10
1,039
60
1,232
120
1,461
20
1,077
70
1,271
140
1,535
EN
