Example 3, Application With Rising Temperature; Example 4, Application With Falling Temperature - Grundfos IO 112 Montage- Und Betriebsanleitung

8.3 Example 3, application with rising
temperature
The application is controlled by a Pt1000 sensor.
The pump must start when the temperature of for
instance a liquid reaches the minimum level (limit 2)
and stop when the temperature reaches the maxi-
mum level (limit 1).
Alarm limit
Limit 1
Limit 2
Fig. 9 Application with rising temperature
An alarm limit must be set above the maximum level.
Alarm limit:
Limit 1:
Limit 2:
Alarm limit
The alarm limit must always be set first.
Switch settings:
Switch 1: OFF (down).
Switch 2: ON (up).
Switch 4: ON (up).
Switch 7: OFF (down).
Turn the potentiometer until the indicator light for
100°C illuminates. Wait 5 seconds until the value has
been stored.
Limit 1
Switch settings:
Switch 1: OFF (down).
Switch 2: ON (up).
Switch 4: ON (up).
Switch 7: ON (up).
Turn the potentiometer until the indicator light for
60°C illuminates. Wait 5 seconds until the value has
been stored.
Limit 2
Switch settings:
Switch 1: OFF (down).
Switch 2: ON (up).
Switch 4: OFF (down).
Switch 7: ON (up).
Turn the potentiometer until the indicator light for
40°C illuminates. Wait 5 seconds until the value has
been stored.
12
PT
120
100
80
60
40
20
o
C
100°C
60°C
40°C
8.4 Example 4, application with falling
temperature
The application is controlled by a Pt1000 sensor.
The pump must start when the temperature of for
instance a liquid reaches the maximum level (limit 2)
and stop when the temperature reaches the mini-
mum level (limit 1).
Limit 2
Limit 1
Alarm limit
Fig. 10 Application with falling temperature
An alarm limit must be set below the maximum level.
Alarm limit:
Limit 1:
Limit 2:
Alarm limit
The alarm limit must always be set first.
Switch settings:
Switch 1: OFF (down).
Switch 2: ON (up).
Switch 4: OFF (down).
Switch 7: OFF (down).
Turn the potentiometer until the indicator light for
20°C illuminates. Wait 5 seconds until the value has
been stored.
Limit 1
Switch settings:
Switch 1: OFF (down).
Switch 2: ON (up).
Switch 4: OFF (down).
Switch 7: ON (up).
Turn the potentiometer until the indicator light for
40°C illuminates. Wait 5 seconds until the value has
been stored.
Limit 2
Switch settings:
Switch 1: OFF (down).
Switch 2: ON (up).
Switch 4: ON (up).
Switch 7: ON (up).
Turn the potentiometer until the indicator light for
60°C illuminates. Wait 5 seconds until the value has
been stored.
PT
120
100
80
60
40
20
o
C
20°C
40°C
60°C