07/2015
Temperature Difference Controller TDC 3
Page 29 of 47
5.4 Tmax S2
Switch-off temperature at sensor 2
If this value is exceeded at sensor 2 and the other conditions are also met, then the controller
switches the associated pump and/or valve off. If sensor 2 falls below this value again and the
other conditions are also met, then the controller switches the pump and/or valve on again.
Setting range: from 0 °C to 99 °C/Default setting: 60 °C
5.5 Tmax S3
Switch-off temperature at sensor 3
If this value is exceeded at sensor 3 and the other conditions are also met, then the controller
switches the associated pump and/or valve off. If sensor 3 falls below this value again and the
other conditions are also met, then the controller switches the pump and/or valve on again.
Setting range: from 0 °C to 99 °C/Default setting: 60 °C (in hydraulic variants without S3
Default: Off)
5.6
∆
T R1
Switch-on/switch-off temperature difference for relay R1
If this temperature difference between the reference sensors is exceeded and the other conditions
are also met, then the controller switches the relay R1 on. When the temperature drops to
∆
T Off,
then R1 is switched off.
Settings range:
∆
T from 4 °C to 20 °C /
∆
TOff from 2 °C to 19 °C
Settings range:
∆
T 10 °C /
∆
TOff 3 °C.
Danger
Temperature values which are set too high can lead to scalding or damage
to the system. Scalding protection must be provided by the customer!
Danger
Temperature values which are set too high can lead to scalding or damage
to the system. Scalding protection must be provided by the customer!
Caution
If the set temperature difference is too small, this may result in ineffective
operation, depending on the system and sensor positions.
Special switching conditions apply for speed control (see 7.9)!