27
Settings
menu 5
10
10
10.7
∆
T R2
menu 5.x
= switch-on temperature difference for relay R2
If this temperature difference between the reference sensors is exceeded and
the other conditions are also met, then the controller switches the pump and/or
the valve on. If the temperature difference drops to 1/3 of this value, then the
pump and/or the valve is switched off again.
Setting range: from 4°C to 20°C/default setting: 10°C
Caution
Setting the temperature difference too small may lead to ineffective op-
eration of the system and to frequent switching of the pump, depending
on the system and sensor positions.
10. Settings
(continued)
If the temperature at sensor 3 falls below this value and then a positive value is
set under
“
Hysteresis
”
, then relay R2 is switched on as additional heating. The
additional heating remains active until the temperature at sensor 3 has risen to
Tsetpoint S3 plus the hysteresis.
If the temperature at sensor 3 exceeds this value and a negative value is set
under
“
Hysteresis
”
, then relay R2 switches on as a heat dissipation function. The
heat dissipation function remains active until the temperature at sensor 3 has
fallen to Tsetpoint S3 minus the hysteresis.
Setting range: from 0°C to 99°C/default setting: 60°C
10.8 Tsetpoint S3
menu 5.x
= thermostat function at sensor 3
10.9 Hysteresis
menu 5.x
= hysteresis for thermostat function at sensor 3
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!
This setting is
fi
rst used to de
fi
ne whether the thermostat function is used as
additional heating (=positive value) or for heat dissipation (=negative value). A
determination is also made as to how many °C of heating-up or cooling-down
will be carried out from the set value Tsetpoint S3. If the setting is 0 then the
thermostat function is switched off.
Setting range: from -20°C to 20°C/default setting: 10°C
