35
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
operation 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 first used to define 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