5.20 - Tmax S1
Switch-off temperature at sensor 1
If this value is exceeded at sensor 1 and the other conditions are also met, then the
controller switches the pump and/or valve off. If sensor 1 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
Danger
Temperature values which are set too high can lead to scalding or dam-
age to the system. Scalding protection must be provided by the cus-
tomer!
5.8 - ∆T R1
5.11 - Tref (Thermostat)
Reference temperature at sensor 1
Heating = 1st value smaller than the 2nd value
If the temperature drops below Tref On (1. value) at sensor 1 and the thermostat
function is enabled, (see 5.5), the relay for additional heating is switched on until the
temperature reaches Tref Off (2. value).
Cooling = 1st value higher than the 2nd value
If the temperature exceeds Tref On (1. value) at sensor 1 and the thermostat function
is enabled (see 5.5), the relay for cooling is switched on until the temperature drops
below Tref Off (2. value).
Settings range:
Tref On: -10°C - 90°C / Default: 50°C
Tref Off: -20°C - 99°C / Default: 60°C
Switching condition: Temperature difference for relay R1:
If the temperature difference T between the reference sensors is exceeded and the
other conditions are also met, then the controller switches the pump/valve on. If the
temperature difference between the reference sensors drops to Toff, then the pump/
valve is switched off again.
Settings range: ΔT: 3°C to 50°C / ΔToff: 2°C to ΔT minus 1
Default: ΔT 10°C / ΔToff 3°C.
Caution
If the set temperature difference is too small, this may result in
ineffective operation or frequent clocking (switch-on and switch-off) of
the pump.
Caution
When sensor S2 is installed, S1 is used as lead for switch on and S2 as
switch off.
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