25
5.3
T
5.4 Tref
Reference temperature at sensor 1
Heating = 1. value smaller than the 2. value
If the temperature drops below Tref On (1. value) at sensor 1 and the thermostat func-
tion is enabled, (see 5.6), the relay for additional heating is switched on till the tem-
perature reaches Tref Off (2. value).
Cooling = 1. value higher than the 2. value
If the temperature exceeds Tref On (1. value) at sensor 3 and the thermostat function is
enabled (see 5.6), the relay for cooling is switched on till the temperature drops below
Tref Off (2. value).
Settings range:
Tref On: 10°C - 90°C / Default: 50°C
Tref Off: 0°C - 99°C / Default: 60°C
Settings
Switching condition: Temperature difference for relay R:
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:
Δ
T 3°C to 20°C /
Δ
Toff 2°C to
Δ
T minus 1
Default:
Δ
T 10°C /
Δ
Toff 3°C.
Caution
If the set temperature difference is too small, this may result in inef-
fective operation or frequent clocking (switch-on and switch-off) of the
pump.
The following settings only apply when hydraulic variant 6 (thermostat)
is selected.
Caution
Caution
When sensor S2 is installed, S1 is used as lead for switch on and S2 as
switch off.
