Viessmann VITOLIGNO 300-P Installation Instructions Manual page 17

Making the electrical connections
Temperature limiter (maximum temperature limiter) for underfloor heating sys-
tems
C
B
M
A
1~
A Heating circuit pump
B Control thermostat (temperature
limiter)
C Plug sÖ of the control thermostat
(temperature limiter) to the control
unit
(cont.)
Electromechanical temperature limiter
according to the liquid expansion princi-
ple.
Switches the heating circuit pump OFF,
when the set value has been exceeded.
In such cases, the flow temperature
reduces only slowly, i.e. it may be sev-
eral hours before the system restarts
again automatically.
Specification
Setting 30 to 80 °C
range
Terminals Screw terminals for 1.5
2
mm
Switching
differential
▪ Immer-
max. 11 K
sion
thermo-
stat
▪ Contact
max. 14 K
thermo-
stat
Specification immersion thermostat,
max. 11 K, contact thermostat, max. 14
K
17