General Information; Control Unit Function Modes - Viessmann OpenTherm VITOTROL 100 OT Operating Instructions For The System User

General Information

Control Unit Function Modes

Your heating contractor set the function during commissioning.
Two function modes are possible:
• Room temperature-dependent operation: If no outside temperature sensor and no heating circuit
with mixer is connected, function mode "ROOM CONTROL" must be selected.
• Weather-compensated operation: If an outside temperature and a heating circuit mixer are
connected, function mode "OT CONTROL" must be selected.
The settings you can make vary depending on the function mode selected.
Note: DHW Heating is active continuously or in accordance with the set switching times, regardless
of the function mode set.
Note: You will have to select the function mode again following a reset.
General Information 3