Hitachi CSNET MANAGER XT Installation And Operation Manual page 73

4.7.5
Setback function is a protection against high and low temperatures.
Selection of the sensors let decide which one of them will be used. In case of more than one it use the average to take decisions.
In case of RCS group, one master unit should be selected.
Low temperature protection:
When temperature is lower than start temperature and unit is OFF, the unit is started in heating mode with the minimum heating
temperature as setting.
In case that stop temperature is higher than minimum heating temperature, the setting send to the unit will be the stop
temperature.
When the stop temperature is reached, setback is stopped and previous unit setting is restored.
High temperature protection:
When temperature is higher than start temperature and unit is OFF, the unit is started in cooling mode with the maximum cooling
temperature as setting.
In case that stop temperature is lower than maximum cooling temperature, the setting send to the unit will be the stop
temperature.
When the stop temperature is reached, setback is stopped and previous unit setting is restored.
N O TA
67 PMML0409A rev.1 - 10/2016