Hitachi SAMURAI Series Service Manual page 45

2. Control Functions
Control functions on the module
2.1.17 Thermo OFF function selection
This function prevents thermo OFF of the chiller unit due to sudden changes of temperature or flow.
Example of standard settings:
Outlet water temperature
7
6
Example of thermo OFF judgement extension
Outlet water temperature
7
6
Does not stop immediately even if
temperature becomes lower than
thermo OFF temperature
This function is used in cases in which the water flow is reduced temporarily, such as when opening and closing the valves
installed in the water piping system, or when switching the number of cold (hot) water circulating pumps in operation.
However, in case that water temperature reaches the limit of the working range, thermo-OFF occurs even within 10
minutes.
37
SMGB0082 rev.1 - 07/2015
Inlet water temperature
Stop with 10 continued seconds at thermo OFF temperature
Inlet water temperature
10 minutes
Setting temperature
Thermo OFF temperature
Stop with 10 continued minutes
below thermo OFF temperature
2