Thermo Off Function Selection - Hitachi SAMURAI Series Service Manual

2 Control Functions
Control functions on the module

2.1.14 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:
Inlet water temperature
Outlet water temperature
2
Setting temperature
7
6 Thermo OFF temperature
Stop with 10 continued seconds at thermo OFF temperature
Example of thermo OFF judgement extension
Inlet water temperature
Outlet water temperature
7
6
10 minutes
Does not stop immediately even if
temperature becomes lower than
thermo OFF temperature
Stop with 10 continued minutes
below 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.
31 SMGB0120 rev.0 - 11/2017