Hitachi YUTAKI Series Instruction And Operation Manual page 160

UNIT CONTROLLER
Water Calculation Mode
The main parameter for configuration of space cooling is the water calculation temperature.
The water calculation establishes the temperature setting for each circuit, selecting a function to assign each temperature setting
depending on the ambient temperature.
Each circuit has its own Water Calculation Mode for cooling. Booth circuits may be
configured as:
• Disabled
•
Points
•
Fix
To switch between them the variable type must be edited.
?
N O T E
• Setting a space cooling circuit at "None" does not deactivate it for space heating. They are independent circuits.
• Installer may ban the possibility of switching between water calculation modes. In that case the user is not be able to edit the water calculation
variable type.
None
The "None" option sets the circuit as disabled.
Points
Points is the most versatile calculation type. The user sets four points that will create line
representing the function the Air to water heat pump will be use to give the temperature
setting according to the current ambient temperature.
Fix
This calculation mode sets the circuit's temperature setting to a defined value, forcing the
unit to maintain it.
148 PMML0335A rev.1 - 04/2016