Setting screen
Figure 66: Setting Screen
This screen displays control parameters (setting method and each setting parameter), valve
operation (control valve mode auto / manual and valve position setting), operation switch (forced
dilution, refrigerant pump, purge mode, and manual purge), language (Japanese, English, German,
Chinese) and date and time parameters.
Press the SETTING button to access this screen.
Control parameter
The Control Parameter section of the setting screen is used to enter parameters for the cooling
operation, such as target temperature, automatic stop temperature, and differential to automatic
restart.
Setting Method: The LOCAL and REMOTE buttons control whether the set point is being set using
the Control Panel or from a remote location. The button that is lit indicates if the set point is being
set using the Control Panel or from a remote location
Setting Base Temp.: The base temperature for calculating the set point
Remote Set. Diff.: The setting range with external 4-20 mADC signal
Set Point (Display): The set point of the chilled water leaving temperature
Automatic Stop: The temperature at which the chiller will automatically stop
Auto. Restart Diff.: The temperature difference between the temperature at which the chiller will
automatically stop and the temperature at which the chiller will automatically restart.
If you press the LOCAL button, the entered base temperature corresponds to the present target
temperature. Its temperature is shown in Set Point.
If you press the REMOTE button, the setting characteristics of the remote Set Point are determined
based on the setting base temperature and the remote setting differential. The actual target
temperature is calculated depending on these settings and the remote Set Point setting signal (4-20
mADC).
This calculated temperature is shown in Set Point as the present target temperature. If remote
set point setting signal (4-20 mADC) is out of its range when you press the REMOTE button, the
137YHAU-C Single Effect Steam-Fired Absorption Chiller
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