All data reported in the table, will be respected only if the chiller is operating within its operating limits.
The Fan Silent Mode function can be enabled only for units equipped with VFD fans.
4.1.3 Network On/Off
Chiller On/Off can be managed also with serial protocol, if the unit controller is equipped with one or more communication
modules (BACNet, Modbus or LON). In order to control the unit over the network, follow below instructions:
1. Q0 selector = Local (refer to 4.1)
2. Unit Enable = Enable (refer to 4.1.1)
3. Control Source = Network (refer to 4.5)
4. Close the contact Local/Network Switch (refer to 4.5), when required!
4.2 Water Setpoints
Purpose of this unit is to cool or to heat (in case of heat pump) the water temperature, to the setpoint value defined by the
user and displayed in the main page:
The unit can work with a primary or a secondary setpoint, that can be managed as indicated below:
1. Keypad selection + Double Setpoint digital contact
2. Keypad selection + Scheduler Configuration
3. Network
4. Setpoin Reset function
As first step the primary and secondary setpoints need to be defined. From main menu, with user password, press on
Setpoint.
Ranges of the Cool, Heat,
Ice setpoint are reported
in the IOM of every
specific unit.
Primary cooling setpoint.
Secondary cooling setpoint.
This item is visible only when the Setpoint Reset function is enabled and
it shows the actual reset applied to the basic setpoint
Primary heating setpoint.
Secondary heating setpoint.
The change between primary and secondary setpoint can be performed using the Double setpoint contact, always
available in the user terminal box, or through the Scheduler function.
Double setpoint contact works as below:
- Contact opened, the primary setpoint is selected
- Contact closed, the secondary setpoint is selected
In order to change between primary and secondary setpoint with the Scheduler, refer to the section 4.1.2.
When the scheduler function is enabled, the Double setpoint contact is ignored
When the operating mode Cool/Ice w/Glycol is selected, the Double Setpoint contact will be used to switch between
the Cool and Ice mode, producing no change on the active setpoint
To modify the active setpoint through network connection, refer to Network control section 4.5.
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