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5
WORKING WITH THIS UNIT
This section contains a guide on how to deal with the everyday usage of the unit. Next sections describe how to perform
routine tasks on the unit, such as:
•
Unit Setup
•
Unit/Circuit start-up
•
Alarm handling
•
BMS Control
•
Battery replacement
5.1
Unit Setup
Before starting up the unit, some basic settings need to be set by the customer according to the application.
•
Control Source
•
Available Modes
•
Temperature Settings
•
Alarm Settings
•
Pump Settings
•
Power Conservation
•
Date/Time
•
Scheduler
Control Source
This function allows to select which source should be used for unit control. (View Chapter 4.2.2). The following sources
are available:
Local
Unit is enabled by local switches placed into the switchbox, chiller mode (cool, cool w/glycol, ice), LWT setpoint and capacity
limit are determined by local settings in the HMI.
Network
Unit is enable by a remote switch, chiller mode, LWT setpoint and capacity limit are determined by an external BMS. This
function requires:
Remote enable connection to a BMS (unit on/off switch must be in remote)
Communication module and its connection to a BMS.
More parameters about network control can be found in 4.2.2.
Available Mode Setting
The following operating modes can be selected through the Available modes menu 0:
Mode
Description
Unit Range
Cool
Set if chilled water temperature up to 4°C is required. No glycol is generally needed in the water
circuit, unless ambient temperature may reach low values.
A/C and W/C
Cool w/Glycol
Set if chilled water temperature below 4°C is required. This operation requires proper glycol/water
mixture in the evaporator water circuit.
A/C and W/C
Cool/Ice
w/Glycol
Set in case a dual cool/ice mode is required. This setting implies an operation with double setpoint
which is activated through a customer supplied switch, according to the following logic:
Switch OFF: The chiller will work in cooling mode with the Cool LWT 1 being as the Active Setpoint.
Switch ON: The chiller will work in ice mode with the Ice LWT as the Active Setpoint.
A/C and W/C
Ice w/Glycol
Set if ice storage is required. The application requires the compressors to operate at full load until
the ice bank is completed, and then to stop for at least 12 hours. In this mode the compressor(s)
will not operate at part load, but will work only in on/off mode.
A/C and W/C
The following modes allow to switch the unit between heat mode and one of the previous cool mode
(Cool, Cool w/Glycol, Ice).
Heat/Cool
Set in case a dual cool/heat mode is required. This setting implies an operation with double
functioning which is activated through the Cool/Heat switch on the electric box
•
Switch COOL: The chiller will work in cooling mode with the Cool LWT 1 as the Active Setpoint.
•
Switch HEAT: The chiller will work in heat pump mode with the Heat LWT 1 as the Active
Setpoint.
W/C
Heat/Cool
w/Glycol
Set in case a dual cool/heat mode is required. This setting implies an operation with double
functioning which is activated through the Cool/Heat switch on the electric box
•
Switch COOL: The chiller will work in cooling mode with the Cool LWT 1 as the Active Setpoint.
•
Switch HEAT: The chiller will work in heat pump mode with the Heat LWT 1 as the Active
Setpoint.
W/C
Heat/Ice
w/Glycol
Set in case a dual cool/heat mode is required. This setting implies an operation with double
functioning which is activated through the Cool/Heat switch on the electric box
•
Switch ICE: The chiller will work in cooling mode with the Ice LWT as the Active Setpoint.
•
Switch HEAT: The chiller will work in heat pump mode with the Heat LWT 1 as the Active
Setpoint.
W/C
