5
2 - CONTROL SYSTEM OVERVIEW
2.1 - Control system
Touch Pilot is a system used to control the operation of
single-circuit and dual-circuit air-cooled liquid chillers
(30XAV / 30XAV-ZE).
This document may refer to optional components and
certain functions, options or accessories may not be
available for the specific unit.
2.2 - System functionalities
The system controls the start-up of the compressors
needed to maintain the desired heat exchanger entering
and leaving water temperature. It constantly manages the
operation of the fans in order to maintain the correct
condensing pressure in each circuit and monitors safety
devices that protect the unit against failure and guarantee
its optimal functioning.
Touch Pilot control system:
•
Allows users to control the unit via the Touch Pilot
user interface (7-inch colour touch screen)
•
Provides web connectivity technology
•
Includes the trending functionality
• Supports
Carrier Connect Services
(Remote connectivity, alarm notification, remote
access, performance and operation automatic
reporting, technical advice)
• Supports
Carrier Advanced Plant System Manager
for
multiple chillers configuration
•
Provides direct BMS integration capabilities
(BACnet IP)
BACnet IP
BACnet IP
Standalone chiller
Building Automation System
CarrierConnect
Services
Chiller
plant
Chillers
Meters
Valves
Pumps
Building Automation System
CarrierConnect
Services
Touch Pilot
control
TOUCH PILOT CONTROL
2.3 - Operating modes
The control system can operate in three independent modes:
•
Local mode:
The unit is controlled by commands from
the user interface.
•
Remote mode:
The unit is controlled by dry contacts.
•
Network mode:
The unit is controlled by network
commands (CCN or BACnet). Data communication
cable is used to connect the unit to the CCN
communication bus.
The operating mode can be selected with the
Start/Stop
button (see also section 4.3). When the Touch Pilot system
operates autonomously (Local or Remote), it retains all of
its control capabilities but does not offer any of the features
of the Network. The Network emergency stop command
stops the unit regardless of its active operating type.
