Control Overview; Control System; System Functionalities; Touch Pilot Components - Carrier Touch Pilot Control Series Control Manual

3 - CONTROL OVERVIEW

3.1 - Control system

19PV units come with the Touch Pilot control that serves as a user
interface and a configuration tool for controlling the operation of
the chiller.

3.2 - 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 unit to
maintain the correct refrigerant pressure in the circuits and
monitors safety devices that protect the unit against failure and
guarantee its optimal functioning.
Touch Pilot controls:
- compressor start-up to control the water loop
- fixed or variable-speed pumps to optimise water loop
operation

3.3 - Touch Pilot components

The controller manages a number of mechanisms that allow the
unit to operate effectively, including the following:
- 7-inch touch screen
- BMS connection
- Oil-free centrifugal compressor technology
- Diagnostics
- Web connectivity / e-mail transmission
- Cooling / Heating control
- Dry Cooler Free Cooling control (optional)
- Condenser dry cooler control (optional) – only LEN connector
provided (dry cooler installed separately)

3.4 - Operating modes

Touch Pilot control may operate in three independent modes:
- Local: The unit is controlled by commands from the user
interface.
- Remote: The unit is controlled by dry contacts.
- Network: The unit is controlled by network commands. Data
communication cable is used to connect the unit to IP
connection.
When the control operates autonomously (Local or Remote),
it retains all of its control capabilities but does not offer any features
of the Network mode.
IMPORTANT: Emergency stop!
The Network emergency stop command stops the unit
regardless of its active operating type.
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