Catalogue

RLC-PRC042D-EN 21
Controls
System Integration
Stand-Alone Controls
Single chillers installed in applications without a building management system are simple to install
and control: only a remote auto/stop for scheduling is required for unit operation. Signals from the
chilled-water pump contactor auxiliary, or a flow switch, are wired to the chilled-water flow
interlock. Signals from a time clock or some other remote device are wired to the external auto/stop
input.
• Auto/Stop - A job-site provided contact closure turns the unit on and off.
• Emergency Stop - A job-site provided contact opening wired to this input turns the unit off and
requires a manual reset of the unit microcomputer. This closure is typically triggered by a job-
site provided system such as a fire alarm.
Hardwire Points
Microcomputer controls allow simple interface with other control systems, such as time clocks,
building automation systems, and ice storage systems via hardwire points. This means you have
the flexibility to meet job requirements while not having to learn a complicated control system.
Remote devices are wired from the control panel to provide auxiliary control to a building
automation system. Inputs and outputs can be communicated via a typical 4–20 mA electrical
signal, an equivalent 2–10 Vdc signal, or by utilizing contact closures.
This setup has the same features as a stand-alone water chiller, with the possibility of having
additional optional features:
• Ice making control
• External chilled water setpoint, external demand limit setpoint
• Chilled water temperature reset
• Programmable relays - available outputs are: alarm-latching, alarm-auto reset, general
alarm, warning, chiller limit mode, compressor running, and Tracer control.
BACnet Interface
Tracer AdaptiView control can be configured for BACnet
®
communications at the factory or in the
field. This enables the chiller controller to communicate on a BACnet MS/TP network. Chiller
setpoints, operating modes, alarms, and status can be monitored and controlled through BACnet.
Tracer AdaptiView controls conform to the BACnet B-ASC profile as defined by ASHRAE 135-2004.
LonTalk Communications Interface (LCI-C)
The optional LonTalk
®
Communications Interface for Chillers (LCI-C) is available factory or field
installed. It is an integrated communication board that enables the chiller controller to
communicate over a LonTalk network. The LCI-C is capable of controlling and monitoring chiller
setpoints, operating modes, alarms, and status. The Trane LCI-C provides additional points beyond
the standard L
ONMARK
®
defined chiller profile to extend interoperability and support a broader
range of system applications. These added points are referred to as open extensions. The LCI-C is
certified to the L
ONMARK Chiller Controller Functional Profile 8040 version 1.0, and follows
LonTalk FTT-10A free topology communications.
Modbus Interface
Tracer AdaptiView control can be configured for Modbus™ communications at the factory or in the
field. This enables the chiller controller to communicate as a slave device on a Modbus network.
Chiller setpoints, operating modes, alarms, and status can be monitored and controlled by a
Modbus master device.