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CG-PRC007-EN50
hardware, software and interconnecting
wiring are in proper operating condition.
The modules (boards) shall be protected
to prevent RFI and voltage transients
from affecting the board’s circuits. All
field wiring shall be terminated at
separate, clearly marked terminal strip.
Direct field wiring to the I/O boards is not
acceptable.
The microprocessor’s memory shall be
nonvolatile EEPROM type requiring no
battery or capacitive backup while
maintaining all data.
2
Zone sensor will be available for zone
temperature reset.
3
The Human Interface Panel’s keypad
display character format shall be 40
characters x 2 lines. The character font
shall be 5 x 7 dot matrix plus cursor. The
display shall be Supertwist Liquid Crystal
Display (LCD) with blue characters on a
gray/green background which provides
high visibility and ease of interface. The
display format shall be in clear English.
Two or three digit coded displays are not
acceptable.
4
The keypad shall be equipped with
16 individual touch-sensitive membrane
key switches. The switches shall be
divided into four separate sections and
be password protected from change
by unauthorized personnel. The six main
menus shall be STATUS, SET POINTS,
DIAGNOSTICS, SETUP,
CONFIGURATION and SERVICE MODE.
Standard power connections include
main three-phase power and a single
115-volt, 24-volt single-phase connection
that handles unit controls.
Unit accepts any of these jobsite
supplied contact closures for:
External Auto/Stop
— A contact closure
that will start and stop the unit operation.
External Chilled Solution Interlock
— A
chilled solution pump interlock in
combination with a flow switch is not
required for unit protection since the unit
controller senses loss of flow. If
additional flow protection is required, or
if the pump contactor is used to schedule
the unit, this input may be used.
Kw Demand Limit
— Unit will only be
allowed to operate on user selected
quantity of compressors in order to
maintain the building demand limit.
Ice Building
Two ice building modes are optional and
can be ordered on the unit. The two
modes are one time ice build mode and
continuous ice build mode.
Miscellaneous Options
Trane Communications Interface Module
(TCI)
Provides capability to communicate with
a Trane ICS
™
system.
Compressor Current Sensing (CSM)
This option measures and averages amp
draw on each compressor.
Unit Mounted Disconnect
Non-fused, factory installed, and located
inside the main control box, this
disconnect switch features an external
handle that allows the operator to
disconnect unit power without having to
open the control box door.
Isolators
Spring or neoprene-in-shear isolators
available for jobsite installation.
Superheat/Sub-Cooling
In place of externally mounted
refrigerant gauges, a module can be
ordered that will calculate and display on
the Human Interface (HI) each circuit’s
superheat and subcooling temperatures.
Hot Gas Bypass
Although unnecessary on scroll chillers
for comfort applications (due to scroll
cycling capabilities), hot gas bypass is
still available for applications requiring
close temperature control at low load
conditions.
Generic Building Automation System
(GBAS)
Two modules are available to integrate
building automation systems other than
Trane. The modules are designed for
either 0-5 vdc or 0-10 vdc signals.
Remote Human Interface (RHI) Panel
The Remote Human Interface Panel can
perform all the same functions as unit
mounted Human Interface Panel, with
the exception of the Service Mode.
The field installed RHI can monitor and
control up to 4 chillers. The RHI is
suitable for mounting inside a building,
up to 5,000 feet from the unit. The RHI is
wired to the IPCB mounted in each chiller
with a wire pair communication wiring
and 24V control wiring.
Remote Set point Potentiometer
Field installed option that allows remote
adjustment of the leaving solution set
point.
Zone Sensor (Chilled Solution Reset)
Field installed zone sensor that allows
the leaving chilled solution temperature
to be reset by the zone temperature.
Copper Fin Condenser Coils
Copper fins mechanically bonded to
seamless copper tubes are available for
use in corrosive atmospheres
Electronic Low Ambient Damper(s)
Allows the unit to operate down to 0°F
outdoor ambient conditions.
Inter-Processor Communication Bridge
(IPCB)
This module provides an amplified and
filtered version of the IPC link for
connection to a Remote Human Interface
(RHI) Panel. Each chiller that is tied into a
RHI must have a IPCB installed.
Other Options
In addition to all of these options, Trane
can offer in-house design for many
applications, including special coil
coating.
(20–60 Ton)Mechanical
Specifications