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Unit Nameplate
A Mylar unit nameplate is located on the
unit's corner support next to the filter ac-
cess panel. It includes the unit model
number, serial number, electrical charac-
teristics, refrigerant charge, as well as
other pertinent unit data.
Compressor Nameplate
The nameplate for the compressors are
located on the side of the compressor.
Hazard Identification
Warnings are provided throughout
this manual to indicate to installing
contractors, operators, and service
personnel of potentially hazardous
situations which, if not avoided,
COULD result in death or serious in-
jury.
Cautions are provided throughout
this manual to indicate to installing
contractors, operators, and service
personnel of potentially hazardous
situations which, if not avoided, MAY
result in minor or moderate injury.
T_C-IOM-2A
General Information
Unit Description
Before shipment, each unit is leak tested,
dehydrated, charged with refrigerant and
compressor oil, and run tested for proper
control operation.
The condenser coils are aluminum fin,
mechanically bonded to copper tubing.
Direct-drive, vertical discharge condenser
fans are provided with built-in thermal
overload protection.
The ReliaTel™ Control Module is a mi-
croelectronic control system that is re-
ferred to as "Refrigeration Module"
(RTRM). The acronym RTRM is used
extensively throughout this document
when referring to the control system net-
work.
The module through Proportional/Integral
control algorithms perform specific unit
functions that governs unit operation in re-
sponse to; zone temperature, supply air
temperature, and/or humidity conditions
depending on the application. The
stages of capacity control for these units
are achieved by starting and stopping
the compressors.
The RTRM is mounted in the control
panel and is factory wired to the respec-
tive internal components. The RTRM re-
ceives and interprets information from
other unit modules, sensors, remote pan-
els, and customer binary contacts to sat-
isfy the applicable request for cooling.
Economizer Control Actuator
(Optional)
ReliaTel™ Control
The ECA monitors the mixed air tem-
perature, return air temperature, minimum
position setpoint (local or remote),
power exhaust setpoint, CO2 setpoint,
CO2, and ambient dry bulb/enthalpy
sensor or comparative humidity (return air
humidity against ambient humidity) sen-
sors, if selected, to control dampers to an
accuracy of +/- 5% of stroke. The actuator
is spring returned to the closed position
any time that power is lost to the unit. It is
capable of delivering up to 25 inch
pounds (2.82 N-m) of torque and is
powered by 24 VAC.
RTCI -- ReliaTel™ Trane
Communication Interface
(Optional)
This module is used when the application
calls for an ICS
TM
building management
type control system. It allows the control
and monitoring of the system through an
ICS panel. The module can be ordered
from the factory or ordered as a kit to be
field installed. Follow the installation in-
struction that ships with each kit when field
installation is necessary.
RLCI - ReliaTel™ LonTalk
Communication Interface
(Optional)
This module is used when the application
calls for an ICS
TM
building management
type control system that is LonTalk. It al-
lows the control and monitoring of the
system through an ICS panel. The mod-
ule can be ordered from the factory or or-
dered as a kit to be field installed. Follow
the installation instruction that ships with
each kit when field installation is neces-
sary.
RTOM – ReliaTel™ Options
Module (Optional)
The RTOM monitors the supply fan
proving, clogged filter, supply air tem-
perature, exhaust fan setpoint, supply air
tempering, Frostat™ and smoke detec-
tor. Refer to system input devices and
functions for operation.
5
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