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WC-IOM-7 • Packaged Heat Pump 7
Unit Nameplate
A Mylar unit nameplate is located on the unit’s corner support next to the control
box. It includes the unit model number, serial number, electrical characteristics,
refrigerant charge, as well as other pertinent unit data.
Compressor Nameplate
The nameplate for the compressors are located on the side of the compressor.
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 microelectronic control system that is referred
to as “Refrigeration Module” (RTRM). The acronym RTRM is used extensively
throughout this document when referring to the control system network.
This module through Proportional/Integral control algorithms perform specific
unit functions that governs unit operation in response 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 respective
internal components. The RTRM receives and interprets information from other
unit modules, sensors, remote panels, and customer binary contacts to satisfy
the applicable request for cooling.
Economizer Control Actuator ReliaTel™ Control
The ECA monitors the mixed air temperature, 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) sensors, 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 of torque and is powered by 24 VAC.
RTCI -- ReliaTel™ Trane Communication Interface (Optional)
This module is used when the application calls for an ICSTM 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
General Information