RT-SVX25C-EN
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General Information
CAUTION
Ultraviolet (UV) Lights!
The manufacturer does not recommend field installation of ultraviolet lights in its equipment for
the intended purpose of improving indoor air quality. High intensity C-band ultraviolet light is
known to severely damage polymer (plastic) materials and poses a personal safety risk to
anyone exposed to the light without proper personal protective equipment. Polymer materials
commonly found in HVAC equipment that may be susceptible include insulation on electrical
wiring, fan belts, thermal insulation, various fasteners and bushings. Degradation of these
materials can result in serious damage to the equipment.
The manufacturer accepts no responsibility for the performance or operation of our equipment
in which ultraviolet devices were installed outside of the manufacturer’s factory or its approved
suppliers.
NOTICE
Roof Damage!
System contains oil and refrigerant under high pressure. Roofs should be protected from
exposure to oils and refrigerant in the system. If rooftop is not protected damage to the roof may
occur.
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 Economizer Control Actuator.
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
