Ingersoll-Rand ReliaTel, Manual, Page: 10 / 176

10 RT-SVD03L-EN
General Information
ReliaTel ™ ™
ReliaTel ™ is not the name of a circuit board, but rather
an overall communicating control system consisting of
up to eight communicating modules.
ReliaTel ™ is the name given to the second generation
microprocessor controls developed by Trane ® .
ReliaTel
™
controls were first used in the 3 to 10 ton
convertible packaged cooling with electric heat, gas/
electric, and heat pumps. ReliaTel
™ has been added to
other commercial products. In April 2003, Voyager ™
12.5 to 25 tons dedicated units were converted to
ReliaTel
™ controls. In April 2004, ReliaTel ™ controls
were added to Voyager ™ Commercial 27.5 to 50 tons
dedicated units.
Precedent ™ ™ 3 to 10 Tons and Voyager ™ ™
12.5 to 50 Tons Dedicated Packaged
Rooftops
Precedent ™ 3 to 10 ton cooling only and gas/electric
convertible packaged units can be built with either
electromechanical or ReliaTel
™ controls. Voyager ™
12.5 to 50 ton units are built with ReliaTel ™ controls
only. All heat pumps are built exclusively with
ReliaTel
™ controls. This publication covers both
electromechanical and ReliaTel ™ controls. Due to the
more complex application and service opportunities,
greater emphasis is placed on units with ReliaTel
™
controls.
Odyssey ™ ™
Odyssey ™ 6 to 20 ton heat pumps are available with
ReliaTel ™ controls. Odyssey ™ 6 to 25 ton cooling only
units can be built with either electromechanical or
ReliaTel
™ controls.
ReliaTel ™ ™ vs. Electromechanical
N No otte e:: Each ReliaTel ™ module is a communicating
control.
Precedent ™ 3 to 10 tons packaged gas/electric (YSC,
YHC) and cooling only (TSC, THC) are available without
microprocessor controls. With electromechanical
controls, zone sensors cannot control the units, nor can
building automation systems communicate with it.
Electromechanical units require the use of a thermostat
or relay based control system to directly control relays,
contactors, etc. The ignition control and economizer
are different than the ones used with ReliaTel
™ .
Service information for these components are handled
separately in this book.
• ReliaTel ™ controls: 9th digit “R”
• Electromechanical controls: 9th digit “E”
• 27.5 to 50 tons: ReliaTel ™ controls 10th digit “M” or
greater
ReliaTel ™ ™ Refrigeration Module (RTRM)
Every ReliaTel ™ unit uses an RTRM. The RTRM
provides primary unit control for heating and cooling.
In addition, it has built-in logic that controls heating
and cooling staging, minimum run times, diagnostics,
heat pump defrost control, short cycle timing and
more. It can be controlled directly by any of the
following:
• Mechanical Zone Sensor Module (ZSM)
BAYSENS106-111*, AYSTAT106*-109*
• Programmable Zone Sensor (BAYSENS119*, 20*,
AYSTAT666*)
• Conventional thermostat BAYSTAT036-038* (or
similar, ASYSTAT701-703*)
N No otte e:: Unlike the previous Micro, a conventional
thermostat does not require any sort of
interface. It can be wired directly to the RTRM.
In addition, the unit can be controlled using Trane ® ICS
systems by applying the appropriate interface. The
RTRM is configured through the unit wiring harness.
The same module is used on gas/electric, cooling only
with electric heat, and heat pumps. The following
additional inputs are connected to the RTRM:
• Outdoor air sensor (OAS)
• Coil temperature sensor (CTS) heat pump only
• Smoke detector (unless it is factory installed) or
other shutdown device
ReliaTel
™ ™
Air Handler Module (RTAM)
The RTAM is the module required for unit with multi-
zone VAV function. The RTAM gets power from and
communicates with the RTRM via RS-485 bus. Any of
the following options to the ReliaTel
™ control devices
will require the use of a RTAM.
ReliaTel
™ ™
Air Handler Module (RTAM)
(Standard on VAV)
This module contains the VAV setpoint potentiometers
as well as the following inputs and outputs:
• DIP switch inputs for supply air reset, daytime
warm-up enable and IGV/VFD configuration
• Supply pressure transducer input inlet guide vane
(IGV) or variable frequency drive (VFD) output
• Ventilation heat relay (VHR) output
ReliaTel ™ ™ Option Module (RTOM)
N No otte e:: RTOM is standard on 27.5 to 50 Tons units.