ReliaTel Microprocessor Controls 3 To 10 Ton Convertible .
Diagnostic ManualReliaTel Microprocessor ControlsNovember 2010RT-SVD03G-EN
Introduction3 to 10 ton Convertible and 12½ to 50 ton Dedicated Packaged Rooftops3 to 10 ton cooling only and gas electric convertible packaged units can be built with eitherelectromechanical or ReliaTel controls. 12½ to 50 ton units are built with ReliaTel controls only.All Heat pumps are built exclusively with ReliaTel controls. This publication covers bothelectromechanical and ReliaTel controls. Due to the more complex application and serviceopportunities, greater emphasis is placed on units with ReliaTel controls.This publication does not cover all aspects of service. It assumes that the service person is anexperienced commercial service technician with a strong background in electrical controls and DCcircuits. If you are not experienced and fully qualified in HVAC service, do not attempt to use thismanual to service equipment. Doing so could cause personal injury to yourself or others and couldresult in expensive equipment or property damage.ReliaTel IntroductionReliaTel is not the name of a circuit board, but rather an overall communicating control systemconsisting 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 3-10 ton convertible packaged cooling with electric heat, gaselectric, and heat pumps. ReliaTel has been added to other commercial products as well. In April2003, 12½-25 ton dedicated units were converted to ReliaTel controls. In April 2004, ReliaTelcontrols were added to 27½ to 50 ton dedicated unitsWhy change?The Micro has proven itself to our customers in thousands of applications around the world. Amicroprocessor based unit provides superior comfort, unmatched reliability and much greaterflexibility than conventional systems. ReliaTel has even more flexibility, is more compact, hasadditional system reliability enhancements and more.Much of what ReliaTel does will be very familiar to service technicians accustomed to the previousgeneration Micro. Testing and troubleshooting is similar, and in many cases the same. There are,however, some significant differences, so it is important that the service person use the correctmaterial for the unit being serviced. 2010 Trane All rights reservedRT-SVD03G-EN
Table of ContentsIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 to 10 ton Convertible and 12½ to 50 ton Dedicated Packaged Rooftops 2ReliaTel Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Why change? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9ReliaTel vs. Electromechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9ReliaTel – Module Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Module Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Low Voltage Terminal Strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Typical Control Box Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21ReliaTel Refrigeration Module (RTRM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25RTRM Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2627½ to 50 Ton Unit Additional Diagnostics (VAV only) . . . . . . . . . . . . . . . . . 33Default Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34ReliaTel Option Module (RTOM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36RTOM Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36RTOM Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Setpoint Potentiometers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38ReliaTel Ventilation Module (RTVM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41RTVM Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41RTVM Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Setpoint Potentiometers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42ReliaTel Dehumidification Module (RTDM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43RTDM Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43RTDM Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Verifying Proper Air Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Units with Direct Drive Indoor Fan with MMC . . . . . . . . . . . . . . . . . . . . . . . . . 44ReliaTel LED Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45ReliaTel Refrigeration Module (RTRM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Green System LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Green Transmit LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Yellow Receive LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45ReliaTel Options Module (RTOM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Green system LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45ReliaTel Ventilation Module (RTVM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Green system LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45RT-SVD03G-EN3
ReliaTel Air Handling Module (RTAM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Green system LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45ReliaTel Dehumidification Module (RTDM) . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Green system LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Economizer Actuator Module (ECA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Green system LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Ignition Control (IGN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Green . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46TCI COMM3/4 Interface (Tracer, VariTrac) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47Yellow RX (Receive) LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47Green TX (Transmit) LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47LCI (LonTalk) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47LED1 Green MODBUS LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .LED4 Green LCI status LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .LED2 Red Service LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .LED3 Yellow Comm RX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47474747ReliaTel Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48Protocol of Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48Service Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Auto-Cycle Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Resistance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Step Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48484949Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50Service Tips: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50Thermostats and Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55High Temperature sensor Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73Operation with a Conventional Thermostat (Constant Volume) . . . . . . . . . . . . 74Zone Sensor Module Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78Mechanical Zone Sensor Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78Temperature input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78Setpoint input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79Mode Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80Programmable Zone Sensor BAYSENS119Aand BAYSENS019C (Obsolete) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81RTRM/RTOM (Temperature Inputs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83Outdoor Air Sensor, Discharge Air Sensor, Coil Temperature Sensor . . 83Zone Sensor Averaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85COMM3/4 Interface Operation & Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . 86Wiring: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 864RT-SVD03G-EN
LED’s: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86Communication problems: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86Direct Spark Ignition Control (Texas Instruments, 3-10 Ton Units only) . . . . . 88Direct Spark Ignition Control (Sequence of Operation, 3-10 Ton Units Only) 891-stage units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 892-stage units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89ReliaTel Hot Surface Ignition Control (12.5 - 50 Ton 1 Stage, 2 Stage, and Modulating Gas Heat) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90Ignition Control Module Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90Sequence of Operations (1 and 2 heat units) . . . . . . . . . . . . . . . . . . . . . . 91Heat Pump Demand Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93Defrost Service Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Defrost Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Emergency Heat Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Diagnostic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Independent Circuit Defrost Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .939394949495ReliaTel Economizer Module Layout (Honeywell) . . . . . . . . . . . . . . . . . . . . . . . . . 96ReliaTel Economizer Layout (RTEM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97ReliaTel Economizer Actuator Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98ReliaTel Economizer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99Customer Benefit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99VAV Economizer Cooling Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99Economizer Operation with Zone Sensor,Programmable Zone Sensor or ICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100Economizer Operation with Conventional Thermostat (CV only) . . . . . . . . 100Barometric Relief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100Power Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101Economizer Control Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101Thermostat Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101Economizer Damper Enthalpy Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103Economizer Operation Enthalpy Changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104Dry bulb/Reference Point Selections . . . . . . . . . . . . . . . . . . . . . . . . . . . .Comparative Enthalpy Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Reference Enthalpy Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Reference Dry Bulb Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Internal Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104104104105105ReliaTel Economizer Operation & Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106RT-SVD03G-EN5
ReliaTel Economizer Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Economizer Actuator Module W7340A1004 (used prior to 08/1/05) . . .Service Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Economizer Actuator Module W7340B1002 (08/01/05 and later) . . . . .106106106107ReliaTel Economizer Control Actuator (LED Fault Code Info.) . . . . . . . . . . . . . 108Actuator Fault (Honeywell) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108Actuator Fault (RTEM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108Sensor Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108ReliaTel Humidity Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109To Test Humidity Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109Space Pressure Control with Statitrac (27.5-50 Tons) . . . . . . . . . . . . . . . . . . . . . 111Description of Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111Exhaust Fan Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Sensor and Setpoint Arbitration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Space Pressure Zero Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Exhaust Damper Output Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Failure and Override Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . .111111111111112Electromechanical Economizer Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113Electromechanical Economizer Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114Electromechanical Mixed Air Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114Service Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114Electromechanical Economizer (3 Position Damper) . . . . . . . . . . . . . . . . . . . . . 115ReliaTel Control Temporary Operation 3-25 tons . . . . . . . . . . . . . . . . . . . . . . . . 116ReliaTel Supply Air Tempering Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117Enable Supply Air Tempering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117Constant Volume Units with Staged Heat . . . . . . . . . . . . . . . . . . . . . . . . 117Variable Air Volume Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117Discharge Air Sensing with TCI Comm3/4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1183-25 Ton Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11827.5-50 Tons units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118CO2 Sensor Connections(ReliaTel Units with Demand Controlled Ventilation) . . . . . . . . . . . . . . . . . . . . . 119Demand Controlled Ventilation (DCV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119RTEM Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119RTEM w/ RTRM v8.0 and Later . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119RTEM w/ RTRM v7.0 and Earlier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121Honeywell Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122Voyager 27.5 - 50 tons VAV Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1226RT-SVD03G-EN
ReliaTel Ventilation Override . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124Dehumidification with Hot Gas Reheat (3-25 Tons) . . . . . . . . . . . . . . . . . . . . . . 125Sequence of Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125Modulating Dehumidification with Hot Gas Reheat (27.5-50 Tons) . . . . . . . . 128Controls Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128Heating/Cooling Changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131Low Ambient Mechanical Cooling Operation (3-25 Ton Units) . . . . . . . . . . . . 132Evaporator Defrost Control (EDC) Function . . . . . . . . . . . . . . . . . . . . . . 132ReliaTel Condenser Fan Control Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13312.5 – 25 Ton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13327.5 – 50 Ton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133Condenser Fan Sequencing Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133Odyssey Independent Circuit Heat Pump Condenser Fan Control . . . . . . . 134Phase Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1353 – 25 Ton ReliaTel Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135Electromechanical Time Delay Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136Time Delay Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136Fan “Off” Delay Solid State Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136Snubber Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137Transformer Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138Transformer Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138High Pressure and Low Pressure Lockout Circuits . . . . . . . . . . . . . . . . . . . . . . . 139LPC Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139LPC Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139LPC Operation for 27.5-50T Units with Modulating Reheat . . . . . . . . . . 139HPC Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141HPC Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141Novar Controls (Sequence of Operation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142Novar Controls Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cooling with an Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cooling without an Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Economizer Set-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142142142143Novar Controls Checkout/Troubleshooting Procedure . . . . . . . . . . . . . . . . 143General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143Checkout Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143Voyager Commercial 27½ to 50 Tons CV and VAV . . . . . . . . . . . . . . . . . . . . . . . 146RT-SVD03G-EN7
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Constant Volume (CV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Variable Air Volume (VAV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RTRM - ReliaTel Refrigeration Module - (standard) . . . . . . . . . . . . . . . .RTOM - ReliaTel Options Module - (standard) . . . . . . . . . . . . . . . . . . . .RTAM - ReliaTel Air Handler Module - (standard on VAV) . . . . . . . . . .ECA - Economizer Actuator - (optional) . . . . . . . . . . . . . . . . . . . . . . . . . .TCI - Trane Communication Interface - (optional) . . . . . . . . . . . . . . . . .LCI - LonTalk Communication Interface (optional) . . . . . . . . . . . . . . . . .IGN - Ignition Control Module (YC* only) . . . . . . . . . . . . . . . . . . . . . . . .Configuration Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Supply Duct Static Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . . .Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .VHR Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Application Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .BAYSENS021A Setpoint Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Remote Setpoint Inputs on RTAM J7: . . . . . . . . . . . . . . . . . . . . . . . . . . 52153Outdoor Air Flow Compensation for VAV Units . . . . . . . . . . . . . . . . . . . . . . . . . . 158Outdoor Airflow Compensation (27½ - 50 Ton VAV only) . . . . . . . . . . . 158Set up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158Operation for RTRM 7.0 and Earlier with RTEM or Any RTRM with Honeywell ECA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158Operation for RTRM 8.0 and Later with RTEM . . . . . . . . . . . . . . . . . . . . 159Software Change History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1648RT-SVD03G-EN
General InformationReliaTel vs. ElectromechanicalThree to ten ton convertible packaged gas/electric (YSC, YHC) and cooling only (TSC, THC) areavailable without microprocessor controls. With electromechanical controls, zone sensors cannotcontrol the units, nor can building automation systems communicate with it. Electromechanicalunits 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” 27.5-50 Ton: ReliaTel controls 10th digit “M” or greater.ReliaTel – Module DescriptionsEach ReliaTel Module is a communicating control.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 directlyby any of the following: Zone Sensor Module (BAYSENS006-11B, AYSTAT661-664B). Programmable Zone Sensor (BAYSENS019*, 20*, AYSTAT666*). Conventional Thermostat (such as BAYSTAT036-038A, ASYSTAT701-703).Note: 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 appropriateinterface. The RTRM is configured through the unit wiring harness. The same module is used ongas/electric, cooling only with electric heat, and heat pumps. The following additional inputs areconnected 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 Option Module (RTOM)The RTOM gets power from and communicates with the RTRM.Any of these optional ReliaTel devices require the use of an RTOM: Frostat (FOS). Clogged Filter Switch (CFS). Fan Failure Switch (FFS). Discharge Air Sensor (DAS) used for supply air tempering and ICS input data. Smoke Detector, Factory Installed (A factory-installed Smoke Detector provides instantshutdown and ICS alarm output.)Note: On 27.5-50 Ton Units RTOM is standard.RT-SVD03G-EN9
General InformationReliatel Ventilation Module (RTVM)The RTVM is a module required for units configured with Space Pressure Control with Statitrac. Themodule controls the Exhaust Damper Position 0-10Vdc output as well as the Space Pressure Sensorcalibration routine. The module accepts the following inputs: Statitrac Configuration. Space Pressure Input. Space Pressure Setpoint. Space Pressure Setpoint Deadband.Reliatel Dehumidification Module (RTDM)The RTDM is a module required for units configured with Modulating Dehumidification. Themodule controls Modulating Cooling and Reheat valves as well as the Reheat Circuit PumpoutSolenoid. The module accepts the following inputs: Reheat Circuit Entering Evaporator Temperature. Reheat Circuit Low Pressure Cutout Input.Economizer Actuator w/ Module (ECA or RTEM)The economizer can be used with or without the Options module. The actuator has a detachablecommunicating module, which can be replaced separately. The outdoor air sensor, connected tothe RTRM, provides outdoor temperature information for the changeover decision.The ECA accepts the following inputs: Mixed Air Sensor (MAS). Return Air Sensor (RAS) for comparative enthalpy or ICS input data. Outdoor Humidity Sensor (OHS) for reference or comparative enthalpy. Return Air Humidity Sensor (RHS) for comparative enthalpy. CO2 Sensor 0-10VDC input. Remote Minimum Potentiometer (RMP). Active/Passive DCV Configuration Input (RTEM only). The Power Exhaust relay is connected to the ECA module as well.COMM3/4 Communication InterfaceAllows ICS communication between a ReliaTel unit and Trane ICS systems as follows: Tracer 100 series Tracer Summit Tracker ComforTrac VariTrac 1 (Comfort Manager) VariTrac 2 (Central Control Panel)LonTalk Communication InterfaceAllows Building Management System (BMS) communication to a ReliaTel unit. There are 2 LCIversions, one for SCC control (constant volume units) and one for DAC control (VAV units).10RT-SVD03G-EN
Module Flow DiagramFigure 1. TSC/THC Refrigeration Module (RTRM) Electric Heat/No HeatUnit Control, Select oneTS/H Refrigeration ModuleZone SensorMechanical4 Zone Sensor Inputs (AIP)4 OutputsLED or indicationsNon Heat Pump Config (BIP)ThermostatG Y1 Y2 W1R C/B1 Compressor Config (BIP)1 Stage Heat Config (BIP)4 Thermostat inputs (BIP)Zone SensorProgrammable3 to 7 wire Communicating ZSMIndoor Fan Output (BOP)COMM 3/4CommunicationInterfaceIDFMODBUS CommunicationCompressor 1 Output (BOP)CC1Compressor 1 Proving (BIP)Compressor 1 Disable ncy Stop (BIP)Electric Heat 1st StageElectricHeat 1Electric Heat 2nd StageElectricHeat 2Service Test input (BIP)ResistorOutdoor Air Temp (AIP)Sensor24 VACPowerLEDs: System TX, RXRT-SVD03G-EN11
Module Flow DiagramRTRMFigure 2. Refrigeration Module (RTRM) Gas HeatingUnit Control, Select oneYS/H Refrigeration Module4 Zone Sensor Inputs (AIP)Zone SensorMechanical4 Outputs
ReliaTel is the name given to the second generation microprocessor controls developed by Trane. ReliaTel controls were first used in the 3-10 ton convertible packaged cooling with electric heat, g
Microprocessor-Based System with Buses: Address, Data, and Control Microprocessor-based Systems Microprocessor ! The microprocessor (MPU) is a computing and logic device that executes binary instructions in a sequence stored in memory. ! Characteristics: " General purpo
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† Economizer with reference enthalpy control † Economizer with differential (comparative) enthalpy control . Quality and Reliability are enhanced through ReliaTel control and logic: † prevents the unit from short cycling, considerably improving compressor life. . When applied with ReliaTel, this module
Indoor Motor or Single Zone VAV, 10 Ton with Multi-Speed Indoor Motor or Single Zone VAV Units Parts List that must be Ordered from Trane to work with CanFab CO2 Kit (1) ReliaTel Ventilation Module (RTVM) X13651517 (1) ReliaTel
1 Introduction to Microcomputer Microcomputer architecture, organization and its operation. Difference between Microprocessor and Microcontroller. 1 [1] Lecture Notes Introduction to Microprocessor Evolution of Microprocessor, General Architecture, system bus 2 [1] [2] Lecture Notes 2 Functional units of Microprocessor
36 Chapter 3 Microprocessor Types and Specifications Pre-PC Microprocessor History The brain or engine of the PC is the processor (sometimes called microprocessor), or central processing u
A microprocessor can move data from one memory location to another. A microprocessor can make decisions and jump to a new set of instructions based on those decisions. There may be very sophisticated things that a microprocessor
the topic of artificial intelligence (AI) in English law. AI, once a notion confined to science fiction novels, movies and research papers, is now making a tremendous impact on society. Whether we are aware of it or not, AI already pervades much of our world, from its use in banking and finance to electronic disclosure in large scale litigation. The application of AI to English law raises many .
