ReliaTel Microprocessor Controls - Amick Racing

1 RT-SVD03A-ENApril 2003 ReliaTel Microprocessor Controls22 American Standard Inc. 20023 Table of ContentsIntroduction2-10 Ton Convertible Packaged Rooftops .. 5 ReliaTel .. 5 ReliaTel vs. Electromechanical .. 6 ReliaTel - Module Descriptions .. 6-7 Refrigeration Module Flow Diagram (RTRM)TSC, THC Electric Heat/No Heat .. 8 YSC, THC Gas Heating .. 9 WSC Heat Pump .. 10 Options Module (RTOM) .. 11 Economizer Module (ECA) .. 12 COMM3/4 Module for ICS Communications .. 13 Low Voltage Terminal Strip .. 14 Typical control Box Layout2-5 Tons .. 156-10 Tons .. 16 ReliaTel Refrigeration Module (RTRM)Layout .. 17 Board Connections .. 18 Diagnostics .. 19-23 ReliaTel ControlDefault Operation .. 24-25 ReliaTel Options Module (RTOM)Layout .. 26 Inputs .. 28 LED Functions .. 26 RTRM/RTOM Temperature Inputs .. 29-31 Protocol of Communications.

2 32 Test Mode .. 33-35 Thermostat andSensorsLayout .. 36 Sensor Descriptions .. 37 Sensor Diagrams .. 38-44 Zone Sensor (ZSM) Testing-Zone Temperature Input .. 45 Setpoint/Mode Inputs-Mechanical Zone Sensor Module .. 46-47 Zone Sensor Averaging .. 48 Operation with a Conventional Thermostat .. 49 Conventional Thermostat Operation .. 50-51 COMM 3/4 Interface Operation and Troubleshooting .. 52-53 Direct Spark Ignition control - Texas Instruments .. 54 Direct Spark Ignition control - Sequence of Operation .. 553 Gas Heat Specifications3-5 Tons Low Heat .. 563-5 Tons Medium Heat .. 573-5 Tons High Heat .. 586-10 Tons Low Heat .. 596-10 Tons Medium Heat .. 606-10 Tons High Heat .. 61 Heat Pump Demand Defrost .. 62-63 ReliaTel Economizer Module (ECA) Layout .. 644 Table of ContentsReliaTel Economizer Operation .. 65-70 ReliaTel Economizer Inputs.

3 71-72 ReliaTel Humidity Sensors .. 73 ReliaTel Economizer control actuator (ECA) LED Fault Code Information .. 74 Electromechanical Economizer Functions .. 75 Electromechanical Economizer Testing .. 76 Electromechanical Economizer - 3 Position Damper .. 77 ReliaTel control - Temporary Operation .. 78 ReliaTel Supply Air Tempering control .. 79C02 Sensor Connections for ReliaTel Units with Economizer .. 80 ReliaTel - Ventilation Override .. 81 ReliaTel Heating/Cooling Changeover .. 82 Electromechanical Unit - Sequence of Operation Time Delay Relay .. 83 Fan Off Delay Solid State Timer .. 84 Transformer Troubleshooting .. 87,88 Tables .. 8952-10 Ton Convertible Packaged Rooftops IntroductionTwo through ten ton cooling only and gas electric convertible packaged units can be built withelectromechanical Controls instead of ReliaTel Controls .

4 Heat pumps are built with ReliaTel Controls book will cover all styles, however most material relates to ReliaTel units due to more involvedapplication and service booklet does not cover all aspects of service. It assumes that the servicer is an experiencedcommercial service technician with a strong background in electrical Controls as well as DC circuits. If youare not well experienced in HVAC service, do not attempt to use this manual to service equipment. Doingso could endanger yourself or others, as well as cause expensive equipment or property is not the name of a circuit board, but rather an overall communicating control system consistingof up to five communicating modules. The next section covers various aspects of ReliaTel andElectromechanical IntroductionReliaTel is the name given to the second generation Microprocessor Controls developed byTrane/American first usage of ReliaTel control is in the 2-10 ton convertible packaged cooling with electric heat, gaselectric, and heat pump.

5 Eventually, ReliaTel will be applied in other commercial products as 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 greater flexibilitythan conventional systems. ReliaTel has even more flexibility, is more compact, has additional systemreliability enhancements and of what ReliaTel does will be very familiar to service technicians accustomed to The Micro. Testingand troubleshooting is similar, and in many cases the same as The Micro. There are, however, somesignificant differences, so it is important that the servicer use the correct material for the unit vs. ElectromechanicalTwo through ten ton convertible packaged gas/electric (YSC, YHC) and cooling only (TSC, THC) are availablewithout Microprocessor With electromechanical Controls , zone sensors cannot control the units,nor can building automation systems communicate with it.

6 Electromechanical units require the use of athermostat or relay based control system to directly control relays, contactors, etc. The ignition control andeconomizer are different than the ones used with ReliaTel . Service information for these components arehandled separately in this :1. ReliaTel Controls : 9th digit R Electromechanical Controls : 9th digit E ReliaTel Module DescriptionsEach ReliaTel Module is a communicating Refrigeration Module (RTRM)Every ReliaTel unit uses an RTRM. The RTRM provides primary unit control for heating and cooling. Inaddition, 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 thefollowing:Zone Sensor Module (BAYSENS006-11B, AYSTAT661-664B)Programmable Zone Sensor (BAYSENS019B, AYSTAT666B)Conventional Thermostat (such as BAYSTAT036-038A, ASYSTAT701-703)Note: Unlike the previous micro, a conventional thermostat does not require any sort of interface.

7 It can bewired directly to the addition, the unit can be controlled using Trane ICS systems by applying the appropriate interface. TheRTRM is configured through the unit wiring harness. The same module is used on gas/electric, coolingonly 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 onlySmoke detector (unless it is factory installed) or other shutdown outlines on pages 8-10 ReliaTel Options Module (RTOM)The RTOM gets power from and communicates with the 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 InstalledNote: A factory installed Smoke Detector provides instant shutdown and ICS alarm Outline on page 11 Economizer actuator w/ Module (ECA)The economizer can be used with or without the Options module.

8 The actuator has a detachablecommunicating module, which can be replaced separately. The outdoor air sensor connected to the RTRM provides outdoor temperature information for the changeover ECA accepts the following inputs:Mixed Air Sensor (MAS)Return Air Sensor (RAS) for comparative enthalpy or ICS input dataOutdoor Humidity Sensor (OHS) for reference or comparative enthalpyReturn Air Humidity Sensor (RHS) for comparative enthalpyCO2 Sensor 0-10 VDC inputRemote Minimum Potentiometer (RMP)The Power Exhaust relay is connected to the ECA module as outline on page 12 COMM3/4 Communication InterfaceAllows ICS communication between a ReliaTel unit and Trane ICS systems as follows:Tracer 100 seriesTracer SummitTr a ck e rComforTracVariTrac 1 (Comfort Manager)VariTrac 2 (Central control Panel)LonTalk (Comm5) Communication InterfaceAllows ICS communication between a ReliaTel unit and future Tracker 2 and (LonTalk) COMM 5communication applications.

9 Not available for general distribution High temperature thermostats .. 44 Zone sensor modules .. 37-43 Power exhaust .. 65 Averaging .. 45 ASYSTAT661B .. 38 ASYSTAT662B .. 38 ASYSTAT663B .. 39 ASYSTAT664B .. 39 ASYSTAT666B .. 43 ASYSTAT669A .. 42 BAYSENS006B .. 38 BAYSENS007B .. 38 BAYSENS008B .. 39 BAYSENS009B .. 39 BAYSENS010B .. 40 BAYSENS011B .. 40 BAYSENS013C .. 41 BAYSENS017B .. 42 BAYSENS019B .. 43 Board Layout .. 26 Barometric Relief .. 74, 80 Clogged Filter switch .. 27CO2 input .. 64CO2 wiring .. 80 Coil Temperature .. 7 COMM 3 / 4 Communication Interface .. 7 COMM 3 / 4 description .. 7 COMM 3 / 4 flow diagram .. 13 COMM 3/ 4 Troubleshooting .. 7,52 COMM 5 .. 66 Communication protocol .. 32 Comparative Enthalpy .. 68 Component Relationships .. 13 COMM 3 / 4 ICS module (RTCI) .. 13 economizer module (ECA).

10 12 options module (RTOM) .. 11 heat pump (RTRM) .. 10 gas heat (RTRM) .. 9 electric/no heat (RTRM) .. 8 Compressor 1 disable .. 14 Compressor 2 disable .. 14 control Box Layout 2-5 ton .. 15 control Box Layout6-10 ton .. 16 control inputs .. 32 Conventional thermostat .. 49 Conventional thermostat connections .. 50 Conventional thermostat economizer .. 51 Conventional thermostat heating .. 51 Conventional thermostat operation .. 50 Conventional thermostat heatpump .. 50 Cooling setpoint (resistance/voltage) .. 46 Dip switches .. 53 Default operation .. 24,25 Defrost mode operation .. 62 Defrost service test .. 62 Defrost termination temperature .. 62 Demand defrost .. 62 Demand defrost diagnostics .. 63 Direct spark ignition .. 54 Discharge air .. 42 Dry bulb/reference point selection .. 68 Economizer - ReliaTel barometric.