Trane ReliaTel Diagnostic User guide

Download

Page 1

Diagnostic Manual

ReliaTel™ Microprocessor Controls

November 2010 RT-SVD03G-EN

Page 2

Introduction

3 to 10 ton Convertible and 12½ to 50 ton Dedicated Packaged Rooftops

3 to 10 ton cooling on ly and gas electric convertible packaged units can be built with eit her electromechan ical or ReliaTel ™ controls. 12½ to 50 ton u nits are built with ReliaTel controls only. All Heat pumps are built ex clusively with ReliaTel cont rols. This pu blication covers both electromechanical and ReliaTel controls. Due to t he m ore comp lex application and ser vi ce opportunities, greater em phasis i s placed on units with ReliaTel controls.

This publi cation does not cover all aspects of service. It assu mes that the service person is an experienced com mercial service technician w ith a strong backgro und in electri cal control s and DC circuits. If you are not experienced and full y qualified i n HVAC service, do not attem pt to use this m anual to ser vice eq uipment. Doing so coul d cause p erson al injury t o yo ursel f or others and coul d result in expensive equipm ent or property damage.

ReliaTel Introduction

ReliaTel is not the nam e of a circui t board, but r ather an overall com m unicating control system consisting of up to eight com m unicating modu les.

ReliaTel is the name gi ven to the second generation mi croprocessor controls developed by Trane.

ReliaTel co ntrols were fi rst u sed in the 3-10 to n conv ertib le packaged coolin g with electric heat, gas electric, and heat p um ps. Reli aTel has been added to other com m erci al products as well. In Apri l 2003, 12½-25 ton dedicated units w ere converted to ReliaTel controls. In April 2004, ReliaTel controls were added t o 27½ to 50 ton dedicated unit s

Why change?

The M icro has pr oven itself to our cust om ers in thousan ds of appli cations around the worl d. A microprocessor based uni t p rovides superior com fort, un m atched rel iability and m uch g reat er flexibilit y than convention al system s. ReliaTel has even m ore flexibil ity, is m ore com pact, has additional sy stem reliability enhancem en ts and m ore.

Much of w hat ReliaTel does will be very fam iliar to servi ce technicians accustomed to the previous generation M icro. Testing and troubleshooting is sim ilar, an d in m any cases th e same. There are, however, some si gnificant differences, so it is important that the service person use the corr ect material for the unit being serviced.

Page 3

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Module Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Low Voltage Term inal Strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Typical Control Box Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

ReliaTel Refrigeration M odule (RTRM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

RTRM Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

27½ to 50 Ton Unit Additional Diagnostics (VAV only) . . . . . . . . . . . . . . . . . 33

Default Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

ReliaTel Option Module (RTOM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

RTOM Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

RTOM Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Setpoint Potentiometers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3 to 10 ton Convertible and 12½ to 50 ton Dedicated Packaged Rooftops 2

ReliaTel Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Wh y change? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

ReliaTel vs. Electrom echanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

ReliaTel – Module Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

ReliaTel Ventilation M odule (RTVM ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

RTVM Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

RTVM Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Setpoint Potentiometers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

ReliaTel Dehum idification M odule (RTDM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

RTDM Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

RTDM Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Verifying Proper Air Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Units w ith Direct Drive Indoor Fan w ith M M C . . . . . . . . . . . . . . . . . . . . . . . . . 44

ReliaTel LED Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

ReliaTel Refrigeration M odule (RTRM ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Green System LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Green Transm it LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Yell ow Receive LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

ReliaTel Options Module (RTOM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Green system LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

ReliaTel Ventilation M odule (RTVM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Green system LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

RT-SVD03G-EN 3

Page 4

ReliaTel Air Handling Module (RTAM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Green system LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

ReliaTel Dehumidification Module (RTDM) . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Green system LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Economizer Actuator Module (ECA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Green system LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Ignition Control (IGN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Green . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

TCI COM M3/4 Interf ace (Tracer, VariTrac) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Yell ow RX (Receive) LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Green TX (Transmit) LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

LCI (LonTalk) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

LED1 Green MODBUS LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

LED4 Green LCI status LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

LED2 Red Ser vice LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

LED3 Yellow Com m RX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

ReliaTel Test M ode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Protocol of Com munications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Service Test M ode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Auto-Cycle Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Resistance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Step Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Test M ode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Service Tips: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Therm ostats and Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

High Temperature sensor Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Operation w ith a Conventional Therm ostat (Constant Volume) . . . . . . . . . . . . 74

Zone Sensor Module Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Mechanical Zone Sensor Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Temperature input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Setpoint input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Mode Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Program mable Zone Sensor BAYSENS119A

and BAYSENS019C (Obsolete) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

RTRM /RTOM (Temperature Inputs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Outdoor Air Sensor, Discharge Air Sensor, Coil Temperature Sensor . . 83

Zone Sensor Averaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

COMM 3/4 Interface Operation & Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . 86

Wiring: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

4 RT-SVD03G-EN

Page 5

LED’s: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Communication problem s: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Direct Spark Ignition Control (Texas Instruments, 3-10 Ton Units only) . . . . . 88

Direct Spark Ignition Control (Sequence of Operation, 3-10 Ton Units Only) 89

1-stage units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

2-stage units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

ReliaTel Hot Surface Ignition Control (12.5 - 50 Ton 1 Stage, 2 Stage, and M od-

ulating Gas Heat) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Ignition Control Module Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Sequence of Operations (1 and 2 heat units) . . . . . . . . . . . . . . . . . . . . . . 91

Heat Pum p Dem and Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Defrost Service Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Defrost M od e Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Emergen cy Heat Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Diagnostic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Indepen den t Circuit Defrost Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

ReliaTel Econom izer Module Layout (Honeywell) . . . . . . . . . . . . . . . . . . . . . . . . . 96

ReliaTel Econom izer Layout (RTEM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

ReliaTel Econom izer Actuator Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

ReliaTel Econom izer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Custom er Benefit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

VAV Econom izer Cooling Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Economizer Operation with Zone Sensor,

Program m able Zone Sensor or ICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Economizer Operation with Conventional Therm ostat (CV only) . . . . . . . . 100

Barometric Relief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Power Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Economizer Control M ethods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Thermostat Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Economizer Dam per Enthalpy Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Economizer Operation Enthalpy Changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Dry bulb/Reference Point Selections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Comparative Enthalpy Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Reference Enthalpy M ethod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Reference Dry Bulb Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Internal Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

ReliaTel Econom izer Operation & Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

RT-SVD03G-EN 5

Page 6

ReliaTel Economizer Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Economizer Actuator M odule W7340A1004 (used prior to 08/1/05) . . . 106

Service Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Economizer Actuator M odule W7340B1002 (08/01/05 and later) . . . . . 107

ReliaTel Econom izer Control Actuator (LED Fault Code Info.) . . . . . . . . . . . . . 108

Actuator Fault (Honeywell) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Actuator Fault (RTEM ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Sensor Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

ReliaTel Humidity Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

To Test Hum i di ty Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Space Pressure Control w ith Statitrac (27.5-50 Tons) . . . . . . . . . . . . . . . . . . . . . 111

Description of Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Exhaust Fan Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Sensor and Setpoint Arbitration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Space Pressure Zero Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Exhaust Damper Output Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Failure and Override M odes of Operation . . . . . . . . . . . . . . . . . . . . . . . . 112

Electrom echanical Economizer Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Electrom echanical Economizer Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Electrom echanical Mixed Air Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Service Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Electrom echanical Economizer (3 Position Dam per) . . . . . . . . . . . . . . . . . . . . . 115

ReliaTel Control Temporary Operation 3-25 tons . . . . . . . . . . . . . . . . . . . . . . . . 116

ReliaTel Supply Air Tem pering Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Enable Supply Air Tem pering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Constant Volum e U nits with Staged Heat . . . . . . . . . . . . . . . . . . . . . . . . 117

Variabl e Air Volum e Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Discharge Air Sensing with TCI Com m 3/4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

3-25 Ton Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

27.5-50 Tons units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

CO2 Sensor Connections

(ReliaTel Units w ith Demand Controlled Ventilation) . . . . . . . . . . . . . . . . . . . . . 119

Demand Controlled Ventilation (DCV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

RTEM Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

RTEM w / RTRM v8.0 and Later . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

RTEM w / RTRM v7.0 and Earlier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Honeywell Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Voyager 27.5 - 50 tons VAV Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

6 RT-SVD03G-EN

Page 7

ReliaTel Ventilation Override . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Dehumidification w ith Hot Gas Reheat (3-25 Tons) . . . . . . . . . . . . . . . . . . . . . . 125

Sequence of Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Modulating Dehum idification with Hot Gas Reheat (27.5-50 Tons) . . . . . . . . 128

Controls Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Heating/Cooling Changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Low Am bient Mechanical Cooling Operation (3-25 Ton Units) . . . . . . . . . . . . 132

Evaporator Defrost Control (EDC) Functi on . . . . . . . . . . . . . . . . . . . . . . 132

ReliaTel Condenser Fan Control Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

12.5 – 25 Ton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

27.5 – 50 Ton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Condenser Fan Sequencing Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Odyssey Independent Circuit Heat Pump Condenser Fan Control . . . . . . . 134

Phase Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

3 – 25 Ton ReliaTel Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Electrom echanical Tim e Delay Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Tim e Delay Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Fan “ Off” Delay Sol id State Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Snubber Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Transformer Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Transform er Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

High Pressure and Low Pressure Lockout Circuits . . . . . . . . . . . . . . . . . . . . . . . 139

LPC Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

LPC Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

LPC Operation for 27.5-50T Units w ith Modul ati ng Reheat . . . . . . . . . . 139

HPC Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

HPC Seq uence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Novar Controls (Sequence of Operation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Novar Controls Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Cooling w ith an Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Cooling w ithout an Econom izer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Economizer Set-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Novar Controls Checkout/Troubleshooting Procedure . . . . . . . . . . . . . . . . 143

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Checkout Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Voyager Com m ercial 27½ to 50 Tons CV and VAV . . . . . . . . . . . . . . . . . . . . . . . 146

RT-SVD03G-EN 7

Page 8

Over view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Constant Volum e (CV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Variabl e Air Volum e (VAV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

RTRM - ReliaTel Refrigeration Module - (standard) . . . . . . . . . . . . . . . . 146

RTOM - ReliaTel Options M odule - (standard) . . . . . . . . . . . . . . . . . . . . 147

RTAM - ReliaTel Air Handler M odule - (standard on VAV) . . . . . . . . . . 147

ECA - Econom izer Actuator - (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . 147

TCI - Trane Communication Interface - (optional) . . . . . . . . . . . . . . . . . 147

LCI - LonTalk Com m unication Interface (opti onal) . . . . . . . . . . . . . . . . . 147

IGN - Ignition Control M odule (YC* only) . . . . . . . . . . . . . . . . . . . . . . . . 147

Configuration Inp ut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Supply Duct Static Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

VHR Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Applicat io n N otes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

BAYSENS021A Setpoint Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Remote Setpoint Inputs on RTAM J7: . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Outdoor Air Flow Com pensation for VAV Units . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Outdoor Airflow Com pensation (27½ - 50 Ton VAV only) . . . . . . . . . . . 158

Set up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Operation for RTRM 7.0 and Earlier with RTEM or Any RTRM w ith Honey-

well ECA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Operati on for RTRM 8.0 and Later with RTEM . . . . . . . . . . . . . . . . . . . . 159

Software Change History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

8 RT-SVD03G-EN

Page 9

General Information

ReliaTel vs. Electromechanical

Three to ten ton convert ible packaged gas/electric (YSC, YHC) and cooling on ly (TSC, THC) ar e available w ithout m icr oprocessor controls. W ith electrom ech anical control s, zone sensors cannot control the units, nor can building automat ion system s com m unicat e with it. Electrom echanical units requir e the use of a therm ostat or relay based contr ol system to dir ectly control relays, contactors, etc. The i gnitio n contro l and econom izer are d iffer ent than the o nes used w ith ReliaTel. Service inform ation for these com ponents are handled separately in this b ook.

• ReliaTel Controls: 9th digit “ R”

• Electrom echanical Controls: 9th digit “ E”

• 27.5-50 To n: ReliaTel controls 10th digit “ M” or greater.

ReliaTel – Module Descriptions

Each ReliaTel Module is a com municating control.

ReliaTel Refrigeration M odule (RTRM)

Every Rel iaTel unit uses an RTRM. Th e RTRM provi des pr im ary unit con tro l fo r heating and cool ing. In addition, it has built-in logic that con trols heating and cooling st aging, mini mum run tim es, diagnosti cs, heat pump defrost control, short cycle tim in g and m ore. It can be control led directly by any of t he following:

• Zon e Sensor M odul e (BAYSENS006-11B, AYSTAT661-664B).

• Program m able Zone Sensor (BAYSENS019* , 20* , AYSTAT666* ).

• Convention al Therm ostat (such as BAYSTAT036-038A, ASYSTAT701-703).

Not e: U nlike the prev ious Mi cro, a conventional thermo stat does not requir e any sort o f interface.

It can be w ired directly to the RTRM .

In addition, the unit can be controlled using Trane® ICS system s by app ly ing the appropriate interface. The RTRM is configured through th e unit wiri ng harness. The sam e m odule is used on gas/electri c, cooling o nly w ith electric heat, and heat pump s. The follow ing addi tional inputs are connected to th e RTRM :

• Outdoor Air Sensor (OAS).

• Coil Tem perature Sensor (CTS) heat pum p onl y.

• Smoke detector (u nless it is fact ory instal led) or oth er shutdown device.

ReliaTel Option Module (RTOM)

The RTOM gets power fr om and comm unicates w ith the RTRM .

Any of th ese optional ReliaTel devices require the use of an RTOM :

• Frostat (FOS).

• Clogged Filter Sw itch (CFS).

• Fan Failur e Switch (FFS).

• Discharge Air Sensor (DAS) used for supply air tempering and ICS in put data.

• Smoke Detector, Facto ry Installed (A factory-i nstalled Sm oke Detector provid es instant shutdow n and ICS alar m output.)

Not e: On 27.5-50 Ton Units RTOM is standar d.

RT-SVD03G-EN 9

Page 10

General Information

Reliatel Ventilation M odule (RTVM)

The RTVM i s a mo dul e requ ired for uni ts con fig ured with Space Pressur e Con tro l w ith Stati trac. Th e m odu le con tro ls the Exh aust Dam per Po siti on 0-10Vdc o utp ut as w ell as t he Space Pressure Senso r calibration routine. The m odule accept s the following inpu ts:

• Statitrac Configur ation.

• Space Pressure Inp ut.

• Space Pressure Setpoint.

• Space Pressure Setpoint Deadban d.

Reliatel Dehumidification M odule (RTDM)

The RTDM i s a m odule requir ed for units co nfigured w ith M odul ating Dehumi dification. The module controls M od ulating Coo ling and Reheat valves as w ell as the Reheat Circuit Pum pout Solenoid. The m odul e accepts the follow ing i np uts:

• Reheat Circuit Enter ing Evaporator Tem perature.

• Reheat Circuit Low Pressure Cutout Inp ut.

Economizer Actuator w / M odule (ECA or RTEM)

The econom izer can be used w ith or w ithout the Option s module. Th e actuator has a detachable com m unicat ing m odule, which can be replaced separatel y. The outd oor air sensor, connected to the RTRM, p rovides outdoor temp erat ure inform ation for the changeov er decision.

The ECA accepts the follow ing inputs:

• Mixed Air Sensor (MAS).

• Return Ai r Sensor (RAS) for comparative enthalpy or ICS input data.

• Outdoor Hum idity Sensor (OHS) for reference or comparative enthalpy.

• Return Ai r Humidity Sensor (RHS) for com parati ve en thalpy.

•CO

• Rem ote Minim um Potentiom eter (RMP).

• Active/Passive DCV Configuration Input (RTEM only).

• The Pow er Exhaust relay is connected to th e ECA m odule as w ell .

Sensor 0-10VDC input.

COMM 3/ 4 Communication Interface

Allows ICS com m unicat ion betw een a ReliaTel unit and Trane ICS system s as follows:

• Tracer™ 100 series

• Tracer™ Sum mit

•Tracker™

•ComforTrac™

• VariTrac™ 1 (Comfort M anager)

• VariTrac™ 2 (Central Control Panel)

LonTalk® Communication Interface

Allows Building Managem ent System (BMS) communi cati on to a ReliaTel unit. There are 2 LCI ver sions, one for SCC cont rol (constant volum e un its) and one for DAC control (VAV units).

10 RT-SVD03G-EN

Page 11

Module Flow Diagram

Figure 1. TSC/THC Refrigeration Module (RTRM) Electric Heat/ No Heat

Unit Control, Select one

TS/H Refrigeration Module

Zone Sensor

Mechanical

Thermostat

G Y1 Y2 W1

R C/B

Zone Sensor

Programmable

4 Zone Sensor Inputs (AIP)

4 Outputs

LED or indications

Non Heat Pump Config (BIP)

1 Compressor Config (BIP)

1 Stage Heat Config (BIP)

4 Thermostat inputs (BIP)

3 to 7 wire Communicating ZSM

COMM 3/4

Communication

Interface

Options Module

Economizer

Module

w/Actuator

24 VAC

Powe r

Indoor Fan Output (BOP)

MODBUS Communication

Compressor 1 Output (BOP)

Compressor 1 Proving (BIP)

Compressor 1 Disable (BIP)

Emergency Stop (BIP)

Electric Heat 1st Stage

Electric Heat 2nd Stage

Service Test input (BIP)

Outdoor Air Temp (AIP)

LEDs: System TX, RX

Resistor

Sensor

IDF

CC1

Electric

Heat 1

Electric

Heat 2

RT-SVD03G-EN 11

Page 12

Module Flow Diagram

RTRM

Figure 2. Refrigeration Module (RTRM ) Gas Heating

Unit Control, Select one

Zone Sensor

Mechanical

Thermostat

G Y1 Y2 W1

R C/B

Zone Sensor

Programmable

YS/H Refrigeration Module

4 Zone Sensor Inputs (AIP)

4 Outputs

LED or indications

Non Heat Pump Config (BIP)

4 Thermostat inputs (BIP)

3 to 7 wire Communicating ZSM

1200 BPS Comm

1 Compressor Config (BIP)

1 Stage Heat Config (BIP)

Gas Heat

Module

(IGN)

COMM 3/4

Communication

Interface

Options Module

Economizer

Module

w/Actuator

24 VAC

Powe r

Indoor Fan Output (BOP)

MODBUS Communication

Compressor 1 Output (BOP)

Compressor 1 Proving (BIP)

Compressor 1 Disable (BIP)

Emergency Stop (BIP)

Service Test input (BIP)

Outdoor Air Temp (AIP)

IDF

CC1

Resistor

Sensor

LEDs: System TX, RX

12 RT-SVD03G-EN

Page 13

Figure 3. Refrigeration Module (RTRM) Heat Pump

LED or indications

WS Refrigeration Module

4 Zone Sensor Inputs (AIP)

4 Outputs

No Electric Heat Configuration (BIP) (open when heaters installed)

Outdoor Fan Output

7 Thermostat inputs (BIP)

3 to 7 wire Communicating ZSM

Switchover Valve Output

MODBUS Communication

Compressor 1 Output (BOP)

Compressor 1 Proving (BIP)

Coil Sensor Temp (AIP)

Electric Heat 2nd Stage

Compr 1 Disable (BIP)

Service Test input (BIP)

Outdoor Air Temp (AIP)

LEDs: System TX, RX

24 VAC

Powe r

Sensor

Resistor

Electric

Heat 2

Electric

Heat 1

CC1

SOV

Unit Control, Select one

Zone Sensor

Mechanical

Thermostat G Y1 Y2 O

W2 X2 T

R C/B

Zone Sensor

Programmable

COMM 3/4

Communication

Interface

Options Module

Economizer

Module

w/Actuator

IDF

ODF

Sensor

Indoor Fan Output

1 Stage Electric Heat Config. (BIP) (open when 2 Stage heaters installed)

Emergency Stop (BIP)

Outdoor Air Temp (AIP)

Module Flow Diagram

RTRM

RT-SVD03G-EN 13

Page 14

Module Flow Diagram

Options Module

Modbus Communication

Economizer

Actuator

Module

Refrigeration

Module

24 VAC

Supply Air Tempering Config (BIP)

Frostat Input (BIP)

Clogged Filter Input (BIP)

Fan Failure Switch (BIP)

Smoke Detector/Hi Temp Input (BIP)

Discharge

Air Sensor

24 VAC

Discharge Air Temperature (AIP)

Exhaust Fan Setpoint (AIP)

Relative Humidity Sensor

24 VAC

Exhaust (BIP)

Purge (BIP)

Pressurize (BIP)

Dehumid SP

Humidistat (BIP) Dehum/Reheat (3-50 tons)

Voyager 3 Configuration

Condenser Fan Cycling (27.5 - 50 ton)

Modulating Gas Heat Configuration

Discharge Air Heat Setpoint

Heat Pump Low Ambient Limit Config. Alarm Indication Config.

Reheat Enable

Supply Air Reheat Setpoint

RTOM

Figure 4. Options M odule (RTOM )

14 RT-SVD03G-EN

Page 15

Figure 5. Honeyw ell Economizer M odule (ECA)

Refrigeration

Module

24 VAC

Honeywell Economizer Module

Power Exhaust

ModBus Communication

24 VAC

PWR

EXH

relay

Enthalpy/Temperature Setpoint Pot.

0-50% Minimum Position Pot.

C02 Setpoint Adjustment (500-1500 ppm)

Mixed Air Temp (AIP) 10K 25C Neg Coeff

Return Air Relative Humidity (AIP) 4-20 mA Pos Coeff

Return Air Temp (AIP) 10K 25C Neg Coeff

Outdoor Air Relative Humidity (AIP) 4-20 mA Pos Coeff

IAQ Sensor (C02) (AIP) 0-10 VDC

Remote Minimum Position Pot. (AIP) 0-270 Ohm

MA Sensor

RH Sensor

RA Sensor

RH Sensor

Potentiometer

C02 Sensor

Status LED

Module Flow Diagram

ECA

RT-SVD03G-EN 15

Page 16

Module Flow Diagram

Refrigeration

Module

24 VAC

ReliaTel Economizer Module

Power Exhaust

ModBus Communication

24 VAC

PWR

EXH

relay

Enthalpy/Temperature Setpoint Pot.

DCV Setpoint LL 300-1900 ppm (RTRM v8.0 & later)

DCV Setpoint UL 500-1500 ppm (pre-RTRM v8.0) 1000-2000 ppm (RTRM v8.0 & later)

Mixed Air Temp (AIP) 10K 25C Neg Coeff

Return Air Relative Humidity (AIP) 4-20 mA Pos Coeff

Return Air Temp (AIP) 10K 25C Neg Coeff

Outdoor Air Relative Humidity (AIP) 4-20 mA Pos Coeff

IAQ Sensor (C02) (AIP) 0-10 VDC

Remote Minimum Position Pot. (AIP) 0-270 Ohm

MA Sensor

RH Sensor

RA Sensor

RH Sensor

Potentiometer

C02 Sensor

Status LED

DCV Mode

24 VAC

DCV Min Pos 0-40/50%

Design Min Pos 0-10/50%

RTEM

Figure 6. Economizer M odule (RTEM)

16 RT-SVD03G-EN

Page 17

Module Flow Diagram

COMM 3/4 Module/LCI

Modbus Communication

Refrigeration

Module

24 VAC

Options Module

Building

Automation

System (BAS)

Must be configured for COMM3 or COMM4 depending on input device. LCI is self-configured.

Address (BIP)

COMM3/4 only

COMM3

COMM4

Receive LED

Transmit LED

RTAM (VAV)

Figure 7. COMM 3/ 4 Module for ICS Communication/ LonTalk Communication Interface (LCI/ TCI)

LCI/ TCI

RT-SVD03G-EN 17

Page 18

Module Flow Diagram

TCI/LCI or Refrigeration Module

Options Module

DIP Switch

Duct Static Pressure Transducer

IGV or VFD

VAV Box Relay

Remote Static Pressure Setpoint

Remote Static Pressure Deadband

Remote Reset Setpoint

Remote Reset Amount

Remote Morning Warmup setpoint

Remote Supply Air Cooling Setpoint

Static Pressure Setpoint

Static Pressure Deadband

Reset Setpoint

Reset Amount

Morning Warmup Setpoint

Supply Air Cooling Setpoint

RTAM Module

Supply Air Heating Setpoint

Changeover Input

RTAM

Figure 8. Air Control Module (RTAM )

18 RT-SVD03G-EN

Page 19

Figure 9. ReliaTel Ventilat ion Module (RTVM )

Ventilation Module

Modbus Communication

Options Module

24 VAC

Statitrac Config

Exhaust Damper Output

Bldg. Pressure Transducer Calibration Output

Bldg. Pressure Transducer

Bldg. Pressure Setpoint

Bldg. Pressure Setpoint Deadband

Module Flow Diagram

RTVM

RT-SVD03G-EN 19

Page 20

Low Voltage Terminal Strip

Compressor 1 Disable

Compressor 2 Disable

Immediate Shutdown, Automatic Reset

24 VAC

Test Terminals

Test 1

Test 2









฀





฀฀











฀













,4"

TEST terminals.

By j um peri ng f rom TEST1 to TEST2, the ser vice t echn ician can test the u nit or start i t w ith or w it hou t any contro ls attached. See TEST MODE secti on for details.

Compressor 1 disable.

If the factory i nstalled jump er from 1 to 2 is rem oved (Compressor 1 d isable), com presso r 1 will not run, even in the TEST M ODE. This is wh ere a load shedding dev ice could be connected.

Compressor 2 disable.

If the factory i nstalled jump er from 3 to 4 is rem oved (Compressor 2 d isable), com presso r 2 will not run, even in the TEST M ODE. This is wh ere a load shedding dev ice could be connected.

Emergency Stop.

If the factory installed jum per fr om 5 to 6 is rem oved (Emergency Stop ), the unit will not r un. The RTRM sy stem LED w ill be on. Th e unit will have Heat + Cool diagnostic. A n ext ernal smoke det ector or other int erlock device can be added here.

Figure 10. Low Voltage Terminal Strip

Figure 11. LTB Layout

20 RT-SVD03G-EN

Page 21

Typical Control Box Layout

Compressor 1 Disable

Compressor 2 Disable

Immediate Shutdown, Automatic Reset

24 VAC

Test Terminals

Ignition Module

(IGN)

ReliaTel Refrigeration

Module (RTRM)

TCI (or LCI)

Communication

Module

Fan Relay

Compressor

Contactor

OD Fan

Capacitor

Crankcase

Heater

Thermostat

Inducer transformer (460/575 only)

Zone sensor or thermostat connections

24 VAC control transformer

Low Voltage terminal strip

Thermo stat

Zone Sensor

TEST 1 TEST 2

Figure 12. Typical Control Box Layout (3-5 tons)

RT-SVD03G-EN 21

Page 22

Typical Control Box Layout

Ignition Module (IGN)

ReliaTel Refrigeration Module (RTRM)

TCI (COMM3/4) or LCI Interface

Fan Relay

Compressor Contactors

Inducer Transformer (460/575 only)

Zone Sensor or Thermostat Connections

24 VAC Control Transformer

Low Voltage Terminal Strip

OD Fan Capacitor

Compressor 1 Disable

Compressor 2 Disable

Immediate Shutdown, Automatic Reset

24 VAC

Test Terminals

Thermostat

Zone Sensor

CC1

CC2

TEST 1 TEST 2

Figure 13. Typical Control Box Layout (T/ YSC072-102E, T/ YHC048-072E, & WSC060-090E)

22 RT-SVD03G-EN

Page 23

Figure 14. Typical Control Box Layout (T/ YSC120E, T/YHC092-120E, & WSC120E)

Typical Control Box Layout

RT-SVD03G-EN 23

Page 24

Typical Control Box Layout

Ignition Module

RTOM (Options Module)

RTRM (Refrigeration Module)

Zone Sensor or Thermostat Connections

TCI (or LCI) Communication Module

24 VAC Control Transformer

Low Voltage Terminal Block

Compressor 1 Disable

Compressor 2 Disable

Immediate Shutdown, Automatic Reset

24 VAC

Test Terminals

Fan Relay

Compressor Contactors

CC2

CC1

Zone Sensor

or Thermostat

TEST 1 TEST 2

Figure 15. Typical Control Box Layout (12½ - 25 tons)

24 RT-SVD03G-EN

Page 25

ReliaTel Refrigeration Module (RTRM)

Figure 16. ReliaTel Refrigeration M odule (RTRM ) - Layout

OUTDOOR COIL TEMP

2 Signal

INDEPENDENT CIRCUIT/

OUTDOOR COIL TEMP

2 COMMON/CONFIG

COMMON

MOD DEHUMID CONFIG

1 2 3 4 5

Config - Extended Heat

2 Stage Heat Config

3-Step Cooling Input ODF A Relay Output

Windmill Prevention Disable

ODF B Relay Output

Coil Temperature

Common

24 VAC

Lead/Lag Config

CC2 Output CC2 Proving

LPC 2 Input

24 VAC In

Heat 1 Heat 2

SOV 1

SOV 2

Sensor

Electric Config

Common

RTRM FAN FAIL CONFIG

FAN PROVING Input

Outdoor

Air Sensor

24 VAC

3 2 1

4 3

8 7 6 5 4 3 2 1

8 7 6

4 3 2 1

Transmit LED

ModBus

Communication

Gas Heat

Communication

2 Compressor Units

Heat Pump/ Electric

Heat

(Green)

Common

Config Common

Config - 1 Compressor

345

Receive LED (Yellow)

Green LED “System”

Config - Non Heat Pump

LPC 1 Input

Config - EDC Disable

Config - 1 Stage Heat

678

Compressor 1 Relay Output

CC 1 Proving

Programmable

Mechanical

Test 1

Fan Relay Output

Test 2

Emergency Stop

131214

Conventional Thermostat

Zone Sensor Module

T X2 Y2

W1/O

8 7 6 5

4 3

2 1

Common

T X2

G W1 (YC, TC) O (WC) Y1

R (24 VAC)

24 VAC

Communication Input for Prog. ZSM Common ClogFilter/Fan Failure Indication

System/Test Indication Cool/Cool Fail Indication Heat/Heat Fail Indication Common Heating Setpoint Mode Input Cooling Setpoint Common

Zone Temp Input

Conventional Thermostat

Mechanical ZSM

Green System LED

Green TX LED

Yellow RX LED

On - Normal Off - No Power, Board Failure

Blinking - Test Mode

Two 1/4 Second Blinks Every 2 Seconds Diagnostic Present (Version 4.0+)

Two 1/4 Second Blinks Every 2 Seconds - Diagnostic Present Off - No Power, Board Failure

1/4 Second Blink Every 2 Seconds - No ModBus Communication

Very Fast Flash .5 Second, Off 1.5 Second - ModBus Communication Occuring

* To en able lead/lag on multiple co mpresso r units, cut w ire connect ed to J-3-8

RT-SVD03G-EN 25

Page 26

ReliaTel Refrigeration M odule (RTRM)

Figure 17. ReliaTel Refrigeration M odule (RTRM) - Board Connect ions

RTRM Diagnostics

Not e: For produ ction, several ver sio ns of the RTRM are used dep ending on unit functi ons. There

is one replacement m odul e for all units.

RTRM System LED Diagnostic Indicator

On RTRM ver sion 4.0 or h igher, the green system LED on the RTRM m odule can provide a quick visual indication of the presence of certain diagnost ics. If the green LED on the RTRM is blinkin g with two ¼ second blinks every two seconds, one o r m ore of th e follow in g diagnostics is present:

3-50 Ton Units

Supply fan fail Zone tem perature sensor input failure on CV units Program m able ZSM com m unication fail ur e Manual compresso r lockout (one or both circuits) Outdoor coil tem p sensor failure (heat pumps only ) Defrost fault condition (heat pu mps only) Gas heat failur e Discharge Air Tem perature Failure o n M odulating Heat and M odulating Reheat units

26 RT-SVD03G-EN

Page 27

ReliaTel Refrigeration M odule (RTRM)

Froststat A cti ve Outdoor Air Temperature Sensor Failu re Smoke Detector Active Entering Evaporator Tem p. Failure (On Modulating Reheat Un its) RTOM Com m . Failure RTDM Comm. Fail ure (On M odulating Reheat Units) RTVM Comm. Failure Space Pressure Sensor Failure Dehu midification M is-Con figuration Reheat Circuit Enter ing Evaporator Temperature Fail ur e

27½ to 50 Ton Units:

Zone tem perature sensor failure durin g unoccupi ed m ode and on units w ith Modulating Reheat (VAV only) Static pressure transd ucer output failur e (VAV onl y) High duct static pressure trip (VAV only) Discharge air sensor failure (VAV only)

If the service technician sees the RTRM faul t indication, the next step is to check for d iagnostics as indicated o n the follow ing pages t o help deter mine which of the above diagnostics is present.

Not e: Since Constant Volume (CV) un its 3-50 ton m ay use a conven ti onal thermostat, the RTRM

will not display a diagn ost ic if a zone sensor is not attached w hen pow er is appli ed t o the unit. Also, th e RTRM ignor es a zone sensor if i t is att ached to a pow ered-up u nit (after a brief time-out). Therefo re, al ways reset pow er after inst alling a m echanical ZSM such as a BAYSEN S006 – 010 to term inals RTRM J6-1 through J6-10.

The RTRM provid es certain di agnostic i nform atio n to the en d user or ser vice technician depending on the type of controls used. Regardless of contr ols used howev er, a serv ice technician with a DC voltmeter can read the diagnostics at the RTRM as sho wn below.

Not e: When a vol tm eter is first applied, allow 2-3 seconds for the readi ng to stabili ze.

The act ual r eadings o btained var y dep ending o n th e cont rol s used. The fol low in g charts show w hat readings to expect, as w ell as w hat th e readings m ean.

Table 1. Approximate voltage readings (depending on control used)

Therm ostat or

See “ What t he

re adi ngs m ean" on

the following pages.

OFF

PU LSI N G

RT-SVD03G-EN 27

m echani cal ZSM

wi thou t in dicat ors or

wi th no con tr ols

at tached at al l

32 VDC ± 1 0% 26 VD C ± 1 0% 2. 0 VDC ± 10 %

0. 75 VDC ± 1 0% 0. 75 VDC ± 1 0% 0. 75 VDC ± 1 0%

20 t o 30 VDC 1. 5 to 2 .5 VDC 14 t o 30 VDC

Prog ramm abl e

ZSM wit h

in dicators

Mech anical ZSM

wi th i nd icat ors

Page 28

ReliaTel Refrigeration M odule (RTRM)

Service Diagnostic

What the readings mean

Service- RTRM-J6-10.

ON - Clogged filter sw itch has b een closed for at l east 2 m inutes, in dicating a cl ogged filter. This

exam ple illustrates wh at w ould be seen if the unit di d n ot have a zone sensor wi th indicator LEDs, such as w ould be the case w it h an ICS system . attached. Volt met er readings should be w ithin 10%.

OFF -

1. Clogg ed filter swi tch is in open position or no switch i s installed.

2. Fan Fail switch (i f installed) has opened (3-25 Ton) or closed (27.5-50 To n) w ithin the fir st 40 seconds, prov ing that the supp ly fan has st arted.

PU LSIN G -

1. Fan Prov ing swi tch (also called Fan Fail Switch FFS) has fail ed to open (3-25 Ton) or closed (27.550 Ton ) before 40 seconds. During th is con dition, the un it w ill run for 40 seconds an d then stop. Only the fan w ill run du ring the TEST m od e, except d uring the first 40 seconds.

2. Freezestat Active

3. Sm o ke Detector Activ e

Not e: N ote t hat at the bott om of t he m eter d ispl ay, the " analo g bar " w ill pul se back and f orth . Som e

meter s do not have th is extra feature.

Tab l e 1, p . 2 7 lists voltages seen if a zone sensor is

Service LED

Part Number – SEN01522

28 RT-SVD03G-EN

Page 29

ReliaTel Refrigeration M odule (RTRM)

System on LED

Colon pulses when input is connected

Part Number – SEN01522

System Diagnostic

What the readings mean

System- RTRM-J6-9.

ON – System i s po wered up. This output sh ou ld be on w henever the green RTRM System LED is

on. Incidentally, this LED may flicker as part of its norm al function on older v ersi on boards.

OFF – If 0 VDC is seen, the RTRM does not have pow er, the output wiring is shorted, or there is an internal failure. Remove any wires connected to th is term inal and check again.

PU LSIN G – Un it is in the TEST mode. Also duri ng the TEST mode the Syst em LED will pulse on and off. This output do es not provide any diagnostic inf ormation, but is a good place to conf irm that voltage readings taken are con sistent with what should be seen on other outputs.

RT-SVD03G-EN 29

Page 30

ReliaTel Refrigeration M odule (RTRM)

Cool Diagnostic

What the readings mean

Cooling-RTRM-J6-8.

ON – System is in the cooling m ode and actively cooling. The unit could be econom izin g or have

one or both com pr essor s on. If the u nit is a heat pump, th e rev ersing valve is energized as w ell.

OFF – System is not actively cooling. It may or m ay not be in the cooling mode.

PU LSIN G – This indicato r can mean one or more of t he follow ing:

Any controls

1. CC1 o r CC2 o pens during cooli ng, or is open w hen a cal l for compresso r occurs. Th e unaffected circuit w il l still run. W ith RTRM ver sion 4.0 or greater, CC1 or CC2 circuit must open on 3 consecutive cycles. On the 4th trip, th e unit will lo ckout.

2. CPR1 Disab le or CPR 2 Di sable input has open ed during a com pressor cycle each tim e a com presso r starts (w ithin the first 3 minutes) f or 3 consecutive cycles. It locks out on the fourth cycle. The unaffected circuit w ill still run.

3. Su pply Air Temperature is invalid and unit i s VAV or CV with Modulating Reheat.

Mechanical ZSM

1. Zone tem perature input failure after a successfu l input.

2. Both heating an d co oling setpoint inpu ts have failed or are not attached (such as when using a 2 - wire sensor on terminals 1 & 2).

Programmable ZSM

The ZSM has failed to com m unicate for 15 consecutiv e minutes after successful com m un ication has occurred.

Cool LED

Snowflake flashing indicates active cooling mode

E2 flashing indicates a COOL FAIL

30 RT-SVD03G-EN

Page 31

ReliaTel Refrigeration M odule (RTRM)

Heat LED

Flame flashing indicates active heating mode

E1 flashing indicates a “Heat Failure” diagnostic

Heat Diagnostic

What the readings mean

Heating-RTRM-J6-7.

ON – System is acti vely heati ng.

OFF – System is not actively heating.

PU LSIN G – See below:

Gas heat

If any fai lure occurs such as lo ss of flame, lim it sw it ch trip, flame r ollout etc, this indi cation is present. Further diagn ost ics are available by examining the Ignitio n Module LED. See the gas heat section for detail .

Electric heat

These units have safety lim it switches in the electric heat control ci rcuit. Should a limit swi tch trip, no diagnostic w il l o ccur. the HEAT indication wi ll stay ON.

Heat pump

Unit is in th e EMERGENCY HEAT m ode.

If t he Com presso r Disab le cir cuit or CC1, CC2 circu its cr eate a lo ckou t du rin g heat ing mo de, a COOL FAIL (p ulsing) indication will occur, not a HEAT FAIL (pulsing) indication. See COOL indications for details.

Any unit

Supply Air Temp erature Sensor Failure an d Unit is CV wi th M odu lating Heat or Modulati ng Reheat.

RT-SVD03G-EN 31

Page 32

ReliaTel Refrigeration M odule (RTRM)

OOL

Part Number – SEN01522

Heat Fail - Cool Fail Diagnost ic

What the readings mean

HEAT FAIL and COOL FAIL at the same time, RTRM -J6-7 & 8 pulsing voltage: 1.

1. Coil tem perature sensor is open or shorted. (Heat Pum p)

2. U nit has failed to defrost properly. See Heat Pum p sect ion for further detail s.

3. Outdoor air sen sor is open or shorted. (RTRM version 4.0 or greater.)

4. Deh um idi fication unit- RTOM disconnected or not communicati ng. RTOM will fl ash once every few seconds.

5. Em ergency stop input is open.

6. Factory installed phase monito r is indicating a fault

7. FrostStat Input Active

8. Sm o ke Detector Activ e

9. Ent ering Evaporator Tem p. Failure (On Modulat ing Reheat Units)

10. RTDM Communication Failure (On M odulating Reheat Units)

Cool LED Heat LED

Alterning E1 and E2 flashing indicates a “Heat Failure and Cool” Failure diagnsotic

Part Number – SEN01522

Compressor will not run, no diagnostics:

1. Frostat trip (RTRM v8.0 and later w il l ex hibit diagnostics as described above).

2. Com pressor disable inpu t open.

3. U nit is econom izing, and ou tside air damper is not yet at 100%.

4. U nit is in heat m ode or off m ode.

5. Tracer or b uilding m anagement system is preventin g compressor operati on (dem and lim it ).

Supply fan OFF, no diagnostic

32 RT-SVD03G-EN

Page 33

ReliaTel Refrigeration M odule (RTRM)

Unit is in OFF mode local ly or throu gh TCI/LCI

Heat Pump- Compressors will not run

1. Unit i s in the EMERGENCY HEAT m ode.

2. If the Compressor Disable cir cuit or CC1, CC2 cir cuits create a lockout duri ng heating m od e, a COOL FAIL (pulsing) indication wi ll occur, not a HEAT FAIL (pulsing) indication. See COOL indicatio ns for detai ls.

27½ to 50 Ton Unit Additional Diagnostics (VAV only)

If only one diagnostic is present, refer to t hat diagnostic. If m or e than one di agnostic is present, refer to combin ati on diagnostics such as

COOL + HEAT as appropriate. On a BAYSENS020* , th e display w ill show HEAT FAIL or COOL FAIL or SERVICE (or an appropriat e com binatio n) if a diagnostic is present.

HEAT (YC only)

1. TCO1, TCO2, or TCO3 has opened.

2. IGN Module lockou t (see gas heat sectio n for troubleshooting).

3. Su pply Air Tem perature sensor h as failed if co nfigured for M odulating Heat.

COOL

1. Discharge air sensor (DTS) is open, shorted, or has failed.

2. Zo ne temp input (RTRM J6-1) is open, shorted, or failed during an unoccu pied mode. If the unit has a default mode i nput (jumper from RTRM J6-2 to RTRM J6-4, a valid zone temp input is needed for unoccup ied heating, M WU and DWU.

3. CC1 or CC2 24 VAC control circuit has opened 3 times during a co oling m ode. Check CC1, CC2 coils or any con trol in series with the coils (w inding therm ostat, HPC, circuit br eaker auxili ary contacts).

4. LPC 1 or LPC 2 has opened during the 3 m i nute m inimum “ on” tim e during 4 consecutive com pr essor st arts. Check LPC 1 cir cuit by m easurin g vo ltag e fro m RTRM J 1-8 to chassi s gro und . Check LPC 2 circuit by measuring voltage fro m RTRM J3-2 to chassis ground. If 24 VAC is no t present, the circuit is o pen. 24 VAC should present at th ese terminals at all tim es.

27.5-50 Ton VAV Diagnostic

SERVICE

The supply fan proving sw itch (FFS) has fai led to open w it hin 40 seconds after the fan starts or has cl osed during fan operation.

COOL + SERVICE

1. Static Pressure Transducer output voltage at RTAM J1-3 is less t han 0.25VDC. The transducer output is open, shorted, or the transdu cer i s reading a negati ve supp ly air pressure.

HEAT + COOL

1. The Emer gency Stop input (TB1-5 and TB1-6) is open. Check this input at the RTRM by measuring voltage from RTRM J1-12 to chassis ground . 24 VAC should be present w henever the Emergency Stop inp ut is closed.

2. Outdoor air sen sor (OAS) input is open, shorted, or has failed.

HEAT + COOL + SERVICE

1. Static Pressure High Duct Static Trip. The stat ic p ressure has exceeded 3.5" W.C. th ree consecutive times.

2. Gr ound wire on transducer is open.

RT-SVD03G-EN 33

Page 34

ReliaTel Refrigeration M odule (RTRM)

LonTalk Communication Interface (LCI)

1. When an LCI (Lon talk Com m unication In terf ace) is in stalled on a Voyager Com mercial VAV un it, the morning Warmup (M WU) setpoi nt located on the RTA M board is ignored. The Morning Warm up and Daytime Warm up setpoi nts com e from the higher priori ty LCI-R DAC.

2. Th e MWU term inate setpoin t is identified as NCI (Network Configu ration Input) nciSetpoints.occupied heat. The default setpoint i s 71F.

3. Th e MWU ini tiate setpoint is nciSetpoints.occupied heat - 1.5F.

Default Operations

The ReliaTel Refrigeration M odule (RTRM) can accept input from any of the follow ing:

Mechanical Zone Sensor M odule (ZSM ) BAYSENS106-111A, AYSTAT106A -109A.

Program m able Zone Senso r BAYSENS119* , AYSTAT666* Conventional th erm ostat BAYSTAT036038A (or similar).

ICS system s – Tracer, Tr acker, VariTrac With each i nstal led device, defau lt m odes of oper atio n com e into play, d epending on that devi ce’s inputs. Fo llow ing is a sum m ary of functi ons and defau lts.

Table 2. Default operation for Mechanical ZSM (CV Only):

J6 I n put / co nn e ct io n if n o in put / co nne ct ion t his ha ppen s:

J6- 1- Zon e Te mper at ur e Uni t st ops

J6- 2 Com m on t ermi nal f or 1 -5 Uni t st ops

J6- 3 Cool ing Set Point (CSP) HSP + 3 F if Lo cal Unit Mod e is Aut o, ot her wi se Local HSP

J6- 5* - Heat in g Set Poin t ( HSP) Local CSP - 3F if Local Un it Mode is Auto, other wise, Lo cal CSP

J6- 3& 5- No CSP or HSP from Z SM 74 F CSP, 7 1F HSP

J6- 4- Mode I npu t fr om ZSM Aut o Cha ngeov er wit h continuous fa n

J6- 6* - Comm on term ina l f or 7 -10 LED’s w ill n ot f un ction an y tim e

J6- 7* - Heat i ndicat ion

J6- 8* - Cool indi cat ion

J6- 9* - Sy st em indica ti on LED w ill not com e on w hi le un it h as pow er

J6- 10 * - Ser vi ce indicati on LED w ill not com e on w hen CFS or FFS tr ip s

* these connections are only on certain model ZSM’s

LED w ill not com e on w hi le heating LED w ill not flash du ri ng heat f ail

LED w ill not com e on w hi le coolin g LED w ill not flash du ri ng cool fai l*

Table 3. Default operation for Programmable ZSM:

J6 I n put / co nn e ct io n if n o in put / co nne ct ion t his ha ppen s:

J6- 7- Heat indica ti on from RTRM t o ZSM

J6- 8- Cool in di cat ion f rom RTRM t o ZSM

J6- 9- System in dication f rom RTRM t o ZSM

J6- 10 - Ser vice in dicat ion f ro m RTRM t o ZSM

J6- 11 - Com mon No display, no com mu nicat ion

J6- 12 - Com mu nication No com mu nicat ion - "Cool fa il" i ndicat ion

J6- 14 -24 VAC p ow er No display, no com mu ni cat ion

* cool fail indication can occur for several reasons. See d iagnostic section for more on this.

34 RT-SVD03G-EN

"Heat " w ill not be di splayed wh ile heat in g "Heat fai l" w ill n ot b e disp lay ed during h eat fail

"Cool" w ill not be di splaye d wh ile coolin g "Cool fail" w il l n ot b e disp lay ed du ring co ol fail*

Colo n (: ) will no t bl ink dur ing norm al operat ion "Te st" wi ll not be di splayed dur ing TEST m ode

"Service" w ill n ot b e displayed w he n clogged fil ter swi tch has t rippe d "Serv ice" will not flash w hen t he FFS has t rippe d

Page 35

ReliaTel Refrigeration M odule (RTRM)

Not e: Version 1.1 and 1.3 RTRM do n ot provi de Heat, Cool, Service, Cool Fail, Heat Fail indications

for Prog ram m able ZSM . Later versions (w ith a higher numb er) do.

COMM 3/4 and COMM5 Communication Int erface Module use M ODBUS com m un ication directly with the RTRM . Tracker and Tracer require inputs as shown :

Table 4. Default operation for ICS cont rol:

J6 i np u t/ con nect ion if n o in put th is h app ens:

J6- 1- Zon e temp eratur e Unit stops u nless Trace r i s pr ovi din g zone t emper at ur e in put ( CV un its)

J6- 2- Com m on t er mina l f or J6- 1, J6- 3, J6 -4 , J6- 5

J6- 4 Mode i nput ( VAV u ni ts) Unit sto ps unless Tracer is pr ovidi ng a Mod e i np ut .

Not e: VariTr ac does not req uire any input to J6

Table 5. Conventional ZSM thermostat -default operation

I np u t/ con nect ion if n o in put , t his ha ppe ns:

G ( In doo r fan) The purpose of G is to prov id e a w ay t o run th e f an cont inuou sly

See sect ion on Conv ent ional Ther mostat Operat ion for m ore on t his.

Table 6. 27.5-50 Ton VAV Units

I npu t/ con necti on ( 2 7 ½ t o 5 0 t on VA V on ly ) I f no i npu t, th is h app ens:

Def au lt m ode input jum per J6-2 to J6- 4. Wit hou t a mode in pu t, t he uni t will not run.

Zone te mper at ur e inp ut J6- 2 to J6- 1

Uni t sto ps u nle ss Trace r i s pr ov idin g zo ne tem pe rat ur e in put ( CV u nit s) or m ode input (VAV un it s) .

A h eat or co ol call w ill also enable t he fan.

Uno ccup ied m ode ( short J6-1 1 to J6-1 2) . Giv es cool fail di agn ost ic.

RT-SVD03G-EN 35

Page 36

ReliaTel Option M odule (RTOM)

Discharge Air Setpoint

Modulating Gas Heat Output

Modulating Gas Heat Conguration

Condenser Fan Cycling Conguration (Voyager III)

Voyager III Conguration

Dehumid.

SA Reheat

R130

J12

1 2 3 4 5 6 7

Heat Pump Low Ambient Limit Config.

Alarm Indication Config.

Alarm Indication Output

Common

RTOM Layout

3 to 10 Ton

The RTOM is installed i n the indoor fan section. When field install ed, it comes wi th a short harness which allow s bo th ends of the unit control harness to be attached.

12½ to 50 Ton

The RTOM is installed in the contro l panel.

Figure 18. ReliaTel Option M odule (RTOM ) Layout

36 RT-SVD03G-EN

Page 37

RTOM Inputs

ReliaTel Option Module (RTOM)

J1, J2 Inputs:

J1 provides 24VAC pow er and MODBU S com m unicatio n to and from the RTRM (via the COMM module if used). J2 sends pow er and comm unication to t he ECA (if used).

J3 Inputs:

J3-1 to J3-2 – Allow s sup ply air tempering when using a mechanical ZSM . Removed = supply air tem pering enabled, installed = disabled. Supply air tempering can also be enabled or di sabl ed b y using the BAYSENS019* /AYSTAT666* or a Trane ICS system.

J3-3 is modu lating gas heat config. input

J3-4 is used wi th 27.5 - 50 ton un its to config ure condenser fan con trol type.

J3-5 is used to config ure the unit as a Voyager III unit. (27.5 - 50 ton units only).

J4 Inputs:

Discharge ai r sensor (10K @ 77°F/25°C) allows supply air tem perin g, also discharge air

inform ation for Bui lding Autom ation systems (BAS) using COMM 5 such as Tracer Summit™ V13 and Tracker™ Version 10. Earlier versions of Tr acker (V6.5 and below ) and any Tracer sy stem using COMM 3 or COMM 4 do not r ecognize this input.

The input seen by Tracer (usi ng COMM3 or COM M4) and Tracker (prior to Version 10) is “ Suppl y Ai r Tem per atur e”, w hich i s actual ly the M ixed Air Tem perature in put from the ECA to the RTRM . The other inp uts on J4 are not used.

J5 Output:

J5 is the 2-10 VDC out put used w hen the unit has modu lating gas heat.

J6 Inputs:

Vent il at ion overrid e inputs J6-1, 2, 3 are ex pl ained in the application section of this m anual.

Rem ot e Shut dow n – when this inpu t is open, the unit runs normally. When closed, the un it shuts

down after m inimu m run tim es are met, up to 4 minutes. Th is is not the sam e as th e emergency stop inputs on LTB 5& 6.

J7 Inputs:

Frost at:

3 – 25 t on

27 .5 – 5 0 ton

When the Frostat opens, the com pressors will re-start. There is no diagnostic during Frostat tri p.

Clogged f ilter sw itch is factory set to close at 0.45”, however is adj ustable from 0.05” to 12.0”. A 7/32” allen w rench is required for th is adju stm ent. When the switch i s closed for 2 minutes, t he serv ice in dicator o n th e ZSM w il l be on (see di agno stics sect ion for detai ls). Wh en th e swi tch opens, the indicator is off (auto reset).

Fan pr ovi ng sw it ch (3 -2 5 t ons) i s factory set t o op en at 0.07”, and i s adju stable fr om 0.05” t o 12.0”, though adjustment i s no t recom m ended. If the sw it ch do es no t open within 40 seconds after the fan starts, the unit stops, requir ing m anual reset from the Zone Sensor or BAS system , or by resettin g pow er to the unit . The SERVICE indicator on the ZSM will pulse during fan fail mode.

Fan proving sw it ch (27½ -5 0 t ons) is fact ory set to close at 0.15”, and is adjustable fr om 0.05” to 12.0”, though adjustm ent is not recomm ended. If th e switch does not close within 40 seconds after the fan starts, the unit sto ps, requiring m anual reset from the Zone Sensor o r BAS system, or by resetting pow er to the unit. The SERVICE in dicator on the ZSM w ill pul se du ri ng fan fail m ode.

Close s 1 0F ± 2º Opens 50 F ± 2º

Close s 3 0F ± 2º Opens 40 F ± 2º

RT-SVD03G-EN 37

Page 38

ReliaTel Option Module (RTOM)

Sm oke det ect or contacts are open dur ing normal operatio n. When closed, the un it shuts dow n

im m ediately. When the contacts are re-opened , the uni t w ill auto matically rest art.

Not e: Ventilat ion override optio n w ill override sm oke d etector input th rough the RTOM.

J8 Input:

Relat ive Humidit y Sen sor provides input to reheat for dehumidification.

J9 Input:

Reheat Enable Input provi des a binary input to configure the u nit for Reheat.

J10 Input:

Humidist at provi des bin ary in pu t to energize the reheat valve for dehum idif ication. When the

humidistat is satisfied, the reheat valve is de-energi zed (3 - 25 ton units only).

J12 Input:

Heat Pum p Low A m bien t Limit C onf ig provides a config ur ation input to disable com pressor

heating on heat pum ps when the Ou tdoor Tem perature falls bel ow 1.4F. Comp ressor Heating is r eenabled when the Ou tdoor Tem peratu re r ises to 3.5F.

Alarm Indicat ion Conf ig provides a configuration input to deter mine which diagnostics w ill energize th e Al arm Indication output. If Open, the Alarm Indication out put w ill en ergize wh enever the RTRM System LED is blinkin g a 2-b link err or code. If Closed to com m on, the Alarm Indication output wi ll energize whenever any key system com ponent is lo cked ou t (Cooling, Heating, etc.)

Alarm Ind icat ion Ou tput provides a 24vac output when the system is in an alarm conditi on as determ ined b y t he Alarm Indication config.

Setpoint Potentiometers

Exhaust setp oint potentiom et er sets the point to which the exhau st fan w ill com e on. It can be

set from 0% (exhau st is alw ays o n unless overrid den off) to 100% (exhaust fan comes on w hen econom izer is 100% outsi de air). Turn clockw ise to increase setpoin t.

Discharge A ir Heat Setpoint Pot ent iom et er sets the Discharge Air Heat Setpoint on units configured w ith Mo dulating Gas Heat under thermostat control.

SA Rehe at Set point Pot entiomet er - For 27.5-50T V3 units, used to set the Supply Air Reheat setpoint for units with Modu lating Dehum idification.

Dehum id. Setp oint - For units w ith reheat (On/Off and M odulating ) installed, used to set the space hum idity setpo in t used for dehum idificatio n control.

Not e: For RTOM v 3.0 and l ater, test poi nt "hoo ks" are i nclu ded on the m odu le nex t to each setpo int

potentiom eter to allow a m ore accurate setu p. Connect a DC volt m eter t o the test p oint and ground to verify the setpoint desi red according t o the tables b elow:

38 RT-SVD03G-EN

Page 39

ReliaTel Option Module (RTOM)

Table 7. RTOM Discharge Air Heat Setpoint

Volt ag e ( Vdc) Se tpo in t ( º F) Volt age ( Vdc) Se tpo in t ( º F) Vo lt ag e ( Vdc) Se tpo in t ( º F)

0. 00 50 1. 46 94 2. 23 138

0. 09 51 1. 48 95 2. 24 139

0. 13 52 1. 51 96 2. 25 140

0. 16 53 1. 53 97 2. 26 141

0. 20 54 1. 56 98 2. 28 142

0. 24 55 1. 58 99 2. 29 143

0. 28 56 1. 61 100 2. 30 144

0. 31 57 1. 63 101 2. 32 145

0. 35 58 1. 66 102 2. 33 146

0. 39 59 1. 69 103 2. 34 147

0. 42 60 1. 71 104 2. 36 148

0. 46 61 1. 72 105 2. 37 149

0. 50 62 1. 74 106 2. 40 150

0. 53 63 1. 76 107

0. 57 64 1. 78 108

0. 61 65 1. 79 109

0. 65 66 1. 81 110

0. 68 67 1. 83 111

0. 72 68 1. 84 112

0. 76 69 1. 86 113

0. 79 70 1. 88 114

0. 83 71 1. 89 115

0. 87 72 1. 91 116

0. 90 73 1. 93 117

0. 94 74 1. 95 118

0. 98 75 1. 96 119

1. 00 76 1. 98 120

1. 03 77 2. 00 121

1. 06 78 2. 01 122

1. 08 79 2. 03 123

1. 11 80 2. 05 124

1. 13 81 2. 06 125

1. 16 82 2. 08 126

1. 18 83 2. 09 127

1. 21 84 2. 11 128

1. 23 85 2. 12 129

1. 26 86 2. 13 130

1. 28 87 2. 13 131

1. 31 88 2. 14 132

1. 33 89 2. 16 133

1. 36 90 2. 17 134

1. 38 91 2. 19 135

1. 41 92 2. 20 136

1. 43 93 2. 21 137

RT-SVD03G-EN 39

Page 40

ReliaTel Option Module (RTOM)

Table 8. RTOM Supply Air Reheat Setpoint

Volt ag e ( Vd c) Se t po in t ( º F) Volta ge ( Vd c) Se t point ( º F)

0. 00 2 65 1 .6 83 73

0. 16 9 65 .5 1. 76 6 73 .5

0. 31 7 66 1 .8 22 74

0. 39 5 66 .5 1. 88 7 74 .5

0. 55 2 67 1 .9 40 75

0. 67 2 67 .5 1. 99 8 75 .5

0. 78 5 68 2 .0 64 76

0. 91 5 68 .5 2. 11 8 76 .5

1. 02 8 69 2 .1 75 77

1. 11 4 69 .5 2. 19 6 77 .5

1. 20 6 70 2 .2 34 78

1. 27 5 70 .5 2. 27 5 78 .5

1. 36 5 71 2 .3 18 79

1. 44 5 71 .5 2. 36 8 79 .5

1. 52 5 72 2 .4 15 80

1. 61 0 72 .5

Table 9. RTOM Dehumidification Setpoint

Volt ag e ( Vd c) Se tp oi nt ( % ) V olt a ge ( V dc) Setp oin t ( % )

0. 00 2 40 1 .7 45 53

0. 23 8 41 1 .8 24 54

0. 44 5 42 1 .8 53 55

0. 53 9 43 1 .9 29 56

0. 67 7 44 1 .9 78 57

0. 81 1 45 2. 07 58

0. 98 4 46 2 .1 36 59

1. 11 7 47 2 .1 84 60

1. 24 5 48 2 .2 59 61

1. 34 9 49 2 .2 68 62

1. 42 8 50 2 .3 24 63

1. 55 2 51 2 .3 97 64

1. 62 5 52 2 .4 48 65

40 RT-SVD03G-EN

Page 41

ReliaTel Ventilation Module (RTVM)

RTVM Layout

27.5 to 50 Ton

The RTVM i s installed in the economizer section for V3 units wi th Statitrac.

Figure 19. ReliaTel Ventilation M odule (RTVM) Layout

Statitrac Cong.

Cong. Common

Pressure Transducer Calibration Output

Space Pressure input Common

Space Pressure input Signal

Common

+5 Vdc

RTVM Inputs

J1, J2 Inputs:

J1 provides 24VAC pow er in to the board and MODBUS com muni cation to and f rom the RTRM. J2 provides 24VAC power and M ODBUS communicati on downstream to the ECA.

J11

Space Pressure

R40

Setpoint

Space Pressure

R42

Setpoint Deadband

Green LED

Solid On: Communication OK Blinking: No Communication

J-5

Exhaust Damper Output Common Exhaust Damper Output Signal

24 VAC

Common

ModBus

COMM

J3 Inputs:

J3 - 1, 2 inputs al low conf igurati on for Stati trac Control. If closed, the uni t is confi gured for Statitrac con trol.

J4 Inputs:

J4 - 3, 4, 5 prov id e 5Vdc to the Space Pressure Transd ucer, an input fo r the space pressure si gnal to the control board , and a com m on for the transd ucer.

J5 Output

J5 - 1, 2 provid es a 2-10Vdc output sign al and common to t he exhaust damper actuator.

RT-SVD03G-EN 41

Page 42

ReliaTel Ventilation Module (RTVM)

J11 Output

J11 - 1, 2 provides a 23Vdc outp ut and com m on for Space Pressu re Transd ucer calibration. This output is ener gized o nce every 60 seconds.

Setpoint Potentiometers

Space Pressure Set point (R40) potentiometer provides a space pressure setpoint for Statitr ac

Control. The range is -0.20iw c to 0.30iw c. Default is 0.08iw c.

Space Pressure Set point D eadband (R42) potentiom eter provides a selectab le deadband for the space pressure setpoi nt control. The ran ge i s 0.02iw c to 0.20iwc. Defaul t is 0.04iw c.

For RTVM v3.0 and later, test p oint "hooks" are included on the module next to each setpoint po tent iom eter to allo w a m or e accurat e setup . Co nnect a DC v olt meter to th e test p oin t and gro und to verify the desired setp oi nt according to the tables below:

Table 10. RTVM Space Pressure Setpoint

Volt ag e ( Vdc) S et poi nt ( I W C) Volt age ( Vdc) Se tpo in t ( I W C) V ol tag e ( Vd c) Se t poin t ( I W C)

0. 04 -0.2 1. 22 7 - 0.0 3 1. 96 6 0. 14

0. 11 8 -0. 19 1.2 76 -0. 02 2. 00 25 0.15

0. 19 6 -0. 18 1.3 25 -0. 01 2.0 39 0.1 6

0. 27 4 -0. 17 1.3 74 0 2.0755 0 .1 7

0. 35 2 -0. 16 1.4 23 0 .0 1 2. 11 2 0. 18

0. 43 - 0. 15 1 .4 72 0 .0 2 2. 14 85 0.19

0. 50 8 -0. 14 1.5 21 0 .0 3 2. 15 0. 2

0. 58 6 - 0. 13 1 .5 7 0. 04 2. 17 0 .21

0. 66 4 -0. 12 1.6 19 0 .0 5 2. 19 0 .2 2

0. 74 2 -0. 11 1.6 68 0 .0 6 2. 22 0 .2 3

0. 82 -0.1 1 .7 2 0. 07 2. 25 0 .2 4

0. 89 8 -0. 09 1.7 59 0 .0 8 2. 27 5 0. 25

0. 97 6 -0. 08 1 .7 98 0 .0 9 2 .3 0.26

1. 02 - 0. 07 1 .8 2 0 .1 2 .325 0.27

1. 08 - 0. 06 1. 8565 0. 11 2 .3 5 0. 28

1. 12 9 -0. 05 1.8 93 0 .1 2 2. 37 5 0. 29

1. 17 8 -0. 04 1. 9295 0. 13 2 .4 2 0 .3

Table 11. RTVM Space Pressure Setpoint Deadband

Volt ag e ( Vd c) Se t po in t ( I W C) V olt a ge ( V dc) Se tpoin t ( I W C)

0. 2 0. 02 1 .85 0.1 3

0. 35 0 .0 3 1. 95 0 .14

0. 53 0 .0 4 2. 05 0 .15

0. 71 0 .0 5 2. 13 0 .16

0. 91 0 .0 6 2. 21 0 .17

1. 1 0. 07 2 .28 0.1 8

1. 23 5 0. 08 2. 35 0 .1 9

1. 37 0 .0 9 2. 42 0. 2

1. 50 5 0. 1

1. 65 0 .1 1

1. 75 0 .1 2

42 RT-SVD03G-EN

Page 43

ReliaTel Dehumidification M odule (RTDM )

J1-1

J4-1

J6-1

J8-1

R50

J3-1

J5-1

Reheat Valve Motor Control Output

Cooling Valve Motor Control Output

Reheat Pumpout (NO)

Control Pumpout (COM)

J2-1

J4-1

24 VAC 24 VAC COMMON MODBUS MODBUS +

Reheat Ckt. Entering Evap. Temp. Common Reheat Ckt. Entering Evap. Temp. Signal

Reheat LPC Signal Input 12 Vdc

24 VAC

24 VAC COMMON

MODBUS -

MODBUS +

RTDM Layout

27.5 to 50 Ton

The RTDM i s installed in t he control box section for V3 units w it h M odulati ng Dehumidifi cation.

Figure 20. ReliaTel Dehumidification M odule (RTDM) Layout

RTDM Inputs

J4, J2 Inputs:

J4 provides 24VAC pow er in to the board and MODBUS com muni cation to and f rom the RTRM. J2 provides 24VAC power and MODBUS comm unication to the RTOM.

J6 Inputs:

J6 - 2, 3 provid es a tem perature inp ut for the Reheat Circuit Enterin g Evaporator Temperature.

J8 Inputs:

J8 - 1, 2 p rovide 12Vdc t o the Reheat LPC switch and an input for the Reheat LPC Sig nal.

J5 Output

J5 - 1, 3 provid es a norm ally open contact to be used for Reheat Pump ou t solenoid control.

J1 Output

J1 - 1, 2, 3, 4 provides the outpu t signals for the Reheat Val ve st epper m otor contr ol.

J3 Output

RT-SVD03G-EN 43

J3 - 1, 2, 3, 4 provides the outpu t signals for the Cool ing Valve stepper m otor control.

Page 44

Verifying Proper Air Flow

Units with Direct Drive Indoor Fan w ith MM C

Much of the system s perform ance and reli ability is closely associated with, and depend ent upon having the pr oper airflow supplied both to the space that is b eing condi tioned and across the evap orator coil. The indoor fan speed is changed by adjusting t he o utput voltage from the MMC to the direct d riv e fan. Before starting the SERVICE TEST, set t he minim um posi tion setpoi nt for the econom izer to 0% using the setpoint po tentiom eter located on the Econom izer Control M odule, if applicable.

ReliaTel Control: M omentarily jum p across the Test 1 & Test 2 termi nals on LTB1 one tim e to

start th e Minim um Ventilation Test.

Electro Mechanical Control: Perform the pro per test mode co nnections.

Once the supply fan has started , determ i ne t he total system air flow (CFM ) by (ReliaTel/ Electrom echanical):

1. Measure the DC voltage across pins Vt and com on the M MC. Using th e fan rpm table sho wn on the access panel label or in the uni t Service Facts, determine RPM correl ated to measured vo lt age.

2. M easure the amp erag e at the supply fan contactor and compare it w ith th e fu ll load am p (FLA) rating for the ev aporator motor stamped on the unit nam eplate.

a. Calculate t he theoretical BHP using (Actu al M otor Amps/ Motor Nam eplate Amps) X M oto r

HP.

b. Usi ng the fan performance tab les in the unit Servi ce Facts, plot t he act ual RPM (step 1) and

the BHP (step 2a) to obtain the op erat ing CFM.

3. If the required CFM is too low, (external stat ic pressure is high causing m otor HP output to be below table valu e),

a. Reliev e supply and/or ret ur n duct static.

b. Change indoor fan speed and rep eat steps 1 and 2.

• To In crease Fan RPM; Push & Turn th e knob on t he M MC counter-clockwise. M easure t he DC voltage acr oss pins Vt and com on the MMC. Usi ng the fan rpm table in the unit Service Facts, determ ine RPM correlated to m easured voltag e.

• To Decrease Fan RPM; Push & Turn the knob o n the M M C clockw ise. M easure the DC voltage across pins Vt and co m on the MM C. Using the fan r pm table in the u nit Serv ice Facts, deter mine RPM correl ated to measured vo ltage.

4. If the required CFM i s too high, (ext ernal static pressu re is low causin g m otor HP out put to be above table valu e), chang e indoor fan speed and repeat steps 1 and 2.

5. To stop the SERVICE TEST, turn the main pow er d isconnect sw itch to the "Off" position or proceed to the n ext com ponen t start-up procedure.

44 RT-SVD03G-EN

Page 45

ReliaTel LED Functions

ReliaTel Refrigeration M odule (RTRM )

Green System LED

• On: N ormal operation (slight flickering is norm al)

• Off: No pow er, board failure

• One blink: Emer gency stop open when attem pting test m ode.

• 2 flashes every tw o seconds indicates a diagnost ic is present (V 4.0 or greater) [see list of diagnostics]

• Continuous¼ secon d blink: Test Mo de

Green Transmit LED

• Very fast flash: Normal operation, inform ati on being sent to other modules.

• Off: System failure

Yellow Receive LED

• Very fast fl ash.5 second, off 1.5 second:

• Norm al com m unication

• 1/4 second w ink ever y 2 seconds:

• Not communicating with any other m odule

• Off: Board failure

p. 26 f or a

ReliaTel Options Module (RTOM)

Green system LED

• On: Normal com m unication w it h RTRM

• 1/4 second on, 2 seconds off: No communication

• Off: No power or board failure

ReliaTel Ventilation M odule (RTVM)

Green system LED

• On: Normal com m unication w it h RTRM

• 1/4 second on, 2 seconds off: No communication

• Off: No power or board failure

ReliaTel Air Handling M odule (RTAM )

Green system LED

• On: Normal com m unication w it h RTRM

• 1/4 second on, 2 seconds off: No communication

• Off: No power or board failure

RT-SVD03G-EN 45

Page 46

ReliaTel LED Functions

ReliaTel Dehumidification M odule (RTDM )

Green system LED

• NA - No Onboard LED

Economizer Actuator M odule (ECA)

Green system LED

• On: OK t o economize

• Slow flash: Not OK to econom ize

• Fast flash : Not commu nicating with RTRM

• OFF: No power or system failure

• 1/2 second on, 2 seconds off: no communication

• Error codes — 1/2 second on, 1/4 second o ff

• 1 flash – Actuator f aul t

• 2 flash – CO2 sensor

• 3 flash – RA humidity sensor

• 4 flash – RA tem p sensor

• 6 flash – OA hum idity sensor

• 7 flash – No Com m unication w ith RTRM or OAT sensor has failed.

• 8 flash – MA temp sensor

• 9-11 flash – Internal f ault

Ignition Control (IGN)

Not e: See igni tion control sect ion for specific f lash code schedul e.

Green

• On: N ormal no call for heat

• Slow flash: Activ e call for heat

• Fast flash : Not commu nicating with RTRM

• Error codes

• 2 flash – system lockout – failure to sense flam e

• 3 flash – pressure swi tch failure to close w hen CBM stops or open w hen CBM starts (not applicable to 12½ to 50 tons)

• 4 flash – TCO circuit open

• 5 flash – Flame being sensed yet gas v alve not energized

• 6 flash - Flam e Roll out (FR) circuit open (Not applicabl e to 12½ to 50 tons)

46 RT-SVD03G-EN

Page 47

TCI COMM3/ 4 Interface (Tracer, VariTrac)

Yellow RX (Receive) LED

• Flashing int erm ittently: ICS lin e acti vity

• Off: Com m unicat ion dow n or no power

Green TX (Transmit) LED

• Flashing int erm ittently: Unit is commu nicating OK with ICS system

• Off yet RX light f lashes – address wr ong, COMM3/4 b oard in w rong positi on

LCI (LonTalk)

LED1 Green MODBUS LED

• Flashing int erm ittently: Unit is commu nicating to RTRM

LED4 Green LCI status LED

• Flashing int erm ittently: Unit is co nnected to a LonTalk link.

LED2 Red Service LED

• OFF: Norm al

• Flashing 1 second on, 1 secon d off, LCI is in un configured state.

ReliaTel LED Functions

LED3 Yellow Comm RX

• Flashing int erm ittently: no rm al operati on.

RT-SVD03G-EN 47

Page 48

ReliaTel Test M ode

Protocol of Communications

It is possible, though n ot recommended, to conn ect m ultipl e control devi ces to a ReliaTel system . The term in al strip is arranged such that simu ltaneous connectio n of ICS com m unication (Tracker, Tracer, Summit, Var iTrac), M echanical Zone Sensor M od ule (ZSM), Programmable Zone Sensor, and a conven tio nal thermostat is po ssible. Of course, onl y on e devi ce can contro l the unit at a tim e. Follo wing is a protocol of communi cation; if co mmunicati on fails, the RTRM seeks the next low er priority level device. If no device is connected, the uni t w ill not run except durin g the TEST MODE.

• Highest pri ority — ICS (Tracker, Tracer, Vari Trac, Summit)— Using BAYSENS013, 014, 017 as needed

• Next priority — Prog ram m able Zone Sensor (BAYSENS019, AYSTAT666, BAYSENS020)

• Next priority — M echani cal ZSM (BAYSENS006-11B, AYSTAT661-664)

• Least prio ri ty —Conven tional Ther mostat (R, G, Y, W, C)

Although it’s possible to connect multiple devices, doing so in creases the chance for error i n application and troubl eshooting.

Not e: 27½-50 ton VAV- conventional therm ostat in puts do not w ork and ar e ig nored by the RTRM.

On pow er up, the RTRM loo ks for a zone tem perature input (J 6-1, J6-2). If it doesn’ t see one, it then ignores zone sensor inputs and loo ks for thermo stat (RGYW) inputs.

How ever, i f th e uni t do es see a vali d zone tem per atur e inp ut o n start up t hen t he th erm ostat (RGYW) inputs are ignored. A programmable zone sensor will take priority over either input w hen connected, and an ICS syst em takes the highest pri ority.

Service Test M ode

Allows the qualified service technician or instal ler to activate all f unctions o f the unit, regardless of therm ostat, sen sor, or i n some cases ICS inpu t.

Test Mode is activated u sing either a fixed resistance o r a jum per as explained below.

In Service Test Mode, the unit can be op erated in any of sever al pre-defined o perating modes that exercise all unit functions. The op erat in g m odes include Supply Fan On, Econ om izer open and close, Cool 1, Cool 2, Cool 3, Reheat Valve (for Staged Dehum idification), M odul ati ng Reheat and Cooling Valves, Reheat Circu it Pump ou t Solenoid, Heat 1, Heat 2, Emergen cy Heat (heat pumps only), and Outdoor Coil Defrost (heat pump on ly).

If a unit does not have a com po nent, such as an economizer, that test stage is skipped.Ther e are 3 ways to use the Test Mode; in each case, the uni t can b e running in any m ode or not running at all.

Service Test M ode can b e initiated any time the unit is powered and an open conditio n h as been detected on the Test Terminals at som e time since power-up.

Auto-Cycle Test

Place a jumper f rom TEST 1 to TEST 2. The unit will run i n each m ode for 30 seconds, scrol ling through all modes, then exiting the Test mode automatically.

To go through Test Mode again, rem ove th en restore the jum per.

If the jum per is removed at any tim e during the test mode, the unit will stay in the selected m ode for 1 hour (excep t for the defr ost mode on heat pum ps), then revert to norm al operation.

Unused states, such as Heat 2 wh en no Heat 2 is present, shall be skipped.

48 RT-SVD03G-EN

Page 49

Resistance Test

฀

฀฀

฀฀

฀

฀

฀

฀

฀









ReliaTel Test M ode

Specific operating states can be selected by app lying an approp riate resistance from TEST 1 to TEST 2.

Oper ating m odes can be changed i n any order b y app lying the co rrect resistance v alues. Op eration in any one m ode is lim ited to 60 minutes as w ith the jum per m eth od.

Re sist ance Te st T able:

1 Indo or fan on 2. 2k o hm s

2* Econom izer open 3 .3k oh m s

3 Cool 1 4. 7k o hm s

4* Cool 2 6. 8k o hm s

5* Cool 3 8. 2k o hm s

5 Heat 1 10 k oh m s

6* Heat 2 15 k oh m s

7* Heat 3 22 k oh m s

9* Heat 4 27 k oh m s

8* * Defr ost cycle/ reh eat 3 3k ohms

9* Emerg ency heat 47k oh m s

* Optional com ponents * *d efrost cycle in test m ode ru ns for at least 1 mi nute, up to 10 minutes, depending on outd oor am bient and ou tdoo r coi l tem peratu re.

Reheat step is valid only with dehumidifi catio n optio n and wi ll b e step 5 o f th e test.

Step Test

By placing a jum per from TEST 1 to TEST 2 for 2 continuous second s nominal, all ow ing the unit to energize the mode for at least 2 second s, th en placing the jump er again, the unit can be scrolled through modes as in met hod 1 but more quickly. Unused states, such as Heat 2 w hen no Heat 2 is present, shall be skipped.

Not e: 27.5-50 ton units see test m ode chart

Table 17 on page 53 and Table 18 on page 54.

Figure 21. LTB Layout w ith jumpers

RT-SVD03G-EN 49

Page 50

Re l i a Te l Te st M o d e

Test M ode

Service Tips:

• To ensure appropriat e unit restart after oper ating in Service TEST MODE, Serv ice TEST MODE termination cau ses a system reset resulti ng in execution of the startup seq uence identical to initial pow er-on startup.

• To p reven t un desir ed acti vation of Ser vice TEST M ODE at startup, Servi ce TEST M ODE can o nly be activated after an open condition has been detected on the Service Test term inals.

• When initiatin g the test mode i mm ediat ely after p ower-up, the RTRM 20 seconds self-t est must be completed before the test mode will work.

• The TEST MODE bypasses tim in g functions i ncluding minim um run times.

• TEST MODE does not bypass safety controls such as the high tem per ature lim it switch, high pressure control or sm oke detector circuits.

• To help wi th troubl eshoo ting, unpl ug J 4 fro m the RTRM . Thi s rem oves all op tional com pon ents such as t he COMM3/4, ECA and RTOM. (this m ay prevent key features from functioning. Avoid this procedure on 27.5-50 ton u ni ts as the V3 configuration w ill be lost).

• Som e test f unctions do no t work with LCI i nstalled. Rem ove LCI from the ci rcuit before ent ering the TEST mode.

Emergency Stop input, LTB 5&6 (3J1-12 on RTRM)

If this input is open, the indoor fan, heat & cooling w ill not run in the TEST MODE. The diagnostic for this condition is HEAT FA IL + COOL FAIL. When this in put is closed, the unit w ill restart.

When initiating the test m ode, if emer gency stop is open , the LED on the RTRM w ill flash one tim e.

Fan Proving input, 5J7-6 on RTOM –

The indoor fan will run in th e TEST M ODE for 40 seconds and then stop if this input fails to open (3-25 to n) or close (27.5-50 t on) w it hin 40 second s. The di agno stic f or t his f ailu re is SERVICE (pu lsin g

1.5 – 2.5VDC from RTRM J6-6 to J6-10).

Compressor disable inputs, 3J1-8, 3J3-2 (2 compressor units) on RTRM

If this input is open, ie. 24VAC not present, that co mpressor circuit will not run during TEST MODE. No diagno stic will be seen .

Compressor proving circuits, 3J1-9, 3J3-3 (2 compressor units) on RTRM

If this inp ut is open w hen the con tactor is energized by the RTRM , th at circuit will no t run during TEST M ODE. The diagnostic for t his failure is COOL FAIL (pul sing 1.5 – 2.5VDC from RTRM J6-6 to J6-8).

Gas heat failures, such as TCO, PS, FR

(see wiring diagram ) will not be byp assed during TEST MODE. Diagnostics can be picked up at the Ignition Control M odule. Also, an ad ditional di agnostic for this failure is HEAT FAIL (pulsing 1.5 –

2.5VDC from RTRM J6-6 to J6-7).

Ventilation Override mode (VOM), J6 on the RTOM

While in the test m ode, i f a VOM is activated, test mode w ill tem porarily b e halted. When the VOM is term inated, the test mo de w ill continue from w here it was halted.

C02 Option through DCV Input on ECA

Test m ode will operate no rm ally with a CO2 signal. When the econom izer step is initiated, t he CO2 sig nal i s overr idd en. Wh en th e test m od e goes t o th e next step, t he CO2 sig nal i s re-estab lished. The econom izer will drive to the clo sed position and then proceed to drive open from the CO2 signal.

50 RT-SVD03G-EN

Page 51

ReliaTel Test M ode

ECA M inimum Position Adjustment

During the economizer step (step 2 of test mode), the "Min pos" on th e ECA M odule is disabled. It can only be adjusted during step 1 of the test when the fan is on.

Frostat Input

J7-1, J7-2 on RTOM - if this input cl oses i ndicating a frosted suction line, the com pressor s will not run during the TEST M ODE. No diagnostic w ill be seen.

Table 12. Elect ric/ Electric Units 3-25 Ton

St e p Mod e I DM Econ CPR1 CPR2 HT1 HT2 OD M 1 O DM 2

1 Fan On On Min Off Off Off Off Off Off

2* Econ. On Open Of f Off Off Off Off Off

3 Cool 1 On Min On On

4 Cool 2 On Min On On

5 Cool 3 On Min On On Off Off On * *

6* ReheatOnMinOnOnOffOffOn**

7* Heat 1 On Min Off Off On Off Off Off

8* Heat 2 On Min Off Off On On Off Off

* With Optional Accessory * * "Off" i f OAT fal ls bel ow 60°F, "On" if OA T rises ab ove 65°F. Duri ng Reheat , if t he uni t is co nfi gur ed w ith 1 com presso r, ODM 2 is "O ff " if t he OAT f alls b elow 70°F,

"On " if the OA T rises ab ove 75°F.

1 . CPR2 ON d ur in g Cool 1 i f config ur ed for 3- Step Cooli ng; CPR1 OFF. 2 . CPR2 OFF du ring Cool 2 on a 3- Step Coo lin g uni t.

St eps fo r opt ion al accessories and m odes n ot pr esent in u nit will be ski pped.

(1) Off Off On * *

(2) Off Off On * *

Table 13. Voyager and Precedent Heat Pump Units 3-25 Ton

St e p M od e I DM Econ CPR1 CPR2 HT1 HT 2 SOV 1 ODM 1 ODM2

1 Fan On On Min Off Of f Off Of f Off Of f Off

2* Econ. On Open Of f Off Of f Off Of f Off Off

3 Cool 1 On Mi n On On

4 Cool 2 On Mi n On On

5 Cool 3 On Min On On Off Off On On * *

6 Heat 1 On Min On On

7* Heat 2 On Min On On On

8* Heat 3 On Min On On On On

9* Heat 4 On Min On On On On Off On On

10 * * * Def ro st On Mi n On On On On On Off Of f

11 Em Heat On Min Off Off On On Off Off Off

* With Optional Accessory * * "Of f" i f OAT f alls b elow 60°F, "On" if OAT ri ses abov e 65°F. * ** Defrost cycle in t est mode runs for at least 1 m inute, up to 10 minutes, d epending on o utd oor amb ient and o utd oor coil tem perature.

1 . CPR2 ON d ur in g Cool 1 i f config ur ed for 3- Step Cooli ng; CPR1 OFF. 2 . CPR2 OFF du ring Cool 2 on a 3- Step Coo lin g uni t. 3 . CPR2 OFF du ring Heat 1 if con fig ur ed fo r 2- Ste p me chanica l h eati ng. 4 . HT1 OFF du ring Heat 2 if th e uni t is confi gu red f or 2- Step m echa nical heatin g. 5 . HT2 OFF du ring Heat 3 if th e uni t is confi gu red f or 2- Step m echa nical heatin g.

St eps fo r opt ion al accessories and m odes n ot pr esent in u nit will be ski pped.

(1) Of f Off On On * *

(2) Of f Off On On * *

(3) Of f Off Of f On On

(4) Of f Off On On

(5) Of f On On

RT-SVD03G-EN 51

Page 52

Re l i a Te l Te st M o d e

Table 14. Odyssey Independent Circuit Heat Pump U nits 15-20 Ton

St e p Mod e I DM Eco n CPR1 CPR 2 HT 1 HT 2 SOV 1 SO V 2 OD M 1 OD M 2

1 Fan On On Min Off Off Off Of f Off Off Of f Off

2* Econ. On Op en Off Of f Off Off On On Off Off

3 Cool 1 On Min On Off Off Of f On On On Off

4 Cool 2 On Min On On Of f Off On On On On

5 Heat 1 On Min On Of f Off Off Of f Off On Off

6 Heat 2 On Min On On Of f Off Off Off On On

7* Heat 3 On Min On On On Off Of f Off On On

8* Heat 4 On Min On On On On Of f Off On On

9**DefrostOn MinOnOnOnOffOn OnOffOff

10 Em . Heat On Min Of f Off On On Of f Off Off Of f

* Wit h Optio nal Accessor y * * Defrost cy cle in t est m ode ru ns for at le ast 1 m inut e, up to 1 0 mi nu tes, depe nding on out door am bien t a nd out doo r coil t em per at ur e. St eps fo r opt ion al accessories and m odes n ot pr esent in u nit will be ski pped.

Table 15. Gas/ Electric Units 3-25 Ton

St e p M od e I D M Econ CPR 1 CPR2 HT1 H T2 Mod Ga s* O DM1 OD M2

1 Fan On On Min Of f Off Off Off Of f Off Off

2* Econ. On Open Off Of f Off Off Off Of f Off

3 Cool 1 On Min On On

4 Cool 2 On Min On On

5 Coo l 3 On Min On On Of f Off Off On * *

6* Reheat On Min On On Off Of f Off On * *

7* Heat 1 On Min Of f Off On Off 5 0% Off Off

8* Heat 2 On Min Of f Of f On On 1 00 % Off Off

* Wi th Op ti ona l Accessor y * * " Off " if OAT f alls below 60° F, " On" if OAT r ises abov e 6 5° F. Dur ing Rehe at , if the un it is con fig ur ed wit h 1 com pr essor , ODM2 is " Off " if the OAT fal ls

bel ow 70 F, "On" if t he OAT r ises abo ve 75 F.

1 . CPR2 ON d ur in g Cool 1 i f config ur ed for 3- Step Cooli ng; CPR1 OFF. 2 . CPR2 OFF du ring Cool 2 on a 3- Step Coo lin g uni t.

St eps fo r opt ion al accessories and m odes n ot pr esent in u nit will be ski pped.

(1) Off Of f Off On * *

(2) Off Of f Off On * *

Table 16. Voyager Commercial VAV Service Test w ith Reheat and Statitrac

Te st St e p MOD E

I GV/

VFD TEST

I GV/

VFD TEST

MI NI M UM

VENTI L ATI O N

ECONO

MI ZER

I GV /

( 1)

VFD

OPEN/ 10 0%

CLOSED / 0%

I N CONTROL

PO W ER

FAN Eco n*

OFF

ON MI N OFF MI N OFF OFF OFF OFF 0% 100% 0% OFF ON 4. 7k

ON 1 00 % ON 1 00 % OFF OFF OFF OFF 0% 100% 0% OFF ON 6. 8k

FAN( 2 )

OFF MI N OFF OFF OFF OFF 0% 100% 0% OFF ON 2 .2k

OFF MI N OFF OFF OFF OFF 0% 100% 0% OFF ON 3 .3k

EXH

EXHA US T

DAM PER*

COM P 1COM P

2 H1*H2*

Mod . Hea t *

Coo l Valve*Re h ea t

Valve *

Re h ea t Pu m p ou t *

52 RT-SVD03G-EN

VHR Re lay

( 3) O HMS

Page 53

ReliaTel Test M ode

Table 16. Voyager Commercial VAV Service Test w ith Reheat and Statitrac

COOL

11 Reset

* Wit h Opt ion al Feat ur e

1 . The I GV/ VFD w ill be con t rol led t o t he suppl y pr essu re set point u nle ss t est m ode h as been r unn in g f or 6 mi nu te s or lon ger. After 6 m inu tes, th e I GV

damp er w ill be a llowed t o drive t o 1 00% for st ep 9 and 1 0.

2 . The exh aust fan will tu rn on anyt ime t he econom izer da mp er po sit ion is equal t o o r great er tha n th e exha ust fan se tp oin t. It wil l n ot tu rn off unt il the

econ omi zer dam per p osit ion is at Exh aust Enable Setp oin t - 10 % or low er.

3 . The VHR r elay ou tpu t w ill be energ ize d a t the st art of t he t est m ode t o a llow ti me f or t he VAV b oxe s t o op en . It t ake s 6 m inu tes fo r th e b oxes t o dr ive

fr om th e fu ll cl osed p osit ion to th e ful l open position . The tim ing canno t be ch ang ed in t he f iel d.

4 . 27.5- 35 ton un it s h ave 2 st ages of m echan ical coo lin g. Bot h co mp re ssor s r un du ring cool st age 2 . 5 . The sup ply fan w ill not be allow ed to g o f ro m an of f st ate to an o n sta te unt il th e IGV ar e f ul ly clo sed . 6 . The con den ser f ans will op erate an y ti m e a com pr essor is ON p rovid in g t he outd oor air te mp er at ur es are w it hin nor m al operating rang e. 7 . The hea t out put s wi ll not be all owed to com e on u nt il t he u nit has been in t est m ode for at le ast 6 m in ut es and t he I GV/ VFD is at 10 0% . 8 . The re hea t pu mpou t ou tp ut wi ll be en erg ized w heneve r th e r ehea t cir cui t (cir cuit 2 for 40-5 0T) is ene rg ized f or Coolin g operat ion.

St eps fo r opt ion al accessories and m odes n ot pr esent in u nit will be ski pped.

I N CON-

STAGE

TROL

COOL

I N CON-

STAGE

TROL

COOL

I N CON-

STAGE

TROL

REHEAT*I N CON-

TROL

HEAT

OPEN/ 10 0%

STAGE 1*

(7)

OPEN/

HEAT STAGE

10 0%

(7)

(5) MI N OFF MI N ON( 6) OFF OFF OFF 0% 100% 0% OFF( 8) ON 10k

(5) MI N OFF MI N OFF(4 )

ON MI N OFF MI N ON

ON( 5) MI N OFF MI N OFF OFF

ON( 4)

OFF OFF 0 % 1 00 % 0% ON(8 ) ON 1 5k

(6)

(6) ON(6 ) OFF OFF 0% 10 0% 0% ON(8 ) ON 2 2k

(6) ON(6 ) OFF OFF 0% 50 % 50 % OFF ON 27 k

OFF 50 % 10 0% 0% OFF ON 3 3k

(7)

10 0% 1 00 % 0% OFF ON 47k

(7)

Table 17. CV Test Modes (Also VAV w/ o IGV) 27 1/ 2 - 50 Ton w ithout Reheat

TES T STEP MOD E SF Econ .*

1 MI NIMUM VENTI LATION ON Min OFF Min OFF OFF OFF OFF 0% 4 .7 k

3 COOL STAGE 1 ON Min OFF Min ON

4 COOL STAGE 2 ON Min OFF Min OFF

5 COOL STAGE 3 ON Min OFF Min ON

6 HEAT STAGE 1 ON Min OFF Min OFF OFF ON OFF 50% 33k

7 HEAT STAGE 2 ON Mi n OFF Min OFF OFF ON ON 1 00 % 47k

8 Rese t

1 . The exh aust fan will tu rn on anyt ime t he econom izer da mp er po sit ion is equal t o o r great er tha n th e exha ust fan se tp oin t. It wil l n ot tu rn off unt il the

ECONOMI ZER TEST OPEN

* Wi th Op ti ona l Fea tu re

econ omi zer dam per p osit ion is at Exh aust Enable Setp oin t - 10 % or low er.

St eps fo r opt ion al accessories and m odes n ot pr esent in u nit will be ski pped.

ON 10 0% ON 10 0% OFF OFF OFF OFF 0% 6.8 k

EXH FAN

PO W ER EX H

( 1)

DAM PER * COM P 1 COMP 2 H EAT 1 * HEAT 2 *

(2) OFF OFF OFF 0 % 10 k

(3) ON( 2)( 3) OFF OFF 0 % 1 5k

(2) ON(2) OFF OFF 0 % 2 2k

MOD HEAT * OHM S

Units with tw o heat exchangers (high heat models)

Heat St age 1 - The 2 st age bu rner run s hig h heat for 60 second s, then dro ps to low heat . Mo dul atin g gas heat stay s off.

Heat Stage 2 - The 2 stage burner stays on low. M odulating burn er co mes on and stays at 100%.

RT-SVD03G-EN 53

Page 54

Re l i a Te l Te st M o d e

Ta b l e 18. CV Te st m o d e s 2 7 ½ - 5 0 To n w i t h R e h eat

EXH

TES T STEP M ODE FAN

MI NI MUM

8 REHEAT ON Min OFF MI N ON

9 Reset

1 . The exh aust fan will tu rn on an yt ime t he econo mi zer da mp er po sit ion is equa l t o or gr eat er t han t he e xh aust fan setp oin t. It wil l n ot t ur n off un til t he

2 . The con den ser f ans will op erate an y ti m e a com pr essor is ON p rovid in g t he outd oor air te mp er at ur es are w it hin nor m al operating rang e. 3 . 27.5- 35 ton un it s h ave 2 st ages of m echan ical coo lin g. Bot h co mp re ssor s r un du ring cool st age 2 . 4 . The re hea t pu mpou t ou tp ut wi ll be en erg ized w heneve r th e r ehea t cir cui t (circu it 2 for 40 -50T) is ene rg ized f or Cooling o per atio n.

VENTI LA TI ON

ECONOMI ZER TEST OPEN

COOL STAGE 1

COOL STAGE 2

COOL STAGE 3

HEAT STAGE 1

HEAT STAGE 2

* With Opt ional Featu re

econ omi zer dam per p osit ion is at Exh aust Enable Setp oin t - 10 % or low er.

St eps fo r opt ion al accessories and m odes n ot pr esent in u nit will be ski pped.

ON Min OFF MI N OFF OFF OFF OFF 0% 1 00 % 0% OFF 2. 2k

ON 1 00 % ON 1 00 % OFF OFF OFF OFF 0 % 10 0% 0% OFF 3 .3 k

ON Min OFF MI N ON

ON Min OFF MI N OFF

ON Min OFF MI N ON

ON Min OFF MI N OFF OFF ON OFF 5 0% 1 00 % 0 % OFF 10 k

ON Min OFF MI N OFF OFF ON ON 1 00 % 10 0% 0% OFF 15k

ECON *

FAN

( 1)

EXH DAM PER

* CO MP 1 CO MP 2

(2) OFF OFF OFF 0 % 1 00 % 0% OFF 4. 7k

(3)

(2) ON( 2) OFF OFF 0 % 100% 0 % ON( 4) 8.2 k

(2) ON( 2) OFF OFF 0 % 50% 50% OFF 33 k

(2) ( 3)

HEAT

1 *

OFF OFF 0 % 10 0% 0% ON( 4) 6 .8 k

MOD

2 *

HEAT*

COO L VALV E*REH EAT

VALV E*

REH EAT PU M P OU T* OH MS

PO W ER

54 RT-SVD03G-EN

Page 55

Thermostats and Sensors

Programmable Zone Sensor

Programmable Thermostat

Remote Sensor

Mechanical Thermostat

BAS Sensor

Mechanical Zone Sensor

COMM3/4/LCI Interface required when using BAS Systems.

BAS System Tracker, Tracer

2 Wires Twisted Shields

MORN

DESIRED

HEAT

MON

A.M.

OCCUPIED

FAN

AUTO

Visible if Option 10 is Set to 1

PROGRAM

TIME

DAY ERASE

HOLD TEMP

MODE FAN

HEAT

COOL

FAN

AUTO ON HEAT

OFF

COOL

70 80

ReliaTel Refrigeration Module

7 Wires

AUTO T X2 Y2 W2 G WI/0 Y1 R

14 12

9 8

COMM3/4

2 Wires Twisted Shielded

2-3 Wires See Matrix

CANCEL

2 Wire

Remote Sensor

Mechanical Zone Sensor

2-10 Wires Required See Matrix Next Page

S Y S T E M

F A N

SERVICE

COOL

HEAT

SYS ON

HEAT

AUTO

OFF COOL

AUTO

Figure 22. Thermostat, Sensor and ICS layout

RT-SVD03G-EN 55

Page 56

Thermostats and Sensors

Table 19. Thermostat and Sensor Descriptions

Accessor y M od e l # Zo ne Se ns or M odu le D escr ipt ion

Heat/ Cool

BAYSENS10 6* Sing le Set Poi nt 4 1,2,3 ,4

ASYSTAT1 06 * Man ua l chan ge Over

BAYSENS10 8* D ual Se t Point

BAYSENS11 0* ASYSTAT1 11 *

BAYSENS11 9* ASYSTAT6 66 *

BAYSENS07 7* Rem ote Se nsor 2 1,2

BAYSENS13 5A ASYSTAT7 09 A

Man ual/ Aut o Chan ge Ov er

Du al Set Poin t w it h LEDs Ma nu al/ Aut o Change Ov er

Prog ram m abl e w ith Nigh t Set back and LCD I nd icat ors

Dig it al Du al Set po int wi th Ma nu al / Aut o Change overt

Hea t P um p

BAYSENS10 7* ASYSTAT1 07 *

BAYSENS10 9* ASYSTAT1 09 *

BAYSENS01 9* ASYSTAT6 66 *

BAYSENS07 7* Rem ote se nsor 2 1,2

BAYSENS03 1A

Sin gle Se t Point Man ual Chang e Over

Du al Set Poin t w it h LEDs Man ual/ Aut o Change Ov er

Prog ram m abl e w ith Nigh t Set back and LCD I nd icat ors

Dig it al Hea t Pum p Du al Set point wi th Man ua l/ Aut o Chan geover

VAV 2 7 ½ - 5 0 t on s

BAYSENS11 9*

BAYSENS02 1 VAV Set po int Pan el w/ LED’s 9 1, 2, 3, 4,6 ,7 ,8 ,9 ,10

Tr a cer / Tr a ck er I CS

BAYSENS07 3* Over ride Sen sor w it h Ov er ride / Can cel 2 1,2

BAYSENS17 4*

Prog ram m abl e w ith Nigh t Set back and LCD in dicat ors

Ove rr ide Sensor wi th Se tpoint an d Overr ide / Cancel

Re qui red # Con d ucto r s Te rm ina l Conn ect ions a t J6

5 1,2 ,3 ,4 ,5

10 1, 2, 3, 4, 5, 6, 7, 8, 9,10

3- 7

31,2,3

7, 8, 9, 10, 11 ,1 2, 14 ( 7- 10 ar e op ti on al)

1, 2, 3, 4,5 ,6 ,7 ,8 ,9,10 1, 2, 3, 4,5

1, 2, 3, 4,5 6, 7

1, 2, 3, 4,5 6, 7, 8, 9,10

7, 8,9 ,10 11 ,12 ,1 4 (7- 10 a re op ti onal)

1, 2, 3, 4,5,6 1, 2, 3, 4,5

7, 8,9 ,10 ,1 1,1 2,1 4 (7- 10 a re op ti onal)

56 RT-SVD03G-EN

Page 57

Thermostats and Sensors

BAYSENS006B/ ASYSTAT661B (obsolete)

Accessory Heat / Cool Zo ne Sensor Module (ZSM) single set point, manual chang e over.

Figure 23. BAYSENS006B/ ASYSTAT661B layout

Component Description

BAYSENS006B ASYSTAT661B

BAYSENS007B/ ASYSTAT662B (obsolete)

Accessory Heat Pum p Zo ne Sensor Module (ZSM ), si ngle set point, m anual change over.

Figure 24. BAYSENS007B/ ASYSTAT662B layout

Component Description BAYSENS007B ASYSTAT663B

TB1

MODE

COOL SETPOINT

COMMON

ZONE TEMP.

TB2

6 7

COMMON HEAT STATUS

RT-SVD03G-EN 57

Page 58

Thermostats and Sensors

Component Description

BAYSENS008B ASYSTAT663B

Component Description BAYSENS009B ASYSTAT664B

BAYSENS008B/ ASYSTAT663B (obsolete)

Accessory Heat / Cool Zo ne Sensor Module (ZSM), dual set point, manual / aut o chan ge over.

Figure 25. BAYSENS008B/ ASYSTAT663B

BAYSENS009B/ ASYSTAT664B (obsolete)

Accessory Heat Pum p Zone Sensor M odule (ZSM), dual set point , m anual/ aut o changeov er.

Figure 26. BAYSENS009B/ ASYSTAT664B

58 RT-SVD03G-EN

Page 59

Thermostats and Sensors

BAYSENS010B (obsolete)

Accessory Heat / Cool Zone Sensor Module (ZSM), dual set poin t w ith LEDs, m anu al/ auto change ov er.

Figure 27. BAYSENS010B Layout

Component Description

BAYSENS010B

BAYSENS011B (obsolete)

Accessory Heat Pum p Zone Sensor M odule (ZSM), dual set point w ith LEDs, manual/ auto chan geover.

Figure 28. BAYSENS011B Layout

Component Description

BAYSENS011B

RT-SVD03G-EN 59

Page 60

Thermostats and Sensors

Component Description

BAYSENS013C

Component Description

BAYSENS014C

BAYSENS013C (obsolete)

Accessory ICS (Tracer/Tracker/Com forTrac) Zone Senso r M odule (ZSM ), with override button, and override cancel button.

Figure 29. BAYSENS013C Layout

BAYSENS014C (obsolete)

Accessory ICS (Tracer/Tracker/Com forTrac) Zone Sensor M odul e (ZSM), with overri de button , set po int, and override cancel butt on. Three con ductors requir ed. Manufactu red by Sunne, introduced 08/ 95.

Figure 30. BAYSENS014C Layout

60 RT-SVD03G-EN

Page 61

BAYSENS016A Sensor w / plug (see: SENS-IN-12) Thermistor Sensor (OAS,

Component Description

Thermistor Sensor (OAS, SAS, RAS, MAS, CTS)

Part Number

SEN-0339

Component Description

BAYSENS017B ASYSTAT669A

SAS, RAS, CTS)

Ou tdoor A ir Se nsor : Located i n the condenser section, low er left corner. The com pressor access

panel has a slotted op eni ng to provide ai rf low across the sen sor. Standard with all ReliaTel controlled units.

Ret urn A ir Sensor: Fiel d or factory installed accessory. Located on the retur n air damper of the econom izer, used with com parative enthalpy control only.

Co il Tem pe rat u re Sensor: Lo cated i n a 3/8" copper tub e well, w hich is brazed to the low est circuit entering the outdoor coil (2-10 ton heat pumps only).

M ixed A ir Sensor: Field or factor y installed in the supply fan section, protrud ing throug h the fan housing.

D ischa rge A ir Se nsor : Fi eld or factor y in stalled in the supply f an section, usin g anaveraging tub e located downstream of th e heat section.

Figure 31. Thermistor Sensor

Thermostats and Sensors

BAYSENS017B/ASYSTAT669A (obsolete)

Accessory Zone Sensor Rem ot e. Tw o co nd uctor s req uired.

Figure 32. BAYSENS017B/ ASYSTAT669A Layout

RT-SVD03G-EN 61

Page 62

Thermostats and Sensors

TIME

PROGRAM

DAY

ERASE

HOLD TEMP

MODE

FAN

ROOMTEMP

AUTO

FAN

HEAT

COOL

MODE

COOL

OCCUPIED

Component Description

BAYSENS019* ASYSTAT666*

BAYSENS019* / ASYSTAT666* (CV 3-50 Ton) (Obsolete)

Accessory Heat/Cool, programmab le n ight set back Zone Sensor Modu le (ZSM), w ith LCD status / diagnosti c indicators.

Figure 33. Programm able night set back Sensor Module (ZSM)

BAYSENS031A/ ASYSTAT707A (Obsolete)

Accessory Digital Heat Pum p Zone Sensor Mo du le (ZSM ), Du al Set Poi nt, Manual/Auto Changeover.

Figure 34. BAYSENS031A/ ASYSTAT707A Layout)

Component Description

BAYSENS031A ASYSTAT707A

62 RT-SVD03G-EN

Page 63

Thermostats and Sensors

Component Description

BAYSENS032A

Component Description

BAYSENS035A ASYSTAT709A

BAYSENS0032A (CV 3-50 Ton) (obsolete)

Accessory Averaging, Rem ot e Zon e Sensor, Dual Thermi stors, Two conductor s required.

Figure 35. BAYSENS0032A Layout

BAYSENS035A/ AYSTAT709A (Obsolete)

Accessory Digital Heat/Cool Zone Sensor M odule (ZSM ), Dual SetPoint, M anual /Auto Changeover.

Figure 36. BAYSENS035A/ AYSTAT709A Layout

RT-SVD03G-EN 63

Page 64

Thermostats and Sensors

RT1 thermistor, 10 k at 25°C

Temperature setpoint Pot 5 , 1 k

Calibration Pot 1 (see )Note 1

Note 1:

Pot 1 is factory calibrated. Field adjustment voids warranty.

R6, 8.45 k

Auto

R1, 4.87 k

R2, 2.32 k

R3, 19.6 k

Heat

Off

Cool

Fan SW2

R4, 34.8 k

EM Heat

CR3

Green

LED Heat

LED Common

TB2

R9, zero

Signal common

Cool setpoint (CSP)

Zone temperature

TB1

Mode (Sys/Fan switch)

System SW1

Part Number – SEN01528

BAYSENS106*/ ASYSTAT106*

Accessory Heat / Cool Zo ne Sensor Module (ZSM) sing le set point , manual changeover. Fou r conductors r equired.

Figure 37. BAYSENS106A/ ASYSTAT106A

Note 1:

Pot 1 is factory calibrated. Field adjustment voids warranty.

Temperature setpoint Pot 5, 1 k

Fan SW2

RT1 thermistor, 10 k at 25°C

System SW1

Auto

Calibration Pot 1 (see )Note 1

R1, 4.87 k

R2, 2.32 k

R3, 19.6 k

R11, zero

R6, 8.45 k

Signal common

Cool setpoint (CSP)

Mode (Sys/Fan switch)

Cool

Off

Heat

Zone temperature

TB1

Part Number – SEN01515

BAYSENS107A/ASYSTAT107A

Accessory Heat Pum p Zone Sensor M odule (ZSM) single set point, manual changeover. Six conductors r equired.

Figure 38. BAYSENS107A/ASYSTAT107A

64 RT-SVD03G-EN

Page 65

Thermostats and Sensors

Signal common

Cool setpoint (CSP)

Calibration Pot 1 (see )Note 1

R7, 3.92 k

Note 1:

Pot 1 and Pot 2 are factor y calibrated. Field adjustment voids warranty.

Heat Setpoint (HSP)

R6, 8.45 k

Auto

R8, 3.92 k

Calibration Pot 2 (see )Note 1

R1, 4.87 k

R2, 2.32 k

R3, 7.68 k

R4, 19.6 k

Heat

Auto

Off

Cool

RT1 thermistor, 10 k at 25°C

Zone temperature

R11, zero

TB1

Mode (Sys/Fan switch)

Cool setpoint Pot 4, 1 k

Heat setpoint Pot 3, 1 k

System SW1

Fan SW2

Part Number – SEN01513

BAYSENS108A/ASYSTAT108A

Accessory Heat / Cool Zone Sensor M odule (ZSM) dual set point, manual / auto changeover. Five conductors r equired.

Figure 39. BAYSENS108A/ASYSTAT108A

BAYSENS109A/ASYSTAT109A

Accessory Heat Pum p Zone Sensor M odule (ZSM) dual set poi nt with LEDs, manual / auto changeover. Ten conductor s req uired.

Figure 40. BAYSENS109A/ASYSTAT109A

RT1 thermistor, 10 k at 25°C

Part Number – SEN01523

RT-SVD03G-EN 65

Note 1:

Pot 1 and Pot 2 are factory calibrated. Field adjustment voids warranty.

Cool setpoint Pot 4, 1 k

R7, 3.92 k

System SW1

Fan

Auto

SW2

Heat Setpoint Pot 3, 1 k

R8, 3.92 k

CR1

Red

R9, zero

Calibration Pot 1 (see )Note 1

R6, 8.45 k

Calibration Pot 2 (see )Note 1

CR2

Green

R1, 4.87 k

R2, 2.32 k

R3, 7.68 k

R4, 19.6 k

R5, 34.8 k

CR3

Green

CR4

Green

Signal common

Cool setpoint (CSP)

Mode (Sys/Fan switch)

Cool

Off

Auto

Heat

EM Heat

Zone temperature

Heat Setpoint (HSP)

TB1

LED Common

LED Heat

LED Cool

LED Sys_On

LED Service

Page 66

Thermostats and Sensors

RT1 thermistor, 10 k at 25°C

Calibration Pot 1 (see )Note 1

R7, 3.92 k

Note 1:

Pot 1 and Pot 2 are factory calibrated. Field adjustment voids warranty.

R6, 8.45 k

Auto

R8, 3.92 k

Calibration Pot 2 (see )Note 1

R1, 4.87 k

R2, 2.32 k

R3, 7.68 k

R4, 19.6 k

Heat

Auto

Off

Cool

CR2

Green

CR4

Green

CR3

Green

CR1

Red

LED Service

LED Heat

LED Common

LED Sys_On

LED Cool

R9, zero

Signal common

Cool setpoint (CSP)

Heat Setpoint (HSP)

Zone temperature

TB1

Mode (Sys/Fan switch)

System SW1

Fan SW2

Cool setpoint Pot 4, 1 k

Heat setpoint Pot 3, 1 k

Part Number – SEN01522

BAYSENS110A

Accessory Heat / Cool Zo ne Sensor Module (ZSM) dual set point w ith LEDs, m anu al / auto changeover. Ten conductor s req uired.

Figure 41. BAYSENS110A

BAYSENS077A

Accessory Zone Sensor Remote, used with all current zone sensors. Two cond uctors required.

Figure 42. BAYSENS077A

RT1 thermistor,

10K OHM AT 25 DEG C

Part Number – SEN01448

66 RT-SVD03G-EN

Zone Temperature

Signal Common

Page 67

Thermostats and Sensors

RT1 thermistor, 10K OHM AT 25 DEG C

Zone Temperature

Signal Common

Setpoint

Pot 2 (SEE NOTE)

Calibration potentiometer

Setpoint Potentiometer Pot 1, 1K OHM

R1, 1.5K OHM

Timed

override

on SW1

Cancel SW2

Timed

override

Part Number – SEN01447

BAYSENS073A

Accessory ICS (Tracker/Tracer) Zone Sensor Module (ZSM), w ith overrid e button, and override cancel button. Two conductor s required.

Figure 43. BAYSENS073A

R1, 1.5K OHM

Timed Override

Cancel SW2

On SW1

RT1 thermistor, 10K OHM AT 25 DEG C

Zone Temperature

Signal Common

Part Number – SEN01450

BAYSENS074A

Accessory ICS (Tracker/Tracer) Zone Sensor M odule (ZSM), wi th override button , set point, and override cancel button. Three co nductors requir ed.

Figure 44. BAYSENS074A

RT-SVD03G-EN 67

Page 68

Thermostats and Sensors

AM PM

DAYS

HOURS

Mo Tu We Th Fr SatSu

Ser vice in di cat or, filt er tim er, ke yp ad lock out, occu pa ncy in dicat or, t em por ar y ov er ride

Zo ne t em pe rat u re a nd set point t emper at u re

System set tings

Fan se t t in g s

Scheduli ng a re a/ day and cl ock

BAYSENS119A Programmable Zone sensor

Figure 45. BAYSENS119A

The BAYSEN S119A su per sedes the BAYSENS019C. The BAYSENS119A has th e sam e pro gr amm in g options and capabilities as the BAYSENS019C but also has im proved therm istors that i ncreases sensing accuracy and is still com patible with all equi pm ent using either UCP or Reliatel micro controls. The BAYSENS119A can be u sed w ith VAV, constant vol um e or heat pum p equipment.

Figure 46. Display wit h all the symbols appearing

68 RT-SVD03G-EN

Page 69

Table 20. Programmable zone sensor wiring diagram

3 – 2 5 to n packa ged

rooft ops

3 – 2 0 spl it

sy st em u nit s

Thermostats and Sensors

2 7. 5– 5 0 ton pa cka ge d

rooft ops

* CD / * CH / * SC/ * H C

UCP

cont rol

Se nsor

REMOTE SENSOR

(b )

I NPUT

REMOTE SENSOR

(b )

I NPUT

24 VAC INPUT

COMMUNI CATI ONS

(e )

COMMON

SERVI CE STATUS (UCM I NPUT)

SYSTEM STATUS (ON/ OFF I NPUT)

COOL STATUS (UCM I NPUT)

HEAT STATUS (UCM I NPUT)

AUX RELAY (CLOSED— UNOCCUPIED)

AUX RELAY (COMMON)

AUX RELAY (CLOSED— OCCUPIED)

(a) LTB an d LTB1 re fer to low- vol ta ge term ina l b oar ds w it h nu m bers 1– 20 an d two test t er m inals. ( b) Con ne ct an o pt io nal r em ot e sen sor ( p/ n BAYSENS01 7) to t er m ina ls S1 an d S2. Con ne ct t he sh iel d wi re ( dr ain

wi re ) fr om the shi eld ed cab le to t erm inal 1 1. (c) Conn ect t he 24 Vac po wer sup ply f ro m t he unit con tr ol ler t o te rm inals 1 1 an d 14. ( d) Use ter mi nal 15 on ol der 3– 25 to n V oyager un it s w ith lo w- vol tag e t er min al boar ds num be red 1– 18 wi th t wo

test t er m ina ls. (e) Dat a comm un icat ion betw een the u nit contr oller an d th e senso r is accomp lished b y a seri al link con nected

at t erm inal 1 2.

(c )

S2 Opt iona l r emo te sensor

S1 Opt iona l r emo te sensor

14 14

12 12 1 2 12 12 1 2

11 11 1 1 11 11 1 1

10 10 1 0 10 10 1 0

999999

888888

777777

( a)

LTB

(d )

The au xi lia ry r elay on t he sen sor i s f or m C, ra te d for 1 .2 5 A a t 30 Vac. It is

Re li aTe l

Con t rol J6

14 14 14 14

en ergize d during occ upied peri ods.

TT A/ TW A

Re li a Te l Con t r ol

YC* / TC* / T E*

UCP

cont r ol

( a)

LTB1

Re li aTe l

Con t rol J6

RT-SVD03G-EN 69

Page 70

Thermostats and Sensors

Error Codes

An error code i ndicates that technical assistance may be required.

Not e: On the disp lay, error codes toggle w ith the clock.

BAYSENS135A Non-Programmable zone sensor

Figure 47. BAYSENS135A

Heat failure Indicates th at there is an error in the heat ing system .

Cool failure In dicates that t here is an error in the cooling system .

Test m ode Indicates that the system is operatin g in test m ode.

Fan failur e In dicates that a f an failure has occurred and service is requir ed.

70 RT-SVD03G-EN

Page 71

Table 21. Reliatel and UCP w iring locations

11 2 4 V AC/V DC

10 (GROU ND )

7 COM M –

6 COM M +

5 HEAT S ETPOIN T (HS P)

4 SYS/FAN M OD E (M ODE)

3 SETPO INT

2 SIGN AL C OM MO N (C OM MO N)

1 ZON E TEM PERATU RE (ZON E TEM P)

Thermostats and Sensors

Fe atu re

de scri pti on BAYS ENS1 3 5 A

Zo ne

t em pe ra t ure

5 v olt co m m on

cooling

se t po in t

Sy st em / Fa n

Mod e

Hea t in g se t po in t

COM M+

COM M-

N A

Gr ou n d ( 24

VAC com mon )

2 4 V AC

11 1

22 2

33 3

44 4

55 5

6 (not used) NA NA

7 (not used) NA NA

8 (not used) NA NA

9 (not used) NA NA

10 1 1 20

11 1 4 14

Re li ate l RTRM t er mi nal

bl ock ( J6) p osit io n

UCP LTB scr ew

t er mi nal p osi t ion

A remote temperature sensor m ay be used w it h the BAYSENS135A but it w ill n ot display the rem ote temperat ure on the LCD screen.

Figure 48. BAYSENS135A

RT-SVD03G-EN 71

Page 72

Thermostats and Sensors

Error Codes

Main processor error Replace sensor.

Software ver sion co nflict Replace sensor.

Communi cation erro r Replace sensor.

Tem perature input outside valid operating range (32ºF–122ºF [0ºC–50ºC])

Lock Symbol

Indicates that th e keypad i s locked Th e lo ck sym bol appears if you try t o

Replace sensor if space temperature is within valid range.

adjust a setting that cannot be changed.

72 RT-SVD03G-EN

Page 73

High Temperature sensor Diagram

SENSING ELEMENT

MANUAL RESET BUTTON

Compressor 1 disabl e

Compressor 2 disabl e

Immediate shut dow n, Autom atic reset

24 VAC

TEST 1 TEST 2

Supply Sensor

240˚F

Return Sensor

135˚F

Component Description

BAYFRST001A

Part Number

CNT-0637 & CNT-0638

High Temperature Sensor

The high temperat ur e sensor accessory (BAYFRST001A) provides high limi t cutout with manual reset in ICS dev ice Tracer / Tr acker/Com fo rTrac/ Var iTrac system s. The sen sors ar e wi red to th e LTB5 and LTB6 in the cont rol panel. Jum per must be removed.

The sensor s may be used to detect excessi ve h eat in air cond itioning or ventilation ducts an d provide system shut down . Immediately after sensor opens, the associ ated un it will completely shut dow n. The sensors com e w it h case and cover, and mount dir ectly to the ductw ork. There are tw o sensors that are included in the accessory. Both sensors are factory set; o ne opens at 135° F and should be installed in the r etu rn air duct, the other opens at 240° F and sh ould be instal led in the supply duct.

Figure 49. High Temperature Sensor Diagram

Not e: This accessory can also be applied in Non-ICS application s. The w iring o n the unit is the

same. The unit will shut dow n im m ediately w hen the sensor opens.

To reset a sen sor w hich has op ened, push and r elease th e butt on protru din g through the cover. See reset button. Th e senso r t emperature m ust drop 25° F below . To r eset a sen sor which has opened, push and release the button pr otruding t hrough the cover. See reset button. The sensor tem perature mu st drop 25

Ther e are no field adjustments t hat can be m ade to the sensor; if a problem exists, the sensor m ust be replaced.

Part Number “ CNT-0637” = 135° F sensor. Part Num ber “ CNT-0638” = 240° F sensor.

RT-SVD03G-EN 73

Page 74

Operation w ith a Conventional Thermostat (Constant Volu m e)

The ReliaTel module has conven tional thermostat connections as w ell as Zone Sensor M odule connections. When a co nventi onal thermostat is control ling the unit, operat ion differs as foll ow s.

• Supply Ai r Tempering featu re is not available. If outdoor air is b eing introduced through the equipment, dischar ge ai r temperature m ay b e cold w hen not actively heating.

• Proportional Integral (PI) control i s not available.

• Zone Sensor Diagnostics are only availab le on the RTRM module on the J6 terminal s, instead of at the Zone Sensor in the space.

• Intelligent Fall-Back is not available. If a fail ure occurs in the device co ntrolling the equipment, operation w il l cease.

• Heat Pum p Sm art Recovery and Smart Staging i s not available. Heat Pum p op eration b ecom es more costly u nless the generic control bein g ap plied can accomplish thi s.

• Rem ot e Sensing Capabilities are not available on most mechanical therm ostats.

• Space Temperature Averaging cap abilities are not avail abl e on most mechan ical thermostats

• Built in N ight Set Back and Unoccupi ed Functions functio n differently w ith a co nventi onal mechanical thermostat.

• A built-in algo rithm wh ich al lo ws for autom atic reset of the discharg e air tem perature wh ile econom izing is not available.

Not e: 27½ to 50 VAV -Conventional therm ostat input ter minals are inactive.

The term inal stri p for attachi ng the therm ost at w ires is located o n the RTRM module in the control com partmen t. Th e pu rpose of each t erm inal is discu ssed i n t he n ext section. Customers occasionally r equire operati on with a conventional therm ost at rather than a zone sensor. In so me cases there is a preferen ce for a specific therm ostat model , and in ot hers t here i s reluctance to ad opt newer technol ogy that may no t be as w ell u nder stood as conventio nal therm ost ats.

In addition, non-Trane Building Contr oller s ty pi call y provide an int erface to HVAC equipment b ased on a convention al therm ostat interf ace. Units appli ed with th is type of controller need to accept conventional therm ostat input s.

Conventi onal thermostat signals represent direct calls for unit functi ons. In their sim plest ap plications, therm ostat contacts direct ly control contactors or other load switching devices. Thi s function provides inputs for the therm ostat signal s and processing t o enhance reliability and performance. Com pressor protection and reli abi lity enhancem ent functions (HPC, LPC, M inim um On/Off t im ers, etc.) all operate the same wh ether applied w ith zone sensor s or a conventional thermostat.

Logic is also provided to cause approp ri ate unit funct ions w hen inapp ropriate therm ostat signals are provided.

Sim ultaneous calls for heating and cooling wi ll be igno red (the uni t w ill not heat or cool). The supply fan w ill be turned on w ith a call for heating or cooli ng even if the fan request is not detected.

If the thermostat is im medi ately changed from a heat ing to a cooling call, or vice versa, there w ill be a f ive m inute delay befo re the new call w ill init iate. For u nits with modulating gas heat, see for a flow chart outlinin g operation with a conventional thermostat.

p. 77

74 RT-SVD03G-EN

Page 75

Operation w ith a Conventional Thermostat (Constant Volume)

Table 22. Thermostat signals

R 2 4VAC pow er to t herm osta t

Y1 Call f or co mpressor 1 o r first stage cool ing

Y2 Call f or co mpressor 2 o r 2nd st age coolin g

G Call for sup ply fan

W1 Call for hea t 1 ( for m odu lat ing gas, see

W2 Call for heat 2

Hea t p um p on ly :

X2 Call f or emerg ency heat

OSwitchover valve On = coo lin g, Of f = heat ing

Bias f or heat ant icipat ion for t hose m ech ani cal t her m ost ats that use t hi s f un ction

Table 23. Conventional thermostat – Gas/ Electric, Electric Heat:

I npu t/ con necti on Fu nction w h en en e rg ize d:

G ( fan)

Y1 (co mpressor 1 o r econ om ize r)

Y2 (co mpressor 2 or com pr essor 1 w hile econom izing)

W1 ( gas / elect ric h eat f ir st st ag e) 1

W2 ( gas / ele ctric heat 2 nd st age) 2nd st age heat ( if av ail able)

Fan runs continuousl y except d ur in g un occu pied mode ( see next p age )

Com pr esso r # 1 ru ns or economizer operates

Com pr esso r # 2 also r un s, or # 1co mpressor r uns while eco nom izin g

st age heat

Figu re 50, p. 7 7)

Table 24. Conventional thermostat – Heat Pump

I npu t/ con necti on Fu nction w h en en e rg ize d

Coo li ng m od e:

G ( fan)

O ( rev ersing v alv e durin g coolin g) Rever sing valv e i n cool m ode

Y1 + O ( fi rst stage coo lin g)

Y1 + Y2 + O ( 2nd st age cool)

Fan runs continuousl y except d ur in g un occu pied mode ( see next p age )

Com pr esso r # 1 ru ns or economizer operates

Com pr esso r # 2 also r un s, or # 1 com pressor r un s w hi le econ om izin g.

Hea ting m od e:

G ( fan)

Y1 (b ot h com pr esso rs 1st stage he at )1.Bot h com pre ssor s r un

Y2 (d ur ing h eat ing – nothin g happens)1.No cha nge

W2 ( ele ctric heat 2 nd st age) 2 nd st age (e lect ric) heat

X2 ( electr ic heat on ly ) Electric heat only – n o com pressors

1 . For un it s co nf igu re d w ith 2- St ep Mech ani cal Hea ti ng ( Ody ssey I nde pen den t Ci rcu it

He at Pum p) , Y1 wi ll co rr esp on d to a re quest fo r Com pr essor 1 oper ation and Y2 wil l cor re spond to a requ est f or Com pressor 2 op era ti on.

Fan runs continuousl y except d ur in g un occu pied mode ( see below )

T: (provides heat an ticipation signal for those mechanical th erm ostats that use thi s feature. If the therm ostat used does not have a “ T” term inal, disregard t his terminal.

Unoccupied m ode: If the therm ostat being u sed is program mable, it will have its ow n strategy for unoccu pied m ode and will control the unit directly. If a mechan ical therm ostat is being used,

RT-SVD03G-EN 75

Page 76

Operation w ith a Conventional Thermostat (Constant Volume)

a field applied ti me clock with relay contacts connected to J6-11 and J6-12 can ini tiate an unoccupied mode as follows:

Cont act s o pen: Norm al o ccupied operation.

Cont act s c losed: Unoccupied op eratio n as follows - Fan in auto mode regar dless of fan switch

position. Economizer closes except while econom izing regardless of m inimum position setting .

Cooling/Economizer Operation:

If unit does not have an econom izer, the Cool/Econ Stage 1 and Stage 2 wi ll call directly for mechanical cooling (compressor) stages. If the unit has an econom izer, t he Cool/Econ stages will function as foll ow s.

Table 25. Cooling/ Economizer Operation w ith Thermostat

Call for OK t o Eco no m ize ?

No On Off I nacti ve

No Of f On I nacti ve

No On On In act ive

Yes On Of f A ct ive O ff

Yes Of f On Act ive Off

Yes On On Ac t iv e

40 t o 50 to n CV on ly. Thi s u nit ha s 3 st ages of coo lin g if usi ng a zon e se nsor or binar y in puts as show n abov e. I f usin g a con vent ion al th er most at it has 2 st age s as follo w: Y1 = 1st st age Y1 + Y2 = 3 rd st age VAV The rm osta t input s ar e ign ore d on VAV u nit s.

Th e rmost at Y1

Th e rmost atY2Eco no m ize r

Coo li ng

Com pr essor St a gi ng Re que st

Com pr esso r Out put 1

Com pr esso r Out put 2

Com pr esso r Out put s 1 & 2

Com pr esso r Out put 1

76 RT-SVD03G-EN

Page 77

Operation w ith a Conventional Thermostat (Constant Volume)

Figure 50. M odulating Gas Heat Control Process

RT-SVD03G-EN 77

Page 78

Zone Sensor M odule Testing

Mechanical Zone Sensor Module

Temperature input

Terminals to read voltage: RTRM J6-1, J6-2

Read DC voltage with the sensor attached. If voltage does n ot appear to be correct, read the resistance of the circuit, then th e sensor itself, t o see if a problem exists in the sensor or the w iring. With the sensor not attached ther e should be 5.00 VDC at the terminals as shown below.

Problems to look for:

• Misw ire/sho rt/open

• Excessive resistan ce in circuit (corroded or loose connection)

• Sensor inaccurate (should be ± 2F of chart )

• Moisture in sensor (becomes accurate w hen dry)

• Induced voltage (hig h voltage w ires in same condui t)

Service Tips:

To check for ind uced v oltage, read AC vo ltage to gro und fro m each sensor wire. Shou ld b e less than 1 VAC.

Figure 51. ZSM Testing/ voltmeter display

RTRM J6

5.00

DC Volts

Heating Setpoint

Mode Input

Cooling Setpoint

Common

Zone Temperature

Table 26. Temperature Input

Te m p

Re si st ance

° F

( K ohm s)

40 26 .097 3 .6 13 54 17 .8 47 3 .203 68 12 .435 2 .7 70 82 8. 81 5 2 .3 42

41 25 .383 3 .5 85 55 17 .3 82 3 .173 69 12 .126 2 .7 39 83 8. 60 7 2 .3 12

42 24 .690 3 .5 57 56 16 .9 30 3 .142 70 11 .827 2 .7 08 84 8. 40 4 2 .2 83

43 24 .018 3 .5 28 57 16 .4 91 3 .111 71 11 .535 2 .6 77 85 8. 20 6 2 .2 53

44 23 .367 3 .5 00 58 16 .0 66 3 .080 72 11 .252 2 .6 46 86 8. 01 4 2 .2 24

45 22 .736 3 .4 71 59 15 .6 54 3 .050 73 10 .977 2 .6 16 87 7. 82 7 2 .1 95

46 22 .123 3 .4 42 60 15 .2 53 3 .019 74 10 .709 2.5 8 8 8 7 .6 45 2 .1 66

47 21 .530 3 .4 12 61 14 .8 64 2 .988 75 10 .448 2 .5 54 89 7. 46 8 2 .1 37

48 20 .953 3 .3 83 62 14 .4 86 2 .957 76 10 .194 2 .5 23 90 7. 29 5 2 .1 09

49 20 .396 3 .3 53 63 14 .1 19 2 .926 77 9. 94 9 2 .4 93 91 7. 12 7 2 .0 80

50 19 .854 3 .3 24 64 13 .7 62 2 .895 78 9. 71 0 2 .4 62 92 6. 96 3 2 .0 52

51 19 .330 3 .2 94 65 13 .4 16 2 .864 79 9. 47 7 2 .4 32 93 6. 80 3 2 .0 24

52 18 .821 3 .2 64 66 13 .0 78 2 .832 80 9. 25 0 2 .4 02 94 6. 64 8 1 .9 96

53 18 .327 3 .2 33 67 12 .7 52 2 .801 81 9. 03 0 2 .3 72 95 6. 49 7 1 .9 69

Volt s

Te m p

° F

Re si st ance

( K ohm s)

Volt s

Te m p

° F

Re si st ance

( K ohm s)

Volts

Te m p

° F

Re si st ance

( K ohm s)

Volts

78 RT-SVD03G-EN

Page 79

Setpoint input

Heating Setpoint

Mode Input

Cooling Setpoint

Common

Zone Temperature

RTRM J6

DC Vol ts

5.00

Zone Sensor Module Testing

Terminals to read voltage: RTRM J6-3 (cooling), J6-5 (heating), J6-2

Read DC voltage with Zon e Sensor M odule (ZSM) attached. If voltage read does not appear to be correct, read the resistance of the circuit, then t he ZSM itself, to see if a pr oblem exists in the ZSM or the wiri ng. With the ZSM not attached there should be 5.00 VDC at the term in als as show n. To check for induced volt age, read AC voltage to grou nd from each sensor w ire. Should b e less than 2VAC.

Table 27.

Se t po in t I n put s Re ad vo lt age at eit her loca tion

Cooling se tp oin t RTRM J6-3 ZSM te rm inal 3

Heati ng set poin t RTRM J6-5 ZSM term inal 5

Com m on RTRM J6- 2 ZSM t erm in al 2

Problems to look for:

• Misw ire/sho rt/open

• Excessive resistan ce in circuit (corroded or loose connection)

• Setpoint l ever inaccurate (should be +-2F of chart)

• Induced voltage (hig h voltage w ires in same condui t)

Table 28. Setpoint Inputs

Te m p

RT-SVD03G-EN 79

Re si st ance

° F

( K ohm s) D C V ol ts

op en

40 1. 08 41 2 .60 1 5 4 0 .8 166 2. 247 68 0 .53 90 1 .7 51 8 2 0 .2 663 1. 05 1

41 1. 06 56 2 .57 9 5 5 0 .7 958 2. 216 69 0 .51 95 1 .7 09 8 3 0 .2 468 0. 99 0

42 1. 04 72 2 .55 7 5 6 0 .7 751 2. 183 70 0 .50 00 1 .6 67 8 4 0 .2 273 0. 92 6

43 1. 02 87 2 .53 5 5 7 0 .7 544 2. 150 71 0 .48 05 1 .6 23 8 5 0 .2 079 0. 86 0

44 1. 01 02 2 .51 3 5 8 0 .7 337 2. 116 72 0 .46 10 1 .5 78 8 6 0 .1 884 0. 79 3

45 0. 99 18 2 .49 0 5 9 0 .7 142 2. 083 73 0 .44 16 1 .5 32 8 7 0 .1 689 0. 72 3

46 0. 97 33 2 .46 6 6 0 0 .6 948 2. 050 74 0 .42 21 1 .4 84 8 8 0 .1 495 0. 65 0

47 0. 95 48 2 .44 2 6 1 0 .6 753 2. 015 75 0 .40 26 1 .4 35 8 9 0 .1 301 0. 57 5

48 0. 93 63 2 .41 8 6 2 0 .6 558 1. 980 76 0 .38 32 1 .3 85 9 0 0 .1 106 0. 49 8

49 0. 9179 2 .39 3 6 3 0.6363 1 .9 44 77 0. 36 37 1.333 ( short ed / no po we r) 0. 00 0

50 0. 8994 2 .36 8 6 4 0.6169 1 .9 08 78 0. 34 42 1.280

51 0. 8787 2 .33 8 6 5 0.5974 1 .8 70 79 0. 32 47 1.226

52 0. 8580 2 .30 9 6 6 0.5779 1 .8 31 80 0. 30 53 1.169

5. 00 ( ope n cir cui t)

Te m p

Re si st ance

° F

( K ohm s) D C Vo lt s

53 0. 83 73 2 .2 78 6 7 0 .5 584 1. 792 81 0 .28 58 1 .1 11

Te m p

° F

Re si st ance

( K ohm s) D C Vo lt s

Te m p

° F

Re si st ance

( K ohm s) D C Vo lt s

Page 80

Zone Sensor M odule Testing

Mode Input

Terminals to read voltage: RTRM J6-4, J6-2

Read DC voltage with Zon e Sensor M odule (ZSM) attached. If voltage read does not appear to be correct, read the resistance of the circuit, then t he ZSM itself, to see if a pr oblem exists in the ZSM or the wiring . With the ZSM not attached th ere should be 5.00 VDC at t he term inals list ed above. To check for ind uced v oltage, read AC vo ltage to gro und fro m each sensor wire. Shou ld b e less than 2VAC.

Mod e I npu t :

Mod e I nput RTRM J6- 4 ZSM t ermina l 4

Com m on RTRM J6- 2 ZSM term ina l 2

Problems to look for:

• Misw ire/sho rt/open

• Excessive resistan ce in circuit (corroded or loose connection)

• Induced voltage (hig h voltage w ires in same condui t)

Table 29.

Volts Sy st em Sw it ch

Sho rt to com mon

OFF AUTO 2.32 0 .9 4

COOL AUTO 4.87 1. 64

AUTO AUTO 7.68 2 .1 7

OFF ON 10 .7 7 2 .5 9

COOL ON 13.3 2 2.85

AUTO ON 16 .13 3. 08

HEAT AUTO 19.48 3. 30

HEAT ON 27.9 3 3.68

EM HEAT AUTO 3 5. 00 3. 88

EM HEAT ON 4 3. 45 4. 06

Open circuit 5.00

Fa n sw it ch

Oh m s Rx 1 K

00.00

DC + -

5 %

80 RT-SVD03G-EN

Page 81

Programmable Zone Sensor BAYSENS119A and BAYSENS019C (Obsolete)

The BAYSENS019B, C Program mable Zone sensor is a digital disp lay sensor that com municates to micro controls. This prog ram mable sensor is co mpatible w ith the fol lowing constan t volum e (CV) units:

• Voyager UCP 3-25 tons

• Voyager UCP 27.5-50 tons CV

• Precedent ReliaTel 3-10 tons

• Voyager ReliaTel 12.5-25 tons

• Voyager ReliaTel 27.5-50 tons CV

• IntelliPak Rooftop 20-130 ton s CV

• Ody ssey ReliaTel 7.5-20 tons

For program m ing inf ormation, refer to literature ACC-SVN28A-EN.

Testing the Programmable Zone Sensor (PZS)

1. Verify unit o peration by r unning u nit through test m ode.

2. Verify that th e PZS has a norm al disp lay of time, t emperature, fan and system statu s.

3. For UCP M icro , disco nnect wi res from LTB-11 (-) and LTB-12 (+); For Reli aTel co ntr ols, disco nnect wires from J6-11 and J6-12. Measure the d c voltage betw een term inals 11 and 12. Voltage should read betw een 28 to 32 vdc. If no voltage is presen t for UCP m icro, check wiring between UCP and LTB.

4. Reconnect wires to t erm inals 11 an d 12. M easure the voltage b etw een 11 an d 12 agai n. Voltage should flash at 0.5 second r ate, w ith a voltage value random ly chang ing from appr oxim ately 24 to 32 vdc.

5. On the PZS, pr ess the FAN button to turn the fan ON. If the fan com es on, the PZS is good; if the fan does not come o n, the PZS may be defect ive and will need to be replaced.

Not e: Th e sensor wi ll n ot co mm un icate i f th e wr ong baud rate i s selected . The PZS is shipp ed w ith

the baud rate set t o 1200. See Option M enu setup in the literatu re to verify proper baud rate. The baud rate m ay need to be changed to 1024 for units bui lt before 1/96.

Zone Sensor Module Testing

Troubleshooting the Programmable Zone Sensor

Because the PZS is a comm unicating sensor, troublesho oting is very limited. Steps 2 through 5 of test ing the sen sor ar e the f ir st step s to v erif y. The follo wi ng t able w il l prov ide o ther tro ubl eshoo tin g tips for diagnosin g the sensor and unit o per ations.

If all w iri ng and prelim inary tests do not ind icate any defects, disconnect t he PZS from the wal l and take to the unit, and with a short (approx. two feet) length of therm ostat wire, conn ect the PZS and see if sym pt om s still exist. If not, check for therm ostat w ire routin g in close pr oxim it y of high voltage wires and flu orescent lig hts.

RT-SVD03G-EN 81

Page 82

Zone Sensor M odule Testing

Table 30. Troubleshooting

Sy m pto m Pr oba ble Ca use a nd s ol ut ion

Display does n ot come on. Check for 2 4 vac on t erm inal s 1 1 an d 12 of t he sensor.

No com mu nicat ion w it h u nit.

Sen sor is comm uni cat in g, but u nit won’t ru n Check opt ion 18 i n Opt ion Menu set up for correct bau d rate.

Displayed zo ne t em perat ur e is di ff erent f rom act ua l temp eratur e.

Zon e temp eratur e i s n ot d isplayed Che ck option select ion in Opt ion m enu set up

Displayed zone temper at ur e r eads "9 9" .

Displayed zo ne tem perat ur e r eads Sh an d th e COOL FAI L icon is illum ina te d.

Displayed zo ne tem per at ur e reads oPand t he COOL FAI L icon is illum ina te d.

Prog ramm able sensor wil l not re spond to keyp ad select ion s

Fan mo de is set t o on , b ut does not r un dur ing un occu pied mode. Per iod s

Buz zer in dic at es Sy st em Fail ur e, Check f ilt er o r ser vi ce is req uired .

sen sor w ill n ot h old o ver ride ch an ges.

COOL FAI L fl ashes an d u nit do esn’ t run. Check fo r var yin g vol ta ge on t er mina ls.

COOL FAI L + H EAT FAI L i con s f lash sim ult aneously

HEAT FAIL fl ash ing

Veri fy a v ary ing volt age per st ep 2 of testing the senso r. If no vo lt age is pr esen t, check with w iring t o un it .

Follo w Opt ion Menu se tup i n l iteratu re to calibr ate t he disp lay.

Spa ce tem p er at ur e i s a bov e o r bel ow t he m ea sur abl e r an ge of the sen sor.

Ver ify t ha t opt io n 11 in Op ti on Menu i s se t cor rec tl y. I f co rr ect , che ck t he wir ing from th e r em ot e senso r at ter mi nal s S1 an d S2 fo r a shor t ed con dition.

Ver ify t ha t opt io n 11 in Op ti on Menu i s se t cor rec tl y. I f co rr ect , che ck r em ot e sen sor w ir in g at te rm i nal s S 1 and S2 for an op en cir cuit con di ti on.

Check low er left corn er of disp lay f or a pa dlo ck ico n. I f displa yed , pr ess and h old t he Tim e (+ ) and ( -) ke y un ti l th e ico n goe s away.

Chec k opt io n 6 i n Opt ion m en u set up fo r A ut o s elect io n dur in g un occu pie d.

Press erase key t o r eset f ilt er laps e t im er. B uzzer w ill be rese t un til noo n of t he next d ay if a sy st em f ail ur e h as not bee n cor re cted.

Press t he HOLDTEMP but to n w ithin 20 seconds af ter chang es ar e m ade.

Sen sor not co mm un icat in g w it h u nit . 11 an d 1 2 a t th e unit . If vo lt age is st eady at a pprox im ate ly 30 vdc, check for ope n cir cuit in w ir in g.

Check for d efective ou t side air sen sor. Eme rg ency inp ut i s open. ( RTRM v ersion 4 .0 )

Coil Tem p Sensor fa il (HP).

A h eat failu re has o ccur red. I f HP u ni t, th e u ni t m ay be in em ergency heat, o r ther e is a d efrost pr ob lem .

82 RT-SVD03G-EN

Page 83

RTRM / RTOM (Temperature Inputs)

Outdoor Air Sensor, Discharge Air Sensor, Coil Temperature Sensor

Terminals to read voltage:

Outdoor Air Sensor — RTRM J8-2, J8-1

Discharge Air Sensor — RTOM J4-5, J4-4

Coil Tem perature Sensor 1 — RTRM J2-3, J2-4

Coil Tem perature Sensor 2 — RTRM J9-2, J9-1

Not e: These are RTRM, RTOM inputs only. Economizer inputs (M AS, RAS, OHS, RHS, CO2) are in

the ReliaTel Econom izer inp uts section.

Service Tips:

The second sensor term inal listed above is com m on. All comm on term in als are grounded, therefore one volt m eter lead can be attached to ground for voltage tests. To check for i nd uced voltage, read AC voltage to ground fr om each sensor wire. Should be less than 1 VAC.

Problems to look for:

• Misw ire / short / open

• Excessive resistan ce in circuit (corroded or loose connection)

• Sensor inaccurate (should be +- 2F of chart )

• Moisture in sensor (becomes accurate w hen dry)

• Induced voltage (hig h voltage w ires in same condui t)

Table 31. Temperature Input

Te m p

Re sistan ce

° F

( K ohm s) D C V olt s

-40 345.684 4.856 -20 16 9. 79 8 4 .7 18 1 84 .5 37 4 .4 68 21 45.354 4 .094

-39 333.237 4.851 -19 16 4. 07 6 4 .7 09 2 81 .8 68 4 .4 53 22 44.007 4 .072

-38 321.274 4.845 -18 15 8. 56 2 4 .7 3 79.291 4. 43 7 23 42.705 4 .049

-37 309.777 4. 84 - 17 15 3. 24 8 4. 69 4 76 .8 02 4 .421 24 41 .4 46 4 .0 26

-36 298.724 4.834 -16 14 8. 12 7 4 .6 80 5 74 .4 03 4 .4 04 25 40.226 4 .002

-35 288.097 4.828 -15 14 3. 19 2 4 .67 6 7 2. 087 4 .3 88 26 39 .0 46 3 .9 78

-34 277.879 4.823 -14 13 8. 43 5 4 .66 7 6 9. 849 4 .3 71 27 37 .9 04 3 .9 54

-33 268.053 4.816 -12 12 9. 44 9 4 .6 38 8 67 .6 87 4 .3 53 28 36.797 3 .929

-32 258.603 4. 81 - 11 12 5. 19 9 4 .6 27 9 65 .5 97 4.3 36 2 9 35.726 3 .9 04

-31 249.523 4.804 -10 1 21 .1 4 .6 15 10 63 .577 4 .317 30 34 .6 89 3 .8 79

-30 24 0. 81 4.7 97 -9 11 7. 146 4. 60 3 11 61 .6 24 4.2 99 31 33 .6 86 3 .8 53

-29 232.425 4. 79 - 8 11 3. 33 1 4 .5 91 12 59.737 4.28 32 32. 72 3 .8 27

-28 224.355 4.783 -7 10 9. 65 2 4 .579 13 57 .9 13 4 .261 33 31 .7 97 3 .801

-27 21 6. 59 4.7 76 -6 10 6. 102 4. 56 6 14 56 .1 53 4.2 41 34 30 .9 03 3 .7 75

-26 209.114 4.768 -5 10 2. 67 6 4 .553 15 54 .4 52 4 .221 35 30 .0 37 3 .749

-25 201.918 4. 76 - 4 99 .3 77 4 .5 4 16 52 .8 07 4.2 01 36 29.198 3 .722

-24 194.991 4.752 -3 96 .1 97 4 .5 26 17 51.216 4.18 37 2 8. 38 6 3.695

-23 18 8. 32 4.7 44 -2 93 .1 27 4 .512 18 49 .6 77 4 .159 38 27 .5 99 3 .6 68

-22 181.904 4.736 -1 90 .1 63 4 .4 98 19 48.188 4 .138 39 26 .8 36 3 .641

-21 175.738 4.727 0 87. 30 1 4 .4 83 20 46.748 4 .116 40 26 .0 97 3 .613

RT-SVD03G-EN 83

Te m p

Re si st ance

° F

( K ohm s) D C Volt s

Te m p

° F

Re si st ance

( K o hm s) DC V ol t s

Te m p

° F

Re si st ance

( K ohm s) D C V olt s

Page 84

RTRM/ RTOM (Temperature Inputs)

Table 31. Temperature Input (continued)

Te m p

Re sistan ce

° F

( K ohm s) D C V olt s

41 2 5. 38 3 3 .5 85 85 8. 206 2. 253 1 29 3. 10 4 1. 18 5 1 73 1. 33 1 0. 58 8

42 24 .6 9 3 .5 57 8 6 8.014 2.224 1 30 3. 041 1.166 1 74 1. 30 8 0. 579

43 2 4. 01 8 3 .5 28 87 7. 827 2. 195 1 31 2. 98 1.148 1 75 1. 284 0.5 7

44 2 3. 36 7 3. 5 88 7.645 2. 166 132 2.919 1. 13 176 1 .2 61 0 .5 61

45 2 2. 73 6 3 .4 71 89 7. 468 2. 137 1 33 2. 86 1 1. 11 3 1 77 1. 23 9 0. 55 2

46 2 2. 12 3 3 .4 42 90 7. 295 2. 109 1 34 2. 80 4 1. 09 5 1 78 1. 21 7 0. 54 3

47 21 .5 3 3 .4 12 9 1 7.127 2 .08 135 2. 74 8 1. 07 8 179 1. 19 6 0. 53 5

48 2 0. 95 3 3 .3 83 92 6. 963 2. 052 1 36 2. 69 3 1. 06 1 1 80 1. 17 4 0. 52 6

49 2 0. 39 6 3 .3 53 93 6. 803 2. 024 1 37 2. 64 1.045 1 81 1. 154 0 .5 18

50 1 9. 85 4 3 .3 24 94 6. 648 1. 996 1 38 2. 58 7 1. 02 8 1 82 1. 13 3 0. 51

51 19 .3 3 3 .2 94 9 5 6.497 1.969 1 39 2. 536 1.012 1 83 1. 11 3 0. 502

52 1 8. 82 1 3 .2 64 96 6 .3 5 1 .9 42 140 2 .4 86 0 .9 96 184 1 .0 94 0 .4 94

53 1 8. 32 7 3 .2 33 97 6. 207 1. 915 1 41 2. 43 8 0. 98 1 1 85 1. 07 6 0. 48 7

54 1 7. 84 7 3 .2 03 98 6. 067 1. 888 1 42 2. 39 0.965 1 86 1. 057 0 .4 79

55 1 7. 38 2 3 .1 73 99 5. 931 1. 861 1 43 2. 34 3 0. 95 1 87 1. 038 0 .4 71

56 16 .93 3 .1 42 100 5.798 1.835 1 44 2. 29 8 0. 935 1 88 1. 02 0.464

57 1 6. 49 1 3 .1 11 10 1 5 .6 68 1 .8 09 145 2 .2 53 0 .9 2 18 9 1.003 0.457

58 1 6. 06 6 3.0 8 1 02 5. 543 1. 783 1 46 2. 21 0.906 1 90 0. 986 0.4 5

59 1 5. 65 4 3.0 5 1 03 5. 42 1.757 1 47 2. 167 0. 891 1 91 0. 96 9 0. 44 3

60 1 5. 25 3 3 .0 19 10 4 5. 3 1 .7 32 148 2 .1 25 0 .8 77 19 2 0.9 52 0 .4 36

61 1 4. 86 4 2 .9 88 10 5 5 .1 84 1 .7 07 149 2 .0 85 0 .8 63 193 0 .9 37 0 .4 29

62 1 4. 48 6 2 .9 57 10 6 5 .0 7 1.6 82 1 50 2.044 0.849 1 94 0. 92 0 .4 22

63 1 4. 11 9 2 .9 26 10 7 4 .9 59 1 .6 58 151 2 .0 06 0 .8 36 195 0 .9 05 0 .4 16

64 1 3. 76 2 2 .8 95 10 8 4 .8 51 1 .6 33 152 1 .9 67 0 .8 23 196 0 .8 9 0. 41

65 1 3. 41 6 2 .8 64 10 9 4 .7 45 1 .6 09 153 1.9 3 0. 81 1 97 0.8 75 0.4 03

66 1 3. 07 8 2 .8 32 11 0 4 .6 42 1 .5 85 154 1 .8 94 0 .7 97 198 0 .8 6 0.397

67 1 2. 75 2 2 .8 01 11 1 4 .5 42 1 .5 62 155 1 .8 59 0 .7 84 199 0 .8 46 0 .3 91

68 1 2. 43 5 2.7 7 1 12 4. 444 1. 539 1 56 1. 82 3 0. 77 2 2 00 0. 83 1 0. 38 5

69 1 2. 12 6 2 .7 39 11 3 4 .3 49 1 .5 16 157 1 .7 89 0 .7 59 Short ed or no power 0

70 1 1. 82 7 2 .7 08 11 4 4 .2 56 1 .4 93 158 1 .7 56 0 .7 47

71 1 1. 53 5 2 .6 77 11 5 4 .1 65 1. 47 15 9 1.7 23 0.736

72 1 1. 25 2 2 .6 46 11 6 4 .0 76 1 .4 48 160 1 .6 91 0 .7 24

73 1 0. 97 7 2 .6 16 11 7 3 .9 9 1.4 26 1 61 1.659 0.712

74 1 0. 70 9 2 .5 85 11 8 3 .9 06 1 .4 05 162 1 .6 29 0 .7 01

75 1 0. 44 8 2 .5 54 11 9 3 .8 24 1 .3 83 163 1 .5 99 0 .6 9

76 1 0. 19 4 2 .5 23 12 0 3 .7 43 1 .3 62 164 1.5 7 0.688

77 9. 949 2 .4 93 121 3.665 1.341 1 65 1. 54 1 0. 679

78 9. 71 2 .4 62 122 3.5 89 1.3 21 1 66 1.512 0.658

79 9. 477 2 .4 32 123 3.514 1.301 1 67 1. 48 5 0. 647

80 9. 25 2 .4 02 124 3.4 42 1.2 81 1 68 1.458 0.637

81 9. 03 2 .3 72 125 3.3 71 1.2 61 1 69 1.432 0.627

82 8. 815 2 .3 42 126 3.302 1.241 1 70 1. 40 6 0. 617

83 8. 607 2 .3 12 127 3.234 1.222 1 71 1. 38 0 0. 607

84 8. 404 2 .2 83 128 3.169 1.204 1 72 1. 35 6 0. 598

Te m p

Re si st ance

° F

( K ohm s) D C Volt s

Te m p

° F

Re si st ance

( K o hm s) DC V ol t s

Te m p

° F

Re si st ance

( K ohm s) D C V olt s

84 RT-SVD03G-EN

Page 85

Zone Sensor Averaging

BAYSENS077* BAYSENS077*

12 12

In some applications, 1 zone sensor does n ot give a good representation of zone temp erature. The internal therm istors, 10K ohm resistance @ 25C/77F, can be wired as shown bel ow in order to pr ovide an averag e inp ut t o th e mechan ical or prog ram mable Zo ne Senso r M odule BAYSENS106ABAYSEN S111A/ASYSTAT106-109, ASYSTAT111, BAYSENS019* /AYSTAT666* . If using a Program m able ZSM , th e rem o te sensor wiring m ust be tw isted/shielded. Con nect the shield to terminal J6-11.

Figure 52. Zone Sensor Averaging

RT-SVD03G-EN 85

Page 86

COM M3/ 4 Interface Operation & Troubleshooting

COM LINK b oard

show n in

"No n-iso lated

COMM 3 or

COMM 4 positi on"

Comm unicat ion wi ring

DIP Swit ches

LED's

Shiel d

taped

back

COM LINK board show n

in " Isolat ed COM 3"

posi tio n

To o pti ons

mo dul e &

econo mi zer

Zone Sen sor used w ith Tracker and Tracer

Setpo int

Zone

tem peratur e

RTRM

This h arness label ed 4366-1151, is sup plied w ith t he COMM 3/4 interf ace

TB1

TX RX

Wiring:

The COM M3/4 board com m unicates w ith the RTRM vi a the MODBUS link using the har ness, labeled 4366-1151. The connections t o the board are show n below.

Communication w ir es m ust be twisted/shielded as sp ecif ied by the BAS syst em being applied. Do not attach th e shield to the COM M3/4 board. It m ust be taped back to prevent i t f rom touching the unit.

LED’s:

Am ber receive (RX) LED: Blinks whenever com m unication is occurring w ith any d evice. This tells the service technician t hat the BAS system is communicating or trying to com m un icate with other devices as w ell as this one.

Green tran smit (TX) LED: Blinks once ev ery sev eral seco nds, sometimes u p to 45 seconds bet ween blinks, when the unit is sendi ng data to the BAS system. This tell s the service technician that this unit is com m unicatin g informat ion to the BAS system . When the TX LED is blinking, t he unit is com m unicating.

Communication problems:

Figure 53. Troubleshooting Outline

Won’t communicate with Tracker 3-25 Ton only

• Harness, labeled 4366-1151, m ust be plugged into RTRM correctly – see previous page.

86 RT-SVD03G-EN

• Com Link boar d m ust be i n “ ISOLATED COM 3” position . If it is in the w rong position or not installed, the u nit w ill n ot com m un icate.

• Each u nit mu st hav e a uni que addr ess by setti ng t he DIP swi tches accor din g to the IOM . If 2 u nit s hav e the sam e address, neith er will commu nicat e. If the unit has a DIP switch set ting ot her than the ones specified in the IOM, Tracker will not r ecognize it.

• Once the unit com m unicates w ith Tracker, the Tr acker panel w ill autom atically recognize the unit.

• Resistor m issing at last u nit in daisy chain (depending on len gth of line run).

Page 87

COMM 3/ 4 Interface Operation & Troubleshooting

Won’t communicate with Tracer SUM M IT:

• Harness, labeled 4366-1151, m ust be plugged into RTRM correctly – see above.

• Com Link board must be in “ NON ISOLATED COM M3 or COMM 4” posi tion. If it is in the wron g position or not installed, the uni t w ill not com m unicate.

• Each u nit mu st hav e a uni que addr ess by setti ng the DIP switches acco rdi ng t o th e IOM. If 2 uni ts hav e the sam e address, neith er will commu nicat e. If the unit has a DIP switch set ting ot her than the ones specified in th e IOM , Tracer w il l n ot recognize it.

• Once the unit commu nicates w ith Tracer, the Tracer panel will autom atically recogni ze the unit.

Won’t communicate with VariTrac CCP zoning system:

• Harness, labeled 4366-1151, m ust be plugged into RTRM correctly – see above.

• Com Link board must be in “ NON ISOLATED COM M3 or COMM 4” posi tion. If it is in the wron g position or not installed, the uni t w ill not com m unicate.

VariTrac I Comfort M anager and VariTrac II Center Control Panel:

• The DIP switches must all be in the ON p osition. If not, the VariTrac CCP will not recognize it.

• The co mmunication w ir es must be in the sam e daisy chain link as the dam per s.

• VariTrac III central control panel (optional touch screen ) — All DIP switches must be in th e off position. If not, the VariTrac CCP will not r ecognize it.

Communicates but w ill not run, even in TEST mode:

• Emergency sto p input i s open (RTRM 3J1-12).

Communicates but w ill not run; fan (but not heating or cooling) runs in TEST mode for 40 seconds only:

3-25 Tons.

• Fan proving circuit (RTOM 5J7-6) is clo sed; should open w hen fan is on. If n ot, the fan will ru n in TEST mode for 40 secon ds and then stop.

27½-50 Tons.

• Fan proving circu it (RTOM 5J 7-6) is opened; sh ould close when fan is on. If not, the fan w ill run in TEST mode for 40 secon ds and then stop.

Communicates but w ill not run compressor(s); fan and heating run in TEST mode:

• Compressor disable ci rcu it(s) (RTRM 3J 1-8, 3J3-2) open due to loss of charge or LTB jumper rem oval.

Communicates but w ill not run compressors, yet everything runs in TEST mode:

• FROSTAT circuit (RTOM 5J7-2) is closed; should open wh en indoor coil is frost free. Prio r to RTRM v 8.0, there is no d iagnostic output w hen this occurs.

• 27.5-50 Tons Vari Trac CCP w ith constant volum e unit with bypass VAV: Unit m ust hav e a discharge air sensor in stalled at RTOM J4-4, J4-5.

RT-SVD03G-EN 87

Page 88

Direct Spark Ignition Control (Texas Instruments, 3-10 Ton Units only)

This microprocessor based, com mu nicating solid state device provides gas valve contr ol, proof of ignition, ignition r etries, 1 hour reset, operation of t he i nducer and diagnostics th ro ugh an LED as w ell as comm unicati on to the ref rigeration modul e. Inputs to the control in clude a pressure switch, rollout sw itch and limit sw itch as w ell as a flame proving ci rcuit.

This device takes cont rol of the ignition, tim ings related to the ig nition cycle, and su pervision of the gas com ponents.

The RTRM controls al l functions via a M ODBUS communication link.

The remote flam e sensor is located on the top burner w hich ensures that all burners are lit. Field measured flam e sensor voltage can v ary significantly d ue to the co nstruction of typical vol tmeters used.

The control has a 20 second pre-purge cycle as w ell as a 60 second inter-purge betw een cycles should a flam e not be established o n the first try.

Table 32. Ignition M odule Specificat ions

Volt ag e r an ge 18 - 32 VAC, 50/ 60Hz

Power consum pt ion 350mA @ 2 4v ac

Spa rk Vol ta ge 25 ,000 vol ts m ax @ 10 -1 3 m J

Flam e sen se vo lt age Nom inal 90 Vrm s

Flam e sen se sig nal

Pre- pur ge 20 se conds

Post- pur ge 5 Seconds

I nt er- pur ge 60 secon ds

Flam e establishm ent p eriod 2 t o 7 secon ds

Flam e failu re r esponse t im e 0.8 secon ds

Loss of flam e lo cko ut 3 t ries, lo cks ou t af te r 3r d tr y

Lock out re set I nt err upt pow er for 3 seconds m inim um

Aut o r eset 1 hour

Loss of comm unicat ion lock out (wit h RTRM) 10 seconds

Nom inal 4 .5 m icro a mps, m in im um 1.2 m icr o am ps

The igniti on modu le has a green LED for diagnostics:

Table 33. Ignition M odule Diagnostics

St ead y lig ht Mod ule is powere d up, b ut no act ive cal l f or h eat .

Bli nk ing a t con ti nu ous st eady ra te Act iv e call for heat.

One bl ink Lo ss o f com mu nicat ion .

Two bli nk s Sy stem lockout ( fail ur e to ig nite, no spa rk , low /n o gas pr essu re, etc.

Thr ee bl inks

Four b lin ks

Five blin ks

Six b lin ks

Sev en blink s

88 RT-SVD03G-EN

Press ur e sw it ch ( no v en t air f lo w, ba d CBM, clos ed at i nit ia l c all fo r he at ). Aut o r eset . ( Appl icab le to 3 - 10 t on s u nits on ly.)

Hig h lim it ( ex cessi ve he at in com bu st ion ch am be r, l ow ai rf low ). Auto re set .

Flam e sen sed an d gas valve not en ergized o r flam e se nsed a nd no ca ll fo r hea t.

Flam e r ol lou t ( CBM fa ilu r e, i nco rr ec t ga s p r essu re , in cor r ect p r im ar y a ir ) . Requ ire s m anu al rese t of the sw itc h. (Ap plic able to 3- 10 t ons un its onl y)

W1 & W2 sw apped (el ectrome chan ical 3- 10 tons units) . ReliaTel mo dul e will com mu ni cat e a h eat fail dia gnost ic back to t he RTRM.

Page 89

Direct Spark Ignition Control (Sequence of Operation, 310 Ton Units Only)

1-stage units

Ignition control (IGN) ru ns a self check (includ ing verificat ion that the gas valve is de-energized). IGN checks the high lim it sw itch (TCO 1) for closed contacts, the pressure sw itch (PS) for open contacts, flame rollout (FR) for closed contacts.

IGN energizes inducer blo wer. When PS closes, 20 second pre-purge begins. After 20 seconds, th e IGN energizes the spark and gas valve at the sam e tim e. The spark w ill stay energ ized for at least 2 secon ds attem pting to establish flame. If a fl ame is not establish ed, the spark w ill continu e up to 7 secon ds. Once a f lam e is estab lish ed, spar k is de-en ergized and ind oor blo wer m oto r (IBM ) tim in g begins. 45 second s later, the RTRM energizes the IBM. W hen the zone sensor or therm ostat is sati sfied, the gas valve is de-energi zed , the inducer runs fo r 5 seconds then stops (post-p urg e), and the IBM runs for 60 seconds then stops unless being req uested to run continuously.

2-stage units

Ignition control (IGN) ru ns a self check (includ ing verificat ion that the gas valve is de-energized). IGN checks the high lim it sw itches (TCO 1 & TCO 2) for closed contacts, t he pressure sw itch (PS) for open contacts, flam e rollout (FR) for closed con tacts.

IGN en ergizes inducer blower on high speed. When PS closes, 20 second (15 seconds on high, 5 seconds on low) pre-purge begi ns. After 20 secon ds, the IGN energizes the spark and gas val ve at the same time. The spark w ill stay energized fo r at least 2 seconds attempting to establish flam e. If a flam e is not established, the spark w ill co ntinue up to 7 seconds. Once a flame i s established, spark is de-energized an d i ndoor blower m otor (IBM) timing beg in s. 45 seconds later, the RTRM energizes the IBM. If deviation from setpoint is great enough, th ere i s no minim um delay bef ore 2nd stage is energized. When the zone sensor or therm ostat is satisfied, th e gas valve is deener gized, the inducer r uns f or 5 seconds then sto ps (post-pu rge), and the IBM runs for 60 seconds then stops unless being req uested to run cont inuously.

If the burner f ails to igni te, the ignit ion modu le will attempt tw o more ignit ion cycles before l ocking out. The green LED will indicat e a lo ckout by tw o fast flashes. An ignition lo ckout can b e reset by :

1. Opening for 3 seconds and closing the m ain pow er disconnect sw itch.

2. By switching th e ’M ode’ sw itch on the zone sensor to ’ OFF’ and then to the desired positi on , or

3. A llow ing the ign ition control m odule to reset automatically after one hour.

If the burner tri ps due to a high temperat ure limit, the u nit w ill shut down and init iate a four flash diagnosti c. After the lim it cools d ow n and closes, the burner will again restart . There is no lim it to the number of hig h l im it trips th at can occu r.

Figure 54. Direct Spark Ignition Control Sequence of Operation

1st Stag e call f or heat

CBM 20 sec Pre-pu rge

RT-SVD03G-EN 89

Start tri al for ignit ion

2 sec mi nimu m

1st stg on

7 sec tri al for i gniti on

Add ition al 5 sec if n eeded

Start 45 second delay for IDM

2nd st g on

Mi nimu m

Delay

End call for heat

5 sec CBM post -purge

IDM o n

CBM of f

IDM o n for 60 or 90 sec

IDM o ff

Page 90

ReliaTel Hot Surface Ignition Control (12.5 - 50 Ton 1 Stage, 2 Stage, and M odulating Gas Heat)

This microprocessor based, com mu nicating solid state device provides gas valve contr ol, proof of ignition, ignition retries, one h our reset, op eration of the inducer and diagnosti cs through an LED, as well as com munication to the RTRM via a MODBUS com m unication link. Inputs to th e control include high lim it s and flame sensor operation. A com bustion fan pr oving sw itch is used w i th modulating gas heat units but is n ot used with 1 or 2 stag e burners. Th is device takes cont rol of the ignition, tim ings related to the igniti on cycle and supervi sion of the gas component s.

Table 34. Ignition M odule Specificat ions

Volt ag e r an ge 18 -3 2 va c, 50 / 60 Hz

I gn it or volt age 11 5v ac, 5 0/ 60 Hz

Flam e sen se cur re nt 4 .5 mi cro am ps (nom inal) , 1 microam p m inim um

Pre- pur ge 45 se c

Flam e est abli shm ent p er iod 2 se c m in, 7 se c m ax

Flam e failu re r esponse t im e 0. 8 sec or less

Loss of flam e lockout 3 t ri es, lo cks ou t af te r 3r d tr y

Lock out reset I nterr up t po wer for 3 seconds mini mum

Aut o r eset 1 ho ur

Loss of comm unicat ion lock out (with RTRM)

Ignition Control M odule Diagnostics

There is a green LED lo cated on the ignition m od ule. The table below lists the diagnostics and the status of the LED dur ing the vario us operating st ates.

Any tim e the Ignitio n module i s pow ered, the LED w ill be lit to provide statu s of t he ig nition syst em. At initial pow er-up, the LED will flash for on e second.

The pause bet ween groups of flashes is approximately tw o seconds.

Modbus voltage (measure between RTRM J5-3 and J5-4):

• Wi th J5 plug connected, wi ll read approximat ely 9.6 to 10.7 vdc (Flashi ng)

• With J5 unpl ugged, will read approxim ately 10.5 to 11.2 vdc (Flashing).

10 se c

Table 35. Ignition M odule Diagnostics

St ead y OFF No po we r/ I nt ern al failu re

St eady ON No rm al pow er-u p, w it h no he at call.

Slow fla sh rate Nor mal call for he at , ¾ second on, ¼ second of f.

Fast fl ash rate Used for err or i ndicat ion onl y

Er ro r Code F la sh es-

One flash Commu ni cat ion l oss bet ween RTRM a nd I GN

Two fla shes Syst em l ock out; faile d to de te ct or sust ain f lame

Thr ee f lashes Not used

Four f lashes High lim it swi tch open

Five f lash es

90 RT-SVD03G-EN

Flam e se nsed a nd ga s v alv e no t e ner gized; or flam e sen sed and n o call f or h eat

Page 91

ReliaTel Hot Surface Ignition Control (12.5 - 50 Ton 1 Stage, 2 Stage, and Modulating Gas Heat)

1st Stage Call

for Heat

Ignitor

Starts Heating

Combustion

Fan On

60 sec.

Start Trial

for Ignition

1st Stage

Heat On

Start 45 sec

timing for

ID fan

starts

Heater goes

to low fire

Heater goes to 2nd stage

Heating Call

Terminates

Combustion

Fan Off

ID Fan

Continues to

Run for 60 sec.

Indoor

Fan

Shuts Off

If a Call for 2nd Stage, Heater Stays on High Fire

Fires on High Heat

Time will vary depending on call for 2nd stage

45 sec.

7 sec.

45 sec.

1 min.

Sequence of Operations (1 and 2 heat units)

The 12½ through 50 to n packaged units use a drum and tube heat exchanger w ith a negative pr essure g as valv e and h ot su rface i gni tio n. Thi s desig n i s t h e sam e a s w a s u sed w ith th e UCP m icr o controls, but the control circuitry for igni tions has changed to take advantage of ReliaTel MODBUS com mu nications.

When the system switch is set to the "Heat" p osition and the zone tem perature falls below th e heat ing setpoin t, a heat cycle i s initiated w hen the RTRM commu nicat es igniti on i nform atio n to the ignition module (IGN).

The IGN runs a self -check (including ver ification that the gas valve is de-energize). IGN checks the high-limit sw itches (TC01 & TCO2) for n ormally clo sed contacts. Wi th 115 vac supplied to the ig nit ion mo dul e (IGN), th e hot surf ace ign ito r pr obe (IP) is preheated for appr oxi mat ely 45 seconds. The gas valve (GV) is energized for approx im ately 7 seconds for t rial ignition to ignite the bu rner.

Once t he burner is ig nited, the hot su rface i gni tio n pr obe (IP) is d e-energ ized by the igni tio n m odu le and then funct ions as the flame sen sor. The unit initially fires o n high heat, but after approximately 60 seconds, if no additional heati ng is required , the ignition m odule w ill drop back to low heat.

Wh en th e fan sel ectio n sw itch i s set to th e "AU TO" p osit ion , the RTRM energ izes the i ndo or f an rel ay (F) approxim atel y 45 seco nds after initiating the heating cycl e to start the indoor f an m otor (IDM ).

4. Op ening for 3 seconds and clo sing the m ain power disconnect switch,

5. By switching the "Mode" sw itch on the zone sensor to "OFF" and then to the d esired position, or

6. A llow ing the ign ition control m odule to reset automatically after one hour.

When the RTRM is com m unicating w it h the ignition module (IGN), the MODBUS voltage can be measured at the 3J5 plug , pins 3 (negative) and 4 (positi ve). The voltage w ill be fl ashing at approxim ately 10.7 to 9.6 vdc at a rate of once every three seconds. If the 3J5 plug is disconnected, the measured vo ltage at pins 3 and 4 on the RTRM will be approxim ately 10.5 to 11.2 vdc and will be flashing. Flam e current m easur em ents can also be m ade at two pins on th e ignition m odule lab eled "FLAME CHECK" lo cated at the bottom of the modu le. Flame curr ent can be m easured with a DC voltm eter. One volt d c equals one m icr oam p of flame current (1vdc = 1mA).

27.5 - 50 ton "hig h heat" uni ts use tw o drum and tube heat ex changers. Two ignition co ntrols w ork

in tandem to provi de heat as required .

Figure 55. ReliaTel Hot Surface Ignition Control Sequence of Operation

RT-SVD03G-EN 91

Page 92

ReliaTel Hot Surface Ignition Control (12.5 - 50 Ton 1 Stage, 2 Stage, and M odulating Gas Heat)

Modulating heat units ut ilize a variable speed com bustion blower m otor that enables th e motor to operate at the necessary sp eed required to provide the am ount of heat requir ed to satisfy the current heating load of the buil ding. The tabl e below can be used to h elp d eterm ine t he output r pm of the com bustion bl ow er motor.

Table 36. Modulating Heat Voltage Ranges

DC Volts App r ox . RP M

2. 0 950 7 0/ 80

3. 5 16 80 12 6/ 14 2

5. 0 24 10 18 2/ 20 4

6. 5 31 40 23 8/ 26 6

9. 0 38 70 29 4/ 32 8

10 .5 4600 35 0/ 390

Ap pr ox. Ra te ( MBH )

3 5 0 h e ate r/ 3 9 0 h e ate r

92 RT-SVD03G-EN

Page 93

Heat Pump Demand Defrost

There are two schem es in com m on usage for heat pump outd oor coil defr osting: demand defrost and time-tem per ature defrost. Deman d Def rost is more efficient because defrost cy cles ar e initiated only when necessary, compared with init iat io n based on operating time b elo w the threshold temperature. All 3-10 ton convertib le packaged h eat p um ps use Dem and Defrost.

Outdoor coil defrosti ng occurs o nly w hen operating i n h eati ng mode with ou tdoor am bient tem perature belo w 52°F and the outdoor coil tem perature below 33°F. The first defrost cycl e after power-up is initiated based on operating time at th e req uired conditio ns. Short ly after com pletion of the defrost cycle, the tem perature difference between the outdoor coil and outdoor air is calculated and is used as an ind icator of u nit perform ance at dry coil conditions.

Over time, as moist ur e and frost accum ulate on t he coil, the coil tem perature will drop, increasing the tem perature d ifference. Wh en the temperature di fference reaches 1.8 tim es the dr y coil tem perature differential (delta T), a defrost cycle is initiated. Wh ile defrosting, the rever sing valve is in the cooling posi tion, out door fans ar e off, and the compressors contin ue to operat e.

The defrost cy cle is terminat ed w hen the coi l temperature rises hi gh enough to indicate that the frost has been eli minated. Termination of the def rost cycle inclu des a “ so ft start” delay. At the end of each defrost cycle, th e outdoor fan com es on 5 seconds before the reversing valve i s deenergized. This reduces stress on the compressor and makes for a quieter defr ost .

There are three condit ions that mu st be met for Dem and Defrost to operate:

• Heating m od e with compressor(s) operating.

• Outdo or ambient < 52°F.

• Outdo or coil < 33°F on any ci rcuit.

Figure 56. Typical Demand Defrost Cycle

Defrost Service Test

Wh en a Service Test Def rost Request is recei ved, d efrost m ode i s initiated i mm ediately. The def rost cycle will remain act ive for a m inimum of 1 m in ute, after w hich the norm al t erm ination will occur when the coil tem perature exceed s the defrost ter mination tem perature as defined below . The Service Test Defrost Request will remain act ive fo r a m axim um of 10 m in utes, after w hich the unit will transition out of the defrost step as described below.

Defrost Mode Operation

Defrost Mode shall rem ain active until th e Outdoor Coil Temperatu re (OCT) exceeds the Defrost Term ination Tem perature (DTT) or u ntil ten (10) m in utes have passed, whichever occurs fir st. If all Compressor Outputs tu rn Off durin g the defrost cycle, such as duri ng a High Pressure Cutout, Defrost Mode wi ll terminat e.

When Defrost M ode has terminat ed, the function w ill tr ack twelve (12) minu tes to assure that a dry coi l con dition has b een achieved. A t th e tw elve-mi nut e poi nt, DT w ill be calculated using the current values of OAT and OCT (OAT is exp ected to be higher than OCT). Thi s value is mu ltiplied by 1.8 to

RT-SVD03G-EN 93

Page 94

Heat Pump Demand Defrost

calculate the new Initiate Value. Figure 56 presents a grap hical representation of a t ypical dem and defrost cycle.

Sequence of Operation

Demand defr ost is standard f eature w hich perm its defrost whenever coil icin g conditions begin to significantly r educe unit capacity. To perm it defro st, the outdoor temperature m ust be below 52F, coil temperatur e m ust be below 33F, and the delta temperatur e F mu st exceed a RTRM calcu lated value. After 30 minutes of run time under defr ost permit cond itions, the RTRM initiates a def rost cycle. Upon termination o f this cycle, the RTRM monitors the out door tem peratu re (ODT) and the coil temperatur e (CT) and cal culates the delta tem perature F (ODT-CT). This value is stored in m emo ry an d th e RTRM calcul ates a def rost ini tiat e value. The RTRM co nti nual ly co mp ares th e delt a tem per atur e F to th e defr ost ini tiat e val ue. Once t he del ta T reaches the i nit iate v alue, a d efro st cycl e is initiated.

During the defro st cycle, the RTRM energizes the relay (K3), wh ich energizes the switch over valve (SOV) thr ough the nor mally open K3 relay con tact. Thi s will then turn the outdoor fan m otor(s) (ODM) ’Off ’ by de-ener gizing the (K8) and (K7) relays, which d e-energizes the (ODF) relays. The RTRM energizes the auxiliar y electric heat contacto r (AH), and (BH) (if applicable), if t hey are not operating, while m aintaining com pressor (CPR1) operation. The defro st cycle is terminated b ased on the RTRM term ination temp erature calculat ion usin g the out door temperat ure (ODT) +47°F. The defrost term ination temperature (DTT) w il l be limited between 57°F and 72°F.

Emergency Heat Operation

When the system selection sw itch is in the ’EM HEAT’ M ode, and the zone tem perature falls below the heating setpoint con tr olband, the RTRM by passes com pr essor and outdoor fan operatio n an d ener gizes the K1 relay located o n the RTRM . When K1 relay contacts cl ose, the first stage auxiliary elect ric heat contactor (AH) is en ergi zed. If the first stage of auxiliary electr ic heat cannot satisf y the heating requi rem ent, the RTRM energizes the K2 relay located on the RTRM .

Diagnostic Information

Demand Defrost also tracks failures and operatin g p roblems as follow s:

When the K2 rel ay contacts close, the second stage aux iliary electric heat contactor (BH) is energized. The RTRM cycles both the first and second stages of heat ’On’ and ’Off ’ as r equired to maintain the zon e tem perature setpoint.

Correct defrost operation relies on accurat e tem perature inf or mation from the outside air senso r (OAS) and the coil tem perature sensor s (CTS).

If ei ther of t hese sensors f ail, the un it w ill revert to t he def ault mode any t ime the uni t is i n the acti ve heat mode with com pressors r un ning.

Wh en any Defro st Fault i s acti ve, or if any senso r has f ailed , a 5-mi nut e defr ost cy cle w ill be ini tiated after each 30 m inut es of cum ulative com pressor heating operatio n.

94 RT-SVD03G-EN

Page 95

Heat Pump Demand Defrost

Table 37. Dem and Defrost Fault Designation

Coil t em perat ure Sen sor Fail ur e Sensor is sho rt ed o r open Act iv at e D efr ost Fault Out door Tem perat ure Sen sor Fail ur e Sensor is sho rt ed o r ope n Act iv at e D efr ost Fault DT is bel ow Minim um Val ue 12 mi nu te s aft er defr ost i s term ina te d

Def rost Term inated o n ti m e r eq uir eme nt Time Term inati on

i s abov e Max imum Valu e 1 2 m inu tes aft er defr ost is

term inated

d oes no t cha nge b y 2 deg re es i n an ho ur ’s ti me

st art ing 12 mi nut es a fte r d efrost is ter minat ed and DT is less t han or equal t o 4 deg rees 1 2 m inu tes aft er def rost is term inated

Def ro st Ter minat ion Tem pera tu re ( DTT) = Ou tdoor Air Tem per at ur e ( OAT) + 47 ºF 57 º F < = DDT < = 72 º F DT = Out door Air Tem per at ur e ( OAT) – Out door Coil Tem per atur e ( OCT) Def rost I nit iat e Te mp er atur e= 1.8 * ( DT) 12 Min ut es Af te r Def rost Mode is t ermi nat ed)

Sy m pto m Di agn ostic Re sp on se

Low D

Hig h D

Unch an gin g D

I f> 2 h ou rs, a ctiva te De fr ost Fault Reset tim er if D re tu rn s wit hin boun ds. I f def ro st is t ermi nated o n ti m e r eq uir eme nt ( vs. different ial t em pera tu re ) After 10 co nsecut iv e Ti me Term in at ion s, act ivat e De fr ost Fau lt . I niti at e D efr ost Aft er 16 co nsecut iv e High D Def ro st Faul t.

I niti at e D efr ost an d act ivate Defr ost Activat e Defr ost Fau lt

Independent Circuit Defrost Operation

For Odyssey and EM EIA Ind epen dent Circuit Heat Pum p units with tw o outdoor coil temperature sensors, the uni t w ill perform def ro st per circuit based on i ts own coil tem per ature sensor value, the outdoor am bient tem perature, and the accumulated circuit run time. At least one st age of auxiliary heat w ill be energized anytim e either cir cuit is in defrost m od e. All other defrost functionality, includin g the diagnostic conditio ns, w ill per form as described above in dep endently per circuit.

I niti at ion s a ctivate

RT-SVD03G-EN 95

Page 96

ReliaTel Economizer Module Layout (Honeywell)

Min Pos.

Setpoint

0-50%

Power Exhaust

Contacts

MIxed Air Sensor Input

Common

OHS Input

Not used - OAT is

Connected to RTRM

RA Input

Common

RHS Input

CO2 Sensor Input

Common

1 2

EXF

1 2

MAT

1 2

OAH/

OAE

Green LED

ABCDE

Settings

1 2

OAT

RAT

RAH/

RAE

DCV

2-10 VDC

Feedback

Input

2-10 VDC

Control

Output

ModBus

Common

24VAC

1 2

3 4

DCV Setpoint

0-100%

OFF: No Power or Failure ON: Normal, OK to Economize Slow Flash: Normal, Not OK to Economizer Fast Flash: Communications Failure Pulse Flash: Error Code: 1 Flash: Actuator Fault 2 Flashes: CO2 Sensor 3 Flashes: RA Humidity Sensor 4 Flashes: RA Temp Sensor 6 Flashes: OA Humidity Sensor 7 Flashes: OA Temp Sensor 8 Flashes: MA Temp Sensor 9-11 Flashes: Internal Fault-Replace ECA

Shorted - Force Closed Open = On Board Pot. 270 = 50%

Ω

Remote Minimum Potentiometer

WHT

RED

BLUE

W7340A1012 Honeywell Actuator = W7399A1004

The economi zer mo dule plug s directly o nto the actuator. It has a diagnostic LED, w hich under norm al operation is eit her ON (OK to econom ize) or FLASHING (Not OK to econ om ize). It com m unicates vi a MODBUS w ith the RTRM , and recei ves out side air tem peratu re input from the RTRM. Mi xed ai r senso r (MAS), ret urn air sensor (RAT), outdoor hum idity sensor (OHS), and ret urn humidity sensor (RHS) are all plugged directly into the ECA. The app lication section of th is manual shows how t o apply a CO2 sensor.

A new stripped d ow n version of th e ECA M odule was im plem ented in April, 2005 which onl y contains th e MAT, input, min. pos. adjustm ent and the wi re plug for pow er and M odBus com m unications. This module wi ll only be applied on units that are supplied from the factory without any econom izer options su ch as, Reference Ent halpy, Com parati ve Enthalpy or C0 Options installed in the fiel d w ill require the "full -up" version in order to operate pr operly.

• To read the actual damp er position, read t he DC voltage at the ’2-10 vdc feedback input’ terminals. 2 vd c is closed, 10 vdc is 100% open.

• To drive 2 actuators w it h 1 control, con nect field wiri ng as shown in

Not e: Remote m inimum position input does not w ork w hen a CCP is contr olling the u nit.

Figure 57. ReliaTel Economizer Module Layout (Honeywell)

Figure 59, p. 98.

96 RT-SVD03G-EN

Page 97

ReliaTel Economizer Layout (RTEM)

COMMU NICATIONS FAILURE

MAT SENSOR FAULT

OAT SENSOR FAULT

OAH SENSOR FAULT

RAT SENSOR FAULT

RAH SENSOR FAULT

CO2 SENSOR FAULT

ACTUATOR FAULT

NORMAL - N OT OK TO ECONOMIZE

NORMAL - OK TO ECONOMIZE

NO POWER

BLINK

STEADY FLASH

STEADY ON

OFF

LED FLASH CODES

VAC

XFMR

MBU S

2-10

VDC DAMPER OVERRIDE

2-10

VDC DAMPER POSITION

2000

1500

1000

500

1900

300

Pre-RTRM V.

DCV SETPOINT

RTRM V.8 or N ewer

ENTHALPY SETPOINT

DESIGN

DCV

MIN POS

DCV MODE

P1P

DCV

RAH

RAT

OAT

OAH

MAT

ExF

Green LED

. . .

. .

Remote Minimum Potentiometer

WHT

RED

BLUE

. .

1 2

Power Exhaust

Contacts

Mixed Air Sensor Input

Common

OHS Input

Not used - OAT is connected to RTRM

Common

RA Input

Common

RHS Input

Common

CO2 Sensor Input

Shorted - Force closed Open = On Board Pot. 270Ω = 50%

The RTEM Module plugs direct ly onto the actuator. It has a diagnostic LED, which under norm al operation is either ON (OK to economi ze) or FLASHING (not OK to economi ze). It communicates via MODBUS w ith the RTRM, and receives an outside ai r tem perat ure input f rom the RTRM . Mixed air sensor (M AS), return air sensor (RAT), ou tdoor hum id ity sensor (OHS), and r eturn humi dity sensor (RHS) are all pl ugged directly into the RTEM. The application section of this m anual show s how to appl y a CO2 sensor.

A stripped down version of the RTEM, which only contai ns the M AT input, Design m in. pos. adjustment, Remote M in Position input, Enthalpy Setpoint, and the w ire plug for pow er and ModBus com m unications, is also available. This module w il l only be ap plied on u nits that are supplied from the factory w ithout any economizer options such as, Reference Enthalpy, Com parat ive Ent halp y or C02. Opt ion s inst alled in t he field w il l req uir e the "ful l-up " ver sion in o rder to operate properly.

• To read the actual dam per positio n, read the DC vo ltage at the ’2-10 vdc Dam per Posi tion’ in put terminals; 2 vd c is closed, 10 vdc is 100% open.

• To drive 2 actuators w it h 1 control, con nect field wiri ng as shown in

Not e: Remote m inimum position input does not w ork w hen a CCP is contr olling the u nit.

Figure 58. Reliatel Economizer M odule Layout (RTEM)

Figure 59, p. 98.

RT-SVD03G-EN 97

Page 98

ReliaTel Economizer Actuator Layout

Remove the screw in the center of the actuator mo dule. Remove the actuator m odu le (this will not be used). Then, rem ove the wiring from the m od ule.

Term inals that are exposed by rem oval of the act uat or module are ¼" sp ades labeled 24 VAC, TR & TR1 and 2-10 VDC IN (+/-)

Apply 24 VAC to TR and TR1 and 2-10 VDC sign al to (+/-) on 2-10 VDC IN.

DO NOT USE the low er term inals labeled 2-10 VDC OUT.

Figure 59. ReliaTel Economizer Terminals

98 RT-SVD03G-EN

Page 99

ReliaTel Economizer Operation

Customer Benefit

An econom izer co nsists of a fresh air dam per, a return air dam per, linkage to maintain an inv erse relationship bet ween the two, and an actuator to control the damper position. An economi zer is used to provide two un it function s: ventilation and econ om izer cooling. In either case, the inverse relationship bet ween the return and outdoo r air dampers allo ws the uni t to m ain tain the sam e approxim ate total airflow r egardless of economizer position. A linkage adjustm ent is typically required in the f ield to adjust fo r differen ces in pressure drops due to different duct designs.

Economizer cooling is provided to take ad vantage of cooler o utdoor air to sat isfy a cooling load in a conditioned space m inimizing the need for m echani cal cooling (w it h co mpressors). While econom izer cooling, it is necessary to lim it the dam per position so th at the m ixed air tem perature does not fall below 53°F (± 3°F) and cau se excessiv ely cool air f rom bein g discharged fr om the uni t. When used w ith a zone sensor, an economizer setpoint that is below the cooling setpoint is used to allow sub-cooling essential ly for free, further reducing the need for more ex pensiv e mechani cal cooling. To max im ize th e use of an econo mizer, mechanical cooling is delayed from running until it has been determi ned that the econom izer alone cannot satisfy the load.

Any tim e th e sup ply fan is On and the building (unit ) is o ccupied, the econom izer dam per will be m aint ained at or abov e mi nim um po sition. Th e econo mi zer dam per i s held closed wh en th e supply fan is off t o prevent wat er from gett in g into the econom izer section of the unit.

Compressors will be delay ed from operati ng until the econom izer has opened to 100% for 5 minutes on all unit ty pes other than Voyager III which w ill h ave a 3-m inute delay.

VAV Economizer Cooling Operation

A similar m eth od of determ ining and adjusting the econom izer setpoint as descri bed in CV op eration will be used in VAV Cooling operation w ith the additional VAV requi rem ents below .

• Economizer Setpoint = SA Temp Control Point - 2°F.

• Econo mizer Cooling is only all owed w hen eco nom izing is en abled and SA tem p is greater than Econo mizer Setp oi nt - 1.5°F.

• If co nditio ns all ow enablin g of econom izer cool ing after a com presso r is act ive, t he econ omizer dam per is forced t o 100% open unt il all com pressor s are deactivated or conditions chan ge to disable econom izing.

• If economizer cooling is acti ve prior to m echanical cooi ng, com pressor operation w ill be inhibited until the economi zer dam per reaches 100%. Once the econo mizer reaches 100%, mechanical cooling will be enabled without d elay.

• During VAV Unoccupied oper ation economizer coo ling will operate as it d oes in CV Unoccupied.

RT-SVD03G-EN 99

Page 100

ReliaTel Economizer Operation

Economizer Operation w ith Zone Sensor, Programmable Zone Sensor or ICS

When economizing is enabled and the uni t is operati ng in the co oling m ode with a zone sensor, the econom izer damper is m odulated between its minim um posi ti on and 100% to maintain the zone temperature at the economizer setpoint.

Wh en the uni t is applied w ith a zone sensor, prog rammable sen sor or ICS, the econo mizer set point (ESP) i s derived from t he Cooling an d Heating setpoints (CSP and HSP) so that ESP is the higher of 1) CSP – 1.5°F or 2) HSP + 1.5°F.

When enabled, th e econom izer will m od ulate betw een mi nimum position and 100% to mai ntain the mixed air tem perature to the cal culated mixed air setp oint (53°F minimum ). If the mixed air tem perature starts to fall below the m ixed air setpoint, t he economizer start s closing. If t he m ixed air tem perature falls to 50°F or below, t he damper will close to the minim um posi ti on.

If the economizer is not able to satisfy th e coo ling setpoint, 1 Should the cooling setp oi nt not be satisfied with 1st stage cooling, 2nd stage cooling will be ener gized. Most often, t he economizer and 1st stage cooling wi ll be adequate to satisfy the load . 1st stage cooling w ill not start until the econom izer has been ful l open for fi ve m inutes on a non-V3 (3 minutes if the u nit is a V3) and the zon e tem perature error h as not been reduced quickly enough.

stage coolin g w ill be energized.

Economizer Operation w ith Conventional Thermostat (CV only)

When the unit is oper ati ng from a conventional therm ostat or oth er binary input, the econ om izer setpoint feature, relative to the cooling and heating setp oints, is lo st.

The economi zer contro l is based strictly on a signal fr om the t hermostat, bu t still m aintains m ix ed air tem perature cont rol of 53°±3°F when in the economizer m ode. The economi zer enable and disable fun ction is sti ll determ ined by the ou tside air senso r through the RTRM.

If a single-stage therm ostat is used, only the econo mizer (if enabled ) or the com pressor (if econom izer is disabled) w ill operate on a call for co oling. A t wo-stage therm ostat is required to achiev e econom izer o per ation and compressor operati on at the sam e ti me.

With econom izer enabled, a Y1 call for 1 modulate bet ween m in im um posi tion and 100% to m aintai n m ixed air tem perature at 53°±3°. At 50°F the damper will be at m inim um positi on. If the econom izer is enabled, a Y2 call for 2nd stage cooling will start t he first com pressor only if the econom izer damper is at 100% open contin uously for 5 m inutes on a non -V3 (3 minutes if t he unit is a V3).

If the economizer is disab led, 1st stage (Y1) w ill be the first com pressor. If th e unit has two com pressors, a call for 2

When using a conventional therm ost at, or other binary input, the ReliaTel controls w ill only al low tw o stages of cool ing.

Barometric Relief

Units with econom izers bring i n outsid e air for ventil ation and/or economizer coo ling. Because the econom izer contains a return air dam per that oper ates inversely to the outdoor ai r damper, the outdoor air w ill tend to p ressurize the conditioned space. Th is can cause exterior do or s to open or audible noise from air escaping th rough various buildi ng openings.

Units with out exhaust fans rel y on barometri c dam pers to vent the pressure that b uilds up in the space due to outd oor airflow.

stage coolin g w ill be the econom izer. The damper w ill

stage coolin g (Y2) w ill st art the seco nd com pressor.

100 RT-SVD03G-EN