Trane Symbio 700 - Experimental Relay Logic Defrost Heat Circuit

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156

Experimental Relay Logic Defrost Heat Circuit

Theory of Operation

If the Symbio (UC) is calling for a compressor to run, and not calling for a condenser fan to run,

the unit is in Defrost Mode so turn on a stage of heat.

Main Page

Table of Contents6
Control Box Layouts14
Single Fan Condenser14
Dual Fan Condenser14
Air Handler15
Symbio™ 700 Unit Controller (UC)16
Symbio™ 700 Unit Controller (UC) Troubleshooting Info17
Symbio™ 700 Unit Controller LEDS18
LED Description Notes18
Symbio™ 700 Unit LED Functions19
Symbio 700 Factory Connections20
Symbio 700 Field Connections23
Odyssey Adapter Board24
Troubleshooting the Compressor Circuit(S)28
Circuit 128
Circuit 229
Compressor Control Circuit Troubleshooting Tips - Derived from Bench Testing30
Compressor Protection - (HPC, DTL or aux Switch Proving Trip)31
Compressor "X" Proving Trip & Lockout31
Two Cases Can Cause a "Circuit X Proving Lockout" Event31
Compressor X Contactor Failure (Manual Reset)31
Compressor Protection - Low Pressure Cutout Control32
Prior to Compressor Startup32
After Compressor Startup32
Circuit X LPC Trip (Auto-Reset)32
For Cooling Only Units or Heat Pumps in Active Cooling32
For Heat Pump Units in Active Mechanical Heating and Outdoor Air Temperature ≥ 0°F33
Circuit "X" Low Pressure Lockout (Manual Reset)33
Odyssey Relay Board34
Odyssey Options Board - BAYMODU00137
Indoor Options Module Factory Connections38
J11 Options Module Addressing - Future39
Indoor Options Module Communication Troubleshooting41
Adding Electric Heat to a Symbio Air Handler Paired with a Symbio Condenser43
Electric Heat Adapter Harnesses44
Electric Heat Wiring Diagrams45
Phase Monitor46
Phase Monitor Wire Connections47
Emergency Stop48
Supply Air Tempering49
Heat Pump Heating Lockout50
When the Outdoor Air Temperature Active ≤ Heat Pump Heating Lockout Setpoint - Active50
When the Outdoor Air Temperature Active > Heat Pump Heating Lockout Setpoint - Active + 5F50
Symbio 700 Demand Defrost Operation - Derived from Bench Testing51
First Defrost Permit Conditions after Power up51
Subsequent Defrosts Permit Conditions51
Sequence of Operation51
Defrost Termination51
Defrost Cycle Example52
Independent Circuit Defrost Operation52
Default Mode52
Condenser Defrost (Heat Pumps Only)53
Demand Defrost Control53
Temperature Sensors (NTC)55
Zone Sensor Mode58
Zone Sensor Setpoint58
Zone Sensor Info59
BAYSENS800 Wiring59
BAYSENS135 / X13790886 / Wiring60
Zone Sensor Averaging61
Remote Sensor Wiring62
Additional Thermostat / Zone Sensor Info63
Condenser Fan Rotation for Dual Fan Units64
Condenser Fan Staging65
Dual Condenser Fan - Shared Airstream Manifolded (Cooling Only)65
Dual Condenser Fan - Independent Airstream Dual (Cooling Only and Heat Pump)65
Compressor Staging66
Cooling Only (Electric Heat) - CVZT & VVZT66
Dual Compressor Cooling Staging (Manifold or Independent)66
Dual Unloading Compressor Cooling Staging (10 and 20 Ton)66
Heat Pump - CVZT & VVZT66
Constant Volume/Multi-Speed Fan Space Temperature Control (CVZT)67
Space Temperature Recovery67
Supply Fan Control67
Constant Volume/Multi-Speed Fan Space Temperature Control (CVZT) Chart68
Variable Volume Fan Space Temperature Control (SZVAV/VVZT)69
Supply Fan Control69
Variable Volume Fan Space Temperature Control (SZVAV/VVZT) Chart70
VVZT DAT Control Mode71
Supply Fan Speed Control72
Single-Speed, Belt-Driven Fans72
2-Speed & Variable Speed VFD-Driven Fans72
Supply Fan Status Points72
Single-Speed72
VFD-Driven72
Fan Setpoints with VFD-Driven Fan Types72
Supply Fan Maximum Speed Setpoint72
Supply Fan Minimum Speed Setpoint73
Supply Fan Percentages73
Multi-Speed Minimum Supply Fan Speeds73
Variable Speed Minimum Supply Fan Speeds73
Airflow Adjustments74
Constant Volume Units74
Stage Airflow/Single Zone VAV (Symbio Cond Only)74
Stage Airflow (Electromechanical Cond Only)74
Symbio TR-150 VFD Parameters75
VFD Parameter Info77
VFD Harness Part Numbers77
VFD Faults Requiring Manual Reset77
Diagnostic: Supply Fan Failure77
Supply Fan VFD Communication Status77
TR150 VFD Communication Troubleshooting78
Evaporator Defrost Control80
If Configured for Evaporator Defrost Control = Enabled80
If Configured for Frostat = Installed80
SYMBIO 700 Phone APP81
Download the App82
Symbio Service & Installation (Mobile App) Overview83
Bluetooth Connection & Pairing83
Login85
Unit List86
Home88
Settings91
Manage Settings91
View Configuration Sub-Menu94
Status101
Alarms106
Tools107
Service Test Mode108
Service110
IMC Link Reset112
Backup115
Restore116
Update Firmware118
Restart Controller120
Notes121
Notes122
Symbio 700 UC Onboard User Interface Menu Structure123
Symbio 700 UC Onboard User Interface Menu Items124
Home125
Status126
Active Setpoints126
System127
Indoor129
Refrigeration130
Heat131
Settings132
System132
Indoor133
Refrigeration133
Heat134
Service135
Diagnostics135
Test135
Statistics Reset135
Options Modules136
Modbus136
Utilities137
About137
Active Configuration137
Edit Configuration138
Display139
Date and Time139
Lon139
Initiating Test Mode on an Odyssey Symbio Using the Onboard User Interface140
To Initiate Test Mode140
To Exit Test Mode140
Interconnecting Wiring between Condensers and Air Handlers141
Interconnecting Wire Info141
Pairing a & B: Symbio Condenser or Heat Pump with Constant Volume Air Handler or SZVAV / 2 Speed Air Handler142
Pairing C: Legacy Electromechanical Condenser with Symbio 2-Speed Air Handler142
Symbio Condenser (Cooling or Heat Pump) with Legacy CV Air Handler144
Symbio Condenser (Cooling Only) with Legacy 2 Speed Electromechanical Air Handler145
Legacy Electromechanical Condenser with Symbio CV Air Handler146
Legacy Reliatel Condenser (Cooling or Heat Pump) with Symbio CV Air Handler147
Pairings Not in the IOM148
Reliatel Condenser Paired with a Symbio SZVAV Air Handler149
Symbio Condenser (Cooling Only) with Reliatel SZVAV Air Handler (TR-150 Only)151
Symbio Condenser (Cooling Only) with Reliatel SZVAV Air Handler (TR-150 and TR-200)153
Experimental Relay Logic Defrost Heat Circuit156
Odyssey Air Handler R22 and R410A TXV Valve Conversion Guide157
Odyssey Refrigeration Miscellaneous Info158
Microchannel Heat Exchanger Condensers (MCHE)158
Solenoid Valves158
Moisture-Indicating Sight Glass158
Hot Gas Bypass159
Line Sizing159
Oil-Traps159
Leak Checking159
System Evacuation159
Unit Charging160
TTA Charging and Pressure Charts161
TTA0724*A* with TWE0904*A162
TTA0724*D* with TWE0724*B163
TTA0724*D* TWE0724*B* Pressure Curve164
TTA0904*A* with TWE0904*A165
TTA0904*A* with TWE1204*A166
TTA0904*D* with TWE0904*D167
TTA0904*D* with TWE0904*D* Pressure Curve168
TTA1204*C* with TWE1204*A169
TTA1204*D with TTA1204*C170
TTA1204*D with TTA1204*C Pressure Curve171
TTA1204*D with TTA1204*C172
TTA1204*D with TTA1204*C Pressure Curve173
TTA1804*D* with TWE2404*B174
TTA1804*D* with TWE2404*B* Pressure Curve175
TTA1804*C* with TWE1804*B176
TTA2404*D* with TWE2404*B177
TTA2404*D* with TWE2404*B* Pressure Curve178
TTA2404*C* with TWE2404*B179
TTA3004*C* with TWE3004*B180
TTA0902*A* with TWE0902*A181
TTA1202*A* with TWE1202*A182
TTA1802*D* with TWE180B183
TTA2402*D* with TWE240B184
TTA1802*D with TWE180B185
TTA2402*D with TWE240B186
TWA Charging and Pressure Charts187
TWA0724*A with TWE0904*A188
TWA0724*A with TWE0904*A Pressure Curve189
TWA0724*D with TWE0904*B190
TWA0724*D with TWE0904*B Pressure Curve191
TWA0904*A with TWE0904*A192
TWA0904*A with TWE0904*A Pressure Curve193
TWA0904*D with TWE0904*D194
TWA0904*D with TWE0904*D Pressure Curve195
TWA1204*A with TWE1204*A197
TWA1204*A with TWE1204*A Pressure Curve198
TWA1204*D with TWE1204*D199
TWA1204*D with TWE1204*D Pressure Curve200
TWA1804*D with TWA1804*B202
TWA1804*D with TWA1804*B Pressure Curve203
TWA2404*D with TWA2404*B205
TWA2404*D with TWA2404*B Pressure Curve206
TWA0902*A with TWE0902*A208
TWA1202*A with TWE1202*A209

Trane Symbio 700 - Experimental Relay Logic Defrost Heat Circuit

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