Auto-zone-control-systems Auto-Zone Plus Systems Installation & Operatio Manual de usuario Pagina 168
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Section 4 Auto-Zone Plus
4-18 Start-Up and Troubleshooting
1.3.9 Checking the Local Loop at a Controller
Diagram
Meter Set To Read DC Volts
COMM
LOOP
T
SHLD
R
-
T
R
SHLD
-
+2.9 VDC
to
+3.1 VDC
COMM
LOOP
T
SHLD
R
-
T
R
SHLD
-
+1.9 VDC
to
+2.1 VDC
T to
S
HLD
CV, CV-C
or Zone Controller
CV, CV-C
or Zone Controller
R to SHLD
The indicated readings are typical of a normal operating system. Actual readings may vary
slightly due to the number of units installed and other factors. Any significant deviation
from these values generally indicates a problem.
These tests assume that the controller being checked is connected and powered up.
Overvie
w
Proper loop voltages are essential for reliable communications. It is normal to see
fluctuations on an operating communications loop. The average value should be close to the
acceptable range described below. Values will vary upon initial powerup for about 30-45
seconds. The voltages may fluctuate as normal communications occur.
Measurements
T - SHLD 2.9 – 3.1 Volts DC
R - SHLD 1.9 – 2.1 Volts DC
Action
Readings near zero volts Check for shorted wiring.
If voltages are too high or too low on either
side
One or more devices connected to this loop
have damaged Comm Driver chips.
- Plus System 1
- Auto-Zone Plus 2
- Section 1 3
- Conventions 5
- General Information 7
- Zone Manager 10
- Bypass Damper or VFD Control 11
- Constant Volume Controller 12
- Zone Sensor 13
- Expansion Boards 13
- Design Considerations 14
- Low Supply Air Temperatures 15
- Override Conditions 17
- Building Pressurization 18
- Design Guide 19
- Selection 23
- Step #6 - VFD Considerations 24
- Round Zone Damper Selection 26
- Rectangular Zone Dampers 28
- Auxiliary Heat Control 29
- Options 29
- Relay #1 - Parallel Fan 30
- Relay #2 - Box Heat 30
- Relay #3 - Aux Heat 30
- Relay #4 - Series Fan 30
- Table of Contents 33
- Table of Figures 34
- Section 2 Auto-Zone Plus 36
- 2-4 Design Guide 36
- Installation Tips 37
- 2-6 Design Guide 38
- Bypass Damper 39
- Zone Manager Components 41
- Zone Manager Wiring 42
- Zone Manager Addressing 43
- Expansion Board Wiring 44
- Communications Loops 46
- To Comp uter 47
- Bypass Dampers 48
- Bypass Damper Wiring 50
- Zone Dampers 51
- Zone Controllers 52
- Zone Controller Components 53
- ACTUATOR 56
- EXPANSION 56
- Auxiliary Relay Board for 57
- 2-26 Design Guide 58
- CV Controller 60
- CV Controller Wiring 62
- CV-C Controller 65
- CV-C Controller Wiring 66
- CV-C Expansion Board Wiring 67
- CV-C Controller Addressing 69
- Sensors 70
- 4.0" 72
- 3/4" 72
- Incorrect 73
- See Note #1 73
- Duct Static Pressure Sensor 74
- CommLink IV 76
- Optional Remote Link II 77
- CommLink IV Wiring 78
- Comm Loop 79
- Comm Loo 79
- Installing the CommLink IV 80
- System Manager 81
- System Manager Wiring 82
- 2-54 Design Guide 86
- Section 3 Auto-Zone Plus 88
- 3-2 Programming 88
- System Manager Layout 90
- View/Change Zone 91
- Zone Controller Status 91
- Constant Volume Unit 91
- View Alarms Screen 92
- Full System Access 93
- Set Time & Date 94
- New Passcodes 95
- Rebuild Alarm Map 96
- Read / Reset Units 97
- Zone Manager Status 99
- Status Screen #3 100
- Status Screen #4 100
- Status Screen #5 100
- Status Screen #6 101
- Status Screen #7 101
- Status Screen #8 101
- Configuration 102
- Configuration Screen #16 106
- Configuration Screen #17 106
- Configuration Screen #18 106
- Zone Manager Setpoints 107
- Setpoint Screen #5 109
- Setpoint Screen #6 109
- Setpoint Screen #7 109
- Setpoint Screen #8 110
- Setpoint Screen #9 110
- Setpoint Screen #12 112
- Setpoint Screen #13 112
- Setpoint Screen #14 112
- Setpoint Screen #15 113
- Setpoint Screen #16 113
- Zone Manager & CV AHU 114
- Force Modes 114
- Min/Max Force Modes 115
- Open/Close Force Modes 115
- Zone Controller 116
- Read/Reset Operations 116
- Individual Zone Status 116
- Screens 116
- Status Screen #1 117
- Status Screen #2 117
- Zone Controller Setpoints 119
- Setpoint Screen #3 120
- Setpoint Screen #4 120
- Zone Controller Force 123
- CVAHU Read/Reset 124
- Operations 124
- CVAHU Status 125
- CVAHU Setpoints 128
- Setpoint Screen #10 132
- Setpoint Screen #11 132
- Scheduling, Holidays and 135
- Optimal Start 135
- Holidays 136
- CV AHU Scheduling and 138
- Wetbulb Module 140
- Wetbulb Setpoints 141
- LCD/Keypad Operations 142
- Summary 142
- Section 4 151
- 1.0 Communications 153
- Overview 153
- 1.2 Auto-Zone - Plus System 154
- (Optional) 155
- The Loop Does Not 156
- Have To Follow The Board 156
- Address Sequence 156
- USB Cable 156
- To Computer 156
- Auto-Zone Plus Section 4 157
- Communications Interface 159
- 1.3 Troubleshooting 160
- 485 LOOP 162
- T - to - G 163
- R - to - G 163
- Are Under The Chip 170
- 2.0 Zone Manager 173
- 2.1.3 Purge Mode 174
- 2.1.4 Return Air Control 174
- 2.1.5 Operating Summary 174
- Manager 175
- 2.2.3 HVAC Unit Connector 176
- 2.2.5 Powered Exhaust 177
- Section 4 Auto-Zone Plus 180
- 133 IN-LB 181
- 2.3 Troubleshooting 182
- 2.3.1 (continued) 183
- 2.3.2 (continued) 185
- 3.0 Zone Controller 188
- 3.1.3 Operating Summary 189
- Controller 190
- 3.2.2 Room Sensor Connector 191
- 3.2.3 Auxiliary Inputs 191
- 3.2.7 Damper Actuator Jack 192
- 3.3 Helpful Tips 194
- 4.0 CV Controller 195
- 4.2.7 CV Controller Wiring 200
- 5.0 Start-Up 201
- 5.2 General Troubleshooting 202
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