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Tracer AH540
Trane Tracer AH540 User Manual
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Chapt
er 7
T
roubleshooting
10
0
CNT
-S
VX05B-EN
109
111
Table of Contents
Default Chapter
7
Table of Contents
7
Chapter 1 Overview and Specifications
11
Configuration Options
11
Communication with Other Controllers
13
Controller Circuit Boards
14
Chapter 1 Overview and Specifications
16
Specifications
17
Chapter 2 Operator Display
19
Installing the Stand-Alone Operator Display
19
Connecting the Portable Operator Display
21
Setting up the Operator Display
22
Setting up Time and Date
22
Calibrating the Operator Display
23
Adjusting Brightness and Contrast
23
Setting Up, Changing, or Disabling the Security Password
24
Chapter 3 Input and Outputs
25
Binary Outputs
25
Analog Outputs
26
Analog Inputs
27
IN1: Space Temperature
28
IN2: Local Setpoint
28
IN3: Fan Mode Switch
29
IN4: Discharge Air Temperature
29
IN5: Outdoor Air Temperature
29
IN6: Mixed-Air Temperature
30
IN13: Universal Analog Input
30
J43: Duct Static Pressure
32
On/Cancel Buttons on the Zone Sensor
33
Binary Inputs
33
IN7: Low-Temperature Detection or Coil Defrost
34
IN8: Run/Stop
35
IN9: Occupancy or Generic
35
IN10: Supply Fan Status
36
IN11: Filter Status
36
IN12: Exhaust Fan Status or Coil Defrost
37
Zone Sensors
38
Space Temperature Measurement
38
Zone Sensor Setpoint Thumbwheel
38
Fan Mode Switch
38
On/Cancel Buttons
39
Zone Sensor Communication Jack
39
Service Pin Message Request
39
Zone Sensor Wiring Connections
39
Chapter 4 Sequence of Operation
41
Control Modes
41
Space Temperature Control
41
Control Gains
42
Heating/Cooling Mode Control
42
Cooling Operation
45
Heating Operation
46
Space Temperature Setpoint Arbitration
46
Discharge Air Temperature Control
48
Heating/Cooling Mode Control
49
Power-Up Sequence
50
Occupancy Modes
51
Occupied Mode
51
Unoccupied Mode
51
Occupied Standby Mode
52
Occupied Bypass Mode
53
Sources of Occupancy Mode Control
53
Determining the Occupancy Mode
54
Timed Override Control
57
Morning Warm-Up
57
Space Temperature Control: Morning Warm-Up
57
Discharge Air Temperature Control: Morning Warm-Up
58
Daytime Warm-Up
58
Cool-Down
59
Space Temperature Control: Cool-Down
59
Discharge Air Temperature Control: Cool-Down
59
Supply Fan Operation
60
Constant-Volume Supply Fan Operation
60
Variable-Air-Volume Supply Fan Operation: Duct Static Pressure
61
Valve Operation
62
Freeze-Avoidance Valve Cycling
62
Two-Pipe Changeover
63
Entering Water Temperature Sampling
63
Three-Way Valve Applications
63
Two-Way Valve Applications
64
Face-And-Bypass Damper Operation
65
Outdoor Air Damper Operation
66
Mixed-Air Temperature Control
67
Economizing
68
Low Ambient Damper Lockout
69
Exhaust Fan Operation
69
Electric Heat Operation
70
Space Temperature Control: Electric Heat
71
Discharge Air Temperature Control: Electric Heat
71
Staged Electric Heat
71
DX Cooling Operation
74
Staged DX Cooling
75
Defrost Operation
75
DX Split-System Cooling
76
Dehumidification
78
Occupied and Unoccupied Mode Dehumidification
78
Unit Protection Strategies
80
Filter Status
80
Freeze Avoidance
80
Overrides
81
Manual Output Test
81
Emergency Override
81
Water Valve Override
82
Chapter 5 Configuration
83
Chapter 6 Verifying Operation and Communication
93
Test Button
93
Performing a Manual Output Test
94
Service Pin Button
96
Interpreting Leds
96
Binary Output Leds (Green)
96
Service LED (Red)
97
Status LED (Green)
97
Comm LED (Yellow)
98
Required Inputs for Unit Operation
98
Diagnostics
99
Resetting Diagnostics
99
Interpreting Multiple Diagnostics
100
Chapter 7 Troubleshooting
103
Appendix
111
Unit Operation Based on Heat/Cool Mode
111
Entering Water Temperature Sampling
115
Input Sensor Tables
116
AH540/541 Network Variables
119
Index
125
Reader Response Form
131
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Trane Tracer AH540 Specifications
General
Model
Tracer AH540
Display
LCD
Input Voltage
24 VAC
Communication Protocol
BACnet MS/TP
Memory
Flash
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