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AAON MODGAS-XWR2 Technical Manual

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Technical manual (38 pages)

Table Of Contents

Table of Contents

Table of Contents
Overview
General Information
Dimensions
Figure 1: MODGAS-XWR2 Module Dimensions
Wiring
Important Wiring Considerations
Table 1: Electrical and Environmental Requirements
Stand-Alone Wiring
One Modulating Valve, One Ignitor, One Stage (1V1IGN1S)
Figure 2: Stand-Alone Wiring - One Modulating Valve, One Ignitor, One Stage
Two Modulating Valves, Two Ignitors, Two Stages (2V2IGN2S)
Figure 3: Stand-Alone Wiring - Two Modulating Valves, Two Ignitors, Two Stages
Figure 4: Stand-Alone Wiring - Secondary Board 2V2IGN2S
Two Modulating Valves, One Ignitor, One Stage (2V1IGN1S)
Figure 5: Stand-Alone Wiring - Two Modulating Valves, One Ignitor, One Stage
Figure 6: Stand-Alone Wiring - Secondary Board 2V1IGN1S
Two Modulating Valves, Two Ignitors, One Stage (2V2IGN1S)
Figure 7: Stand-Alone Wiring - Two Modulating Valves, Two Ignitors, One Stage
12 Relay E-BUS Expansion Module
Figure 8: Stand-Alone Wiring - 12 Relay E-BUS Expansion Module
Communications Wiring
One Modulating Valve, One Ignitor, One Stage (1V1IGN1S)
Figure 9: Communications Wiring - One Modulating Valve, One Ignitor, One Stage
Two Modulating Valves, Two Ignitors, One Stage (2V2IGN1S)
Figure 10: Communications Wiring - One Modulating Valve, Two Ignitors, One Stage
Two Modulating Valves, Two Ignitors, Two Stages (2V2IGN2S)
Figure 11: Communications Wiring - Two Modulating Valves, Two Ignitors, Two Stages
Figure 12: Communications Wiring - Secondary Board 2V2IGN2S
Two Modulating Valves, One Ignitor, One Stage (2V1IGN1S)
Figure 13: Communications Wiring - Two Modulating Valves, One Ignitor, One Stage
Figure 14: Stand-Alone Wiring - Secondary Board 2V1IGN1S
Inputs and Outputs
Table 2: MODGAS-XWR2 Inputs and Outputs
Sequence of Operation
Operating Modes and Min Mode
Heating Mode
Valve Failure, Force Mode and Master Vs. Normal
Lcd Screens
Navigation Keys
Figure 15: LCD Display and Navigation Keys
Table 3: Navigation Key Functions
Table 4: Editing Key Functions
Main Screens Map
Main Screens
Alarms Menu and Slave Alarms
Setpoint Screens
Force Valves Screens
Protected and Configuration Screens
Configuration Screens
Troubleshooting
LED Diagnostics
Table 5: STATUS LED Blink Codes
Table 6: ALARM LED Blink Codes
Figure 16: MODGAS-XWR2 LED Locations and Descriptions
Alarms
SAT Sensor Testing
Table 7: 0-3V Temperature Sensor - Voltage and Resistance for Type III Sensors
Table 8: 0-5V Temperature Sensor - Voltage and Resistance for Type III Sensors
Appendix A: Sat Sensor
Installation
Figure 17: Supply Air Temperature Sensor Installation
SAT Sensor Wiring Guide and Jumper Settings
Table 9: SAT Wiring Conditions
Table 10: Stand-Alone Mode SAT OPTIONS Jumper Settings
Table 11: Communication Mode SAT OPTIONS Jumper Settings
Appendix B: Modgas-Xwr Replacement
MODGAS-XWR2 Replacement of MODGAS-XWR
Figure 18: MODGAS-XWR2 Module

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