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MODGAS-XWR2 Technical Guide

RLY4 - Heat 2

Once the MODGAS-XWR2 brings on heat, Heat 2 (RLY4) is

the second stage of heat if the MODGAS-XWR2 is congured

for two stages of heat. This can either be a modulating heat stage

or xed heat stage.

NOTE: In the 2V2IGN1S conguration, Heat 1 (RLY3)

and Heat 2 (RLY4) are one stage.

RLY5 - Heat 3

Once the MODGAS-XWR2 brings on heat, Heat 3 (RLY5) is

the second or third stage of heat if the MODGAS-XWR2 is

congured for three stages of heat and will be a xed heat stage.

RLY6 - Heat 4

Once the MODGAS-XWR2 brings on heat, Heat 4 (RLY6) is the

third or fourth stage of heat if the MODGAS-XWR2 is congured

for four stages of heat and will be a xed heat stage.

INPUTS AND OUTPUTS

Inputs and Outputs

Table of Contents3
Overview5
General Information5
Dimensions6
Figure 1: MODGAS-XWR2 Module Dimensions6
Wiring7
Important Wiring Considerations7
Table 1: Electrical and Environmental Requirements7
Stand-Alone Wiring8
One Modulating Valve, One Ignitor, One Stage (1V1IGN1S)8
Figure 2: Stand-Alone Wiring - One Modulating Valve, One Ignitor, One Stage8
Two Modulating Valves, Two Ignitors, Two Stages (2V2IGN2S)9
Figure 3: Stand-Alone Wiring - Two Modulating Valves, Two Ignitors, Two Stages9
Figure 4: Stand-Alone Wiring - Secondary Board 2V2IGN2S10
Two Modulating Valves, One Ignitor, One Stage (2V1IGN1S)11
Figure 5: Stand-Alone Wiring - Two Modulating Valves, One Ignitor, One Stage11
Figure 6: Stand-Alone Wiring - Secondary Board 2V1IGN1S12
Two Modulating Valves, Two Ignitors, One Stage (2V2IGN1S)13
Figure 7: Stand-Alone Wiring - Two Modulating Valves, Two Ignitors, One Stage13
12 Relay E-BUS Expansion Module14
Figure 8: Stand-Alone Wiring - 12 Relay E-BUS Expansion Module14
Communications Wiring15
One Modulating Valve, One Ignitor, One Stage (1V1IGN1S)15
Figure 9: Communications Wiring - One Modulating Valve, One Ignitor, One Stage15
Two Modulating Valves, Two Ignitors, One Stage (2V2IGN1S)16
Figure 10: Communications Wiring - One Modulating Valve, Two Ignitors, One Stage16
Two Modulating Valves, Two Ignitors, Two Stages (2V2IGN2S)17
Figure 11: Communications Wiring - Two Modulating Valves, Two Ignitors, Two Stages17
Figure 12: Communications Wiring - Secondary Board 2V2IGN2S18
Two Modulating Valves, One Ignitor, One Stage (2V1IGN1S)19
Figure 13: Communications Wiring - Two Modulating Valves, One Ignitor, One Stage19
Figure 14: Stand-Alone Wiring - Secondary Board 2V1IGN1S20
Inputs and Outputs21
Table 2: MODGAS-XWR2 Inputs and Outputs21
Sequence of Operation23
Operating Modes and Min Mode23
Heating Mode24
Valve Failure, Force Mode and Master Vs. Normal25
Lcd Screens26
Navigation Keys26
Figure 15: LCD Display and Navigation Keys26
Table 3: Navigation Key Functions26
Table 4: Editing Key Functions26
Main Screens Map27
Main Screens28
Alarms Menu and Slave Alarms30
Setpoint Screens31
Force Valves Screens32
Protected and Configuration Screens33
Configuration Screens34
Troubleshooting35
LED Diagnostics35
Table 5: STATUS LED Blink Codes35
Table 6: ALARM LED Blink Codes35
Figure 16: MODGAS-XWR2 LED Locations and Descriptions36
Alarms37
SAT Sensor Testing38
Table 7: 0-3V Temperature Sensor - Voltage and Resistance for Type III Sensors38
Table 8: 0-5V Temperature Sensor - Voltage and Resistance for Type III Sensors39
Appendix A: Sat Sensor40
Installation40
Figure 17: Supply Air Temperature Sensor Installation40
SAT Sensor Wiring Guide and Jumper Settings41
Table 9: SAT Wiring Conditions41
Table 10: Stand-Alone Mode SAT OPTIONS Jumper Settings41
Table 11: Communication Mode SAT OPTIONS Jumper Settings41
Appendix B: Modgas-Xwr Replacement42
MODGAS-XWR2 Replacement of MODGAS-XWR42
Figure 18: MODGAS-XWR2 Module42

Brand	AAON
Model	MODGAS-XWR2
Category	Controller
Language	English

AAON MODGAS-XWR2 User Manual

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AAON MODGAS-XWR2 Specifications

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