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MODGAS-XWR2 Technical Guide
OVERVIEW ....................................................................................................................... 5
General Information ................................................................................................................................................ 5
Dimensions ............................................................................................................................................................. 6
WIRING ............................................................................................................................ 7
Important Wiring Considerations ............................................................................................................................. 7
STAND
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ALONE WIRING .................................................................................................. 8
One Modulating Valve, One Ignitor, One Stage (1V1IGN1S) ................................................................................. 8
Two Modulating Valves, Two Ignitors, Two Stages (2V2IGN2S) ............................................................................. 9
Two Modulating Valves, One Ignitor, One Stage (2V1IGN1S) ...............................................................................11
Two Modulating Valves, Two Ignitors, One Stage (2V2IGN1S) ............................................................................ 13
12 Relay E-BUS Expansion Module ..................................................................................................................... 14
COMMUNICATIONS WIRING ........................................................................................ 15
One Modulating Valve, One Ignitor, One Stage (1V1IGN1S) ............................................................................... 15
Two Modulating Valves, Two Ignitors, One Stage (2V2IGN1S) ............................................................................ 16
Two Modulating Valves, Two Ignitors, Two Stages (2V2IGN2S) ........................................................................... 17
Two Modulating Valves, One Ignitor, One Stage (2V1IGN1S) .............................................................................. 19
INPUTS AND OUTPUTS ................................................................................................ 21
Inputs and Outputs ................................................................................................................................................ 21
SEQUENCE OF OPERATION ......................................................................................... 23
Operating Modes and Min Mode ........................................................................................................................... 23
Heating Mode ........................................................................................................................................................ 24
Valve Failure, Force Mode and Master vs. Normal ............................................................................................... 25
LCD SCREENS ............................................................................................................... 26
Navigation Keys .................................................................................................................................................... 26
Main Screens Map ................................................................................................................................................ 27
Main Screens ........................................................................................................................................................ 28
Alarms Menu and Slave Alarms ............................................................................................................................ 30
Setpoint Screens ................................................................................................................................................... 31
Force Valves Screens ........................................................................................................................................... 32
Protected and Conguration Screens ................................................................................................................... 33
Conguration Screens .......................................................................................................................................... 34
TROUBLESHOOTING .................................................................................................... 35
LED Diagnostics ................................................................................................................................................... 35
Alarms ................................................................................................................................................................... 37
SAT Sensor Testing ............................................................................................................................................... 38
APPENDIX A: SAT SENSOR .......................................................................................... 40
Installation ............................................................................................................................................................. 40
SAT Sensor Wiring Guide and Jumper Settings ................................................................................................... 41
APPENDIX B: MODGAS
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XWR REPLACEMENT ............................................................ 42
MODGAS-XWR2 Replacement of MODGAS-XWR .............................................................................................. 42
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