Question-and-Answer Resource for the Building Energy Modeling Community
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To diagnose a problem like this, I would add output variables to confirm if the boiler is operating and also look at the system node temperatures and mass flow rates on the plant loop to see what is happening. For example, is the pump operating on the boiler loop? I assume you've found example file IndirectAbsorptionChiller to reference. And it sounds like you may have already added outputs like these:
Output:Diagnostics, ReportDuringWarmup;
Output:Variable,*,Plant Supply Side Cooling Demand Rate,hourly; !- HVAC Average [W]
Output:Variable,*,Plant Supply Side Heating Demand Rate,hourly; !- HVAC Average [W]
Output:Variable,*,Plant Supply Side Inlet Mass Flow Rate,hourly; !- HVAC Average [kg/s]
Output:Variable,*,Plant Supply Side Inlet Temperature,hourly; !- HVAC Average [C]
Output:Variable,*,Plant Supply Side Outlet Temperature,hourly; !- HVAC Average [C]
Output:Variable,*,Plant Supply Side Not Distributed Demand Rate,hourly; !- HVAC Average [W]
Output:Variable,*,Plant Supply Side Unmet Demand Rate,hourly; !- HVAC Average [W]
Output:Variable,*,Boiler Heating Rate,hourly; !- HVAC Average [W]
Output:Variable,*,Boiler Mass Flow Rate,hourly; !- HVAC Average [kg/s]
Output:Variable,*,Pump Mass Flow Rate,hourly; !- HVAC Average [kg/s]
Output:Variable,*,System Node Temperature,hourly; !- HVAC Average [C]
