The Update Load Calculation Map command is used to update the load calculation map inserted using the Display Load Calculation Map command. The shading for each room and the scale will be updated to reflect any changes to the design.
To update a load calculation map, go to
Ribbon: DM HVAC->Load Calculations-> 
Update Load Calculation Map
Pulldown Menu: DM HVAC->Load Calculations->Update Load Calculation Map
Design Master HVAC Dialog Box
Press the Yes button to calculate the loads before updating the map.
Press the No button to update the map without recalculating the loads.
The room shading and scale will be updated.