The actual installed load is calculated only when the “Calculate actual cold loads” check box in the Hanger design criteria dialogue box is marked.This load case Caesar2 automatically creates. Result comes in the hanger table. Or we can "KEEP" in load cases.
(Note: Ambient is 11deg C and direction of nozzle is X – nozzle report may be corrected!!.) When compared the results, one restraint summary have more or less uniform loads in direction and magnitude. Other one have operating load in negative direction and sustained load in positive at the nozzle node and all other nodes have uniform loads. This means already the spring is pushing the piping upwards in sustained condition (All the other parameters same, but there is no thermal effect). So naturally when the content is not there, spring will push the nozzle further to upward direction and have higher nozzle load in positive direction.
My observations for further comments.