TNY285 POWER SUPPLY WITH MULTIPLE OUTPUTS

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We are using TNY285 in one of our power supply design which having two outputs. Among this , one output will be in continuous use but another output needs periodicaly.

So can i put that sencondory winding of transformer floted , or it will affect the performance ?

Please find attache file also, in which output 9V supply will in continuous operation , but +15, -15 needs periodicaly which we trying to put floated. 

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You can let the +15V/-15V rails operate at no-load. I believe this is what you mean by having the windings floated.