There is nothing regarding hot/heavy t/off's in the FCTM. However the following procedure is based on encountering turbulence during flap retraction
Ref FCTM Sup Ops,Adverse WX
For takeoff in high turbulence, the flight crew must wait for the target speed +20 kt (limited to VFE-5)
before retracting the slats/flaps (e.g. the flight crew must wait for F+20 kt before setting Flaps 1).