I have a question about the script of PBEQ

solve dcel @dcel nclx @xcel ncly @ycel nclz @zcel maxit 1000 -
epsw 80.0 epsp 4.0 temp 298 watr 1.4 intbp
set ener80 = ?enpb

solve dcel @dcel nclx @xcel ncly @ycel nclz @zcel maxit 1000 -
epsw 1.0 epsp 4.0 temp 298 watr 1.4 intbp
set ener1 = ?enpb

The first one is for protein in solvent surrounding. so we set the parameters of epsw is 80.0 for water molecule
and epsp is 4.0 for protein inside, water probe radius is 1.4 angs.

and the second one is for protein in vacuum surrounding. we set the parameters of epsw is 1.0 for vacuum. Do we need
to set the probe radius is 1.4 angstr?
Or maybe we can set the parameter of watr is 0.0?


Thanks~