Use /describe instead of /me.

Code:
on me:*:join:#829=1: {
  .timerdescribe 0 300 decribe $chan @local.hub.live.gay.com sets mode for Manila room Channel #829=X +tnl 100 -M
}


Note that if that @local.* part is a custom window that you want your action to appear in, then remove $chan from that line. Otherwise, leave it as-is and it will display in the channel.