To turn off all other triggers such as time and scroll and keep only the manual option, you need to choose “Manual triggering only” in poll behavior section.
To trigger a poll, just use this function:
window._rd_queue = window._rd_queue || ; window._rd_queue.push(['trigger_poll', POLL_ID]);
POLL_ID is your actual poll ID.
In general, you can’t run multiple polls at the same time.
When you manually trigger a poll on a page that already has a poll present, it will remove the old one and display the one you triggered manually.