Something

t1 = Thread.new do
  24.times do
    aps.each do |ap|
      poll.host = ap.ipaddress
      poll.setup
      poll.device.ap_db_dump(poll.host, poll.device.ap_items)
    end
    sleep(3600)
  end
end

t2 = Thread.new do
  288.times do
    aps.each do |ap|
      poll.host = ap.ipaddress
      poll.setup
      poll.device.su_db_dump(poll.host, poll.device.su_items)
    end
    sleep(300)
  end
end