The HDT-6 delay timer offers six stages of delayed start  for air-conditioning units and any other load staging application. Time delays are user adjustable via a set of dip switches offering time delays from 15 minutes down to 4 seconds. Their is also a test position which enables the user to quickly time out all the stages. The HDT-6 delay timer is ideally suited for DIN rail mounting in a switchboard, or directly inside the A/C unit if required.