Unit 2.1… checked wiring at air handler, condenser, and detector. All look correct. Could not pre test due to kids napping and no alert was sent to teachers. Need to return one morning to smoke test. Unit 427 is for room 427. Changed air handler fuses to 45 from 60. Changed fuses at condenser from 30 to 25. Unit for bathroom got pictures of air handler, condenser, and stat.