Garmaine Staff asked 2 years ago

A set of three air-conditioners cool a storage building in an American sub-tropical environment. There is no heat: AC only. Cooling is signaled by switching the RED (24V) to:

  1. Yellow wire (cooling relay) AND
  2. Green wire (Fan relay)

When cooling is engaged the same 24V from the red wire is connected to both the Yellow (cooling relay) and Green wire (Fan relay).

For a given AC unit, is there any reason to not short the yellow wire to the green wire? This would simplify the controller design and reduce wiring for a set of three air conditioners.