I DONT KNOW IF I DID THE MATERIALS RIGHT BUT I USED 2 TRANSFORMERS HERE Completed full maintenance on split system unit Checked all wiring and components Tested refrigerant levels, and temperature Tested capacitor Tested fan and compressor amps Hosed off condenser coils Vacuumed and flushed condensate line Took temperature splits from supply and return Tested blower wheel amp Tested float switch Changed filter System is up and operating at this time Customer already has one UV light in the supply duct. There is still a lot of bacterial growth growing inside. The air handler cabinet. Customer approved of the installation of a 24 V UV light. I installed on site. UV light is operational and system is operating.