Cut in location for main humidifier. Installed unit. Cut in location for start collar. Installed bypass 6â€in pipe. Three 90 elbows and two feet of straight 6†pipe. Cut in and installed control board. Wired in new step down transformer. Wired power to unit and control board. Wired unit into furnace terminal strip. Ran drain line to unit. Wired in outdoor sensor. Installed piercing valve and new water line. Cycled system several times. No leaks found. System operating normal at this time. Job complete.