No transformer 24v. Lost track of wiring,sample;wiring going for heat section, wiring for cooling section, wiring for fan section. This unit is not using circuit board.the tranformer just has two wires red and something to produce 24v.how would you connect together.

We have 4 units of package roof top units working on 3 phase and 440 volts and control voltage is 24 volts consisting of 2 compressors , 2 out door fan and one blower. Model No : 50CH009900 needs complete spare parts catalouges including electrical wiring.