Nortek global hvac reznor does not endorse any field changes to factory wiring schemes also note that certain field modifications may occur to accommodate the use of other control systems all servicing of product should be performed by a licensed contractor according to local and national code requirements. Collection of york rooftop unit wiring diagram a wiring diagram is a simplified standard pictorial depiction of an electrical circuit it reveals the parts of the circuit as streamlined forms and also the power and also signal links between the tools. 5276177 jim d 0118 johnson controls unitary products 5 nomenclature series 40 model numb er nomenclature 25 40 ton single package 1 1st generation. I need the wiring diagram for a york d4cg048 rooftop unit if anyone can help please answered by a verified hvac technician. Wiring diagrams single package rooftop gas heating electric cooling units 580f 036 150 3 to 121 2 tons field control wiring field power wiring accessory or optional wiring to indicate common potential only not to represent wiring ground capacitor notes for fig 1 7 1 if any of the original wire furnished must be replaced it must be
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