The proposed system includes an ERV serving two packaged rooftop units. In the proposed, I’d like to eliminate the heating in the rooftop unit planned for morning warm-up operation but keep the heating coil in the baseline.
Is the heating coil in the proposed packaged rooftop unit used for morning warm-up considered a preheat coil and therefore required to follow G18.104.22.168 Preheat Coils?
TRACE700 schematics identify the preheat coil in the system level to be located in the mixed air stream. I define a preheat coil as one located for outdoor air tempering only, in the pre-mixed air stream.
Any guidance is greatly appreciated. - Rock