I'm looking at possible energy savings when it comes time to start replacing equipment. Here is a short list of the rooftops I have to work with:
Trane SFCA -753-2b type 268-532-1-8
Trane SACA (cant read entire model number) Type 263-531-1A (10 ton?, unit cooling only, no heat)
Units I believe are 220v 3 phase. I'm wondering what kind of energy savings can be realized by going to newer multistaged equipment such as the lennox strategos, compared to the current units and compared to units such as the lennox landmark series (this building is locked to lennox equip for all intents and purposes). A couple other tidbits of info: Elec cost is roughly $.066 per kwh, and the building has a demand charge of $7 per KW (figured on 15min intervals) in the summer and $3.5 per KW in the winter.
Also, it appears the SFCA units are 150k btu in, 112k btu out at approx $5.5/MCF. Can you foresee any savings in the heating side with the multistage equip.
One final point to mention. I have one banquet room that is approx 2,500 sq ft. that uses 2 of the SFCA units and 1 of the SACA units. Only the 2 SFCA units provide heating to the space during the winter.