Read the nameplateIs there a rule of thumb to determine amperage of an HVAC Roof Top Unit (RTU) when voltage, phase and tonage is known?
Are you bidding off of a set of prints?This is for estimating purposes. I'm taking the information given to me from the HVAC drawings. At this time the nameplate is not available.
Without a type & model number you can't estimate amperage.Otis221 said:Is there a rule of thumb to determine amperage of an HVAC Roof Top Unit (RTU) when voltage, phase and tonage is known?
Good luck... RFIYes. There is no information given on the electrical drawings for the RTU's (no equipment schedule or panel schedules).
Submit a Request For Information.Yes. There is no information given on the electrical drawings for the RTU's (no equipment schedule or panel schedules).
When you get a written design narrative it usually gives you a list of RTU's..Stand facing the prints, take all the 'rule of thumb' formulas you've been given and toss that crap out and request more info.