Browse Forums Heating, Cooling & Insulation Re: Brivis ice series ducted air conditioning 38CDA21A9 6Nov 26, 2012 9:09 pm ![]() Thanks for your reply I hope you are right, someone at work toll me it cost 4.40 dollars an hour so i nearly had a heart attack. My is 18.34 amps and is a 3 phase unit how do I work this out ? You will need to know if full load or per phase assuming its full load just work out on the above calculation remember this cost is for compressor running non stop if the system cycles as it reduces the temp then it will be less. Just had a look on brivis website yours is a 21kw unit full load amps are around 25-27amps so just work out on that will be very close and ,maybe work to a 70/30% on off ratio. Re: Brivis ice series ducted air conditioning 38CDA21A9 9Nov 29, 2012 11:35 pm Lets work out on 27 amps. 27amps x 230 volts = 6210 watts. 6210/1000= 6.21 kw 6.21 kw x lets say 22c per kwh = $1.36 per hour to run compressor. internal unit runs a 750watt fan 750/1000= .75 kw .75x22c = 16.5c $1.36 + 16.5c = round up to $1.53 an hour to run. Assuming unit cycles on and off at a rate of 70/30 1.53x.7= $1.07 an hour to run Re: Brivis ice series ducted air conditioning 38CDA21A9 11Dec 02, 2012 8:21 pm ![]() Lets work out on 27 amps. 27amps x 230 volts = 6210 watts. 6210/1000= 6.21 kw 6.21 kw x lets say 22c per kwh = $1.36 per hour to run compressor. internal unit runs a 750watt fan 750/1000= .75 kw .75x22c = 16.5c $1.36 + 16.5c = round up to $1.53 an hour to run. Assuming unit cycles on and off at a rate of 70/30 1.53x.7= $1.07 an hour to run This is actually incorrect as you havent multiplied it by three for three phase. BUt since you have over dimensioned the running current it works out about the same anyway. Its easier to just find out the input power and work it out that way. Anybody know any good and reasonably priced Air conditioning contractors/companies that could install a ducted air conditioning system in the Central Coast NSW for a small… 0 8996 Hi Everyone, I am exploring builder in NSW and received a very tempting quote from Wisdom home for their momentum series. I just want to know experience of building… 0 8241 Hi all, sorting out the ducted air con for a 350sqm double story house. Does this placement sound reasonable to you? Also, I plan to have 6 zones I think. Living room… 0 0 |