Browse Forums Heating, Cooling & Insulation 1 Nov 19, 2012 7:34 pm Hi can anyone tell me where I can find information about cost of running this unit brivis ice series 38CDA21A9, and if anyone has it what is it like ? this is a 3 phase unit, any info will be appreciated. The new model is 38CDA21B9. Not sure what the difference is. I called brivis direct but she had no idea, thats customer service this days. Thank You Re: Brivis ice series ducted air conditioning 38CDA21A9 2Nov 20, 2012 5:58 pm Just for your info a 18kw brivis outdoor unit uses 10 amps each phase at full load approx 22 amps total? this is avail on brivis website. 22 amps x 230 volts = 5060watts 5060/1000 = 5.06kw depending on your power cost at an average 22c = $1.11 hour plus an additional 20c or so an hour to run internal fan. approx $1.30 an hour Re: Brivis ice series ducted air conditioning 38CDA21A9 3Nov 20, 2012 6:18 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 ? Re: Brivis ice series ducted air conditioning 38CDA21A9 4Nov 21, 2012 8:40 am If it is designed correctly it may even be less than this. The system you have specified is quiet large. If you want to keep running cost low then zone has a good effect on this as well as removing the west sun from touching onto your house. As well as the other usual energy saving tips. Re: Brivis ice series ducted air conditioning 38CDA21A9 6Nov 26, 2012 10:09 pm rockydibs 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 30, 2012 12:35 am 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 9:21 pm kassan1973 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 3243 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 3534 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 |