Browse Forums Heating, Cooling & Insulation Re: Rheem Air Conditioning - Anyone Use Them? 6Mar 27, 2011 2:46 pm . Block settled 07 June 2011 Our little piece of the Interwebs on HomeOne....... viewtopic.php?f=31&t=48577&start=0 Re: Rheem Air Conditioning - Anyone Use Them? 10Apr 18, 2011 3:33 pm A.Ryder Pepsi_Drinker A.Ryder .....What about ESP+ vs Ultima? The difference is the Ultima has a temp sensor in each zone and lets people in that zone set their own temperature....... How does that actually work ?? I would of thought that the air coming from the fan-coil was a "given" temperature, at the end of the day either (in any brand / technology at all) the compressor is running or it isn't. If it is running then it is putting out a "fixed" quantity of refrigerant liquid / minute, which when expanded in the fan-coil will give a (set) temperature of fan-coil output air. So (for a given range of parameters) let's say the fan-coil output temperature flow is 20 degrees, how can one room set 20 degrees and another set at (say) 25 degrees ? In (some) aircraft this is solved by having the airconditioning pack output temperature set to the temperature requirements of the "coolest zone", in this example 20 degrees, and then adding "Trim Air" to heat the 20 degree air to 25 degrees for the 25 degree-demand zone. Not sure if residential airconditioners do something like this ?? If not, how do they have multiple-temperature zones ? Thanks, P_D (Yes, I *KNOW* all about inverter and other variable-output systems, but at the end of the day, while "x" may vary, they all send one "x" quantity of refrigerant to one fan-coil....) Hi P_D, I don't actually have an Ultima so I'm not able to explore all the intricacies (I have an engineering background, so knowing me I would definitely have dug deeper...) but I wondered about the same question myself so at the time asked my air-tech: he says "All it has is an extra temp sensor for each zone, with a separate controller for that zone, and then all it does is open and shut the zone barrel, and it'll end up being fully open or fully closed and that's it..." So I don't believe you can have all the convoluted examples, like one room at 23 (cooling) and another at 27 (heating). I think if you set the main controller to 20 but then some zone to 25C then that zone will simply have its zone barrel closed all the time and if the ambient temp is 24 it simply wont' reach it's target (of 25). At any rate, I installed post-build so getting all that extra cabling in was not going to happen and I figured if anyone isn't happy with the temp in their zone they can just get off the backside and turn their zone on or off. This has worked well us and most people are happy with about 23 OR they just prefer no air-con at all so I'm happy enough with the ESP+, I dont' miss the Ultima Cheers. Hi A.Ryder, I was wondering how hard it was to install post build. Did you get your builder to do the ducting for downstairs? I've heard that it is quite hard to do the ducting downstairs following handover.. Cheers Skayne 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 8985 wondering anyone built with omaxe homes and care to share their experiences. thanks 0 13821 Hi everyone. I am a single mother with little daughter, living in a small tourist town in WA Australia. I am thinking to install security screens to all the doors and… 0 22741 |