Browse Forums Bathrooms and Laundry Re: Hot water control pads 6Jun 05, 2015 4:53 pm Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . Re: Hot water control pads 8Jun 06, 2015 9:38 am Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . Re: Hot water control pads 9Jun 09, 2015 7:09 am Can the control pads be added later without too much problems? We have a Kelvinator 26L included in our tender but we didn't get the control pads.. if we decided later to have them installed, would that be possible? And if it is, would it be expensive because it wasn't added at the time of the install of the HWU itself? Paddington 29 @ Blue Horizon Estate (Lot 105, Wattleridge Crescent, North Kellyville) Our Build Progress Blog: http://light487.wordpress.com/ Re: Hot water control pads 10Jun 09, 2015 7:42 am In theory yes it is possible to do after but a few caveats. Firstly if you don't have controllers the output temperature can be max 50 degrees but with controllers max 60 set by the kitchen controller only. (Think this is still the case). Now depending upon brand and model you may not be able to get 60 as retrofit. I will give you an example. My house had controllers from the outset so I can set 60 in the kitchen. My neighbour has the same model an Rinnai infinity 24 but not originally fitted with controllers. I retrofitted them for him but could not get it to go to 60. The infinities have switches inside to change the max temp but turns out the model he had was fixed to max 50 and ignored the switches. Re: Hot water control pads 11Jun 09, 2015 9:01 am Quote: Where you might be confused is if you have a solar system, ground pump etc with a storage tank, and instantaneous as a booster, then yes the booster needs to be able to heat to at least 60 to kill the bacteria and then tempered down for safety. Same is true for tanks only. But if using a pure instantaneous and no storage then there is no legionella concern and it can simply heat to the temperature required. I knew about the legionella aspect re tanks but always wondered how solar setups worked. Thanks for clearing that up AJW. Stewie Re: Hot water control pads 12Jun 09, 2015 9:52 am AJW In theory yes it is possible to do after but a few caveats. Firstly if you don't have controllers the output temperature can be max 50 degrees but with controllers max 60 set by the kitchen controller only. (Think this is still the case). Now depending upon brand and model you may not be able to get 60 as retrofit. I will give you an example. My house had controllers from the outset so I can set 60 in the kitchen. My neighbour has the same model an Rinnai infinity 24 but not originally fitted with controllers. I retrofitted them for him but could not get it to go to 60. The infinities have switches inside to change the max temp but turns out the model he had was fixed to max 50 and ignored the switches. Is not having 60 such a big deal though? I mean if it's already switched permanently to be 50 and you connect controllers and find out that it is "stuck" on 50, is that so bad? I assume there is some amount of wiring that would need to be fed back to the HWU? My father is a licenced electrician, so wiring wouldn't be an issue.. just would be fiddly I guess.. but no more fiddly than putting in a new circuit I guess. Paddington 29 @ Blue Horizon Estate (Lot 105, Wattleridge Crescent, North Kellyville) Our Build Progress Blog: http://light487.wordpress.com/ Re: Hot water control pads 13Jun 09, 2015 11:54 am It doesn't get stuck on 50 just that 50 is the maximum. If it was stuck controllers would be pointless. The pint of going higher in the kitchen is higene. Wiring is not much just two wires generally and the controllers of the brands I know Rinnai and Reheem come with cable. One difference is Reheem the bathroom, kitchen and 3rd controller are different parts but Rinnai you can use 4 identical units and they sort themselves out and you do some button pressing to set the kitchen controller. OH Rinnai also has a wireless option too. You wire the wireless transmitter to the heater and away you go. You can also have 3 wired controllers too. But not much help if you have different brand. Re: Hot water control pads 14Jun 09, 2015 12:18 pm Ok thanks. We'll think about it after we move in. Paddington 29 @ Blue Horizon Estate (Lot 105, Wattleridge Crescent, North Kellyville) Our Build Progress Blog: http://light487.wordpress.com/ Re: Hot water control pads 15Jun 09, 2015 2:14 pm Quote: I retrofitted them for him but could not get it to go to 60. The infinities have switches inside to change the max temp but turns out the model he had was fixed to max 50 and ignored the switches. We have a 24L Rinnai - probably 12 years old, and I remember we had problems with the low output of the shower head resulting in a sudden temperature drop so I downloaded a later version manual for the26e which has a diagram for all the dip switch settings ( jumpers ). I'm pretty sure by looking at the diagram - page 26, you can change one of the settings ( computer programming ) so that your neighbours issue is fixed. Stewie Re: Hot water control pads 16Jun 09, 2015 2:39 pm Have the same document, but that is what I was getting at in the post above. The model he had it didn't matter what you dd with the switches 50 was the max that could be selected. Apparently it was a compliance thing. No controllers out of box= fixed 50 degree max (even had a sticker on the front stating this), with controller you could change the maximum temperature using the switches, which then allowed you to choose higher than 50 on the nominal kitchen controller but max of 50 on the bathroom controllers. One thing I never have understood with this method is the controllers don't know what tap is running. So if the kitchen is master and set to 60 and you turn on a bathroom tap you get 60! Re: Hot water control pads 17Jun 09, 2015 10:30 pm I guess as you say if there is one model where you can't adjust the dip switches then that is that. Quote: One thing I never have understood with this method is the controllers don't know what tap is running. So if the kitchen is master and set to 60 and you turn on a bathroom tap you get 60! I would have thought that there would be a bit more electronic trickery built into them these days where the individual controllers "talked" to the main unit but obviously not, even allowing for the fact that it has a small computer chip inside. Stewie Re: Hot water control pads 18Jun 10, 2015 4:59 pm Stewie D I guess as you say if there is one model where you can't adjust the dip switches then that is that. Quote: One thing I never have understood with this method is the controllers don't know what tap is running. So if the kitchen is master and set to 60 and you turn on a bathroom tap you get 60! I would have thought that there would be a bit more electronic trickery built into them these days where the individual controllers "talked" to the main unit but obviously not, even allowing for the fact that it has a small computer chip inside. Stewie It is not an issue of smarts in the controller, the issue is the controllers, nor the heater know which tap has actually be turned on. All that happens is a hot tap is opened somewhere, water flows through heater, heater senses this and decides to heat it to the temperature set on the controller that currently has priority. It wouldn't be hard to put a flow switch in a pipe to know what tap is opened, but that of course adds complexity and cost, and doesn't help much if two hot taps are turned on at once as which one has control? Re: Hot water control pads 19Jun 11, 2015 10:40 am Does anyone know if they help with priority? Example I am in the shower and my MIL (we are including a granny flat in our build) puts the tap on full blast down the other end of the house. In our current house, this seemed to cause an issue, frequent bursts of cold water in the shower. Re: Hot water control pads 20Jun 11, 2015 11:10 am Priority just means the controller with priority is the one that is setting the temperature. Controllers have no effect on water pressure though if you have controllers and only run the hot water tap when showering etc you won't get a temperature drop just a pressure drop. If you run hot and mix with cold then the same issue applies. But that would for the most part be a silly thing to do anyway. the sun master is the solar heating to "warm" the water in the tank the S26 is your hot water system which will heat the water (25 degrees?) so with both turned on you… 2 14790 I want to build a decking to the drawn shape outlined in black. The problem is how close can I build to the gas hot water unit? Will I be able to build around it and be… 0 20633 DIY, Home Maintenance & Repair Hi, I've got a brand new (2nd hand) Bosch Hydropower 16H tankless hot water heater. Since it was installed I have noticed it leaks a lot. I took the cover off and it looks… 0 24974 |