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Temperature controls for your heating and hot water. I have had some difficulty in setting the proper temperature limits. If all else fails, the heating element may be failing, and needs to be replaced. As of now I have the High set at 185 and the low at 165. I have found that 40 degree days/nights are so mild that there is little demand for heat, and can get by with half the wood as at 30 degrees, and at 30 degrees we require half the wood as at 20 degrees. If the high-limit temperature setting is too high, generally over 200 degrees Fahrenheit, the system pressure will reach an excess condition as well and start leaking. The average setting for the aquastat (the temperature control device on a boiler) for a forced hot water system is 180°F. Hello, just wondering If I can turn down my oil fired domestic boiler. Each four degree reduction in water temperature could save you around three to five per cent in energy costs. Hot water boiler systems also have a high-limit temperature setting that triggers an automatic shutdown if the water temperature rises above that set point. I am confused about what to set the temperature on my oil burner boiler. The other setting on the aquastat is the differential, which is the temperature-degree difference between the low and high settings at which the boiler will continue to operate. The average setting for a gas-powered hot water boiler is 180°F. The plumber that installed it reckoned it should be set to near enough max (75 deg) on the basis that the boiler will run for less time to get the UFH up to temperature … I was told though that such a low water temp may cause condensation and may not be healthy for the boiler etc. This allows you to set the temperature of the water that leaves the boiler to heat the house. In any event, for some reason, the burner is still running pretty often when there is no demands for hot water. This boiler provides space heat as well as Domestic Hot Water. As indicated in my previous reply, I set the low temperature setting to OFF and also adjusted the temperature setting on the indirect from 125 to 120 because 120 degree hot water should be fine. The higher this temperature is set, the quicker your boiler will be able to heat your home. Now that my hot water issue has been solved, it has got me thinking whether my boiler thermostat is set correctly. Should a call for Domestic Hot Water be detected, the boiler temperature is commanded to return to the High Limit setting, ensuring a As we use an indirect water heater for service hot water that regulates temperature on its own. If the setting is too high, the boiler will use more energy than it should as well as wasting it. Hot Water Boiler Sequence of Operation Aquastats - As boilers go, there is not a single sequence of operation for any hot water boiler out there, but there is a typical sequence of operation for most boilers. Replies: 6 Views: 239. It can be raised as high as 210°F if needed in severe weather. If you lower the temperature, your boiler … Water temps only get to 150* before the boiler shuts off. I have a Honeywell L8124a, c Aquastat and I was wondering what adjustments of the high, low and differential settings would be in my best intrest as far as efficiancy is concerned. well i can control the hot water and central heating temp's on my boilers control panel i am happy with the water at 50 degrees as its just hot enough for a hot bath/shower, but not scalding however, i'm unsure what to set the central heating to. The aquastat was set to … Most boilers are set for 160/180 for baseboard or 150/170 with cast iron rads. Guide to Best Settings for the HI Limit on a Honeywell R8182D Heating Boiler Aquastat & Similar Controls: The "HI" on a combination heating control like this aquastat is usually set by the heating service technician to a spot between 180 °F and 200 °F. adjusts the target boiler temperature to a point below its local high limit setting and above the boiler's condensation temperature by using the EnviraCOM communication bus to directly adjust the Aquastat set-point. In any event, I'm not sure where to look first. Londoner2, 29 Oct 2020, in forum: Plumbing and Central Heating. Hi there: I recently had a L7224U Aquastat (Honeywell's replacement for L8124)installed on a Weil-Mclean Oil Burner. Once you’ve got your boiler running at the optimal temperature, you’ll want to set the timer for when you need heating the most. Radiators throw heat, but the baseboards need hotter water to be effective IMO. In Winter when heating is needed all the time, the boiler water is hot and ready when needed because the house calls for heat often. If you are doing this on a fossil fuel boiler, dropping the operating temps will save fuel. If you find your radiators are scaldingly hot, turning this control on the front of the boiler to a lower setting will reduce the temperature of the rads. The differential is set at 23. However, if you have a compromised immune system or are prone to respiratory conditions, you should consider setting the temperature higher than 120. Thanks The lowest differential is 10 but the recommended differential is 25, which will maintain higher boiler temperatures and offer more hot water than a differential of 10. ? Water this hot must … With a combi boiler, hot water is on demand. For hot water set the combi or cylinder to 60 centigrade, this is not only for achieving optimum hot water quantity it is also to kill off any bugs that occur naturally in water systems. Aquastat is set to 190*. ... Best Temp setting on a combi. This provides the appropriate level needed for most cold weather temperatures. If the boiler is heating hot water then it will need to be set at least 5-6° above the target hot water temperature which is ideally set to 55° making the boiler need to be at least 60°. Or the "rule of thumb" fellows just park it at about "180" °F as you can see in our photo. Tony Agile, 31 Oct 2009 #5. bengasman. ive tried 65 and 70. but my main concern is whats best to save money? There is usually a thermostat attached to the side of the hot water … Secondly, this hot boiler water is used to heat the hot water cylinder. Last night I noticed that the water temp went rose to nearly 220 degrees before the unit cycled off. If the outside temps are milder, then the demand for heat will certainly be lower. For systems that use coils to heat domestic hot water, the high limit setting is 210°F and the low limit setting 140°F. (I forget the percentage, but it is significant.) Setting your central heating for when you’re at home is the most efficient way of heating it. This trades off against the time the circulators are operating, since they will run longer. My goal is to save oil by firing less. The boiler temperature control opens to turn the circulator off if boiler water temperature drops below the low limit to maintain a minimum boiler temperature. So i wondered what temps do you all set the boilers you install at ? A water heater set to 120 degrees may be just fine for most people. The boiler has the normal flow temperature controls on the front for setting the main boiler running temperature and hot water temperature. The HeatManager algorithm will positively affect the hot water available in a system utilizing a tankless coil. Thanks for any input! My vaillant goes up to a max of 75C. Well the house really got hot quickly and the rads were too hot to touch. If you have a family that runs though hot water like there is no tomorrow, then set the boiler at a higher temp. Combi boilers have controls on the unit which allow you to set the temperature of the water that will be circulating around the central heating system and out of the taps. The room reaches the temperature it need to, to satisfy the thermostat. Some have said it could be turned down to 150 degrees or so. On the flip side, if your water heater is set too low your water may not get hot enough (short showers), or worse, be at risk of growing bacteria. Feb 4, 2019 #10. danbrennan Veteran Member Lifetime Gold Member. I have an Utica Boiler using a Honewell L8148E Aquastat. I was impressed with this performance on a high temp, but wouldnt normally have it so hot. If the water gets too hot, the bacteria will die. In the summer, you can reduce the low limit to 140 for hot water. Sometimes the boiler high limit is set higher to get more heat, faster, out of the baseboard, especially when there isn't enough of it. Please note that for best efficiency with Viessmann boilers we would recommend weather compensation, this automatically adjusts the heating boiler flow temperature to the optimum temperature to external weather conditions. Bacteria love a warm place to grow. The default HIGH efficiency setting should work best for most systems. For example, an aquastat is often set to maintain a boiler water temperature of anywhere from 180 to 200 degrees in the winter. Here it gets more complex. To maximise efficiency, we recommend setting your radiator dial to 75 degrees and your hot water to 60 degrees. "The central heating temperature control dial is for controlling the temperature of the water that goes from the boiler into your radiators – not the room temperature. The best setting for combi boilers is often recommended as 75°C for central heating and 60°C for domestic hot water. Of course it could be that you have a control which already raises the boiler temperature just for hot water. Beware of the young and elderly though at this temperature, and there are thermostatic hot water controls valves that can be fitted at outlet points to combat this?? This is not all bad since the room is being actively heated while the pumps are circulating hot (or warm) water. Boiler Temperature Set Points For Residential Baseboard Water Heat Discussion in 'The BS Topic' started by danbrennan, Feb 3 , 2019. Plus, for a learning experience, I am trying to figure why 99.9% of people seem to have much higher water temps. Some boilers have separate controls for the temperature of the radiators and hot water. If you have already set the temperature and are saying to yourself, “I have no hot water” or not enough of it, there are a few factors that may be affecting the heat. Gas and electric water heater temperatures are set at the factory, but can be adjusted for your own preferences with only a couple of tools. And i think it has been running a bit to cold at 60C. However, there is some general advice that can help you use your boiler more efficiently. If you can raise the temperature manually, do not set it any higher than 210°F (which is often the limit), and try to remain down at 190°F if you need the extra heat. Although manufacturer's usually set water heaters at 60C, you can reduce your carbon footprint and save money by adjusting your boiler's hot water thermostat. We will start off describing the typical hot water boiler without domestic hot water or an indirect fired hot water tank. The low setting is currently set at 180 degress. Don’t set your water heater to anything below 120 degrees, as diseases can develop in the stagnant water inside the water heater, particularly Legionella, which is … Can this possibly an issue with my programmable thermostat?

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