Jan 23, 2014 · Return water does not always have to be as hot as the tank temp -- if incoming water is 70, returning boiler water should be somewhere between that and the supply water temp. I would experiment with lowering the supply temp for DHW priority and see what you can live with.
Feb 18, 2021 · Add Air. If the pressure setting reads less than 12 PSI (it probably will since you drained water from the tank), attach an air compressor or hand air pump to the air-fitting connection, and pump air into the expansion tank. If your pump has a pressure gauge, add air until the pressure is 12 PSI.
So the red reset button on your electric water heater keeps popping out and needing to be reset. Here's the most likely problem: The water in your water heater is getting too hot. When the water temperature in your water heater exceeds 180°, the red reset button (also known as the high-limit switch) trips.
Heating boiler expansion tanks are metal tanks of varying sizes that are installed to absorb the initial pressure increase that occurs when the heating boiler system warms up. Air molecules entrained in water inside the heating boiler itself as well as in the heating system piping, baseboards, or radiators, expand and thus cause an initial pressure increase in the heating system.
Boiler keeps losing pressure: 7 possible reasons why - DIY
Expansion tanks: how to diagnose & bleed a waterlogged hot
1. expansion tanks on heating systems absorb the pressure increase caused by heating water in a home heating boiler - for heating the occupied space - to avoid possible spillage at the relief valve 2. expansion tanks on hot water making systems such as a gas, oil or electric water heater (geyser, cylinder) used to produce hot water for bathing or washing is used on some systems to avoid occasional high pressure surges that can cause relief valve spillage 3. water pressure tanks …
Do I need a water tank with a combi boiler? | Viessmann
Jan 25, 2018 · To put it simply, you have a leak. If there is apparently no leak in the home but the boiler pressure still keeps dropping, the culprit may be one of the boiler's internal components. If you find that you're often having to top up the boiler this way, you can't afford not to find the source of the leak …