WebFeb 18, 2024 · The boiler will continue to run due to demand from the cylinder stat but with sporadic flame as system temp drops. At this stage the pump will continue to run from the switched live to the boiler not the pump overrun. The pump overrun only kicks in when there’s no call for heat/hw but the temp is still high. WebNov 25, 2024 · Takeaways. Pump overrun is a normal function of a heating system. After the boiler has been switched off, the pump circulates the water to dissipate any residual … We won’t let your cleaning and maintenance problems get to you. …
Adding a pump overrun - HomeOwnersHub
WebNov 26, 2003 · E. Ed Sirett. posted. 19 years ago. Show Quoted Text. A way to do this as I understand it: Connect the pump to the common pole of the changeover switch, connect the boiler demand to the pole which is closed when the pipes are cool, connect a permanent live feed to the pole which is closed when the switch is hot. WebApr 17, 2015 · There is no pump overrun thermostat, but the boiler comes with a link in the control panel that goes from terminal 1 to 4, that probably should have been removed when the programmer was fitted. This will put a permanent feed to the pump whilst there is a permanent live feed to the boiler. promote website
What Can Cause Header Tank Overflow? Builder & Engineer
WebMar 28, 2024 · An overrun timer is fitted to the existing pump. The pump runs during call for heat plus 1 or 2 minutes after that due to the overrun timer. In the en d it does the same job the 4 series boiler does, presumably an overrun time r is cheaper than adding a wire to feed power from boiler to pump. NT. WebNov 27, 2011 · The water is set to run for 2 hours, the tank reaches temperature in 15 - 20 mins! then boiler starts pump overrun and then anti-cycling mode. I've deliberatly over sized the boiler planning to extend / convert garage in the near future, calculations show I needed 14.2KW (cuurent radiators + Water), or 17.7Kw depending on method used. WebDec 21, 2024 · The boiler thermostat is several years old so there is a good chance that the pump overrun set point has drifted over time and is now higher than it should be. The … promote webpage