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Vaillant boiler feeding hot water tank
Anonymous user 28/02/2024 - 4.01 PM
We have a vaillant boiler in the kitchen which feeds hot water upstairs toa hot water tank which has a grundfos pump. The pump on the tank will start up randomly even when boiler controls are set to off. When I put the hot water on using the boost control I get a flashing radiator on my boiler display screen but I've read that means heating (the heating off) should it not be a flashing tap.
Are you a tradesperson and able to answer this question?
2 Answers
Chris Holloway & Sons Plumbing & Heating Services
Rating: 5 out of 5
Boilers have a pump protection that will run the pump every say 24hrs so the impeller doesn’t seize inside the pump
The radiator symbol is just telling you that the boiler as had a call for heat, combi boilers show symbols for both system boilers don’t so no need to worry
Answered15 July 2021
9
PDunn
Rating: 5 out of 5
Ok depending on the pump - if the pumps an ( orange) brass secondary pump?
If its one grundfoss pump in the whole question would mean there is a call for boiler to fire up (flashing).
The tap symbol isn't a symbol on the system boiler - only on combination type.
Can be done ✔
But as the boiler does two things there's only the one symbol to significantly say there is a call whether its for hot 🔥 water 💧 or for central heating.
Hope this helps.
Pd
Answered6 August 2021
1