Robert Tyrrell
Gas Engineer
- Messages
- 701
I've jut been out to a call where the heating system is pretty poor and I'd like some advice on how to remedy the situation. I have my own ideas but would like, and value other people comment/advice on the matter.
They have installed, a Viessman Vitodens 100 WB1B (35Kw) that is being used to heat 19 rads, and a 250ltr DHW cylinder.
The problem is that the DHW is ok but the rads aren't getting hot at all really. I can keep my hand on them all the time, even with the TRV's set to max.
I 'think' that the rads might be sludged up a bit as they're quite old by the look of them, and the DHW has to be on constantly so it's using power that the CH could be using however when I switched off the DHW, at the programmer, there was very little change at the rads. The pipework was getting hot in the boiler room and the display on the boiler was reading 68°. If I put the boiler into SERV mode the display would show 75° and the GR worked out at 35Kw.
I'm going to advise that they have a separate HO boiler installed for the DHW circuit and use the Viessman for the CH, after changing a few rads and giving the system a flush.
There is a ManaClean filter on the return btw but I don't think that the whole system was flushed when the boiler was installed, which was around 2.5 years ago.
If you have any further, helpful, suggestions then I would love to hear them.
They have installed, a Viessman Vitodens 100 WB1B (35Kw) that is being used to heat 19 rads, and a 250ltr DHW cylinder.
The problem is that the DHW is ok but the rads aren't getting hot at all really. I can keep my hand on them all the time, even with the TRV's set to max.
I 'think' that the rads might be sludged up a bit as they're quite old by the look of them, and the DHW has to be on constantly so it's using power that the CH could be using however when I switched off the DHW, at the programmer, there was very little change at the rads. The pipework was getting hot in the boiler room and the display on the boiler was reading 68°. If I put the boiler into SERV mode the display would show 75° and the GR worked out at 35Kw.
I'm going to advise that they have a separate HO boiler installed for the DHW circuit and use the Viessman for the CH, after changing a few rads and giving the system a flush.
There is a ManaClean filter on the return btw but I don't think that the whole system was flushed when the boiler was installed, which was around 2.5 years ago.
If you have any further, helpful, suggestions then I would love to hear them.