Viessmann Trouble Slow Heat Up

[townfanjon]

When he comes back get him to re- route the expansion hose .

 

[Julian Such]

I am just a consumer but you guys have been great, I take it because of the sharp turn in the hose?

 

[townfanjon]

I am just a consumer but you guys have been great, I take it because of the sharp turn in the hose?

Yep , when you have seen them split you would know why

 

[Julian Such]

Update - And more advice please....

Ok So if you recall my fitter fitted a two pipe system to my Viessmann 200w System boiler which was a no-no. This has now been refitted to a four pipe system. Two weeks on and we seem to be heading in the right direction. However I am getting some vibration, later in the day which can be heard in the room below. The engineer advised that I need two bypass valves as the system is presently responding to the standard valves closing and taking longer to switch off without these. This seems to make sense, any thoughts as to this approach?

 

[999]

You don't need any motorised valves if using the 4 pipe system with a cylinder sensor. That's the way I would set it up.