Flow

[Roger Welton]

Went to service this boiler today,



Just firing it up to test, to find it wouldn't fire for more than a couple of minutes, then was cycling every 30 seconds or so. Customer keeps heating and hot water on 24-7 so wasn't aware of a problem as system did eventually get up to temp.



See a problem

 

[Best]

22mm pipes!

 

[Roger Welton]

To be fair he did the return in 28 though :19:

 

[Bunker]

Crikey, on a big boiler like that! Isnt the 28 on the flow not the return?I and is that 2 pumps in the return? That would help I guess.

 

[Roger Welton]

Nope 22mm flow into 15-60 pump, 28mm on return. Really don't understand why whoever did it didn't think it seemed odd.

 

[Bunker]

Ah, I dont fit many Grants but thought the FLow was the upper one. Lower pipe looks like it splits and goes into 2 pumps.. - just my eyes