Combi boiler left dormant for 3 years.

[macackau]

Got a job booked for tomorrow to re-instate a combi that hasn't been used for 3 years. It has been left full of water. I'm thinking to flush system through with fresh water and then follow MI commissioning and servicing instructions. Any other advice?

 

[jonnyswamp]

What manu is it
I did similar a month or so back with a Ferroli, ended up changing every "O" ring and washer on the boiler
If you know the make and model, may help to get some washers etc beforehand

 

[clarky101]

Make sure the pump is free....

 

[macackau]

Thanks for the replies. Unsure of make and model, good point about the o-rings, if I get a feeling it's going to need them replaced then I'll order them up before doing any work on it. Wouldn't be surprised if pump has siezed.

 

[stevetheplumber]

if its had water in the rings and gaskets are usually ok pump and fan might need a spin

 

[Roger Welton]

I'd check the exp vessel also, probably will have lost its charge.

 

[mfgs]

Pump and fan will be the things that will more than likely need attention. Definitely give it a flush through once its all heating up and then some inhibitors after.