Brawa-Mix Valve Replacement

Is it necessary to drain down a Boilermate II to replace the Brawa-Mix valve? How long should it take to replace the valve?

Hi,

No it is not necessary to drain down a BM2 to replace the Brawa-Mix valve. I have recently changed my Brawa-Mix valve and I didn’t drain down my BM2.
Before removing the old mix valve I would recommend you:
Isolate the BM2 and heat generator (Boiler) from the mains (230v AC).
Turn off cold water feed to the BM2 (very important if you don’t want to be soaked!)
Open a hot and cold tap closest to BM2 to remove water remaining in the heat exchanger coil. You can also open a hot and cold tap at the lowest point in your system too.
You may still get a bit of water during valve removal, so have an old towel and bucket to hand.

When fitting the new mix valve, make sure:
It is in the same orientation as the one you removed!
Use new fibre washers at all compression fittings.

Adjust the temperature by turning the green/white cap on the top of the mix valve. A thermometer or thermocouple is good for measurement if you have one.

Full mix valve replacement can easy be completed in under an hour.

Hope this helps?

Robin

Robin, thanks for the response, pretty much what I thought was the case. I've just had the valve replaced by a plumber who claimed to be an "Approved Gledhill Water Storage Specialist" on an emergency callout. There's hardly any plumbers who know much about Boilermates in London let alone have the part, so I had little choice but to let him get on with it. In fairness he did fit the valve but it took two hours because he initially tried to drain down the system by disconnecting the smaller connection from the F&E tank into the main cylinder and trying to syphon the water out. Of course the hose he had wouldn't fit and he eventually used the drain valve, which he been reluctant to use. Messing about with the F&E tank caused both connections to leak so the second of the two hours was spent fixing these. He either didn't really know what he was doing or he wanted to rack up the hours, if there's a next time I think I'll do it myself!

do you turn the valve head clockwise or anti clock to reduce the temperature ?