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you will also need to allow about 30 minutes for the cylinder to heat up for the hot water availability during that DHW ON period, as unlike a combi it isn't instaneous, although you may have hot water stored from the previous period.

you need to tell your programmer when you want hot water and how long you want it for.. i.e 90 minutes in the a.m. and 90 minutes in p.m... depending on your house requirements. If the cylinder needs replenishing it will ask the boiler and if this is during your DHW ON period then it will...

Hi As hot water leaves teh cylinder from the top outlet, cold water feeds in at the bottom. You are correct that there is a heat exchanger or 26kw coil inside the cylinder which has hot water running through it supplied via the boiler. This coil transfers it's heat to the surrounding water in...

Hi Netview You will also need to see if the expansion bubble is intact within the cylinder. To do this, turn off the cold supply in the airing cupboard next to the cylinder, then go to teh nearest hot tap and open it. If the hot water runs out of the tap for less than 10 seconds and stops...