Adjusting to a Combi Boiler

TELLIT01

rach_k wrote: »

Three minutes? Does this vary by how far you are from the boiler? I just tested ours and the kitchen tap is warm after 10 seconds and hot by 20 seconds. The boiler is more or less above it on the first floor so perhaps that's why?

10 to 20 seconds are also the timings that I get, and that is in a reasonably large house. If it took 3 minutes I would be on to somebody to get it sorted out. As for not being able to turn the hot water off and on?! I would say there is a fault with the boiler, not a general issue with combi systems.

neilmcl

TELLIT01 wrote: »

10 to 20 seconds are also the timings that I get, and that is in a reasonably large house. If it took 3 minutes I would be on to somebody to get it sorted out. As for not being able to turn the hot water off and on?! I would say there is a fault with the boiler, not a general issue with combi systems.

It really can depend. My kitchen and bathroom taps take seconds to get warm but even then it'll take a minute or two until the boiler temp reaches around 60 degrees for DHW, quicker if the heating is on. The DHW feed in my parents bathroom takes quite a circuitous route which does mean letting the hot water tap run for a few minutes before turning on the shower in the morning. Again this is where the pre-heat function has been deliberately turned off (ie, set to ECO mode).

coffeehound

Yes in this flat it is a good three minutes before the shower temperature is stable enough to use. The pipes take a fairly long route up into the loft and back down, and also I have the 'keep warm' setting off.

I guess installations where the tap water runs hot within a minute have the 'keep warm' setting on, or have a combi that has a small storage tank.

If you turn the shower on and off, the water will run alternately hot and cold before it recovers to a stable temperature due to the water left in the heat exchanger followed by cold water flowing through before it is being heated again.

Mee

Thank you for the advice everyone especially those referencing the 'keep warm' setting.

I think I'm on a bit of downer about the whole thing as I discovered the HA are using a Keston (now owned by Ideal) as they are the only ones manufacturing a twin flue boiler (Combi C30). I came across some poor reviews and it doesn't have an ERP any higher than my existing boiler. I think the equivalent for 'keep warm' is 'pre-heat' on this type of boiler.