New boiler fitted Alpha E-Tec 28.

[Shaun Taylor]

As above new boiler fitted and new Hive, Hive is set up correctly and works as it should but when it comes to scheduling on/off times via Hive the boiler doesn't cooperate, the radiators are set at 50 on the boiler but when the temp drops below this on the boiler it fires up. Now my way of thinking is I don't want the heating on during the day but the boiler thinks I do. Any help would be great, I have done the switch off and on with the boiler and the Hive.

 

[gmartine]

Then it doesn't work as it should, the timer/programmer hasn't been set up correctly as it should over ride any boiler parameters.

 

[Deleted member 120897]

Possibility that a link has been left in?

 

[fowlerboi]

The 50 on the boiler is the flow temperature. It should be at around 70.

It does sound like a wiring issue. Can you take the rubber caps off the lower panel out and unscrew it, you'll see a wiring panel with an electric symbol, if you unscrew that and then take a photo of the wiring it will be easy to tell if they've left the link in or wired the hive into the wrong spot.

 

[Deleted member 120897]

The 50 on the boiler is the flow temperature. It should be at around 70.

Why should that? It’s a combi, lower flow temps are allowed.

 

[fowlerboi]

Why should that? It’s a combi, lower flow temps are allowed.

Will it not mess with the delta T and cause the rads to be undersized?

 

[Deleted member 120897]

Will it not mess with the delta T and cause the rads to be undersized?

It won’t make the rads undersized and delta T for rads shouldn’t be affected. If anything it’ll help with the condensing side of things.

 

[fowlerboi]

It won’t make the rads undersized and delta T for rads shouldn’t be affected. If anything it’ll help with the condensing side of things.

Delta T = (flow + return)/2-room temp

At 50 flow you're Delta T is going to be 30 at a maximum using 20 as a room temperature. That would require some massive radiators. For example a 600x1200 p+ at a Delta T of 50 would require a 600x2400 p+ for a Delta T of 30