central heating programmer

[Tonra]

Had Worcester Bosch boiler installed recently. Also a Drayton Digistat + RF Wireless System Room Thermostat. Didn't have room thermostat before. Programmer wasn't replaced it is an acl Lifestyle Model LP 112. Both the HW and CH on the programmer are set to come on twice a day and do so but the boiler fires up frequently and the HW light comes on outwith the set times. Installer says the programmer is faulty but it worked perfectly before the installation. Can anyone shed light on this?

 

[D_Hailsham]

Had Worcester Bosch boiler installed recently.

Which model?

 

[Tonra]

Had Worcester Bosch boiler installed recently.

Which model?

Hi there
It's a GREENSTAR 24 Ri

 

[mysteryman]

Sounds like a wiring error. It could be that your wireless room 'stat is going into night setback at too high a temperature, but you would still have a wiring error as well.

 

[Tonra]

Sounds like a wiring error. It could be that your wireless room 'stat is going into night setback at too high a temperature, but you would still have a wiring error as well.

Thanks for input - Even with the CH at the off position, if the HW is set at timed both the boiler & the HW light switch on & off intermittently outwith the set times. I can only control it by keeping the CH on timed and the HW at off.

 

[D_Hailsham]

How many motorized valves do you have and which type - see pics below?

View media item 5946 View media item 11762

 

[Tonra]

How many motorized valves do you have and which type - see pics below?

View media item 5946 View media item 11762

Thanks again for assistance and apologies for delay in replying.
There is one motorized valve and it is a SUNVIC. I think it is a 2 port but not sure.

 

[D_Hailsham]

There is one motorized valve and it is a SUNVIC. I think it is a 2 port but not sure.

You can check which type by counting the pipes!

If it has only two pipes, is it connected to the HW cylinder?

 

[Tonra]

There is one motorized valve and it is a SUNVIC. I think it is a 2 port but not sure.

You can check which type by counting the pipes!

If it has only two pipes, is it connected to the HW cylinder?

Thanks again - Sorry, yes the motorized valve is definitely a 2 port! It is connected to a pipe which feeds from the cylinder, albeit it is some distance from the cylinder. It also has an electric cable going to the pump. Something else I realise I'd forgotten to mention is that, on the programmer, prior to the installation the indicatior arrow appeared for 0N, OFF and TIMED on both the CH and HW sides. It still does on the HW side but now on the CH side it only appears at TIMED. Is this significant?
It's obvious I'm a layman at this but grateful for your help!