I've recently moved into a new house and have two related problems with the current central heating system. It's an open vent Y plan system, so I've got 2 tanks in the loft and a cylinder, pump and diverted valve in the airing cupboard. The boiler is a Potterton Prima F60. The programmer is a Drayton Tempus Three.
The first problem is that I am unable to set separate on/off programmes for the central heating and hot water - they can only be set to come on and go off at the same times. This seems very inefficient as I'm never going to need that much hot water. It is possible for the central heating and hot water to work independently by setting one to 'twice' and the other to 'once' or by overriding the programme. So, the system does allow for the central heating to be on without the hot water and vice versa. I just think that the programmer is so old that it doesn't have the functionality.
I've looked at a Drayton LP522 5/2 day programmer and I'd like to know if I could simply replace the old backplate with the new backplate and wire it up in the same way (it doesn't fit the old one). The terminals and the wiring diagram on the programmers look the same (see photos). However I'm not an expert and I've no idea where the various wires go. Do I risk blowing the boiler PCB by giving it a go?
The second problem is that there is no room thermostat in the house. There are TRVs on every radiator but this is unsatisfactory. Four example, if I want to go out for the day and leave the heating on low, I have to go around the house and turn down the TRV on every radiator (12 in total). When I get back I have to go around and turn them all up again. Also, even when the house is nice and warm the boiler is continually clicking on and off as it checks the temperature of the water in the system. This also seems very inefficient.
I'd like to install a room thermostat and as there is no existing wiring I am thinking about a wireless one. Ideally I'd like have the ability to be able to set the temperature to vary during the day, e.g. 12 degrees overnight when it's really cold, ramping up to 20 degrees just before I get up. My heating engineer cannot seem to find one that will do this. Most seem to be a replacement for the programmer unit and most only seem to work with a combi boiler.
Does anyone have any suggestions for a thermostat/ programmer combination that would do what I want it to? Given my lack of experience with all things electrical, I'm probably going to leave the thermostat to a professional. The heating engineer has quoted me £360 including VAT to fit a new programmer and a wireless but non programmable thermostat. Is this a good price? It sounds a bit pricey given the cost of the parts.
The first problem is that I am unable to set separate on/off programmes for the central heating and hot water - they can only be set to come on and go off at the same times. This seems very inefficient as I'm never going to need that much hot water. It is possible for the central heating and hot water to work independently by setting one to 'twice' and the other to 'once' or by overriding the programme. So, the system does allow for the central heating to be on without the hot water and vice versa. I just think that the programmer is so old that it doesn't have the functionality.
I've looked at a Drayton LP522 5/2 day programmer and I'd like to know if I could simply replace the old backplate with the new backplate and wire it up in the same way (it doesn't fit the old one). The terminals and the wiring diagram on the programmers look the same (see photos). However I'm not an expert and I've no idea where the various wires go. Do I risk blowing the boiler PCB by giving it a go?
The second problem is that there is no room thermostat in the house. There are TRVs on every radiator but this is unsatisfactory. Four example, if I want to go out for the day and leave the heating on low, I have to go around the house and turn down the TRV on every radiator (12 in total). When I get back I have to go around and turn them all up again. Also, even when the house is nice and warm the boiler is continually clicking on and off as it checks the temperature of the water in the system. This also seems very inefficient.
I'd like to install a room thermostat and as there is no existing wiring I am thinking about a wireless one. Ideally I'd like have the ability to be able to set the temperature to vary during the day, e.g. 12 degrees overnight when it's really cold, ramping up to 20 degrees just before I get up. My heating engineer cannot seem to find one that will do this. Most seem to be a replacement for the programmer unit and most only seem to work with a combi boiler.
Does anyone have any suggestions for a thermostat/ programmer combination that would do what I want it to? Given my lack of experience with all things electrical, I'm probably going to leave the thermostat to a professional. The heating engineer has quoted me £360 including VAT to fit a new programmer and a wireless but non programmable thermostat. Is this a good price? It sounds a bit pricey given the cost of the parts.
