Search results

See below about using the VRT350 with ecotec plus boiler To tech support:- I have an Ecotec plus 428 boiler that was installed around 2 years ago. It is currently running using Honeywell controls (AQ6000). As the AQ6000 is obsolete and starting to play up I would like to change to Vaillant...

Scooby - The hot water is controlled by the aq6000 so it has priority and it is on morning, lunchtime and all evening. The set temp is 55c and we have never ever run out of hot water even with 2 teenagers and a power shower lol. As you say, I may not have noticed if it is cycling, but it does...

Heating has just gone off now as we have reached the room stat temp and that hasnt happened in a while! From memory the d40 was hovering around 74 and the d41 was around 66. I also checked the d36 flow? and that showed 0. I assume flow isn't measured on this boiler?

It now seems to do a number of short cycles - off for 1 minute then on for a number of seconds starting at about 20 and increasing each cycle until the water circulating temp gets down to about 55c during the off time and then I get a more extended burn of maybe 10 minutes or more. When it is on...

I've checked the sizing of the living room rad and it is just under 10,000 btu which is exactly what the online calculators suggest. I have never noticed any problem with the hot water, it always seems to be up to temp within 20 minutes or so in the morning and I think it's a 40gallon tank...

Hi, I left the settings as you suggested all day (d0 = 15, d1 = 12, d2 = 60 and water temp 68c) and the living room never got up to temperature all day, stopped at 19.5 with an outside temp of 1c. I've now put the water temp up to 75c and the temp is now a more respectable 21c and still rising...

Just saw your 2nd note and not sure what it means. The AQ6000 has an external temp sensor and a flow and return sensor as well as the tank sensor. The control unit is set for hot water priority and the anti cycling control in it is set fully anticlockwise about 8 times per hour I think but not...

Hi, The pump is a Grundfos super selectric 15-60 and is set on the max setting (3). I have set all the figures as you have suggested and will see how it goes. Thanks again, your help is appreaciated.

Scooby - as you say now trv's have closed the boiler is coming on for about 15-20 seconds and then shuts down in anticycling mode. It then waits for another 3 mins. The result is that the living room which has the thermostat in and has no trv is starting to cool down again despite the thermostat...

I dont think there is any problem with insulation or radiator output. The house gets up to 20c + even if its -10 outside without any problem. The problem only comes when the whole house is nice and warm and the heating seems to go to sleep for 30 mins or so. This is long enough in this weather...

Scooby - I normally have the boiler temp flat out at 75c but I have now reduced it to 70c and at the moment it seems to be working OK although it's taken longer than usual for the house to get up to temp as expected. Agile - will try lowering the boiler output tomorrow and try again. Both...

I did try setting the CH water temp to 60 and increased to 65 when the boiler shut off and when the boiler refired it only went for about 20 seconds before it shut off again. Found out how to read the values now :) The D0 value is 30. Should I turn this down? The CH water temp is set to...

Just did this. Turned CH temp to 65. When it reached 65 it turned off and the radiator symbol started flashing I then turned it up to 70 and after a few minutes it fired up again went to 65 then it seemed to increas the output even more and went to 70 and turned off after a total of 1 minute 15...

As I'm not a plumber is all I know is that the plumber who fitted the original boiler was a well respected plumber in the area and he sized the original boiler. The plumber who fitted the replacement was recommended to me and he agreed that the size was correct. I have no idea what D0 is or how...

Agile - I did answer - I said it's a 4 bed detached house and it has been sized correctly. The plumber who fitted the replacement boiler confirmed that it was the correct size. Scooby - I will try the test you mention and let you know what happens.

OK thanks, back to the original question then. I'll change the controls to Vaillant. I thought of using the VRT350 but I'm told that this needs the VR66 wiring centre which is not available yet. Is there any alternative to the VR66? If not, what controls would you suggest?

Agile - You got me thinking about how it's supposed to work. I believe it learns how long it takes to get up to temperature given the difference between the outside, inside and requested temps and puts the heating when it believes it will be able to get up to temperature by the requested...

As DP says it is indeed a weather compensator and the system is sized for the house. It's a 4 bed detached. This has only started happening since the attic had extra cladding fitted, which may be a coincidence or maybe the house was not getting up to temp before in the cold weather! When the...

I had an ecotec plus 428 boiler fitted in early 2011 and at the time kept my AQ6000 weather compensating controls. The AQ6000 unit is in the living room.The problem I now have is that when the whole house is up to temperature the heating goes off as it should but doesn't come back on until the...

Hi, Would you still have the pdf for the AQ6000 that you could send me at [email protected]? Thanks, Dave.