y plan

So went to a job today, replaced an old Randall 130 mechanical timer with a Honeywell st9400c on a y-plan system. Water channel fine. Heating channel was fine in that it sent a signal (if the room stat was calling) to the 3 port, but nothing on SL. Figured a faulty head. Replaced the head and...

hi everyone I’ve noticed a small issue with my heating and it’s bugging me because I can’t put my finger on what’s causing the radiators to randomly come on when our Nest therm is off. I don’t think the Nest is at fault because the heat link is not showing “Heat on” lights when the boiler...

hi everyone, I’ve just changed my circulation pump and I only noticed before re-fitting that the diverting valve was set on HW. So I must’ve drained the HW side to just below pump level? Then I refilled and turned it on. Is there any way I must bleed it now as it’s the HW side? Sorry if...

Ok, I'm I'm sure i have asked before but I need to check for peace of mind. Next week I'm putting a combi in, y plan at present. No loft as been converted to a bedroom and tanks are in a cupboard in this room. I have done a few y plan to combis but need to double check. Boiler is going in...

hi all, just a cauriosity question , why is it on y plans the feed and vent close coupled section blocks ! just a friend has blockage cleared in this area and asked question. Cheers Howy.

Hi all. I have a problem with the rads heating up when there is call for hot water only on a small 5 radiator y plan system with regular boiler, grundfos alpha 2l pump , nest 3rd gen stat and drayton 3 port. When the thermostat calls for heat the valve switches over, boiler fires and pump runs...

Good morning! I have a problem with my central heating system…..and am wondering if anyone can help. The system: 1. 15 year old detached house, with a 15 yr old Honeywell Y Plan CH system, which to all extents and purposes works FINE. 2. Boiler is a traditional ‘IDEAL Classic’ boiler...

Evening all. Fitted the the boiler on Friday, Commissioned it using test mode, handed over to sparks for wiring up the controller, Mid position valve, Room stat and cylinder stat. They couldnt figure it out, GW (Vaillant) Tech support don't work at weekends despite the fact that they claim...

Hi, I visited a job where the customer had no control over heating and hot water, they were told by BG that things were missing and it was all wrong so nothing could be done, what a joke. I was expecting to find no valves, stats etc but when I arrived I was surprised to find a fully wired Y...

I've got a little install test for helplink tomorrow and I've been told I'll be given s & y plan diagrams and be told to fill in the blanks. I know the very basics about s & y plan but to be honest the most I've done on them is change a 2 port or rip the system out!! Any pointers on what I...

I have a Y Plan Set up on my 438 Eco tec Heat Only Boiler This is just a general question I Run my heating ( Rads ) all day as there are people at home throughout the day But I also have the hot water on to ensure there is always hot water if needed My Question Could i run the Hot water...

If a y plan system shuts down when the last function was central heating power remains on to the motorised valve and maintains the motor in a stalled condition. This means that It can remain in this state overnight . Has anyone found a solution to this situation?

I supposes you would call it a y plan. Changed the heating pump on it last night as it has been pumping over so bad with cold feed on flow and vent on return it had killed it. Going to change the cf and vent positions on Saturday. But instead of a mid position valve it has a second pump on the...

Hi everyone, i have just bought a house which has a y plan central heating system with an oil fired conventional boiler. The house was prob built in the 60's, I'm not sure how old the system is but my guess is it's been in a while. The boiler is Wallstar 12/14. The radiators take a while to...

Hello guys I am having problems with a Y Plan Heating system that has been a long running issue. The boiler and pump is on all the time even with the programmer turned off. The actuator & programmer have been renewed and its made no difference but I did notice when I was doing the electrical...

On the job today (see previous thread about Y plan pipe configuration with pics). I stuck a hose on the drain valve down stairs, stopcock turned off and proceeded to drain the system. All was going fine, upstairs bleed valves opened and water draining fine. When it came to downstairs for...

Hi guys got to this job today, took out potterton flamingo. I need help with heating pipes need connecting in the airing cupboard. The drops coming from...

Hello guys here's a problem I am having and would appreciate any helpful advice thankyou. i have a Honeywell Y plan heating system with three port zone valve and the heating and hot water stays on when the programmer is turned off. i have renewed the programmer and the problem is still...

Im quoting to replace a boiler (oil) and its currently got a twin head pump arrangement which seems to work ok. Shall I leave as is, or should I replace with Y plan (or even S plan I guess..).

Hello All, I have an interesting question to ask regarding mysterious air entering into a Y plan system gravity fed with f&e tank and a cwsc Ideal floor standing heat only boiler over 20 years old Honeywell mid position valve Hot water cylinder. Air is entering into the system so...