Recent content by TG2015

New Drayton controller arrived today. Took off old one and dropped in the new one. And......it works like a dream ! Brilliant result. Very happy! :D

Yes ;) Since I could hear relays switching with both the timer and manual override, and I wasn't prepared to poke around a inside, I phoned Drayton. Yes, I will. That's what I said in my last post. ;) And, once again, many thanks for your help. Without it I would not have been able to hold...

Looked at wiring, all clean, no shorting strands. I phoned Drayton, and spoke to a very helpful man there at the Technical department, Martin. We did some testing over the phone and concluded that the LP522 has a faulty HW relay. The controller works fine except in the sequence when the CH is...

We first noticed the problem when the timer switched to add HW whilst the CH was running. The timer lights were correct (both HW and CH illuminated), but the HW remained cold. During all the testing, we've been pressing the buttons to illuminate the display for HW & CH. Thanks for the tips...

Yep, fully aware that the lever on the side is not relevant to this. I had removed the cover and was observing the internal mechanism. I must admit to having a sneaking admiration for the design of the valve now that I understand it better. Its a very clever but simple piece of engineering...

Done some more testing! There are two wires that are connected to the 3-way valve Grey wire; one is from the Cylinder Stat, and the other (I presume) is from my LP 522 Drayton Programmer (in a different room, with cables chased into the wall) On the positive side, I now know that the Honeywell...

Yes the boiler continues to run when HW is called, its just that the valve doesn't move. So, in this instance, the external controller shows green lights on for both HW and CH, the boiler continues to run, but the valve remains in the CH only position. Switching off CH, the valve returns to HW...

Thanks. Yes, was aware to test the spring return with no power. Answer to your questions: The boiler does not stop and start when running CH and HW called. The valve simply stays in CH position. If the CH is turned off, valve returns to HW only. Have also checked voltages at grey and white...

Appreciate the replies, thanks. Yes, I removed the head to check the spindle moved freely, it does. Reassembled it, and then moved the lever from auto the manual. It was exactly as expected and as you described. The valve works perfectly except when set to CH and then HW is activated by the...

I made sure that the cylinder thermostat was set high, so that the valve would be expected to move.

Thanks, I'd already removed the head to inspect it, so it wouldn't be too much of a challenge to swap it. It was just that I didn't want to pay out for a new head, before being sure that's where the problem really was. Inspecting the wiring diagram for the Honeywell valve, I'm struggling to...

Hi all, I'm hoping that someone might be able to help me with a problem I'm experiencing with my central heating/hot water system. The valve is Honeywell V4073A three way. Mostly the system works fine, except for one condition. The symptom is that when the CH is operating, and then HW is...