Pipework for Vaillant 418 Ecotec

[bluegladwell]

Hi
Can someone try to help me with a new boiler installation problem please.

An old Potterton MF boiler has been replaced with a Vaillant ecotec 418 - System is open vent. New boiler installed -fires up then shuts down within 20 seconds. It has been installed by a gas safe registered friend without experience of this particular product. So having spoke with the tech support guys at Vaillant they say there is a 'pipework problem' given the symptoms we gave. Suggested the obvious -flow and return reversed but this has been checked and is ok , however when told that the old boiler had a return and flow and pumped return connection and that we had teed the return pumped return to the boiler he said -definitely a pipe problem not a boiler problem. I think he maybe correct but not sure where to start..thanks for any help in advance

 

[Dan Robinson]

You mean you had gravity hot water and pump heating before?

The Potterton Kingfisher MF had three connection on the back.

Post pictures of the installation.

Has a new 6m head pump been fitted? Or one of those daft energy efficient ones?

 

[bluegladwell]

You mean you had gravity hot water and pump heating before?

The Potterton Kingfisher MF had three connection on the back.

Post pictures of the installation.

Has a new 6m head pump been fitted? Or one of those daft energy efficient ones?

Yes Dan, that is correct -gravity hot water and pump heating before. No new pump fitted -existing Grundfos (2 months old) only pump on system. T

Photos to follow shortly

 

[bluegladwell]

Hi Dan

album created with two images - no idea how I get them to this posting.

first hurdle failed..Terry

 

[scoobydo123]

Surely he cannot pipe it up wrong it is simple. What status display do you get when it shuts down? You sure the gate valves are opened up on the pump. How many MV (motorised valves have you got). Maybe these are wired incorrectly. Has the bleed and purge program been run?

Come to think of it I would be getting a real person in to install as it is a basic system to install, only prerequisite is a very clean system that makes it any different to anything else unless you start getting the micro-firing issue. Not sure if the latest 4xx come with the revised PCB's

 

[Dan Robinson]

Indeed - you can't really mess up a job like that.... well so I thought.

OP - you need to make you Album/Profile publically viewable.

 

[bluegladwell]

Surely he cannot pipe it up wrong it is simple. What status display do you get when it shuts down? You sure the gate valves are opened up on the pump. How many MV (motorised valves have you got). Maybe these are wired incorrectly. Has the bleed and purge program been run?

Come to think of it I would be getting a real person in to install as it is a basic system to install, only prerequisite is a very clean system that makes it any different to anything else unless you start getting the micro-firing issue. Not sure if the latest 4xx come with the revised PCB's

there is a F22 code - , all gates valves checked open, one 3 port valve -y plan - wired as per Valliant specs -pump direct to PCB- S/L to term 4 with link removed. Bled, System was power flushed last week, Magna Clean fitted. Valliant guys say the fact that is stays fired for such a short period (15-20secs) strongly indicates a pipework issue.

 

[Dan Robinson]

What pump is it and are you sure the service valves are all open?

 

[bluegladwell]

What pump is it and are you sure the service valves are all open?

Dan

Grundfos Pump 15/60 is fitted fairly new, started it on low speed and increased to second & third - still no success. all valves are opened checked numerous times as I begin to doubt everything too -, Photos should be viewable, not much to see though - Terry

 

[Dan Robinson]

Can almost guarantee that pipe work is air locked to buggery. hasn't the installer ever heard of air vents?

 

[bluegladwell]

Can almost guarantee that pipe work is air locked to buggery. hasn't the installer ever heard of air vents?

Thanks Dan - I have been promised all will be resolved tomorrow now that your message has been relayed (into Russian).

 

[Dan Robinson]

I would be very worried that it took a forum to correct faults. Hope he is GSR.

 

[Paul8662]

Hi ya can you tell me what pipe on the top of the boiler gat

 

[Paul8662]

Can you tell me what pipe gets hot first left or right

 

[bluegladwell]

Can you tell me what pipe gets hot first left or right

The right one.. ( for about two meters) The left one stays cold