Semi gravity open vented heating system this system has no zone valves.

[Inverness]

Im replacing boiler for like to like but with a bypass valve and two motorised valves. Since the new boiler has a flow and return unlike the old boiler that had four tappings. Could I tee the vent Pipe into the cold feed pipe?
where the vent pipe is ATM is before the flow goes into the coil to cylinder. So if I have the heating on only the vent pipe won't be in use. Any suggestions.

 

[lame plumber]

go and have a good read of your text books, youll need to ensure your neutral point is set up correctly for the pump so overspill doesnt occur. Why havent you considered using a systm boiler and pressurising the system, it will work better on the heating circuit side.

 

[Leo21]

Down load some manufacturers instructions, the location of the pump, cold feed and vent are very important.

 

[ShaunCorbs]

why not upgrade it to a fully pumped system

 

[Leo21]

why not upgrade it to a fully pumped system

I think it is fully pumped, I think the gravity he's referring to is the f and e tank.
They don't make boilers suitable for Gravity now anyway.

 

[ShaunCorbs]

I think it is fully pumped, I think the gravity he's referring to is the f and e tank.
They don't make boilers suitable for Gravity now anyway.

with it having no zone valves think hot water is on gravity (esp when hes asking about 4 port boilers)

 

[Leo21]

with it having no zone valves think hot water is on gravity (esp when hes asking about 4 port boilers)

My mistake, Ive just re read it. Sounds like a disaster waiting to happen.

 

[ShaunCorbs]

My mistake, Ive just re read it. Sounds like a disaster waiting to happen.

also time for new cylinder me thinks

 

[lame plumber]

Im replacing boiler for like to like but with a bypass valve and two motorised valves. Since the new boiler has a flow and return unlike the old boiler that had four tappings. Could I tee the vent Pipe into the cold feed pipe?
where the vent pipe is ATM is before the flow goes into the coil to cylinder. So if I have the heating on only the vent pipe won't be in use. Any suggestions.

In an earlier post you said you are training to be gas safe, why are you doing this job?

 

[Inverness]

I'm doing my svq3 plumbing and heating and I'm in my 2nd year. The customer is only wanting a replacement boiler only and 14 trvs on all rads. It's an old farm house about 25 years old central heating pipes. I wouldn't want to take the chance to pressurise this system. The pump is replacing the same position as the old one.

 

[Inverness]

I would love to install a new cylinder but it's the customers money.

 

[ShaunCorbs]

I'm doing my svq3 plumbing and heating and I'm in my 2nd year. The customer is only wanting a replacement boiler only and 14 trvs on all rads. It's an old farm house about 25 years old central heating pipes. I wouldn't want to take the chance to pressurise this system. The pump is replacing the same position as the old one.

You still need to bring it up to building regs and best place for your port valves would be by the cylinder and not the boiler

 

[Inverness]

I have installed a cylinder stat and one zone valve for the hot water and a zone valve for the central heating. Also a bypass valve. And a room stat. Any other suggestions?

 

[ShaunCorbs]

I have installed a cylinder stat and one zone valve for the hot water and a zone valve for the central heating. Also a bypass valve. And a room stat. Any other suggestions?

You checked one rad isn't run off the hot water side ?

 

[Rickster123]

So before this thread gets closed, you're gas safe registered??