Does it sound like air to you?? I'm at a loss

[Riley]

Evening chaps replaced a three port and a cylinder for a customer today. Now nothing getting warm. I've tried everything any thought?

 

[ShaunCorbs]

yea or flow blocked

 

[Masood]

When you say you've tried everything - how far is the heat travelling up the pipe? Assuming boiler is firing, pump is running, is the pipe up to the 3-port getting hot. And then? Either branch warming up?

 

[gasmanrob]

turn the pump upside down and run it for a few minutes that normally shifts any air..

what was the water quality like on the drain down? the new 3 port would suggest crud in the system, possibly a lump of it dried out on the drain down?

did it fully re fill you havent got a blocked cold feed? sound silly but its often the basics we over look?

 

[Millsy 82]

Wet vac over the vent pipe.

 

[REDSAW]

turn water back on!!

 

[mfgs]

Any air vents on the cylinder flow or return? Have you tried cracking the nuts on the cylinder to vent any air?

 

[mutley racers]

Any air vents on the cylinder flow or return? Have you tried cracking the nuts on the cylinder to vent any air?

I hate it when this is what needs to be done. All seized and it ends up moving the flange on the coil and that
Starts to leak. Although it's a new install.

Coincidentally, what do people do to fix the problem I mentioned above

 

[ShaunCorbs]

I hate it when this is what needs to be done. All seized and it ends up moving the flange on the coil and that
Starts to leak. Although it's a new install.

Coincidentally, what do people do to fix the problem I mentioned above

dont do it in the first place but if you have to if you cant tighten no more time to re make then joint

 

[Riley]

Thanks all for your answers

Sorry I was driving and have only just picked them up.

Right to summarise
Pump is brand-new and is working
Three port was changed owing to constant leak from spindle which also fried the motor
Cylinder was changed due to a split coil.
I did all the work by bunging the tanks in the loft as the system is microbore so wanted to avoid draining down.
Flow gets lovely and warm from the boiler through the pump and through both branches to central heating and to cylinder
Return at boiler gets just warm at best return through cylinder barely even gets warm. If I take the head of the three Port valve it and leave it open to both heating and water and then the radiators to get warm
Would We assume air in the coil

 

[Riley]

Thanks all for your answers

Sorry I was driving and have only just picked them up.

Right to summarise
Pump is brand-new and is working
Three port was changed owing to constant leak from spindle which also fried the motor
Cylinder was changed due to a split coil.
I did all the work by bunging the tanks in the loft as the system is microbore so wanted to avoid draining down.
Flow gets lovely and warm from the boiler through the pump and through both branches to central heating and to cylinder
Return at boiler gets just warm at best return through cylinder barely even gets warm. If I take the head of the three Port valve it and leave it open to both heating and water and then the radiators to get warm
Would We assume air in the coil

 

[plumben]

either theirs a big load of air in the system,
the micro bores blocked or some other pipework somewhere,
that would be what i would look at first in that order

as for the cylinder, i never crack the nuts, if theres an air vent ill use that
if not ill put one in

 

[Riley]

Well as I said with the motor off the three port all rads get hot so not blocked microbore.
Must be the coil

 

[Masood]

Well as I said with the motor off the three port all rads get hot so not blocked microbore.
Must be the coil

Crack a union on the coil and get the vac on it..

 

[gastec]

The 3 port is the wrong way round.

 

[Riley]

The 3 port is the wrong way round.

I did think that mate but doublechecked that last night and it's not

 

[smtplumbing]

Could a bit of lagging get in the cylinder

 

[Riley]

Could a bit of lagging get in the cylinder

I suppose it's possible mate. I was very careful with it Water heated by the immersion is working fine. Seems to be the coil that is the problem though

 

[stevetheplumber]

logic tells me if it all works with the head removed from the valve its the valve or wiring

 

[Riley]

Sorted. Giant airlock in coil. Thanks all for your help