is my pump speed set too high

[jasonnic]

Hi I'm having problems with two of my radiators not heating up, even when I turn off all the other rads in the house. After reading some of the other topics I checked the pump speed and it is set to 3 could this be causing the problems with these two rads????

cheers

J

 

[seco services]

have you trv's on the rads ?

 

[jasonnic]

hi

yeah, but have removed them so there completely opened. I've also checked that the pins are up as I saw some posting that they sometimes get stuck

J

 

[seco services]

are both rads on the same pipework or in the same part of the house ?

 

[kevplumb]

whats the system

 

[jasonnic]

hi

I have a sealed system, with 4 rads down stairs and 7 upstairs all with thermostats on the radiators. A ideal icos boiler and a grundfos ups 15-60 pump

jason

 

[jasonnic]

hi seco

the two problem rads are both downstairs and very close to each other ie ones one side of the wall and ones the other

jason

 

[jasonnic]

Oh I also have trying to balance all the rads as by closing the locksheild valves to there kinda minium 1/4 tun for most of them

jason

 

[seco services]

so probably off the same flow/return pipes.

probably an airlock or blocked pipe.

 

[kevplumb]

pump on 3 and all other rads off

methinks seco has a point blockage

 

[jasonnic]

do I shut all the others off and open the others up fully thomostat and locksheild????

and if it is a blockage do I need the system flushing to resolve it?

jason

 

[kevplumb]

do I shut all the others off and open the others up fully thomostat and locksheild????

worth a try

and if it is a blockage do I need the system flushing to resolve it?

if it is a blockage flushing won't do jack fella

 

[seco services]

you say you tried shutting all the other rads and still didn't get hot.
has the system got a bypass valve after the pump ? did you shut that aswell ?

 

[jasonnic]

i'm just shutting off all the others and opening up the two problem rads fully on the inlet and out let.

I'll check for a bypass after the pump but I am now getting into areas that don't know what I'm looking for. I know one thing there are more piple in the airing cupboard than I can shake a stick at

 

[seco services]

I know one thing there are more piple in the airing cupboard than I can shake a stick at

shouldn't be any piple in the airing cupboard