Ideal Type E cutting out

[Viper Gas]

Hello ALL,

got one of those bullet proof Ideal Type E 80N conventinally flued Boiler that has started to act up. IE no HOT WATER
boiler started cutting out quicly after switch on (set on HW only demand and then with Heating & hw demand too).
system seems to be fully pumped.
investigated and found
1- pilot light is on.
2- set boiler stat to mark 1 and boiler fire up then burner shuts down several minutes later
3-then moved boiler stat to 3 and burner fires up again for a coupe of minutes
4- then moved boier stat to max and burner fire up for couple of mintues and then burner cuts out
5- checled F&E has water in it
6- checked pump with screw drvier and seems to be strong
7- checked pipes near HW cylinder i loft and found flow and return to be piping hot
8- checked hw thermostate by feeling that pipe was hot on each side of the rad type valve fittied inline in flow next to HW cylinder
9- after some time, 10 min boiler, fires up again when water in pipe drops temperature

its a funny fault because everything ive done indicates nothign obviously wrong...can any one here help please.

thansk very much for you help in adanvce

D368

 

[SimonG]

Has all the sounds of a circulation issue.

 

[Simon F]

:iagree:
is it s plan, y plan?
is the pump working ie radiators working?
have you tried manually opening the motorised valve?
is there a flow restriction gate valve that has been closed or become crusted up?

 

[Viper Gas]

-yes i found that the rads are heatin up
-yes i checked hw cylinder stat that operates a rad type valve on flow of the hw cylinder coil. was hot on both side telling me water was circulating
-this is not a y plan, there are no multiport valves on the system,
-when hw is on rads will heat up unless rad vavles are shut off.

thanks guys

 

[mountainman]

Sounds like the F&E tank is empty to me :thinking:

 

[Viper Gas]

f & e has water in it and there is water in pipes, flow and return hot allthe way up to loft.

 

[darren bastin]

Does the rad typ style valve have a head like a trv ? Pin stuck ?

 

[diamondgas]

-yes i found that the rads are heatin up
-yes i checked hw cylinder stat that operates a rad type valve on flow of the hw cylinder coil. was hot on both side telling me water was circulating
-this is not a y plan, there are no multiport valves on the system,
-when hw is on rads will heat up unless rad vavles are shut off.

thanks guys

How hot was the return from the cylinder? forget how hot the pipe is either side of the valve, that just tells you its managing to get through it! Is the custards complaint that the water isn't getting hot enough? You got to check the diff between f&r at cylinder.... as said it sounds like a circulation issue. whether that's down to the valve in question or a blockage elsewhere is down to you to find out

 

[Viper Gas]

hello all,

thanks very much for all your input, im am of the same opinion that it is some sort of circulation issue. hence i gave the system a does and asked customer to open one rad each day. i will retrun and drain system and refuill with fresh h2o and inhibitor.....
fingers crossed it will work oterhwise ill get the power flusher out

dd368