potterton puma 80e not heating up rads

[caine]

can anyone help i have a puma 80e combi. the hot water is running fine but i have no hot water going to the rads the boiler fires up fine when i flip the switch to constant or timed but i get no flow to the rads i think it sounds like the pump but i wouldn't know where to find it any one got any ideas!!!

 

[baxpoti]

the pump but i wouldn't know where to find it

!!!!!!!!

In that case get someone in who would know where to find it, they might also know where the diverter is!

 

[petit_pablo]

If the hot water is ok then the pump is circulating round the boiler. Is the heat actually leaving the boiler on the flow pipe at all?

 

[twgas]

make sure you have no dripping taps or water leaks on the hot water supplies. to test try turning off the incoming main and see if the heating then works

 

[baxpoti]

If the hot water is ok then the pump is circulating round the boiler.

Are you sure......


This is a Puma,

Hot water will work ok with a dead pump.

 

[caine]

the boiler fires up perfectly where is this diverter. The presure gauge is fine and there are no dripping taps. my field is electronics and IT ive already had to fix the pcb. cheap as chips pcbs

 

[baxpoti]

where is this diverter.

Brass cylinder on the left of the pump with lots of pipes.

 

[JerryM]

there is a lot already in the forum to search at which are worth reading.

best to get a manual from parts arena (the link i use is www.partsarena.com/baxi/System/index.htm)

dripping from the dhw (mainly taps) is clear fav.

my 1st thought was the pump. i drained the system a bit and took the pump off by removing the 2 off allen screws and run it (the forum suggests holding a screw driver against the pump) to be sure the impeller was running.

next thought was the diverter (from the manual fault tree). not easy to get it off (the back nut needs the frame bending to get access - a tip from the forum). i took the wax end off and tested to see if the plunger operated in boiling water which it did. then reassembly to check the diverter works having put the wax capsule end back in water - chk operation by blowing into the outlet end. so my diverter is ok

not sure what to check next - thoughts are DHW flow switch, the red isolating valve and the internal pipework now i've got the diverter off.

will keep you posted

 

[JerryM]

tried internal and field pipework today by using plastic pipe (sealing it in the boiler pipes with my hand) and blowing into the plastic. both showed no blockages.

So decided to refill and re test boiler. this time i did get hot water through the ch flow pipe but noticed that return pipe close to the boiler got very hot. there was a distinct cycle: boiler lit, return pipe heats up, diverter opens just as boiler trips on overheat, return pipe goes cold and flow pipe gets hot, diverter closes.

decided to take wax capsule assy part of the diverter off again and removed the wax capsule from inside by using a socket on the nut in the face of the assembly. cleaned it all up. tested the capsule itself in hot water and again seemed to operate ok. retested boiler again with better but same results.

 

[JerryM]

followed their instruction detailed in the post "Potterton Puma ” and i am back up and running on CH all ok.

 

[Vic Spanner]

Is it Puma wax capsule day on here today.

 

[bengasman]

Maybe it is time for a wiki or FAX that says; if you got a puma, check the valve and the diverter before posting here

 

[Agile]

If the hot water is ok then the pump is circulating round the boiler.

I dont think that you can be familliar with how this boiler operates.

Tony

 

[Agile]

Can anyone tell me what each of the two pots on the PCB are to set?

Tony

 

[ChrisR]

Can anyone tell me what each of the two pots on the PCB are to set?

You're teasing, aren't you.