rads not heating fully

imcc

Hi have a 30 kw boru stove and it's not heating the 14 rads only Luke warm and sum rads not warm at all any ideas on what to do thanks

myshirt

Balance them. Bleed them. Had the exact same issue myself recently.

imcc

myshirt wrote:

Balance them. Bleed them. Had the exact same issue myself recently.

Ye I bleeded them and still the same I thought a stove that big shud be well able to heat them all

John T Carroll

imcc wrote: »

Hi have a 30 kw boru stove and it's not heating the 14 rads only Luke warm and sum rads not warm at all any ideas on what to do thanks

What type of solid fuel are you using and how much are you burning say per day.

imcc

John T Carroll wrote:

What type of solid fuel are you using and how much are you burning say per day.

Burning turf a nice bit a day

John T Carroll

imcc wrote: »

Burning turf a nice bit a day

If you want to carry out a realistic test go and get a bucket or some form of container and weigh it on your bathroom scales then fill it up and weigh it again, subtract the two weights and you have the net weight of the turf.
Burn that away at your normal rate, repeat it a few times and you will get a fair idea of what your real consumption is. This will then give you a fair idea of where the problem is, otherwise, in my opinion, you will be whistling in the wind trying to figure it out.

Turf has a very low heating value relative to coal, coal has a heating value of about around 7.9 Kwh/kg and turf is hard to determine depending on the moisture content but assume it around 4 Kwh/Kg. If the stove is to supply 30 Kw ( 25Kw to water & 5 kw to room) then it would need to consume 10 kgs of turf per hour or 22 lbs/hr. at a boiler efficiency of 75%.
Realistically the stove will probably be outputing around 12 kw/hr so you would need to fire at around 4 to 5 kgs of turf/hr. minimum.

Paulownia

I'd try a few dry logs and see if it improves the situation, if it does you know it is the turf

imcc

John T Carroll wrote:

Turf has a very low heating value relative to coal, coal has a heating value of about around 7.9 Kwh/kg and turf is hard to determine depending on the moisture content but assume it around 4 Kwh/Kg. If the stove is to supply 30 Kw ( 25Kw to water & 5 kw to room) then it would need to consume 10 kgs of turf per hour or 22 lbs/hr. at a boiler efficiency of 75%. Realistically the stove will probably be outputing around 12 kw/hr so you would need to fire at around 4 to 5 kgs of turf/hr. minimum.

Ok thank was just wondering the neighbour has the same stove and same amount of rads and there rads are hot the whole time and there just burning turf

Dtp1979

imcc wrote: »

Ok thank was just wondering the neighbour has the same stove and same amount of rads and there rads are hot the whole time and there just burning turf

Was it installed by the same plumber? Could be a piping issue

John T Carroll

imcc wrote: »

Ok thank was just wondering the neighbour has the same stove and same amount of rads and there rads are hot the whole time and there just burning turf

Slightly off this exact topic but turf is turf.....

Well over 50 years we used turf cut (not washed up on) and dried from this beach in a cast iron Stanley No7? (dry) stove.
It was also the only form of heating in the house but to get the oven hot enough a bucket of coal was always added when baking.

http://www.southernstar.ie/News/Turf-deposits-on-White-Strand-Old-Head-13012014.htm

imcc

Dtp1979 wrote:

Was it installed by the same plumber? Could be a piping issue

No different plumber

John T Carroll

imcc wrote: »

No different plumber

When the stove is up to "normal" temperature you could also monitor the run time of the circulating pump once the pipes stat calls for it to run, a very short running time would indicate that the stove, for whatever reason, isn't delivering its expected output.

Dtp1979

When the stove is up and running after an hour or so, go to your oil boiler and feel the top Pipe. Is it warm?

imcc

John T Carroll wrote:

When the stove is up to "normal" temperature you could also monitor the run time of the circulating pump once the pipes stat calls for it to run, a very short running time would indicate that the stove, for whatever reason, isn't delivering its expected output.

Sum times it doesn't run for long and other times it cud run fir a while and then it cud take hours before the pump wud start to run

imcc

Dtp1979 wrote:

When the stove is up and running after an hour or so, go to your oil boiler and feel the top Pipe. Is it warm?

Just after lighting the stove shud it be warm

John T Carroll

imcc wrote: »

Sum times it doesn't run for long and other times it cud run fir a while and then it cud take hours before the pump wud start to run

Have you got a Bungalow or a Two Storey Dwelling?.

Dtp1979

imcc wrote: »

Just after lighting the stove shud it be warm

If only your stove is operating, then the pipes at the oil boiler should never heat. Do they?

imcc

John T Carroll wrote:

Have you got a Bungalow or a Two Storey Dwelling?.

Bungalow

imcc

Dtp1979 wrote:

If only your stove is operating, then the pipes at the oil boiler should never heat. Do they?

No there not warm

John T Carroll

imcc wrote: »

Sum times it doesn't run for long and other times it cud run fir a while and then it cud take hours before the pump wud start to run

imcc wrote: »

Bungalow

As its a Bungalow then the water will only be circulating through the cylinder coil until the circ pump starts, if its sometimes taking hours before the pump cuts in then there is something very wrong somewhere I would think, you would expect the pump to cut in in 30 minutes or so under those circumstances. I think you should get a good plumber (maybe your neighbours) in to have a look at the installation etc and give his opinion.

imcc

John T Carroll wrote:

As its a Bungalow then the water will only be circulating through the cylinder coil until the circ pump starts, if its sometimes taking hours before the pump cuts in then there is something very wrong somewhere I would think, you would expect the pump to cut in in 30 minutes or so under those circumstances. I think you should get a good plumber (maybe your neighbours) in to have a look at the installation etc and give his opinion.

Ye will have to get one in to have a look at it thanks for your help really appreciate it