Glowworm 100ff confirm my ideas please

[Rob Foster]

Glowworm 100ff wall hung 30kw conventional boiler. Set up in garage with correct 28mm runs to rest of system. All worked well over the years odd new bits and bobs. Recently serviced It goes through start up sequence fine style.
Call on from timer in house, fan starts, pump on, starts ignition sequence spark ignites pilot gas - pilot established and bingo ...............28mm out starts to heat up but after about 10 mins ------------------------- shut down. Cool down and will do it all again. All rads (12 rads) are open and 3 way for cylinder is always open. Rads start to heat up. So whats the problem ? I think maybe pump is lala despite being new 3 years ago and runs smoothly. No airlocks centralheating water out of bleeds on all 3 levels of the gaff. The only control for heat is on the boiler and set at 3/4 full heat. Any ideas. It does not get to modulation in 10 mins - house is too big
Thanks in anticipation

 

[Harvest Fields]

Start by making sure the pump is spinning mate. Take the centre out and see if you can stop it with a screw driver.

 

[Last Plumber]

Glowworm 100ff wall hung 30kw conventional boiler. Set up in garage with correct 28mm runs to rest of system. All worked well over the years odd new bits and bobs. Recently serviced It goes through start up sequence fine style.
Call on from timer in house, fan starts, pump on, starts ignition sequence spark ignites pilot gas - pilot established and bingo ....28mm out starts to heat up but after about 10 mins ------------------------- shut down. Cool down and will do it all again. All rads (12 rads) are open and 3 way for cylinder is always open. Rads start to heat up. So whats the problem ? I think maybe pump is lala despite being new 3 years ago and runs smoothly. No airlocks centralheating water out of bleeds on all 3 levels of the gaff. The only control for heat is on the boiler and set at 3/4 full heat. Any ideas. It does not get to modulation in 10 mins - house is too big
Thanks in anticipation

What are the flow and return temperatures over the ten minute period?

 

[Rob Foster]

What are the flow and return temperatures over the ten minute period?

gt no accurate temps but I can touch the rtn for ever but the flow gets hot quicktime. Thank you for responding

 

[Sharp Point]

What make n model of pump is it rob?

 

[Rob Foster]

What make n model of pump is it rob?

Grunfos selectric set on speed 2 which I am pretty sure was brand new when fitted not one from out of one of the vans !

 

[Harvest Fields]

Grunfos selectric set on speed 2 which I am pretty sure was brand new when fitted not one from out of one of the vans !

Could be 6 months old, but if you system water is c**p it makes no difference

 

[Rob Foster]

Could be 6 months old, but if you system water is c**p it makes no difference

I have had the best magnet cleaner installed for the last 6 years - it was designed by me and produced by Eclipse Magnetics in Sheffield.

 

[Rob Foster]

some of the pre production units still in my workshop like the one installed on my system - cant recall what the commercial name for the eclipse unit is called nowadays

 

[Harvest Fields]

I have had the best magnet cleaner installed for the last 6 years - it was designed by me and produced by Eclipse Magnetics in Sheffield.

Nothing like blowing ones own trumpet, A Rob?

 

[Rob Foster]

Nothing like blowing ones own trumpet, A Rob?

I have designed a couple of things that worked but did not work commercially and lost some lolly and time. We did have a forey into pot hole fixing machines but the cost and competative big boys blew us out. We had some fun tho. Somebody from Dublin tried to produce a system to dilute water - he is still at it !!!!.

 

[Harvest Fields]

I have designed a couple of things that worked but did not work commercially and lost some lolly and time. We did have a forey into pot hole fixing machines but the cost and competative big boys blew us out. We had some fun tho. Somebody from Dublin tried to produce a system to dilute water - he is still at it !!!!.

No worries mate. Just busting your b***s a little. But just so you know. Just because you have a filter fitted, doesn’t mean your water in the system will not be bad. A filter is only as good as the person who powerflushed your system.

 

[Rob Foster]

No worries mate. Just busting your b***s a little. But just so you know. Just because you have a filter fitted, doesn’t mean your water in the system will not be bad. A filter is only as good as the person who powerflushed your system.

I flushed the system ! each year

 

[Harvest Fields]

I would still test the pump
First mate.

 

[Rob Foster]

I would still test the pump
First mate.

on my way upstairs now thanks i will report back

 

[Rob Foster]

Happy days it was the pump, and I had a spare one left over from a project which I soaked in wd40 last year............thank you partic Harvest

 

[Harvest Fields]

Happy days it was the pump, and I had a spare one left over from a project which I soaked in wd40 last year...thank you partic Harvest

No worries mate. Glad that you are sorted.

 

[Harvest Fields]

some of the pre production units still in my workshop like the one installed on my system - cant recall what the commercial name for the eclipse unit is called nowadays

View attachment 34636

Shameless plug there also mate

 

[Rob Foster]

Shameless plug there also mate

Not really the boilermag looks nothing like my prototypes for their eventual product just had a look now. The market is over run with the things nowadays and a few outfits have caught colds with low volume sales

 

[Harvest Fields]

Never seen the one in the picture mate. How strong was the magnet?

 

[Rob Foster]

Never seen the one in the picture mate. How strong was the magnet?

it comes with a heart pacemaker warning - really and we used one to lift out a very heavy cast manhole yesterday cause we could not find the cover keys. Part of the fun with these mags is to leave it on metal furniture or someones car door (if its metal) its the same strength as the eclipse micromag from which it is derived. Specification 5-10 microns at 70 litres per min

 

[Chewitt]

Hi Rob,
The Eclipse unit is a Boilermag, they are a really good bit of kit.

 

[Chewitt]

Hi Rob,
The Eclipse unit is a Boilermag, they are a really good bit of kit.

 

[Rob Foster]

Hi Rob,
The Eclipse unit is a Boilermag, they are a really good bit of kit.

I know I designed it the mag is awesome

 

[Harvest Fields]

I know I designed it the mag is awesome

You designed it Rob? Really? I never knew that mate. How come you haven’t mentioned it before