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Author Topic: anyone got experience of a glow worm space saver 38?  (Read 2571 times)
oh2flywell
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« on: September 19, 2014, 10:22:31 AM »

I have a customer who is looking to link this boiler into a thermal store/wood burning stove set up. Having a look at the boiler and its age I assumed that it would be a vented system however I can't find any f&e tank however there is no fill point from a cold water fed either (or drain point)...... anyone got any idea of how this system is designed?

Any suggestions gratefully received.

Andy
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baker
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« Reply #1 on: September 19, 2014, 02:39:29 PM »

if their is no f/e
or filling loop
it could unlucky and its a primatic system
and the domestic hot water cylinder is specialist design to fill the heating
 if experienced have a good look at the cylinder and you may see something not right fingers crossed!   
if so run a mile
if you drain it down and it a old system have a guess what will happen/
but its the best time of the year to sort it
  signofcross 

baker
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biff
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« Reply #2 on: September 19, 2014, 03:15:39 PM »

If you send a pic....
            There was a Glow Worm Swift flow space saver. They were kitted out with a very small pressure vessel inside the casing. They were combis and at the time I thought they were pretty good.
     They were pressurised to 1.5 bar from the mains loop. The loop was them disconnected, (the law).
   I had the little heat-exchanger pack up in one after just 4 months but it was replaced under the guarantee.(180.00) I found the little digital clock was a Buxxer to get my head around.I installed at least 5 of these in one area and got excellent feedback from the customers.(early 90s) You must not forget to disconnect the loop.
                                                                                      Biff
  No Tank,, No cylinder.you just turned on the tap and the boiler fired up. I liked them.
« Last Edit: September 19, 2014, 03:17:25 PM by biff » Logged

An unpaid Navitron volunteer,who has been living off-grid,powered by wind and solar,each year better than the last one.
sb79
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« Reply #3 on: September 19, 2014, 08:33:32 PM »

Job to say exactly what the system is but if nothing jumps out at you - no pressure vessel externally, no header tank, then as baker says it could be a primatic cylinder. Of course, there could be a vessel mounted hidden away or a header tank hidden away nicely, I have spent hours tracking things down in houses when customers haven't a clue where the vital bits are.

The biggest clues will be between boiler and heating pump. if there are pipes going off to other places before the pump then there may well be a vessel or header hidden away.

A Glow-worm space saver is a pretty old, very inefficient lump of a thing, over engineered like the ideal mexico and pretty simple. It will have a pilot light rather than auto ignition I would think and is probably best checked over thoroughly by an independent boiler engineer (not british gas who will quite simply condemn it on account of it being open flued and not fan assisted and give an extortionate quote to replace it) before working out if it is worth keeping.

Realistically, I would think that if they are going into this system to the extent that you say then it would be madness to leave this thing in and not replace it now as there will never be a better cheaper time to do it.

Speaking as someone who has installed a good many Glow-worms and the Saunier-Duval equivalents, I would never have modern one of theirs but the old ultimates etc were good boilers.
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desperate
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« Reply #4 on: September 19, 2014, 10:45:21 PM »

I would agree with sb79, if you are going to spend good money on building an efficient system, it would be mad to leave an ancient old relic like that in operation.
It was designed for installation in an open vented system, but it is possible that it was converted to a sealed system or maybe a primatic, but those cylinders should be marked quite clearly as such.

Whatever, don't build a new system round a piece of junk like that, it'll need replacing soon anyway.

Desp
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www.jandhbuilders.co.uk

still a crazy old duffer!
sb79
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« Reply #5 on: September 20, 2014, 08:22:19 AM »

Glow-worm spacesaver. Probably the most ironic name for a boiler ever.......
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baker
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« Reply #6 on: September 20, 2014, 10:19:09 AM »

you can tell by looking at the cylinder
the coil tappings are further apart
and sometimes their is bleed vent on coil feed
baker
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oh2flywell
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« Reply #7 on: September 22, 2014, 08:33:42 AM »

Cheers guys. It is a primatic setup - typically there is no form of labeling on the tank to say so however when I bleed water from the rads then the f&e tank above the cylinder starts refilling. As ever budget comes into play and although the plan is to replace the boiler eventually it is not just yet........

Thanks for all your comments.

Andy
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baker
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« Reply #8 on: September 22, 2014, 01:37:35 PM »

you could look into / a plate heat exchanger on the side of the cylinder  or a willis syfon
to fit solar t
baker 
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