BBB Hot tub

[Chug]

The boiler I'm using for the hot tub is not starting up, everything seems to be as it should but still no go, I hope to have a look at it over the next few weeks but I'm thinking we may need to find another heat source? maybe an M67 again if anyone can bring one??

But I have another working electro oil burner that might fit the boiler only I'm not sure if the thermostat is compatible so it will just run until it's turned off if not, but its a possibility.

[Dickjotec]

I had problems with my boiler. It turned out to be the pressure adjustment valve. On mine there was a composite rubber  diaphragm which the bio ate. I made a metal replacement for the valve and it is now fine.

[julesandtash]

Are you getting atomisation of the fuel chug?  There could be many reasons why it wont start. Dampness on  the HT cables, corrosion between one or both electrodes and the blast tube shorting out the arc, crud on the sintered filter on the back of the nozzle (I get that a few times a year with the pool boiler), clogged filter in the oil pump itself, degraded rubber components as Dick says.

You need to be methodical when trouble shooting.

Is motor turning?
Is fan and pump turning?
Is fuel available at the bleed port?
Is fuel coming out of the nozzle? If so, is it a fine mist (good) or more of a jet (bad)
Is there an arc at the electrodes?
If so, is it being projected forward in front of the nozzle by the air flow or just a small intense arc that is nowhere near the fuel mist?

[Tony]

I'm sure I can fit the M67 and drum into the car, might be the only thing we bring!  Trouble is that magnet pump we used for circulation before I've given away to a friend to keep his fish alive in an outside pond.  Any pumpophiles have a small, suitable (quiet) pump?

[Julian]

'course we do ... I'll dig out a Mono MS (about 17 ltrs/min I think) and check it works.  If it's OK I'm happy to lend it to the cause.

[Head Womble]

'course we do ... I'll dig out a Mono MS (about 17 ltrs/min I think) and check it works.  If it's OK I'm happy to lend it to the cause.

I'm happy to pick it up before the BBB and bring it along on Friday if that helps.

[Tony]

Will also need inlet and outlet barbs suitable for garden hose!

[Chug]

I have a CH pump all rigged up with pipes etc that we usually use with it so no problem there.

The burner is doing everything it should, motor, fan run etc and fuel mists out the nozzle and it sparks but no flame, I hope to take it out and have a good look one evening this coming week weather permitting.

If it comes to needing Tony's M67 then just the burner is needed as we can sort a drum out.

[julesandtash]

Chug, have you tried igniting the mist with a blowlamp or similar?

[Tony]

I have a CH pump all rigged up with pipes etc that we usually use with it so no problem there.

The burner is doing everything it should, motor, fan run etc and fuel mists out the nozzle and it sparks but no flame, I hope to take it out and have a good look one evening this coming week weather permitting.

If it comes to needing Tony's M67 then just the burner is needed as we can sort a drum out.

Ah yep and heat exchanger coil again, I saw how manky the water was in the drum the M67 occupied, wouldn't do good things to the pool plastic I'm sure

[Chug]

Jules, My next trick is to try it with a blow torch, I got as far last time as tying a diesel soaked rag on a stick but it really started pissing down with rain and I couldn't light it so I gave up.

Do you still have the HX coil Tony?

[Tony]

Yes, got the coil, need to check I've got all the jubilee clips and some hose , don't think we need much more.  Maybe pool lighting again

[oakwoodtv]

Do we need bio.

[dgs]

I've got 20 litres of red diesel to bring for the M67.

[Tony]

I guess the usual arrangement, bring flammables for the M67, bio preferred just because the exhaust smells nicer and it burns cleaner, doesn't have to be great bio, any old soapy crap will do!