flowswitch

ST-5 and ST-6 ..away from the "stock" setting

Amen Russ !

and I answered the adjustment question above on the ST-6.
That adjustment is about the spring tension, and getting the slider closer to the reed.
Otherwise, the farther you go away from the "stock" setting of the reed alignment,
the less reliable it becomes.. ...............no other adjustment there.

But the ST-5 can be adjusted for low flow..
WE needed a 5.5gpm system to double-as a carpert 'n' tile machine,
with the extra heat at lower-flow.. aprox 2.5 to 3gpm..
We found that a stainless steel screw inserted into the center of the magnetic slider made it reliable.
We did have to replace the slider every 4 or 5 years, but that's so close to the average 5 to 6 years,
..so I'm happy.

This reminds me..
Y'all with the 115 voltAC heaters..
Since pressure-actuated unloaders are SO popular (for price),
and flow (and Pressure) switches directly react to the "leaks"
allowing "re-pressurizatoin" of the sysetm when the trigger-gun is off..
ALWAYS make sure you have a fuel solenoid with a "Delay-On coil"..
They "delay on" 4 to 6 seconds which nicely inhibits the heater from kicking "on",
when flow (or re-pressurization) occurs for a few seconds.

Now,
I thought I could ignore the earlier question, as I don't like to point a finger,
but I realize you are asking a "technology" question..
.................Why are pressure switches dangerously popular ? ?
Y'all buy for price !!!
.....................................:slap::slap:
..EVERY time you ask for "cheap,"
you stimulate a "bean-counter" to offer you something less than "Long-Term-Low Cost"
The MOST important thing to learn out of a recession..
STOP ALL perpetuating mistakes..
Including buying for "price", when you were supposed to show up on time,
and deliver the quality service you promised..
The BEST contracts being written right now, are where the last guy didn't deliver on his promises..
....... ..Equipment issues are "a great influence" on this !
The ONLY way YOU can focus on service, is to be confident in your equipment..
..and the tech that backs-you-up. Eh?
Be STRONG competition,
NOT "Mr. Fix-It" on poorly engineered "for cheap."

Know your local sevice center, his weaknesses and strenghts.
Then call people like me 'n Russ,
for any "2nd opinion".
 
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I like the delay on idea, if i have a burner that does not have a delay on coil, but when I pull the trigger it delays for about 2.5 seconds, what could be causing that?



Lets have some visual​



​
​
1 010003346 Brass housing
2 200006490 Float with magnet
3 040001260 Screw
4 200006550 Reed switch, complete
5 060000700 Spring
6 050000020 O-ring​

7 010003350 Sealing screw




ST-5 Flow Switch Description Below & Drawing Link Here
1 010001455 Brass housing
2 200005520 Float with magnet
3 020001200 Plastic housing
4 040000720 Screw
5 040000730 Nut
6 050000115 O-ring
7 100001470 Outlet screw​

8 200005455 Reed switch, complete

 

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Sounds good. Thanks

I tinkered with it a bit and adjusted the air flow down. It reduced the delay a great deal. And yes smoke was a problem upon cut out. (white)

I will do some boiler combustion testing before the season.
 
the white-puff before ignition

The air adjustment is a definite "sweet-spot"..
close the air bands enough to see a little smoke,
then open it back to just where it clears.. no wisps of gray.
Give it no more air than that, or it tries to "blow-out" the spark..
causing the hestation to ignite... that's the white-puff before ignition.

Electrode adjustment plays in there too,
and the recommended adjustment for the gap for pressurewasher heaters
is different than what's in most of y'all's manuals..
e-mail me for a diagram...
it's ALL about reliability.
:dirol:
 
I put in a new reed switch the burner would cut off like it should then come back on a few seconds later.I thought about Jerry saying the magnets come out of the shuttle so checked that next.
Sure enough they were out so I set everything back in place took a turn off the spring and all is back to normal.It looks like I may have replaced the last flow switch housing prematurely since I didn't bother checking the magnets.
 
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