KA6 Keystoker Question

 
lzaharis
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Post by lzaharis » Sun. Nov. 27, 2016 4:54 pm

naga viper wrote:Bottom sounds hollow top not so much. Guessing water logged?
Do you have a steel expansion tank up on the ceiling? Or a bladder tank?

If it is a bladder tank, the bladder may have failed. depress the Schrader valve on the bottom of the tank and see if you get water. if you do, the tank is bad. if you get air, it may need the air pressure adjusted. Drain water from the boiler until the pressure reads zero, and adjust the air pressure in the tank to 12 psi.[/quote]

Steel expansion tank on ceiling (came with boiler) depressed valve only air came out.[/quote]

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Your horizontal steel expansion tank does not have an airtrol valve in the bottom of the tank that is fed from top tapping???????????

With the Airtrol valve you need a small wrench to bleed the water out to get the right 1/3 air 2/3 water ratio.

You have to have a 1/3 air 2/3 water ratio in a steel expansion tank that is hung in a ceiling joist.

The last but not least item is your Domestic Hot Water Coil may have a leak and is pressurising the steam chest with the homes feed water pressure.

Do you have a separate hot water heater??

To test the coil you need a complete Shraeder valve and 1/2"reducer bushing and a second 1/2" pipe plug that you can use to plug the domestic coils tappings to see if it is still good by pressurizing the DHW coil with air.

 
lzaharis
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Post by lzaharis » Tue. Nov. 29, 2016 7:59 pm

I was wondering if you found the problem
with your KAA-6 and what the problem was?

 
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naga viper
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Post by naga viper » Tue. Nov. 29, 2016 8:35 pm

Nope back to work no time to .


 
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CoalisCoolxWarm
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Post by CoalisCoolxWarm » Tue. Dec. 06, 2016 11:57 pm

Do you have a bypass loop from a on the supply on top of your KA6 that runs to return?

If you don't, the water can stratify and get hotter at the top.

That valve is a TPV (Temperature/Pressure Valve).

Did you also say that if you run domestic hot water that your boiler pressure drops? That's a sign of a problem :shock:

 
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McGiever
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Post by McGiever » Fri. Dec. 09, 2016 9:19 pm

Nope...Valve is a PRV...pressure relief valve...valve provides only protected for pressure, not for any temp limit, max. pressure is 30# for a hot water system or in the case of steam 15#.

 
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CoalisCoolxWarm
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Post by CoalisCoolxWarm » Fri. Dec. 09, 2016 10:06 pm

McGiever wrote:Nope...Valve is a PRV...pressure relief valve...valve provides only protected for pressure, not for any temp limit, max. pressure is 30# for a hot water system or in the case of steam 15#.
Thanks for that correction!!!

:cheers:


 
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naga viper
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Post by naga viper » Sat. Dec. 10, 2016 1:02 pm

Yes bypass loop is installed.
Not sure but may have cured dilemma
I had feed way back for summer months
dialed in for more feed so now more fuel on fire bed = less demand

 
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StokerDon
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Post by StokerDon » Sat. Dec. 10, 2016 1:36 pm

naga viper wrote:
Rob R. wrote:Usually due to a water logged expansion tank or leaking tankless coil.
Ran hot water for 4-5 minutes and psi came down from 20psi to 15psi?
If your boiler pressure is dropping with temperature, there is not enough expansion in your system. From reading this thread, the expansion tank came with the boiler. That means it is most likely a bladder type. Earlier in this thread you said it sounded hollow on the bottom, that is good, the tank has not failed.

Most likely the expansion tank is just to small for the size of your system. This causes pressure swings as the boiler temperature changes. The pressure probably goes up close to 30 PSI when you are not around causing the PRV to weep.

-Don

 
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naga viper
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Post by naga viper » Wed. Jan. 04, 2017 4:17 pm

Well a late response but Thank you to all and thanks Rob Replaced expansion tank after much playing around back on track.
Must have melted the bladder during summer months?

 
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PRengert
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Post by PRengert » Wed. Jan. 18, 2017 1:52 pm

Check your automatic fill valve, it my be leaking.

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