aquastat question - JimD825


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Old 10-29-11, 09:43 AM
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Question aquastat question - JimD825

hi guys,
i am new to site, i have been looking for info on the l8124a, and finally came accross this site and looks like you guys know your stuff.
i have an old oil fired boiler w/ summer winter hook up and the honeywell L8124a aquastst, i just installed a navian on demend water heater and want to disable the call for DHW from the boiler, is that possible? i only want heat and have already capped the DHW line coming off the boiler.
from some of what i've read it seems i could disconnect the blue wire and disable the low limit??
any insite would be appriciated.
 
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Old 10-29-11, 11:57 AM
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Hi Jim, I've moved your post to it's own thread so as not to interfere with the other discussion in progress.

I don't like advising modifications to aquastats. Someone makes a mistake and who gets blamed? ME, or whoever told you to do it...

Forget the blue wire, that's not the way... it's only half of what you need.
 
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Old 10-30-11, 05:47 PM
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ok, so how should i deal with it?

i was actually hoping to abandon the whole system but cold weather got on me.

i want to get rid of oil all together.
 
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Old 10-30-11, 05:52 PM
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First thing you need to do is cut those caps off the domestic coil unless it was leaking. You will build steam in the coil and now can have an unsafe condition. If it was leaking ignore what I just said.
 
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Old 10-30-11, 07:16 PM
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Could just drill a small hole in one of the caps to provide pressure relief.

Jim, I believe I sent you a private message yesterday? Please check...
 
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Old 10-31-11, 06:06 PM
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can i add a PRV to the DHW out as opposed to capping it? can i shut off the cold water supply to the HW loop? as i said i plan to get rid of the system completely at end of this season.

NJT, i did get private msg, thanks, i understand.
 
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Old 10-31-11, 07:03 PM
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Hold up a minute Jim, did you only unhook one end of the coil? and the other end is still connected to the water supply?

If so, you've set up a 'dead end' in your water supply piping, which is generally not a good idea. A dead end pipe like that can become a 'breeding ground'... you don't want that!
 
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Old 11-03-11, 04:15 PM
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i did not touch the coil but i did cut and cap the line exiting the boiler.

i simply want to disable the DHW and just use boiler for radiators, what is the best method to use? cut off cold supply to coil?

i apologize for the round and round i don't really have a good working knowledge of these systems.
 
 

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