Wiring Two V8043E to a L8148E


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Old 09-11-08, 11:33 AM
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Wiring Two V8043E to a L8148E

I have an L8148E Aqaustat relay on my boiler and I would like to wire in two V8043E zone valves and two seperate thermostats. Do I wire one of the yellows from the V8043 to each thermostat and then from the thermostats to "T" and the other yellows from the V8043 together and connect to "Z". I'm pretty sure the red leads from the V8043 are connected in parrarell to "T" and "TV". I drew up a diagram but couldn't post it. Any Information would be appreciated. Thanks Rick
 
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Old 09-11-08, 02:31 PM
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Hi Rick, you can set up a free account at www.photobucket.com and upload your pics/drawings there. Post a link here for us to view them.

The install sheet for the 8148E does say that you can power a max of two 8043's from the internal transformer... I would personally use an external transformer myself ... and wire it as below, but if Honey says it's ok ... I suppose it's OK ...

One yellow from each ZV (zone valve) to one side of each t'stat.

One wire from the low voltage side of the 24VAC transformer to the other side of both t'stats.

The other wire from the low voltage side of the 24VAC transformer to both of the other yellows.

The reds go together (parallel), and connect to T and TV on the 8148.
 

Last edited by NJT; 09-11-08 at 03:24 PM.
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Old 09-11-08, 03:22 PM
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Whipped up a diagram for ya ...

 
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Old 09-15-08, 08:34 AM
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Thanks!! This info was a great help, and taking the time to whip up the diagram was very much appreciated.
Thanks again
Rick
 
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Old 11-02-11, 06:35 PM
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This is awesome. Thank you so much for making this easy to follow and understand. I now have two zones working perfectly and I have a happy wife!!!
 
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Old 11-03-11, 03:20 PM
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Glad it helped ya Rich! Happy Heating!
 
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Old 03-04-12, 02:22 PM
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I used this diagram to successfully wire up two zones in my house with the V8043E zone valves. Now I need to add a third. I am using an 8148E Aquastat. I have read the 8148E can only support 2 V8043E zone valves and that I will need to add a second Transformer. Does anyone have a version of this diagram for 3 zones?
 
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Old 03-04-12, 03:31 PM
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If I were going to add a third zone valve and had to add another transformer anyway, I would probably run ALL of the zone valves off of the new transformer. I would probably opt for a Taco ZVC 404 control panel too... but I don't get to spend your money, do I ?

Let's see what I got in the library already made up... stand by.
 
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Old 03-04-12, 03:41 PM
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OK, this drawing has two valves shown, but if you just ignore the second valve, and wire your new valve as shown with a new transformer, the wires that say "TO AQUASTAT ON BOILER" would wire in parallel with the RED wires going to T and TV on your aquastat.

The other option would be to draw in a third valve to this drawing, and rewire all the valves to run off the new transformer.



The MOTOR wires are YELLOW, and the ENDSWITCH wires are RED.
 
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Old 03-04-12, 03:52 PM
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I should probably explain why I would choose to wire all the valves from the new transformer.

Let's say something happens, or a goof is made, and the transformer in the aquastat is accidentally shorted and 'toasted'. What then? New aquastat? Yeah, most likely. There goes a couple hundred.

If the separate transformer gets fried by some accident or failure, what are ya out? Twenty bucks maybe?

Use a 40 VA transformer...

Patriot Supply - AT140A1000
 
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Old 03-06-12, 05:55 AM
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As always, I am very appreiative of all you help. Thank you so much - and I will take your advice and run all off separate transformer.
 
 

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