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 Post subject: Re: Adding 12v Electronic valves to rear PnP...
PostPosted: Thu Aug 30, 2012 9:34 am 
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Johnnydefacto wrote:
Definitely ask ELC what valves he is using. I bought 2 pvc ball valves (home depot) and they did not work very well. I had a hard time finding pvc threaded barbs that would allow the 3/4" hose to fit. I think I had to get brass barbs in order to get a good fit and then had some problems with the pvc valve. It was leaking a little bit and making a loud whining noise. I ended up swapping the pvc's with brass valves that worked perfectly. Just make sure you take some hose with you to the hardware store and don't settle for "close enough" like I did.

As for the placement of the valves, even though the manuals are temporary, I would consider putting them in the same place you plan on putting the electric ones so that the install will be a quick swap out. Unless you plan on putting the valves right up against the drain pump (which would make sense considering you are going to tap into the drain pump for your power).

When you do the final electric pumps, please take pictures and do a step by step, I think this is a better way to go then my way of having to run additional wires and pull the switches.


Okay, so an update. Circuit breakers are only 6 amps. The pumps max current draw is 4.5 amps, the valves are rated at 19 Watts, which would be 1.6 amps at 12V (watts = current * voltage). So it could be 6.1 amps, which would cause the breaker to fail. There are two ways around this - first, I believe you could install a capacitor in the line for the valve, which would delay its trigger. I would assume the pump draws 4.5 amps only at startup, and drops from there. Second, the better way to do it. Just replace the breaker with something like a 10 amp one. The wiring is 16AWG, which is good for 22 amps.

As far as wiring goes, it could potentially get tricky. I think the best way to do it would be to buy new connectors, and plug it in, rather than splicing. Haven't priced it out, but they are Delphi weatherpack connectors. You can get them here: http://terminalsupplyco.com/Store/Defau ... Categories. I figure I'll take a 12AWG connector and run two wires off of it (a Y). Replicate the fitting for the pump, and you could either wire the other side directly to the valve, or put a connector on there. Note unfortunately, they don't sell a connector kit, you have to buy all of the seals and connectors separately. PITA, but if you want it to look clean, that is what it takes.

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 Post subject: Re: Adding 12v Electronic valves to rear PnP...
PostPosted: Thu Aug 30, 2012 11:01 am 
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Thanks King. That looks like a nice little project, but it will be very clean when its all done. I do not know what amps my breakers are (I am assuming 6 like yours) but I have never had the breaker fail and my pump and valve share the same one. I have used this system this way since sept 2011 with no problems so far. But if you are going to spend the time doing it, changing to a 10amp would be the way to go.

Keep us updated... oh and how did your temp manual valves turn out for you?

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 Post subject: Re: Adding 12v Electronic valves to rear PnP...
PostPosted: Thu Aug 30, 2012 2:57 pm 
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Johnnydefacto wrote:
Thanks King. That looks like a nice little project, but it will be very clean when its all done. I do not know what amps my breakers are (I am assuming 6 like yours) but I have never had the breaker fail and my pump and valve share the same one. I have used this system this way since sept 2011 with no problems so far. But if you are going to spend the time doing it, changing to a 10amp would be the way to go.

Keep us updated... oh and how did your temp manual valves turn out for you?


Worked great! Just have to keep the panel behind the rear speakers loose.

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 Post subject: Re: Adding 12v Electronic valves to rear PnP...
PostPosted: Sun Sep 16, 2012 12:15 pm 
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Okay, I had a little time this morning, so I went ahead and got working on it. As referenced, the pumps are rated at max 4.5 amps, and the switch max 1.5 amps. So I tried just running both with the existing wiring and breaker. Started by taking out the pump. It is easier if you take the pump out of the housing when you do this, because the wiring is so long, and will get twisted as you unscrew it.

In addition to the valve, you'll need a short 3/4" male-male fitting, easily found at Home Depot in the plumbing section. Screw that into the input end of the valve. You will also need to take the valve apart. Mine used four 5mm internal drive bolts. The reason for that is because as you go to screw it down, the valve body up top will hit stuff.

Looks like this - be careful as the plunger has a spring and it is easy for it to come out, but there aren't any small parts that are easily lost: Image

So screw the base into the elbow from the tank, then screw the pump's body into the valve. Then rotate it over on its side:
Image

Next comes the wiring. The only tricky part with this is that you need two leads. I decided to run mine at the valve, since the other ends would be water proof, but Y-ing them off would compromise that. I got 6' of marine grade 16AWG cable for htis, but I would have been a little better off with 7', so I'd have an extra 6" for the second lead. Anyway, I wired one long one, and one real short one for hte pump:
Image

Then I connected the water proof connectors previously refernced. Note you can find these on ebay for about $5/pair, which will be easier as it is all in one kit and you don't need to order enough stuff to hit the $20 minimum. Again, Delphi Wather Pack connectors. I put one for the pump on the short lead off of the valve, then routed the other end up to where the pump originally plugged in. If you want to make things cleaner, you can order some extra connectors and cut and splice the one from the pump. I figured I'd just leave it alone, though. Note that everything is wiring in parallel to keep it all at 12V. Also, the valve doesn't really matter which is + and which is -, so long as you runcurrent through it. But I put the + on lead 1 and the - on lead 2 (this assumes that brown is + and black is -........brown is a chassis ground in automotive applications). At any rate, this is what it looks like before I put the cover back on:
Image

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