Water Pressure Pump

[botanybay]

Originally Posted by poiu

My system has a timer, which gives protection from over-running, either from a failed off pressure switch or from a failure to build pressure, as happens when I let a tank go dry.

Now that is a really great concept, the timer self resets I assume on each cycle? Or just a total amount of runtime and then manually reset?

[poiu]

Originally Posted by botanybay

Now that is a really great concept, the timer self resets I assume on each cycle? Or just a total amount of runtime and then manually reset?

It resets when power is off and starts timing when power is on.

[Dockhead]

Originally Posted by poiu

It resets when power is off and starts timing when power is on.

What a great concept. Who makes it?

[a64pilot]

Here is one, I like that it is adjustable, from 1 to 30 min.
Mark Grasser - DC Power Solutions
On my list, maybe

[Dockhead]

Originally Posted by a64pilot

Here is one, I like that it is adjustable, from 1 to 30 min.
Mark Grasser - DC Power Solutions
On my list, maybe

Nice, but won't work for me -- I'm 24v.

[Kenomac]

Originally Posted by poiu

Change it for two pumps in parallel, controlled by a standard pressure switch. If one fails, you cope with the low flow - just go onto a rota for showers until the new one or spare part comes. If the pressure switch fails then rig a manual override.

We have the same two parallel pump set up with two Par 4 40psi pumps in the spares locker along with rebuild kits.

[a64pilot]

Originally Posted by Dockhead

Nice, but won't work for me -- I'm 24v.

Call him, I'd be surprised if he doesn't have or can't make a solution.


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[botanybay]

Nice, if you find out they have a 24 volt solution I am interested in several!

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[TeddyDiver]

Originally Posted by Dockhead

Nice, but won't work for me -- I'm 24v.

Reckon it would work but propably no warranty anymore. It's installed in series so it's just the small internal resistance making the voltage drop seen by the device.

BR Teddy

[poiu]

Originally Posted by botanybay

Nice, if you find out they have a 24 volt solution I am interested in several!

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It's just a bog standard industrial relay. I just looked in the RS catalogue. They have 1,007 different timer relays. For 24v and with an interval timer the following linked product looks like it will do the job :

RE22R2HMR | Interval Delay Single Time Delay Relay, Screw | Schneider Electric

Some off-delay timers will be OK. A bit confusing as the terminology for relays is inconsistent between manufacturers. You need to look at the timing chart. McMaster Carr will have a ton of suitable components I expect. You may need a contactor as well if your pump is big.