Pump timer

[CanuckPool]

From what I understand its not good for uncirculated (hot) water to sit in the heater manifolds, I guess it causes premature wear... can any one confirm this?

[tenax]

i wouldn't worry about incirculated hot water..it has hot water running through it all the time when running, eh? i don't believe that's the issue. it's the issue of whether your heater has a cool down fan system or not. i have a jandy 2. it says nothing that i've found to indicate there is such a system in it..what it has is 2 schedule 80 pvc pipes with the intent to bleed off hot gases over their length so it's not so hot when it hits the schedule 40 pipe about 8 inches past the schedule 80 tubes. sounds great in principal but given i've been there with melted pipes when in my old system, i forgot to turn the heater off 15 minutes before the pump and came out the next morning to find water shooting all over and my pipes bent like spaghetti. i can laugh about it now, but if it had got to the pipe that goes into the ground..that could have been some major trouble. so, i have a 12 minute pre-shut off switch built into my system to shut the heater off that amount of time before the pump. works great and the only time i would have a potential problem is in an electrical storm and a lightning strike (same problem frankly that a heater with a fan would have..power goes out, your screwed)..so..whatever you do, shut the heater off in an electrical storm

[CanuckPool]

Hey Jeffski, is yours an electronic ignition Mini max or Millivolt? Mine is a minivolt I am pretty sure it doesn't have a fan... since there is no power going to the unit to power one.

Is there anyone who has a minivolt setup that can take a picture of their timer and setup?

[anotherpyr]

Have you tried contacting Pentair (1-800-831-7133)?

I figure there has to be some kind of a device to connect between a typical timer/fireman switch and the thermostat board.

*** Don't try the following at home ***

It seems like a transformer to step the voltage down and then a low voltage relay should do the trick. But this is normally where someone jumps in with why didn't you just buy X instead of doing that? Actually you'd want to change the voltage to DC to reduce the chances of inducing a current in the low voltage line due to magnetic fields. I'd still be somewhat concerned that voltage spikes could be sent when the relay is tripped.

[Jeffski]

Yep, mine is the Mini Max and has an electrical connection.

[CanuckPool]

I called pentair and they told me that the tech dept has repeatedly told them (sales and customer service) that all their heaters do not require a cool down period... now with that being said, they told me that the tech dept will call me back in the next couple of days to confirm this.