Question about Pentair Minimax NT Heater

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When I turn on the spa heat it heats the entire pool to the spa temp, I have a aqualink rs4 control with a minimax n7 heater. I looked at the control board toggle switch and it is positioned to spa? Should it be in the off position and let the aqualink do the work?

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  • Pentair Master
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Automated control systems, are made to work automatically. They do all the thinking for you and they turn the proper valves and turn on or turn off, what is supposed to be operating, or not operating, to operate as programmed. So, when you push the button, so that you could use your spot, it will do everything that it needs to do, so that you are able to use it.
Normal position, is swimming pool operation, and with a pool - spa combo, everything is automated. Desired spy use, will force the automated system to change from normal pool operation to spot operation: that means suction valve and return valve will automatically change the direction of waterflow.
if an automatic pool sweep booster pump was on, it will now be turned off. If the water now coming from the spa, is now going through the heater and a temperature is sensed is lower then set temperature of spa, the heater will come on.
when finished using spa, desired position is pressed to return to normal operation, which is pool operation everything will be reversed.

but consider this, what can happen as a problem or symptom that you have reported, can be due to the fact that the manual toggle switch which is located on the automatic suction valve and automatic return valve actuators, have been switched to the opposite position the automated control system does not know where the water is coming from or where the water is returning to!
so if your system is taking water from the pool, thinking it's coming from the hot tub, the set temperature for hot tub is say 100°, and once you return the system controls back to pool, it thinks it's coming from the spa! So that means that the pool water, which could be 82°, is now going to the system, thinking it is spa water, it will heat the whole body of water in the pool to 100°.

good luck, and I would review the link to the users guide, in the previous answer.

Posted on Mar 31, 2015

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