Garn's and Aquastat's

I am finally finishing my install prior to the heating season. Everything is plumbed, just a question of hooking up the controls.

Essentially I have 2 Garns in series with a pump and heat exchanger behind. The rest of the system is pressurised Glycol mix.

So I need an Aquastat to turn on the circulation pump for the Garns, and I just wanted to make sure I was doing it right. Aquastat in each Garn located in the bung hole next to the loading door, there are 2, the other one I think is used for the Thermometer if you have one. Wired so whichever Garn goes above the set point first activates the pump.

There are additional sensors that feed into the main control system, I am only concerned at the moment about the Garns circulation pump.

Am I missing anything?

Thanks,

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