What are the terminals S1 and S2 for? I want to install a zwave thermostat, but these t 2 wires don't show anywhere.

As a side, is there a wireless thermidistat contol on the market?

S1 and S2 are connections for an outdoor temperature sensor (older thermidistats) or a remote indoor sensor (newer thermidistats). Some features of the thermidistat (cooling lockout, auto humidify, etc.) require the outdoor sensor. See the installation instructions for more details.

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Originally Posted by KC13

S1 and S2 are connections for an outdoor temperature sensor (older thermidistats) or a remote indoor sensor (newer thermidistats). Some features of the thermidistat (cooling lockout, auto humidify, etc.) require the outdoor sensor. See the installation instructions for more details.

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I'd look at the installation instructions if I could find them. I've searched all over the web, but cannot find them.

Can you lead me to them?

Thanks!

What model do you have? Could be "TSTAT**PRH**" or "T6PRH**"...

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Originally Posted by kc13

what model do you have? Could be "tstat**prh**" or "t6prh**"...

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Tstatccprh01-b.

Unfortunately, they aren't available on the HVACPARTNERS website either. What specific info are you looking for? I am very familiar with these controls...

I re-read your original post. If additional features are what you want, but you have a limited number of wires available, the newer-style thermidistat (T6PRH) is a 2-piece system that only requires 2 control wires between the wall-mounted display unit and the control module (which mounts near or on the indoor unit). All functions of the older-style thermidistat are available (and a few new ones) without fishing wire or opening walls.

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Originally Posted by KC13

I re-read your original post. If additional features are what you want, but you have a limited number of wires available, the newer-style thermidistat (T6PRH) is a 2-piece system that only requires 2 control wires between the wall-mounted display unit and the control module (which mounts near or on the indoor unit). All functions of the older-style thermidistat are available (and a few new ones) without fishing wire or opening walls.

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I was trying to determine what the exiting wires were, because I want to install a wireless thermostat. I'm also trying to find a wireless thermostat that might have the same functions as the Thermidistat, but it doesn't look too promising.