What kind of heater is this? Need wiring diagram also

[4CEFED]

I have a Hayward comfort zone natural gas heater which I am trying to fix. I need to find an electrical schematic but I cant read the model # anywhere.

Does anyone know what model this is so I can find a diagram?

Or does anyone know how this heater functions, it appears to not have an external power source? The heater worked 2 years ago until the pilot tube cracked. I just replaced the pilot assembly and the pilot lights but the main valve wont turn on. There is a small amount of voltage on the wires but I dont know if its enough to open the valve. First I need to know if the system operates on self generated low voltage, and secondly if so, how much voltage?

http://img836.imageshack.us/img836/7123/poolheater.jpg (http://imageshack.us/photo/my-images/836/poolheater.jpg/)

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[PoolDoc]

Post a bigger picture, please. If there is a label, photo it.

Also, open the front panel, and see if there is a label on that panel.

[4CEFED]

The labels inside and out are completely gone, multiple people have tried to read. Hoping somebody has something close sitting in their back yard that they can compare to.

http://img221.imageshack.us/img221/8969/20130604170313.jpg (http://imageshack.us/photo/my-images/221/20130604170313.jpg/)

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[4CEFED]

How much voltage should I have on the gas valve wire to open it? Is it a millivolt system? I have 250 millivolts on it so either I have a bad gas valve or not enough voltage? Any help would be greatly appreciated since currently in Minnesota the highs are in the 50s and my pool is freezing...

Thanks.