Need info on a Modine G256 unit heater

[Blasirl]

I have a Modine Gas Fired Unit Heater Model G256 (may be a G258 or even G25S- difficult to read) It uses 25,000 BTU to give 20,000 Btu's so I assume it would be considered a 20,000 BTU model. 80% efficiency. The serial number is C5J50129 if that helps. I would like to find a wiring diagram and possibly an operators manual, but anything related to it would be welcome.

I know it has a Klixon Type C4370 Aircraft Circuit Breaker Thermostat Switch in it as I found it when I took it apart to clean and tighten it. The gas valve says "Electro-Magnetic Operator, EM5 149704 Max Pressure 1/2lb G-LP.

 

[Blasirl]

Here are a couple of pic's

 

[D45]

That is a really cool heater!