The following wiring diagrams are available for the OUH range:
Benson OUH2 - Wiring Diagram - August 2013 - https://www.reznor.co.uk/wp-content/uploads/2023/12/Benson-OUH2-Internal-Wiring-Diagrams-EN-2013-08.pdf
Benson OUH2 - Wiring Diagram - March 2011 - https://www.reznor.co.uk/wp-content/uploads/2023/12/Benson-OUH2-Internal-Wiring-Diagrams-EN-2011-03.pdf
Benson OUH2 - Wiring Diagram - March 2012 - https://www.reznor.co.uk/wp-content/uploads/2023/12/Benson-OUH2-Internal-Wiring-Diagrams-EN-2012-03.pdf
Benson OUH2 - Wiring Diagram - March 2015 - https://www.reznor.co.uk/wp-content/uploads/2023/12/Benson-OUH2-Internal-Wiring-Diagrams-EN-2015-03.pdf
Benson OUH2 - Wiring Diagram - October 2015 - https://www.reznor.co.uk/wp-content/uploads/2023/12/Benson-OUH2-Internal-Wiring-Diagrams-EN-2015-10.pdf