The following installation manuals are available for the SE Optima range:
Ambirad Optima E-HE EN - Installation Manual - https://www.reznor.co.uk/wp-content/uploads/2023/12/AmbiRad-Optima-Installation-Manual-E-HE-EN.pdf
Ambirad Optima SE - Installation Manual - June 1997 - https://www.reznor.co.uk/wp-content/uploads/2023/12/AmbiRad-Optima-Installation-Manual-SE-EN-1997-06-AR053-0697.pdf