I have several radiators from the Economy Radiator Company and I would like to control them via arduino/raspberry pi. Can someone help me find the remote codes for these radiators?

I am using and Arduino with irlib to control other appliances in my house and ideally would like to control these radiators in this way. From my research the remotes are made by cotherm and I cannot find any information about them bar a Spanish website with some hex codes that I have not been able to use.

Resources
Remote Manufacturer [Link: cotherm.com]
Radiator Manufacturer http://www.economy-radiators.com
My radiator is controlled by a Cotherm Erd300 controller.
IRLib [Link: github.com]
Spanish website [Link: forosdeelectronica.com]

Any help on this subject would be greatly appreciated.