They are clearly quite eloquent at PR, but I wonder who writes their instructions! Could we perhaps see Figure 9?Soler & Palau Ltd is the UK subsidiary of the Soler & Palau group of companies. Established in 1985 Soler & Palau Ltd have been supplying a wide range of specialist fan and air moving products to a diverse national and international OEM client base. ... Soler & Palau (UK) Ltd's operations are based on the prestigious Ransomes Europark Business Estate in Ipswich, Suffolk. From this geographically strategic location products are imported from the various European and Pan Pacific Soler & Palau group manufacturing facilities and stocked at the company's extensive warehouse premises in Ipswich.
In addition to the matter we are discussing, the other unusal (but very welcome!) thing is that they do not actually call for a 3A FCU (as in plugwash's diagram) (which many/most people feel is unnecessary) - meaning that you could use just a standard 3-pole 'fan isolator' without having to change the light switch to DP (per plugwash)
Kind Regards, John