Whilst this is a photo copy, and some of the pages are a little askew, it was all readable and intact. A real bonus finding an old manual for a classic piece of kit that no other site had.
excellent quality, contains circuits and scan quality, 110 pages
Text excerpt from page 7 (click to view)
Important safety requirements
This hob must be installed in accordance with the Gas Safety (Installation and Use) Regulations (Current Edition) and the IEE Wiring Regulations (Current Edition).
FITTING THE GAS HOB WITHOUT A COOKER HOOD ABOVE
Provision for ventilation
Detailed recommendations are contained in the following British Standards Codes Of Practice: B.S. 6172/ B.S. 5440, Part 2 and B.S. 6891 Current Editions. The hob should not be installed in a bed sitting room with a volume of less than 20 m3. If it is installed in a room of volume less than 5 m3 an air vent of effective area of 110 cm2 is required. If it is installed in a room of volume between 5 m and 10 m an air vent of effective area of 50 cm2 is required, while if the volume exceeds 11 m3 no air vent is required. However, if the room has a door which opens directly to the outside no air vent is required even if the volume is between 5 m3 and 11 m3. If there are other fuel burning appliances in the same room, B.S. 5440 Part 2 Current Edition, should be consulted to determine the requisite air vent requirements.
700 mm 400 mm
mm 50 mm
FITTING THE GAS HOB WITH A COOKER HOOD ABOVE
The hob may be located in a kitchen, a kitchen/diner or bed sitting room, but not in a bathroom or shower room. Before making the cut out in the worktop ensure that the edges of the hob that are to be near either a side or rear wall have a minimum distance of 55 mm. between the edge of the hob and the wall. The minimum distance combustible material can be fitted above the hob is 400 mm. If it is fitted below 400 mm. a space of 50 mm. must be allowed from the edges of the hob. The minimum distance combustible material can be fitted directly above the hob is 700 mm. A minimum distance of 100 mm. must be left between the side edges of the hob and any adjacent cabinets or walls.