MEDC XB15 User Manual

Page 8

EN54-23 Coverage Data & Explanation of Terminology

Ceiling Mounted Devices- C-x-y
C - Ceiling mounted Device

x - The maximum height of 3, 6 or 9m at which the VAD may be mounted.
y - The diameter in metres of the cylindrical volume covered (to a minimum level of 0.4 lux) when the device is mounted
to the ceiling at a height of 3, 6, or 9 m.
Example:
C-3-32 corresponds to a ceiling mounted device giving a coverage cylindrical volume of 32 m, when mounted at 3 m.
Note: The projected space sits within the cylindrical volume and ensures that all areas meet the required illumination of
0.4 lux.
Tip: To convert the coverage diameter y to the width of a square room.
Width of square room = y/1.414 m.

Wall Mounted Devices- W-x-y
W - Wall mounted Device

x - The maximum height of the device on the wall in metres, with a minimum value of 2.4.m
y – The width in metres of the square volume covered (to a minimum level of 0.4 lux) when the device is mounted at a
height x
Example:
W-8-13 corresponds to a wall mounted device giving a coverage cuboid volume of 8 m x 13 m x 13 m, when mounted
at a height of 8 m.
Tip: if the area to be covered is not square, use the larger of either the length or width to ensure that the whole area is
covered

MEDC VAD Coverage Data

Ceiling Mounted

Wall Mounted

C-3-16

Red lens

C-6-6

W-3-5

C-3-32

C-6-31

White lens

C-9-12

W-8-13

Further information is available via the Code of practice (CoP 0001.)
CoP 0001 provides detailed guidance and recommendations on the planning, design, installation, commissioning and
maintenance of VAD’s. A copy is available at the following website:
http://www.redbooklive.com/pdf/CoP-0001-1-0.pdf

03/15