Installation 6-10
Revision 2 - 20 March, 1997 HP SERIES DIMMER OPERATING MANUAL
6.4 Wall Mounting Dimmers - Ventilation
The HP12-WMTR and HP12-WMSC dimmers are fan cooled with considerable
assistance from natural convection. The air intake is by slots at the bottom front, and
exhausts through slots at the top and top-front.
The HP12-WMTR and HP12-WMSC dimmers are intended for wall mounting in
unenclosed spaces. Mounting within cupboards is not recommended.
If the dimmers are mounted within cupboards, allow at least 150mm above and below
the dimmer, and at least 100mm at each side and the front of the dimmer. In addition,
the cupboard must be vented with at least 150 square centimetres (24 square inches)
per dimmer at the top and bottom of the cupboard. Additional venting area will serve
to further reduce internal dimmer temperatures and will enhance the dimmer’s
reliability.
Multiple dimmer arrays should be spaced at least 100mm apart vertically, and no
more than three dimmers high, to avoid excessive heating of the top dimmer.
Dimmers should be spaced at least 50mm horizontally.
Dimmers should be mounted at least 300mm from the floor to avoid excessive ingress
of dust and fluff, or as dictated by local building statutes.
Dimmers must be mounted at least 150mm below ceilings or shelves for adequate
ventilation.
>300
>100
>150
>50
HP12WM
HP12WM
HP12WM
HP12WM
FLOOR
CEILING
JANDS
JANDS
JANDS
JANDS
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