Installation
6-2
Revision 2 - 20 March, 1997
HP SERIES DIMMER
OPERATING MANUAL
6.1.3
Rack Mounting - Ventilation
The HP12-TR and HP12-SC dimmers are fan cooled, with the air intake at the right
and air exhaust at the left. All racks must have adequate ventilation for the side-to-side
airflow of the dimmers. Fully enclosed racks will cause overheating problems.
Racks must allow
at least
100 square centimetres of air venting per dimmer at each
side of the rack, level with the dimmer’s intake and exhaust slots. Additional venting
area will serve to further reduce internal dimmer temperatures and will enhance the
dimmer’s operational reliability.
Dimmers may be stacked in racks without intervening rack spaces as long as the racks
are adequately vented.
Racks of dimmers must be placed such that one rack does not breathe the hot exhaust
of the rack to its right. Allow at least 0.5m (18") between racks unless duty cycles are
light.
6.2
Wall Mounting
The HP12-WMTR and HP12-WMSC dimmers are intended for use in fixed
installations. The dimmers are designed to be attached to the wall using the supplied
brackets. The dimmer is not required when positioning and fastening the brackets.
The brackets associated with the HP12-WMTR and HP12-WMSC dimmers allow a
variety of mounting and wiring options:
•
The dimmer may be mounted in a 19 inch equipment rack.
•
The dimmer may be mounted flush to a wall with the cabling coming through the
wall from behind.
•
The dimmer may be mounted proud of a wall with surface cable conduit for all
wiring. The conduit may run either horizontally or vertically.
•
The dimmer may be mounted over a vertical cable tray up to 420mm wide and
75mm deep.
•
The dimmer may be flown from a bar using a pair of normal hook clamps.
