Blizzard Enclosure User Manual
page 23
Split or Common Supply Wiring
IMPORTANT: Tempest enclosures with any generation of DEC control MUST be powered
24/7, in order to protect equipment from condensation and temperature extremes.
The AC power feed must be adequate and appropriately fused/protected for the greater of the
projector load (see manufacturer’s instructions) and the Tempest enclosure (see enclosure
manual).
Since the enclosure heater(s) never operate when the projector lamp is on, it is NOT
necessary to rate the power service for the SUM of the enclosure and the projector.
Common Feed operation (factory default)
Tempest Enclosures are normally supplied wired for common electrical supply for the enclosure
(DEC3.2) and the projector/light fixture to be enclosed.
Connect incoming power to the terminals labeled MAINS:
(E) Earth/Ground (L) Live
(N) Neutral
Split Feed Operation
Split Feed allows you to run the projector/light fixture independently of the enclosure.
The
enclosure must be powered 24/7.
DEC3.2 normally ships from the factory with circuit card power links in place for a common
electrical supply to feed the enclosure and the projector/fixture inside it.
To feed the enclosure and projector separately, you will
need to remove the bridging links on the controller
circuit board as shown in the illustration, before
connecting to mains power.
Use a pair of small side cutters to cut the bridging links
from the circuit board, taking care to not damage any
tracks on the card.
When splitting the feeders, we strongly recommend
feeding both supplies from the same phase and at the
same supply voltage.
Feeds must be adequately dimensioned and fused for the loads used.
Connect incoming enclosure power to the terminals labeled MAINS. This supply MUST be
maintained 24/7.
(E) Earth/Ground (L) Live
(N) Neutral
Connect incoming projector power to the terminals labeled SPLIT:
(E) Earth/Ground (L) Live
(N) Neutral
