Specifications

FTB 312-4 Revision 4 – 1-8-2008 11
3. Ensure that only the bottom of the
case has drain holes and that they
are clear.
4. Ensure that no holes are punched
or drilled on the top surface of the
case.
5. Ensure that air can flow around the
case.
6. Mount the power converter away
from radio frequency interference
(RFI).
4. Power Converter Wiring. Examine the
installation drawings and use the
following checks:
1. Check for proper incoming service
voltage.
2. Wire each unit according to the
instructions.
3. In multiple installations of three
systems, all three power converters
should be on the same breaker.
4. Check all electrical connections for
tightness.
5. Check all terminal strip
connections for tightness.
6. Ground the power converter.
7. Wires at master/slave interconnect
terminals should be daisy-chained
as a twisted pair between the
master power converter and the
slave units. The rate of twist is 12
per foot. If a shielded cable is used,
ground the shield. For example,
ensure that TB1-4 is connected to
all TB1-4 connections on all units,
and TB1-5 is similarly connected.
5. Alarm Wiring.
1. If external alarm detection circuit
responds to closed contacts, ensure
that they are wired to the contacts
on TB1 that close on alarm.
2. If external alarm detection circuit
responds to open contacts, ensure
that they are wired to the contacts
on TB1 that open on alarm.
3. Alarm wiring should be lightning
and RFI protected: shielded,
grounded shield, and in a conduit.
4. If a specific alarm is ganged
together from all power converters
as one, ensure that the wiring
follows local installation
instructions.
6. Flashhead Mounting.
1. Ensure that the flashhead lens can
be opened without striking other
objects.
2. Level and aim the flashhead.
7. Flashhead Wiring.
1. Protect the top flashhead against
lightning strikes.
2. Ground the flashhead.
3. Check the wiring of the flashhead
cable to the flashhead.
4. Secure the flashhead cable to the
tower. Support and tape the
flashhead cable to prevent its
movement by the wind.
8. Photocell.
1. Locate photocell where it views
unobstructed polar sky with no
direct or reflected artificial lighting
striking it.
2. Mount the photocell vertically to
prevent water from entering the
unit. Ensure watertight
connections.
3. Connect the photocell to the master
power converter.
After completing all the steps listed above,
turn on the power and perform an
operational checkout from procedures in
Section 3 of this manual.