Flash Technology FTB 312-3, Reference Manual

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2-4 Revision13 — 02-20-2001 FTB 312 and FTS 316
FTS 316-2 and FTS 316-3 DC Back-Up
Power Source
Use the installation drawings in this manual in
Figure 2-6 and Figure 2-12 or site installation
drawings.
The FTS 316 systems switch from AC power lines
to a DC back-up power source if the AC power
fails. These systems use a 24 VDC battery
back-up power source. Mount the batteries and
the voltage inverters closely together to keep the
battery cables as short as possible. Use braided
battery cables of a gauge determined by their
length as shown in Figure 2-13 or Figure 2-14.
Use soldered-lug battery connectors on the cable.
Alarm Relay Wiring
The wiring for alarm relay connections in Figure
2-15 minimizes the possibility of damage caused
by high voltage transients.
Installation Checklist
Complete the following steps before applying
power to the lights.
1. Inspect all equipment for damage.
2. Verify the received equipment against the
packing list to ensure completeness.
3. Power Converter Mounting:
Position and mount each unit correctly, allow-
ing adequate clearance for opening the covers.
Use the following checks:
•
Ensure that the case is mounted upright,
is water tight, and grounded.
•
Check hardware inside the case to ensure
that the mounting screws and nuts are
tight.
•
Ensure that only the bottom of the case
has drain holes and that they are clear.
•
Ensure that no holes are punched or
drilled on the top surface of the case.
•
Ensure that air can flow around the case.
•
Mount the power converter away from
radio frequency interference (RFI).
4. Flashhead Mounting
•
Ensure that the flashhead lens can be
opened without striking other objects.
•
Level and aim the flashhead.
5. Photocell Mounting
•
Locate photocell where it views unob-
structed polar sky with no direct or
reflected artificial lighting striking it.
•
Mount the photocell vertically on the top
end of a vertical length of conduit to pre-
vent water from entering the unit.
6. Marker Mounting (Sidelights):
•
Ensure that marker junction boxes are
mounted with the weep holes down.
•
Ensure that the junction boxes are water
tight.
7. Power Converter Wiring
Examine the installation drawings and use
the following checks:
•
Check for proper incoming service voltage.
•
Wire each unit according to the instruc-
tions.
•
In multiple installations, all power con-
verters must be wired to the same electri-
cal phase. Wire all three power converters
to one 20-amp. circuit breaker.
•
Check all electrical connections for tight-
ness.
•
Check all terminal strip connections for
tightness.
•
Ground the power converter.
•
Wires at TB1-4 and TB1-5 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.
Ensure that TB1-4 is connected to all
TB1-4 connections on all units, and TB1-5
is similarly connected.