System Sensor 6424 Projected Beam Type - Manual (Page 9)

4 RED LEDs USED
FOR ALIGNMENT
GREEN: FLASHES APPROXIMATELY EVERY
2 SECONDS IF POWERED UP AND
SENSING A SAFE CONDITION.
YELLOW: TURNS ON WHILE A TROUBLE
CONDITION EXISTS.
RED: TURNS ON IF AN ALARM
CONDITION IS SENSED.
LATCHES ON UNTIL RESET.
NOT USED
RECEIVER:
TRANSMITTER:
C0550-00
Figure 17. Alignment adjust pot (receiver only):
ALIGNMENT LEDs
ALIGNMENT ADJUST POT
(RECEIVER ONLY)
MAX. MIN.
C0551-00
CAUTION
The clear protective film and warning label on the smoked
lens of both the receiver and transmitter MUST be removed
before they can operate.
The alignment of the 6424 is divided into three steps:
alignment setup, alignment of the transmitter, and align-
ment of the receiver. It is necessary for all three steps to
be executed properly to ensure proper alignment of the
product. If the 6424 is mounted to a recommended surface
(see MOUNTING LOCATIONS) and alignment procedures
are executed properly, false alarms and nuisance trouble
signals will be avoided. The alignment procedure is best
accomplished by two individuals. This allows the adjust-
ment of the gain pot on the receiver during alignment of the
transmitter without the need for several trips back and forth
between the transmitter and receiver.
A) ALIGNMENT SETUP:
1) At the transmitter, select the proper range using the
range selection switch (SW2) on the transmitter.
Short Range (S): 30 to 100 feet
Long Range (L): 100 to 330 feet
2) If the transmitter is directly wired to the receiver (Figure
7), slide the alignment switch (SW1) on the transmitter
to the A (align) position (see Figure 15). Point the trans-
mitter directly at the receiver, then go to step 5.
3) If the transmitter is wired directly to a power supply, it
should be temporarily wired to the receiver if possible
(see Figure 8). NOTE: Temporarily wiring the transmit-
ter to the receiver is beneficial because it activates the
alignment LEDs on the transmitter to allow alignment
of the transmitter without having to look at the align-
ment LEDs on the receiver.
4) If the transmitter is not wired directly to the receiver,
make sure the SW1 switch remains in the N (normal)
position (see Figure 15) before going to step 5. Point
the transmitter directly at the receiver.
5) At the receiver, select the proper sensitivity using the
switch on the back of the receiver (see Figure 14). The
sensitivity selected depends on the separation of the
transmitter and receiver. The sensitivities and ranges
shown are in accordance with UL standard 286, Smoke
Detectors for Fire Protective Signaling Systems.
SENSITIVITY DISTANCE
30% 30 to 92 feet
30% or 55% 92 to 178 feet
(30% is more sensitive)
55% 178 to 330 feet
6) Using a small standard screwdriver, make sure the align-
ment adjust pot on the receiver (see Figure 17) is turned
fully counterclockwise, looking at it from the bottom
(maximum gain). The alignment adjust pot changes the
gain of the amplifier to compensate for differences in
separation between the receiver and transmitter and has
no effect on the detector sensitivity.
7) Turn on power to the system.
8) Slide the alignment switch on the receiver to A (see
Figure 14). The yellow trouble LED should light to
D400-18-00 9 I56-494-13R
PRINTED IN MEXICO