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