Prella PLH-24V Installation Wiring Diagram

TYPICAL WIRING DIAGRAM

Figure 1(a) shows the typical wiring diagram of the
multiple-station smoke detector system.
4
3
2
The wiring diagram of 2/3 wired LED remote indication
Do not place links between terminals 1,2 and 4,5 to provide wire
continuity monitoring
Figure 1(b) shows the typical wiring diagram of the
4-wire multiple-station smoke detector system.
4
3
2
4 Wired Normally Close Wiring Diagram
4
5
3
1
2
4 Wired Normally Open Wiring Diagram
DO NOT PLACE LINKS BETWEEN THE WIRING POSITIONS
OF TERMINALS 2 AND 4, 5 TO PROVIDE POWER
SUPERVISION
Note: relay and the remote indicator could not
be used at the same time
WARNING
TO PREVENT DETECTOR
SUBSEQUENT WARRANTY
SMOKE DETECTOR MUST REMAIN COVERED UNTIL
THE AREA IS CLEAN AND DUST FREE.

INSTALLING THE BASE

1. To insure proper installation of the detector head to the
base, all the wires should be properly addressed at
installation:
(A) Position all the wires flat against terminals.
(B) Fasten the wires away from connector terminals.
2. If you use a jumper wire to connect the poles of
terminal 2 and 3, 4 when testing the detector loop
continuity, be sure to remove the jumper wire prior to
the installation of the detector head.
PLH-24V
Installation Wiring Diagram
REMOTE LED
INDICATOR
4 4
5 5
3 3
1 1
2 2
4 4
5 5
3 3
1 1
2 2
4 4
5 5
3 3
1 1
2 2
CONTAMINATION
CANCELLATION,
Conventional Heat Detector
3. The end-of-line device shown in fig. 1(a) and 1(b)
should be compatible with the control unit. The
end-of-line supervisory relay used should be rated for
the DC power voltage used.
4. Open area smoke detectors are intended for mounting
on a ceiling or a wall in accordance with the fire
standard in your country.
5. The base of the smoke detector can be mounted
directly onto an electrical junction box such as an
5
octagonal (75mm, 90mm or 100mm), a round (75mm),
or a square (100mm) box without using any type of
1
mechanical adapter.

INSTALLING THE HEAD

1. Align the components as shown in Figure 2.
2. Mate the detector head onto the base and twist
clockwise to secure it.
3.
Do not install the detector head until the area is
thoroughly cleaned of construction debris, dusts, etc.
5
1
Fig. 2 Mating detector head onto base
Note: relay output of the device is fully isolated (Dry)
The following requirements are for which with
relay output:
Rated load of relay:

TESTING

1.
All the alarm signal services, releasing device and
extinguisher system should be disengaged during the
test period and must be re-engaged immediately at the
conclusion of testing.
AND
2. After energizing the detector head for approximately
THE
one minute, check to see the indicator red LED
flashing once every 30 seconds. If red LED fails to
flash, it indicates the non-functioning of the detector or
faulty wiring. Re-check the wiring or replace the
detector if necessary.
LED
DETECTOR HEAD
SHORT ALIGNMENT MARK
LONG ALIGNMENT MARK
1A@30VDC,
0.5A@125VAC
BASE