Operating Precautions; Introduction; Installation - RCF PL70BS Instructions D'installation Et D'emploi

2. Operating precautions

• Do not use solvent, alcohol, benzene, or other vola-
tile substances for cleaning the external parts of the
speaker.
• Do not use the speaker in tropical climates.
• If the speaker is used in particulary could places,
drive it with a low signal for 5-10 minutes before
using it at maximum power.

3. Introduction

The PL 70 BS ceiling speaker, equipped with a fire
protection steel base, can be installed flush-mounted
in false ceilings or panels. It is particularly suitable
for reproducing alarm messages, as it provides parti-
cularly intelligible voice reproduction and is resistant
to the high temperatures that can be reached during
a fire. The PL 70 BS has the following main features.
• High quality voice reproduction.
• Dual cone loudspeaker, diam. 160 mm (6"), fea-
turing a broad frequency response and broad disper-
sion.
• Transformer for connection to constant voltage
lines (70 V / 100 V).
• Possibility to select the output power from
among several values.
• Steel construction, with metal protection grille.
• Fire protection steel base with an attachment
system that ensures quick installation.
• Two ceramic terminal strips for connecting the
input and output cable (IN/OUT).
• Support for connection terminals can be removed
from the base to facilitate making connections.
• Possibility to complete the connection of the
audio line to the terminal strip of the base without
having to install the loudspeaker.
• Quick system for hooking the speaker to the base
by means of two springs.
• Earth screws.
• Fire protection internal cables.
• Thermic fuse that prevents damage to the audio
line due to heat on the speaker

4. Installation

WARNING: Make sure that the speaker is
installed in a stable and secure way in
order to avoid any conditions that may be
dangerous for persons or structures.
Check to make sure that the support surface (e.g.
wall, etc.) has the necessary mechanical characteri-
stics to support the weight of the speaker without the
danger of it falling.
Before suspending the speaker, carefully check all
the components to be used to make sure that there is
no damage, deformation, corrosion and/or missing or
damaged parts that could reduce the safety of the
installation.
In outdoor use, avoid installing the speaker in pla-
ces exposed to harsh weather conditions.
The PL 70 BS is designed for flush-mount installa-
tion in false ceilings. Before installing the speaker,
make sure that there is sufficient space behind the
false ceiling panel to hold the speaker: with respect
to the support surface of the front flange of the
speaker, a free space of 125 mm (4.92") depth is
necessary.
1. Drill a hole of diameter 202 mm (7.95") in the
false ceiling panel, as shown in Figure 2 on page
27.
2. Loosen the two wing bolts A (Fig. 1, page 27) that
secure the two attachment plates B (Fig. 1) and
move the plates upward; then secure the two pla-
tes B by retightening the two wing bolts A.
3. Insert the fire protection base in the hole previou-
sly drilled, as shown in Figure 2 on page 27.
4. Loosen the two wing bolts A again and move the
two attachment plates B downward, as shown in
Figure 3 on page 28, to secure the base to the
false ceiling. When this operation is completed,
retighten the two wing bolts A.
5. Hang the speaker onto the base, fitting the ends
of one of the two support springs C on the speaker
into one of the hooks D on the base, as shown in
Figure 4 on page 28.
6. Make the electrical connections as described in
the section below.
7. Fit the ends of the other support spring C to the
second hook D on the base.
8. Push the speaker into the base until the front flan-
ge lays against the false ceiling.
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