Siemens System 3 Manual page 19

Section III — Equipment Descriptions and Functions
6.1 BASE SEAL for DB-3S or DB-11 BASE
Use the DB-Seal with a DB-3S base or the DB-11 Seal with a DB-11 base to prevent moisture from
condensing and collecting on the rear of the detector used. This moisture can occur when units experi-
ence different temperatures or humidity conditions.
INSTALLING the DB-SEAL for DB-3S BASE
(See Figure 4)
All wiring must comply with national and local
codes.
1. Install and wire the DB-3S base by following
the DB-3S Installation Instructions
(P/N 315-083225). Make sure that all wires
are dressed flush to the bottom of the base.
2. Position the tabs on the seal over the slots in
the inner rim of the base and press the seal in
place.
3. Check that the four openings for the spring
contacts clear the springs and the plastic
terminal supports.
4. With the seal in place, install the detector.
5. Follow the checkout procedure in the detector
installation instructions.
Installing the DB-Seal
14
Figure 4
INSTALLING the DB-11 SEAL for DB-11 BASE
(See Figure 5)
All wiring must comply with national and
local codes.
1. Install and wire the DB-11 base by following
the DB-11 Installation Instructions
(P/N 315-094193). Make sure that all wires
are dressed flush to the bottom of the base.
2. Place the base seal (1/4" white foam) firmly
into the bottom of the base. Do not cover the
contact springs (See Figure 5.)
3. Rotate the detector counterclockwise while
pressing on it until the detector drops into the
base.
4. Rotate the detector clockwise until it stops
and locks in place.
Figure 5
Installing the DB-11 Seal