Sensing Compartment Cover Installation
a
.
Install the cover gasket (Figure 3, 16) on the housing, if not already installed. Be certain the
alignment holes in the cover gasket are aligned with the guides on the housing.
b.
Install the sensing compartment ionization cover (20) when using DI-B3 or DI-B3H (15)
detectors and the PE-11 cover (17) when using an PE-11 detector (14).
c.
Fasten the cover, using the No. 6 screws (18) provided. Tighten snugly, but not so tightly as
to warp cover and cause air leakage around the edges of the cover.
Sensitivity Testing
Test at least as frequently as required by the
Installation and Test Requirements of NFPA
72
.
a.
Siemens Building Technologies, Inc. smoke detector sensitivities are factory set and are
not
field adjustable. The sensitivity range, as measured with the appropriate sensitivity
meter, is listed on the nameplate label on the wiring compartment cover.
b.
To ensure that the sensitivities are within factory-specified limits, sensitivity testing of the
smoke detectors should be accomplished by qualified service personnel only.
c.
The SA-3I provides access to the detector sensitivity test jack through the sensing compart-
ment cover. Access the test jack by lifting up the hinged lid (Figure 3, 21) and inserting the
plug. For further information on testing the DI-B3 and DI-B3H detectors, refer to the
TM-I3
Instructions,
P/N 315-086641.
d.
The PE-11 detector monitors smoke sensitivity automatically and requires no test equip-
ment. A green flash of the detector LED about every seven seconds indicates that the
smoke sensitivity is within it listed limits.
MAINTENANCE
The performance of the air duct detector unit may be adversely affected by dirt or foreign matter
on the sampling tubes or detector. If the air holes in the inlet sampling tube become restricted,
the unit cannot receive a proper air sample, and performance is impaired. It is recommended
that the sampling tubes be checked and cleaned periodically. The detector maintenance program
should consist of periodic cleaning of dust from the detector head by a light brushing of all open
slots and by using a vacuum cleaner. For cleaning of Model PE-11, refer to the Installation
Instructions, P/N 315-094198.
The cleaning and test program is recommended for six month intervals, or more frequently,
if needed, depending on the individual detector environment.
CAUTION:
Under no circumstances is the ionization or photoelectric detector portion
of the unit to be disassembled by anyone other than an authorized
Siemens Building Technologies, Inc. Systems Technician. For service,
contact your nearest authorized Siemens Building Technologies, Inc.
Service Representative.
Periodic Testing
It is recommended that the unit be tested periodically to insure optimum performance. This can be
done by removing the sealing plug from the inlet sampling tube on the opposite side
of the duct and blowing smoke directly into the inlet tube. Check that the fire alarm system is
activated.
CAUTION:
If the fire alarm system is connected to a central station or fire department,
or has external devices such as fans, extinguishers, etc., connected,
notify appropriate personnel and disconnect the external devices until all
tests are completed. After testing, reset the system by using the Reset
key, reconnect the devices and notify the personnel that the system is
again operating.
P/N 315-096274-2
