Configuration and Programming
P/N 06-237041-001 3-17 February 2011
FOOTNOTES (Figure 3-18:
7 Fixed Settings. Change an Ionization Detector’s Pre-Alarm and Alarm Thresholds.
Purpose: To change the pre-alarm and alarm thresholds of one or more ionization detectors. The
ionization detector is UL Listed and FM Approved for alarm reporting anywhere within the
obscuration range of 0.5 to 1.5 percent per foot when used for an open-area application. Alarm
thresholds can be set in 0.1 percent-per-foot increments. A pre-alarm threshold can also be set
anywhere within the obscuration range of 0.5 to 1.4 percent per foot, but must be less than the
detector's alarm threshold. Two additional alarm-reporting ranges are defined for special
applications. The in-duct range refers to detector placement in an air duct. The DH-2000 range refers
to detector placement in a DH-2000 Duct Housing with associated sampling tubes to monitor the air
in either a supply- or return-air duct. The alarm ranges for these special applications are as follows:
Ionization detectors can be automatically programmed to change alarm thresholds by time of
day if they are configured for day/night operation. The night alarm thresholds must be less than
the corresponding day thresholds.
Note: To install in Canada, and comply with ULC-S529-02 requirements:
1. The obscuration range of Smoke Detector Model CPD-7052 is 0.6% per foot or less.
2. The obscuration range of Smoke Detector Model PSD-7152 is 3.5% per foot or less.
Application Pre-Alarm/Alarm Range (%/foot)
Induct 0.5 - 1.0
DH-2000 0.5 - 1.0
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