Data Sheet for Product

Siemens
Smart Infrastructure – Building Products
–3–
usa.siemens.com/fire
Operation – (continued)
Field-Device Programmer / Test Unit
Every Model OOH941 intelligent detection device is compatible with the Siemens field-device programmer / test unit
(Model DPU
| 8720), which is a compact, portable, menu-driven accessory for electronically programming and testing
these addressable detectors promptly and reliably. For instance, the field technician selects the accessory’s program mode,
and enters the desired address.
Model DPU
| 8720 eliminates the need for cumbersome, unreliable mechanical programming methods (e.g. – dials and
rotary switches), and reduces installation and service costs by electronically programming and testing the detector prior to
installation. When set in `test’ mode, Model DPU | 8720 will perform a series of diagnostic tests without altering the
address or other stored data, allowing technicians to determine if the detector is operating properly.
Each field-device programmer / test unit operates on
AC power or rechargeable batteries, providing flexibility and
convenience in the programming / testing of fire-safety equipment from practically any location.
Additionally, with the use
of a Model DPU
| 8720, there is no longer a cause for concern with any vibration, corrosion and other deteriorating
conditions that could negatively affect any electro-mechanical-addressing mechanism.
Field-selectable application profiles
Model OOH941 provides 22 user-friendly, field-selectable application profiles, identified with universally known
names (e.g.
─ hotel | Telco | office | parking garage | dormitory | data center, etc.)
Refer to installation manual
: P/N ─ A6V10324655 for a complete list and description of application profiles.
Due to generic-name classifications, no cross-reference tables are required as the application name resides in the
panel’s configuration tool. This user-friendly feature
─ along with the algorithms provided by ASAtechnology ─
provides a reliable, field-configurable detector suitable for an array of applications.
Field-selectable temperature settings
Model OOH941 provides five (5) field-selectable temperature thresholds, ranging from 135°F to 175°F (57°C to
79°C), with fixed and rate-of-rise options. These ranges provide maximum flexibility to program and to easily
adjust the temperature settings that suit multi-application needs with a building or in changing environmental
conditions.
Additionally, Model OOH941 can be configured to provide a low-temperature warning signal at 40°F (4.4°C). This
configuration (along with connection to a compatible fire-alarm control panel [FACP]) meets NFPA 72
requirements for sprinkler-temperature monitoring, and serves to prevent water freezing inside pipes, relative to
water-based suppression systems.
Ambient supervisory feature for temperature-threshold ranges
Another highlight for Model OOH941 is supervision of ambient temperatures, allowing the end user to set a
specified, unique warning point at a customized temperature threshold ranging from
-
4°F to 120°F (
-
20°C to 49
°C).
This feature is practical for monitoring of machinery; special processes, or for environments where maintaining
a temperature is critical as an early-warning supervisory signal.
Self-monitoring for smoke-sensor sensitivity
Model OOH941 provides an automatic, self-monitoring sensitivity check that complies with the NFPA 72 sensitivity
requirements. When connected with a compatible FACP, it provides automatic, dynamic sensitivity verification
within the agency-listed-and-approved limits. Besides checking for sensor integrity and automatic environmental
compensation, Model OOH941 provides a display and report of sensitivity in percent-per-foot
(or percent-per-meter) at the FACP.
Profile Overview
Each Model OOH941 intelligent detector contains one (1) tri-color LED indicator, capable of flashing any one (1)
of three (3) distinct colors: G
REEN, YELLOW, or RED. During each flash interval, the microprocessor-based detector
monitors the following:
• Smoke in its sensing chamber
• Smoke sensitivity is within the range indicated on the nameplate label
• Internal sensors and electronics