SIEMENS OP121 Photoelectric Smoke Detector and Photo Smoke-Thermal Detector Instruction Manual
- June 9, 2024
- SIEMENS
Table of Contents
Installation Instructions
Models OP121/OH121
Photoelectric Smoke Detector and Photo
Smoke/Thermal Detector
These instructions are written in accordance with the installation guidelines of NFPA No. 72, National Fire Alarm Code, and CAN/ULC-S524, The Installation of Fire Alarm Systems.
DETECTOR PLACEMENT
For a clear air, 0 to 4000 ft/min velocity application, use 30 foot center
spacing (900 sq ft) from NFPA Standard 72 initiating devices chapter and
CAN/ULC-S524 as a starting point for a detector installation layout. This
spacing, however, is based on ideal conditions – smooth ceiling, no air
movement, and no physical obstructions. In some
applications, considerably less area is protected adequately by each smoke
detector. In all installations, place the detector on the ceiling, a minimum
of 6 inches from a side wall, or on a wall, 6 inches from the ceiling.
Follow the drawings provided or approved by Siemens Industry, Inc. or by its
authorized distributors. See NFPA 72, National Fire Alarm Code, initiating
devices chapter for
additional guidance on special issues such as beamed construction and high
stockpiling.
TO AVOID NUISANCE ALARMS:
DO NOT
locate the OP121/OH121 detector where excessive smoke concentrations exist
under normal conditions, or in areas of prolonged high relative humidity where
condensation occurs.
DO NOT locate the OP121/OH121 detector next to an oil burner, kitchen, or
garage where exhaust fumes can trigger an alarm. Other causes of false alarms
are dust accumulation, heavy concentrations of steam, heavy pipe or cigar
smoke, and certain aerosol sprays.
AIR CURRENTS
Before a detector can sense a fire, the products of combustion or smoke must
travel from the fire to the detector. Since their travel is especially
influenced by air currents, consider the movement of air in the design of the
system.
While combustion products tend to rise, drafts from hallways, air diffusers,
fans, etc., may help or hinder the travel of combustion products to the
detector. When positioning detector at a particular location, give
consideration to windows and doors, both open and closed, and to influencing
air movement. Never install a detector in the air stream of a room air supply
diffuser. It is better to position a detector closer to an air return.
SPECIFICATIONS
Environmental
Operating Temperature (Model OP121): 32°F (0°C) to 120°F (49°C)
Operating Temperature (Model OH121): 32°F (0°C) to 100°F (38°C)
Humidity: Up to 95% RH, non condensing
Air Pressure: No effect
Air Velocity: 0 to 4000 fUmin. For open area protection and direct air duct
application.
Thermal Alarm Temp. (Model OH121): 135°F (57°C)
UL listed with STI Mechanical Protection Guard Model: STI-9604
(see www.STI-USA.com for details)
Electrical
| Voltage: | 16-27 VDC |
|---|---|
| Ripple: | 3V peak-to-peak |
| Supervisory Current: | 100μA max |
| Alarm Current: | 30-50mA |
| Start-up Time: | 30 seconds max |
DETECTOR WIRING
The OP121/OH121 should be connected as shown in Figure 3 using the separate
mounting base, Model DB-11. Follow the control panel wiring connection drawing
installed on the inside face of each control panel cover. See DB-11
instruction, P/N 315-094193, for base mounting. Duplicate wiring information
is also in the Installation, Operation, and Maintenance Manual provided with
every control panel. Note any limitations on the number of detectors and
restrictions on the use of remote devices permitted for each circuit.
WARNING: CONNECT DETECTOR ONLY TO CIRCUITS SPECIFIED IN DETECTOR AND
PANEL LITERATURE OR SYSTEM MAY NOT OPERATE.
CAUTION:
- Do not use looped wire under base terminal 5. Break wire run to provide supervision of connection.
- When a remote relay is used to control a critical system function, the relay and its associated detector and optional module(s) must be the ONLY devices on the initiating circuit.
INSTALLATION / REMOVAL OF DETECTOR
TO INSTALL:
- Rotate detector counterclockwise while gently pressing on it until the detector drops fully into base.
- Then rotate the detector clockwise until it stops and locks in place. Insert optional locking screw (Order Model LK-11).
TO REMOVE:
- Loosen locking screw, if installed. Then rotate the detector counter clockwise until stop is reached.
- Pull detector out of base.
LED INDICATOR OPERATION
The OP121/OH121 contains an LED indicator capable of flashing either one of
three distinct colors: green, yellow, or red. The microprocessor based
detector monitors the
following:
- Smoke in its sensing chamber
- Smoke sensitivity is within the range indicated on the nameplate label (sensitivity verification)
- Internal sensors and electronics
Based on the results of these checks, the LED indicator flashes as follows:
| Flash Color | Flash Interval (Seconds) | |
|---|---|---|
| Green | Normal supervisory operation. Smoke sensitivity is within rated limits. |
Double blinking first 3 min after power up or reset. Single blinking after the
first 3 min.| 10
Yellow| Detector is in trouble and needs replacement| 5
Red| Alarm| 2½
No Flashes| Detector is not powered or replacement is needed.|
TESTING AND MAINTENANCE
To assure proper operation of the detector and control panel, it is required that both the Sensitivity test and the Functional test be conducted using the procedures outlined below.
TESTING AND MAINTENANCE
To assure proper operation of the detector and control panel, it is required
that both the Sensitivity test and the Functional test be conducted using the
procedures outlined below.
FUNCTIONAL TEST
To test the detector and control panel for functional operation, use SIEMENS
Test Gas, P/N 500-649750. Follow the instructions on the gas canister label.
Smoke entry test mode: To test the detector for smoke entry, place the
detector into a test mode. The test mode condition is automatically started
after the initial power up and after every reset for a period of 3 minutes. It
is recommended that a control panel reset be performed after every smoke entry
test is conducted to restart the 3 minute test period. The test mode is
indicated when the green LED is double blinking every 10 seconds. A normal
operational mode is indicated
(after 3 minutes) when the green LED is a single blink every 10 seconds. The
test mode provides a reduced test time period and utilizes less concentration
of test gas or aerosol.
Detector and control panel functionality can also be tested using the TM121
test magnet as shown in Figure 4 for the OP121 detector and Figure 6 for the
OH121 detector. Place the magnet in the specific area at the bottom of the
detector that is shown in Figure 5 for the OP121 detector and Figure 7 for the
OH121 detector for at least 5 seconds with the colored side towards the
centered LED. The detector will send an alarm to the panel.
WARNING: Testing with the magnet only tests the circuit; it does not test
the detector’s sensing ability.
WARNING: The TM 121 test magnet is a strong magnet that can be harmful to
pacemaker wearers and to those with medical implants. Keep the magnet away
from magnetic media such as credit cards and memory disks/chips.
CAUTION: UNDER NO CIRCUMSTANCES IS THE DETECTOR HEAD TO BE DISASSEMBLED.
NO REPAIRS OR CLEANING SHOULD BE ATTEMPTED.
DO NOT PAINT
The detector/base plastic is marked DO NOT PAINT. This is intended to prohibit
painting during routine maintenance of the occupancy which can affect proper
operation of the detector.
COMPATIBLE CONTROL EQUIPMENT
| Equipment Compatibility Identifier | Installation/Wiring Instructions |
|---|
SXL-EX
SZM (FS-250C)| P/N 315-095997-8
P/N 315-034850C-4
The detector model number is the compatibility identifier.
Siemens Industry, Inc.
Building Technologies Division
Florham Park, NJ
Siemens Canada Limited
Building Technologies Division
2 Kenview Boulevard
Brampton, Ontario L6T 5E4 Canada
firealarmresources.com
References
- Fire Alarm Resources | Download fire alarm documents
- Security & Safety Device Protection | Safety Technology International
- Security & Safety Device Protection | Safety Technology International