Siemens OP121/OH121 photoelectric smoke and photo smoke/thermal detector installation instructions covering placement, wiring, configuration, testing…
The Siemens OP121/OH121 installation instructions describe the OP121 photoelectric smoke detector and OH121 photo smoke/thermal detector, which are UL268 7th edition listed. The document covers air currents, detector placement, sensitivity and environmental specifications, and ways to avoid nuisance alarms.
It also explains wiring with the DB-11 mounting base, detector mounting and removal, LED indicator operation, configuration with the magnetic switch, testing and maintenance, compatible control equipment, and FCC statements.
| Sensitivity, OP121 open area | 3.765 ±0.235 %/FT |
|---|---|
| Sensitivity, OP121 duct | 1.815 ±0.145 %/FT |
| Sensitivity, OH121 open area | 3.845 ±0.325 %/FT |
| Sensitivity, OH121 duct | 2.575 ±0.265 %/FT |
| Operating temperature | 32 °F (0 °C) to 100 °F (38 °C) |
| Humidity | Up to 95 % RH, non-condensing |
| Alarm temperature, OH121 | 135 °F (57 °C) |
| Voltage | 16-27 VDC |
| Alarm current | 30-50 mA |
| Wire size | Maximum 14 AWG; minimum 18 AWG |
The OH121 alarm temperature is 135 °F (57 °C).
Use maximum 14 AWG and minimum 18 AWG; wire larger than 14 AWG can damage the connector.
The listed test gases include Smoke Sabre, Smoke Centurion (M8), Solo A5, Solo A10, Testifire 1001/2001, HSI PurCheck, and HSI SmokeCheck.
For air duct applications, set the detector parameter to "Duct" using the magnetic switch after startup is finished.