1. Introducció
This manual provides essential information for the proper installation, operation, and maintenance of the Notifier FAPT-851 ACCLIMATE Multi-Sensor. The FAPT-851 is an intelligent, addressable multi-sensor designed for use with compatible fire alarm control panels. It combines photoelectric smoke and fixed-temperature heat detection to provide enhanced fire protection and reduce nuisance alarms.
Please read this manual thoroughly before installation and retain it for future reference. Adherence to these instructions is crucial for the reliable performance of the device.
2. Informació important de seguretat
Observeu sempre les precaucions de seguretat següents:
- Installation and wiring must be performed by qualified personnel in accordance with all national and local codes and regulations.
- Disconnect all power from the fire alarm control panel before installing or servicing the sensor.
- Do not paint the sensor. Paint can interfere with proper operation.
- Test the sensor regularly as described in the Maintenance section.
- This device is not intended for use in hazardous locations.
3. Contingut del paquet
Verifiqueu que tots els elements siguin presents al paquet:
- Notifier FAPT-851 ACCLIMATE Multi-Sensor
- Installation and Maintenance Instructions (this document)

Figura 3.1: The Notifier FAPT-851 ACCLIMATE Multi-Sensor packaged in its brown cardboard box. The label on the box clearly displays 'NOTIFIER by Honeywell', 'FAPT-851', 'ACCLIMATE MULTI-SENSOR', and the UPC 0783863021138.
4. Configuració i instal·lació
4.1 Muntatge
The FAPT-851 sensor is designed for flange mounting. Ensure the mounting location complies with local fire codes and provides optimal coverage.
- Select a suitable mounting base (sold separately) compatible with the FAPT-851.
- Secure the mounting base to the ceiling or wall using appropriate fasteners.
- Align the sensor with the mounting base and rotate clockwise until it clicks into place.
4.2 Cablejat
Wiring must be performed according to the fire alarm control panel's installation manual and all applicable codes. The FAPT-851 is an addressable device and requires connection to an intelligent signaling line circuit (SLC).
- Ensure power to the SLC is disconnected before wiring.
- Connect the SLC wiring to the terminals on the mounting base as indicated in the base's instructions.
- Set the sensor's address using the rotary switches on the back of the sensor before mounting it to the base.

Figura 4.1: The underside of the Notifier FAPT-851 sensor, showing the rotary address switches and the label with model number, UL listing, and wiring information. This view is critical for setting the device address and understanding connection points.

Figura 4.2: The Notifier FAPT-851 sensor removed from its box, alongside the folded installation and maintenance instructions. This image shows the context of the manual within the product packaging.
5. Instruccions de funcionament
5.1 Funcionament normal
During normal operation, the sensor communicates with the fire alarm control panel. The LED indicator on the sensor will flash periodically (e.g., every few seconds) to indicate normal polling by the control panel. Refer to your control panel's manual for specific LED flash patterns.
5.2 Indicació d'alarma
When the sensor detects smoke or heat exceeding its programmed thresholds, it will enter an alarm state. The LED indicator on the sensor will illuminate steadily (e.g., red) to indicate an alarm condition. The control panel will also register the alarm and activate appropriate notification appliances.
5.3 Trouble Indication
If the sensor experiences a fault or malfunction (e.g., contamination, internal error), it will report a trouble condition to the control panel. The LED indicator may flash in a specific pattern (e.g., amber) or remain off, depending on the nature of the trouble. Consult the control panel's manual for trouble code interpretation.
6. Manteniment
Regular maintenance ensures the continued reliable operation of your FAPT-851 sensor.
6.1 Neteja
Dust and debris can accumulate on the sensor, potentially affecting its performance. Clean the sensor annually or as needed:
- Disconnect power to the fire alarm control panel.
- Gently twist the sensor counter-clockwise to remove it from its mounting base.
- Use a soft brush or a vacuum cleaner with a soft brush attachment to remove dust from the sensor's vents and chamber.
- Netegeu l'exterior amb una mica damp tela. No utilitzeu productes químics o dissolvents aggressivs.
- Reattach the sensor to its base by aligning and twisting clockwise until it locks.
- Restore power to the control panel and verify normal operation.
6.2 Prova
Test the sensor after installation and periodically thereafter (e.g., monthly or quarterly, as required by local codes):
- Notify appropriate personnel that the fire alarm system will be tested.
- Initiate a functional test using approved test methods (e.g., canned smoke for smoke detection, heat gun for heat detection).
- Verify that the sensor goes into alarm and the control panel registers the alarm.
- Reset the fire alarm control panel.

Figura 6.1: The Notifier FAPT-851 sensor with an orange protective cover installed. This cover is typically used during construction or painting to prevent contamination of the sensor chamber, and must be removed for proper operation.
7. Solució De Problemes
Consulteu la taula següent per veure els problemes habituals i les seves possibles solucions.
| Problema | Causa possible | Solució |
|---|---|---|
| El sensor no respon | Incorrect wiring, incorrect address, power issue, faulty sensor. | Check wiring connections, verify sensor address, confirm power to SLC, replace sensor if necessary. |
| Alarmes molestes | Dust/debris in chamber, sensor located in high-smoke/steam area, environmental factors. | Clean sensor (Section 6.1), relocate sensor if possible, adjust sensitivity settings on control panel if applicable. |
| Trouble signal on control panel | Sensor fault, communication error, contamination. | Check control panel for specific trouble code, clean sensor, verify wiring, replace sensor if fault persists. |
8. Especificacions
Technical specifications for the Notifier FAPT-851 ACCLIMATE Multi-Sensor:
| Característica | Detall |
|---|---|
| Número de model | FAPT-851 |
| Fabricant | HONEYWELL |
| Material | Metall, plàstic |
| Tipus de muntatge | Muntatge de brida |
| Precisió de la mesura | ±1.5°C (for heat detection) |
| Dimensions del paquet | 4 x 4 x 2 polzades |
| Estil | Clàssic |
9. Garantia i Suport
For information regarding the product warranty, please refer to the documentation provided with your fire alarm control panel or contact Notifier customer support directly. Notifier provides technical support and resources to assist with installation, operation, and troubleshooting.
For technical assistance or to report issues, please visit the official Notifier website or contact your authorized Notifier distributor.





