Bosch 8-Dec - Manual (Page 239)

Detectors and Accessories | Smoke | 231
F220 Photoelectric Smoke
Detectors
Features
▶ Two-wire or four-wire bases
▶ 30 ft (9 m) maximum spacing between detectors
▶ Optional CO-sensor, heat-sensor enhanced detection
chamber
▶ Clean chamber without removal or disassembly
▶ CleanMe
® signaling capability
▶ Sensitivity readout on detector
▶ Detector chamber compensates for dust build-up
▶ Tamper protection
▶ Dual-color LED
The F220 Photoelectric Smoke Detectors are UL Listed,
open-area photoelectric smoke detectors. Use them with
commercial fire protective signaling systems and household
fire warning systems (see NFPA 72, the National Fire Alarm
Code). These smoke detectors scatter light using a pulsed
infrared source operating with a gated, high-speed,
photodiode infrared sensor. The symmetry of the optical
chamber allows 360° uniform smoke entry, but minimizes
external light entry. The detectors use low current
electronic circuitry, so they can connect to 12 VDC nominal
or 24 VDC nominal power source circuits.
Functions
Compatible Bases
Configure the detectors into two-wire or four-wire versions
by selecting the appropriate mounting base. These
detectors are compatible with any of the F220‑B6 bases:
• F220-B6 12/24 VDC Two‑wire Mounting Base
•
F220-B6R Standard 12/24 VDC Four‑wire Mounting
Base
• F220-B6RS 24 VDC Four‑wire Mounting Base with
Sounder
• F220-B6C 12/24 VDC Four‑wire Mounting Base with
Auxiliary Relay
•
F220-B6E 12/24 VDC Four‑wire Power Supervision
Mounting Base
•
F220-B6PM 24 VDC Four‑wire Addressable Master Base
•
F220-B6PS 12/24 VDC Four‑wire Addressable Base
Monitoring the Detection Chamber
These detectors have several features that work together to
maximize the performance of the optical chamber:
•
Compensation: The detector monitors the chamber for
the effects of dust build-up within the chamber and
automatically compensates for these effects. If the
chamber becomes contaminated beyond its ability to
compensate, the green LED flashes every 4 sec to
indicate trouble.
•
Chamber Check® Self-diagnostics: The detector
automatically indicates visually if the calibration is out
of the factory-listed range. This meets NFPA guidelines
for sensitivity testing, because you can visually inspect
the detector and check the flash rate of the LED. If the
calibration is out of range, the green LED on the
detector flashes once every 4 sec. This indicates that
the detector must be cleaned following the instructions
provided with the detector.
•
CleanMe Mode: Indicates if the calibration is out of the
factory-listed range by sending a trouble signal to the
CleanMe-compatible control panel, if so programmed.
•
Chambermaid™: The detector has a unique cleaning
mechanism. Use the valve on the back of the detector
to insert the nozzle of a can of clean, dry compressed
air. Clean the chamber with a short (1 to 2 sec) blast of
air.
Heat and Carbon Monoxide Enhancements
The detectors are available with an optional fixed-
temperature heat sensor, a carbon monoxide (CO) sensor,
or a combination of heat and CO sensors. These optional
sensors enhance the operation of the smoke detector by
reducing false alarms.
•
Carbon Monoxide: Without the presence of CO, a
normal byproduct of combustion, the detection
chamber is half as sensitive to smoke as a standard
commercial photoelectric smoke chamber. This
reduces false alarms. When the sensor detects CO, the
detection chamber's sensitivity to smoke increases so
it equals or exceeds that of a standard commercial
photoelectric smoke chamber.
Note The F220-PTHC detects carbon monoxide (CO)
as a component of a fire. It is not a CO detector
and cannot activate an alarm in the presence
of CO only.
•
Heat: When the heat sensor detects a temperature rise,
the photoelectric chamber becomes more smoke
sensitive. The heat sensor initiates an alarm if the
ambient temperature exceeds +135°F (+57°C).
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