Silent Call Gentex 9120FT - Manual (Page 4)

Important Notice:
These materials have been prepared by Gentex Corporation ("Gentex") for informational purposes
only, are necessarily summary, and are not purported to serve as legal advice and should not be used
as such. Gentex makes no representations and warranties, express or implied, that these materials
are complete and accurate, up-to-date, or in compliance with all relevant local, state and federal laws,
regulations and rules. The materials do not address all legal considerations as there is inevitable
uncertainty regarding interpretation of laws, regulations and rules and the application of such laws,
regulations and rules to particular fact patterns. Each person's activities can differently affect the
obligations that exist under applicable laws, regulations or rules. Therefore, these materials should be
used only for informational purposes and should not be used as a substitute for seeking professional
legal advice. Gentex will not be responsible for any action or failure to act in reliance upon the
information contained in this material.
Architect & Engineering Specifications
The Photoelectric Smoke alarm shall be a Gentex Model 9120/9123/9220/9223 or approved equal which shall provide at least the
following features and functions.
1. Nominal sensitivity shall be 2.5%.
2. The alarm shall utilize an infrared LED sensing circuit which pulses in 4 to 5 second intervals when subjected to smoke. After 2
consecutive pulses in smoke, the alarm will activate.
3. The alarm shall have a 9VDC alkaline battery as a back-up in the event building power is lost.
4. The 9VDC battery impedance shall be verified by the circuit of the smoke alarm.
5. The alarm shall provide an indicator when the battery is low in power or high impedance or is missing.
6. The alarm shall provide minimum 5-to-1 signal-to-noise ratio in the optics frame to assure stability of operation in environments
of high RF and transient conditions.
7. The sensing chamber shall be fully screened to prevent entrance of small insects, thus reducing the probability of false alarms.
8. A solid state piezo alarm rated at 90dBA at 10ft.
9. A visual LED monitor (condition indicator) will slow pulse in normal operation and rapid pulse in alarm.
10.An easily accessible test knob shall be provided. The test knob in the TEST position will simulate an actual smoke condition of
approximately 3.5% causing the detector to alarm within 20-36 seconds. It will also have the capability of testing to 0.85% as a
required minimum. A magnetic switch closure or other switch closure, or smoke generating equipment which does not scatter
the light beam or test sensitivity is not sufficient, as indicated in National Code.
11. The detector shall have interconnect capabilities of up to 12 units or 6 units with relay.
12.The alarm shall have interconnection capabilites of 12 units on 9120/9120T/9120H/9123/9123T/9123H/9220/922T/9220H/9223/
9223T/9223H and shall have interconnection capabilites of 6 units on 9120F/9120TF/9120HF/
9123F/9123TF/9123HF/9220F/9220TF/9220HF/9223F/9223TF/9223HF.
13.The manufacturer shall provide other compatible alarm models with the following optional features: a) 135°F isolated thermal
with normally opened contact for remote connection to local alarm or annunciator; b) 135°F integral thermal; c) auxiliary Form
A/Form C relay contacts for initiating remote functions and annunciation; d) relay option that is capable of activation by tandem
interconnect wire. Thermal sensor shall be self-restoring.
14.Unit must be UL 217 and UL 1730 listed for both wall and ceiling mount.
15.Unit shall be listed by Underwriters Laboratories, California State Fire Marshal (CSFM) and the Bureau of Standards and
Appeals (NYC).
All equipment shall be completely factory assembled, wired and tested, and the contractor shall be prepared to submit a certified
letter testifying to this condition. Alarms which do not meet all of the requirements of this specification will not be considered.
24 units per carton
34 pounds per carton
Electrical Specifications
Operating Voltage (9120/9123) . . . . . . . . . . . . . . . . . . . . 120VAC, 60Hz
Operating Voltage (9220/9223) . . . . . . . . . . . . . . . . . . . . 220VAC, 50Hz
Operating Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .045 amps
Operating Current (Relay Options) . . . . . . . . . . . . . . . . . .070 amps
Operating Ambient Temp Range . . . . . . . . . . . . . . . . . . . 40°F to 100°F
Alarm Horn Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90dBA at 10 feet
Nominal Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5% obscuration
“F” Auxiliary Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Form A & 1 Form C (0.6 amp)
“T” Integral Thermal (Self-Restoring) . . . . . . . . . . . . . . . . 135°F at 50 feet
“H” Isolated Thermal Form A (Self-Restoring) . . . . . . . . . 135°F at 50 feet
Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diameter: 6.5 in. OA (5.75 in. at Ceiling)
Depth: 2.625 in.
Secondary Power Source . . . . . . . . . . . . . . . . . . . . . . . . Alkaline 9VDC battery
9 0 0 0 /
9 0 0 3
S E R I E S
551-0040-02