Gentex GN-503 SERIES User manual

GN-503
SERIES
Standard Product Features
• GN-503 available in 120VAC with 9VDC battery back-up
• Horn frequency 3100 Hz (nominal)
• Meets sensitivity requirements of ANS /UL 2034
• F Model: One (1) set of Form A/Form C contacts that activate
for smoke and/or CO events
••FFFF MMooddeell:: TTwwoo ((22)) sseettss ooff FFoorrmm AA//FFoorrmm CC ccoonnttaaccttss tthhaatt aaccttiivvaattee
iinnddeeppeennddeennttllyy ffoorr ssmmookkee aanndd CCOO eevveennttss
•Relay contacts operate on battery back-up
•Push button self test feature
• Push button functional test feature
• Quick-disconnect wiring harness
• Non-latching (self restoring) alarm
• Fully insect protected
• Red
LED pulses every 30 seconds, green LED for AC
power on
• Mounting hardware adapts to standard junction boxes,
including but not limited to 4x4x2-1/8 octagon
• Dust cover to prevent contamination during installation
• Low or missing battery indicator
• 1 year warranty from date of purchase
• 5 year limited warranty on CO sensor
Additional Smoke Alarm Features
• Photoelectric smoke sensing technology
• Temporal 3 evacuation sounding pattern for smoke
annunciation
• Nominal 2.5% sensitivity (smoke)
• Solid state red
LED to indicate smoke presence
Additional CO Alarm Features
• Electrochemical sensor
• Temporal 4 sounding pattern for CO annunciation
• End of life signal indicates CO sensor has reached
depletion state and unit must be replaced
•• AANNSS//UULL 221177 aanndd AANNSS//UULL 22003344 LLiisstteedd
•• CCSSFFMM ## 55227766--00556699::114444
Combination Photoelectric Smoke
and Carbon Monoxide Alarm
120VAC/9VDC Single/Multiple Station Smoke
and CO Alarm
Product Listings
Applications
The GN-503 (120VAC/9VDC) Series of combination photoelectric smoke and
electrochemical sensor carbon monoxide alarms are for use as evacuation devices in all
dwelling units, including but not limited to homes, apartments, hospitals, hotels, motels
and other commercial occupancies. The GN-503 Series is listed in compliance with
ANS /UL 217, ANS /UL 2034, for installation per NFPA 720 and NFPA 72.
Available in three models, the GN-503 Series is engineered to virtually eliminate
nuisance alarms and deliver outstanding performance wherever reliable smoke and CO
protection is required. The GN-503F features one (1) set of Form A/Form C contacts that
activate for smoke and/or CO events. TTHHEE GGNN--550033FFFF FFEEAATTUURREESS TTWWOO ((22)) SSEETTSS
OOFF FFOORRMM AA// FFOORRMM CC CCOONNTTAACCTTSS TTHHAATT AACCTTVVAATTEE NNDDEEPPEENNDDEENNTTLLYY FFOORR
SSMMOOKKEE AANNDD CCOO EEVVEENNTTSS.. Both the GN-503F and GN-503FF provide a connection
to a protected premises alarm system to provide a supervisory/trouble signal.
The GN-503 Series is provided with a 9VDC alkaline battery for electrical back-up in the
event building power is lost. The battery impedance is verified and the alarm provides a
low or missing battery warning. The battery drawer provides easy replacement without
removing the unit from the wall or ceiling.
The GN-503 Series is designed with a self test feature that quickly notifies if the alarm is
functioning properly or needs attention (signified by a series of chirps) by simply pressing
the test button. The functionality tests that the smoke/CO alarm is operating properly
(signified by going into alarm). The self and functionality tests are in compliance with
NFPA 72, NFPA 720 and ANS /UL Standards.
The GN-503 Series provides a temporal 3 evacuation tone for smoke alarm annunciation
and all units provide a temporal 4 tone for CO alarm annunciation. Per NFPA 720, the
temporal 3 evacuation tone for smoke alarm will take precedence over the temporal 4
tone for CO alarm.
•• NNFFPPAA 7722 aanndd NNFFPPAA 772200
•• BBCC//FFCC//RRCC
•• CCiittyy && SSttaattee OOrrddiinnaanncceess//LLaawwss//RReegguullaattiioonnss
•• QQuuaalliittyy MMaannaaggeemmeenntt SSyysstteemm iiss cceerrttiiffiieedd
ttoo:: SSOO 99000011::22000088
Product Compliance
NNEEWW
FFEEAATTUURREESS

MMooddeell
NNuummbbeerrVVoollttaaggee99VVDDCC BBaatttteerryy BBaacckk--UUpp
OOnnee ((11)) SSeett
FFoorrmm AA// FFoorrmm CC
RReellaayy CCoonnttaaccttss
TTwwoo ((22)) SSeettss
FFoorrmm AA// FFoorrmm CC
RReellaayy CCoonnttaaccttss
GN-503 120VAC 
GN-503F 120VAC  
GN-503FF 120VAC  
GN-503 AND GN-503F Wiring Diagrams
GN-503 Series Combination Smoke/CO Alarm
GN-503/GN-503F ADDITIONAL PRODUCT INFORMATION
THE GN-503F AND GN-503FF PRODUCT W R NG HARNESS S NOT NTERCHANGEABLE. THE GN-503F AND GN-503FF
MUST USE PROPER W R NG HARNESS. PRODUCT W LL NOT FUNCT ON F NCORRECT HARNESS S USED.
DO NOT connect Gentex alarms to other manufacturers’ alarms.
Per NFPA 72, a maximum of 18 compatible smoke, heat, CO and/or combination smoke/CO alarms may be interconnected. No
more than 12 of the 18 can be smoke alarms.
All units connected in tandem MUST get their power from the same circuit, that is, all smoke alarms in tandem must be
controlled by the same fuse or circuit breaker.
NOT CE : PER NFPA 72, A MAX MUM OF 12 SMOKE/CO ALARMS OF GN-503 W TH THE RELAY OPT ON (F) MAY BE
TANDEM NTERCONNECTED.
The GN-503/GN-503F may be tandem interconnected with other Gentex tandem capable smoke alarms, CO alarms or smoke/CO
alarms. To interconnect with Gentex 9000 Series, 7000 Series, 710CS Series, 7109CS Series, GN-200 Series & GN-300 Series
the LEGACY TANDEM W RE must be used. Refer to installation manual for detailed information.
CCAAUUTTOONN::RED/YELLOW & BROWN/YELLOW wire to be capped when not in use. This wire is for tandem connection only. Do not
connect to any other circuit.
f a GN-503 Series or CO1209 Series unit is annunciating for a CO event, legacy products that are tandem interconnected will
not activate and will remain silent.
f smoke alarm portion of device goes into alarm, all smoke alarms, CO alarms or combination smoke/CO alarms tandem wired
will sound smoke alarm warning.
When both smoke and CO conditions are present, smoke condition will have priority and alarm will sound smoke annunciation.
PLUG SMOKE/CO
ALARM
BLK
WHT
RED / YEL
VIO
VIO / BLK
BLU
ORN
YEL
GRAY
GRAY
HOT
NEUT
POWER
TANDEM - LEGACY
ALARM
CONTACTS
ACCESSORY
ALARM
CONTACTS
INTERNAL
JUMPER
BRN / YEL TANDEM
ELECTRICAL BOX
SMOKE/CO
ALARM
QUICK DISCONNECT
TYPE PLUG
HOT / BLACK
NEUTRAL / WHITE
TANDEM WIRE
BRN / YEL
SMOKE
ALARM
SMOKE/CO
ALARM
ELECTRICAL BOX ELECTRICAL
BOX
TANDEM WIRE
RED / YEL
(LEGACY)
(LEGACY)

USING THE GENTE GN-503FF COMBINATION SMOKE AND
CARBON MONO IDE ALARM ALLOWS THE ABILITY TO:
• Interface with a FACP Panel
• Interface with NAC Circuits
GN-503FF ADDITIONAL PRODUCT INFORMATION
Use brown/yellow wire to tandem interconnect GN-503FF alarms to additional GN-503 Series, S1209 Series and CO1209 Series.
NOT CE: THE GN-503FF S ONLY CAPABLE OF TANDEM NTERCONNECT W TH GN-503 SER ES, CO1209 SER ES AND
S1209 SER ES.
THE GN-503F AND GN-503FF PRODUCT W R NG HARNESS S NOT NTERCHANGEABLE. THE GN-503F AND GN-503FF
MUST USE PROPER W R NG HARNESS. PRODUCT W LL NOT FUNCT ON F NCORRECT HARNESS S USED.
DO NOT connect Gentex alarms to other manufacturers’ alarms.
Per NFPA 72, a maximum of 18 compatible smoke, heat, CO and/or combination smoke/CO alarms may be interconnected. No
more than 12 of the 18 can be smoke alarms.
All units connected in tandem MUST get their power from the same circuit, that is, all smoke alarms in tandem must be
controlled by the same fuse or circuit breaker.
NOT CE : PER NFPA 72, A MAX MUM OF 12 SMOKE/CO ALARMS OF GN-503 W TH THE RELAY OPT ON (FF) MAY BE
TANDEM NTERCONNECTED.
CCAAUUTTOONN::BROWN/YELLOW wire to be capped when not in use. This wire is for tandem connection only. Do not connect to any
other circuit.
f smoke alarm portion of device goes into alarm, all smoke alarms, CO alarms or combination smoke/CO alarms tandem wired
will sound smoke alarm warning.
When both smoke and CO conditions are present, smoke condition will have priority and alarm will sound smoke annunciation.
GN-503FF Wiring Diagrams
PLUG SMOKE/CO
ALARM
BLK
WHT
VIO
VIO
ORN
YEL
HOT
NEUT
POWER
SMOKE ALARM
CONTACTS (FORM A CONTACT)
BRN / YEL TANDEM
SMOKE FORM C COMMON
SMOKE NORMALLY CLOSED
CO ALARM
CONTACTS (FORM A CONTACT)
PINK
PINK
BLU
GRAY
VIO / YEL
FORM C
ALARM
CONTACTS
SMOKE & CO NORMALLY OPEN
CO FORM C COMMON
CO NORMALLY CLOSED
ELECTRICAL BOX
SMOKE/CO
ALARM
QUICK DISCONNECT
TYPE PLUG
HOT / BLACK
NEUTRAL / WHITE
TANDEM WIRE
BRN / YEL
SMOKE/CO
ALARM
ELECTRICAL BOX ELECTRICAL
BOX
SMOKE/CO
ALARM

GN-503
SERIES
551-0073-04
mportant 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, regu-
lations 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.
AArrcchhiitteecctt && EEnnggiinneeeerriinngg SSppeecciiffiiccaattiioonnss
The combination photoelectric smoke and carbon monoxide alarm shall be a Gentex Model GN-503/GN-503F/GN-503FF or approved
equal which shall provide at least the following features and functions:
1. Nominal smoke sensitivity shall be 2.5%.
2. The smoke alarm portion of device 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 shall activate.
3. The CO alarm shall utilize an electrochemical sensing element with a minimum 5-year life.
4. The carbon monoxide alarm portion of device is adjusted not to detect CO levels below 30 PPM and will not alarm when exposed
to constant levels of 30 PPM for 30 days. Per ANS /UL 2034 requirements, the device will alarm at the following levels: 70 PPM
CO between 1 to 4 hours, but not less than 1 hour. 150 PPM CO between 10 to 50 minutes. 400 PPM between 4 to 15 minutes.
5. The GN-503 Series device shall have a Duracelll
®
MN 1604 9VDC alkaline battery as a back-up in the event building power is lost.
6. The 9VDC battery impedance shall be verified by the circuit of the smoke/CO alarm.
7. The alarm shall provide an indicator when the battery is low in power, high impedance or is missing.
8. The CO alarm will provide an audible indicator of 3 quick chirps every 30 seconds at end of life of CO sensor.
9. The sensing chamber shall be fully protected to prevent entrance of small insects, thus reducing the probability of false alarms.
10. The alarm shall include a solid state red color LED that will indicate presence of CO at the unit.
11. The alarm shall include a solid state piezo alarm rated at 85dBA at 10ft.
12. A visual LED monitor (condition indicator) shall slow pulse in normal operation and rapid pulse in alarm (red color)
13. An easily accessible test button shall be provided. Push down on button for 5 seconds causing smoke/CO alarm to activate.
f device does not go into alarm, the device is not working properly.
14. The device shall have tandem interconnect capability of up to 12 smoke/CO alarms.
15. The GN-503 and GN-503F alarm shall have the capability to tandem interconnect with all Gentex tandem capable smoke
alarms, CO alarms or combination smoke/CO alarms, including 7000/7003 Series, 9000/9003 Series, 710CS/713CS Series,
7109CS/7139CS Series, GN-200/GN-300 Series, S1209 Series and CO1209 Series.
15. The GN-503FF alarm shall have the capability to tandem interconnect with the following Gentex alarms, CO alarms or
combination smoke/CO alarms: GN-503 Series, S1209 Series and CO1209 Series.
16. The manufacturer shall provide models with the optional feature of auxiliary Form A/Form C relay contacts for initiating remote
functions and annunciation and a relay option that is capable of activation by tandem interconnect wire.
17. The combination smoke/CO alarm shall be non-latching (self-restoring).
18. Unit must be ANS /UL 217 and ANS /UL 2034 listed for both wall and ceiling mounting.
19. Unit shall be listed by Underwriters Laboratories and California State Fire Marshal (CSFM).
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.
For complete product specifications, refer to product installation manual.
24 units per carton
24 pounds per carton
Electrical Specifications
Operating Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120VAC, 60Hz
Operating Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .045 amps
Operating Current (Relay Options) . . . . . . . . . . . . . . . . . . . . . . .070 amps
Operating Ambient Temp Range . . . . . . . . . . . . . . . . . . . . . . . . 40°F to 100°F (4.4°C-38°C)
Alarm Horn Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85dBA at 10 feet (3.048 m)
Auxiliary Relay (GN-503F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Form A & 1 Form C (0.5 amp)
Auxiliary Relay (GN-503FF) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Form A & 2 Form C (0.3 amp)
Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diameter at base: 5.75 in. (14.605 cm)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overall diameter 6.25 in. (16.51 cm)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Depth: 1.8 in. (4.572 cm)
Secondary Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alkaline 9VDC battery (Duracell
®
MN 1604)
CO Sensing Cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrochemical Cell