Veris GSERIES Datasheet
G SERIES
Carbon Monoxide Sensors
Easy Control of Ventilation in
VERIS INDUSTRIES
Parking Garages and Mechanical Areas
DESCRIPTION
G Series carbon monoxide sensors maximize energy savings, while ensuring optimal
ventilation in parking garages and other mechanical areas. The sensors allow
ventilation systems to be controlled by the amount of CO present in a location. The G
Series detects uctuations in CO levels, and it signals air systems to provide an inlet
of fresh air optimal for the space at a given time. In this manner, the ventilation fan
does not need to run continuously, saving energy and reducing maintenance costs.
Upon alarm, the G Series will alert those in the area with both an audible and a
visual alarm.
The G Series devices are equipped with a relay contact that closes when CO level is
below 25 ppm and opens when the CO level is above 25 ppm. Sensor removal, power
interruption, or cut wires cause the external contactor (normally closed) to open and
start the fan. Minimum relay cycle time is 3 minutes to prevent fan short-cycling.
Audible Alarm: 85 dB alarm sounds if CO level rises above 100 ppm for 30 minutes.
APPLICATIONS
● Controlling parking garage ventilation
AIR QUALITY
● Ensuring OSHA air quality compliance in commercial buildings and fac tories
● Vehicle bays (ambulance/re/taxi stations)
● Mechanical rooms
● Sally ports
GW
GMxA
FEATURES
● Long-life replaceable sensor element
● Microprocessor controlled...excellent stability
● No calibration required...easy maintenance and worry-free operation
● Metal oxide semiconductor (MOS) sensor
● Interface to DDC system, GM panel, or direct fan control...easy integration with
existing systems
● Onboard fail-safe 5 Amp alarm relay for direc t ventilation fan control...simple
operation
● Interface to control system via selectable 4-20mA or 0-5/0-10VDC output...
application exibility
● Audible exposure alarm 100 ppm, 30 minutes per UL 2034...easy
troubleshooting
SPECIFICATIONS (G Series Sensor)
Input Power 12-30VDC/24VAC, 0.3A@12VDC, 0.3A@24VDC
Sensor Digitally-proled Metal Oxide Semiconductor (MOS)
Sensor Life 5-10 years t ypical, replaceable
Detection Range 0 to 200 ppm
Analog Output 3-wire sourcing 4-20mA or user-selectable 0-5V/0-10V (Specify mA or volt age)
Output Scaling User-selec table 100 ppm F.S. or 20 0 ppm F.S.
Response Time 2 minutes 30 second sample interval c ycle
Relay Output N.O. Form A (SPST) 8A@30VAC/VDC (use with N.C. contactor)
Relay Setpoint 25 ppm
High Limit Setpoint 100 ppm for 30 minute s
High Limit Alarm Audible, 85 dB, resets below 100 ppm; (Solid-state contact for -AS version)
High Limit Co ntact (-AS models) 250 VAC/DC, 120 mA max. Ron 35 Ω
LED Indicato rs Normal=Green; Call for ventilation=Red; High-limit alarm=Flashing Red
Operating Environment -20° to 50°C (-4° to 122°F); 0 to 90% RH non- condensing
Coverage 5000 sq. f t. typical (465 sq. m)
Physical white powder coat over steel
SPECIFICATIONS (GMxA Monitor)
Input Power 24VAC/VDC@0.5A
Inputs Detect contact closure from sensor relay. Four channels. 24VDC loop
Output Form C (SPDT) relay. 5A@30VAC
Alarm Indicators Four, 10 mm red LED indicates alarm status
Power Indicator Green LED indicates power supply operation
Operating Environment -20° to 50°C (-4° to 122°F); 0 to 90% RH non- condensing
Physical NEMA 1, metal enclosure, white
800.354.8556
+1 503.598.4564
www.veris.com
HQ00 01743. B 01131
800.354.8556
Typical Installation
Exhaust Fan
GM
Mount 5' above floor
To DDC system
(optional)
Supply Air Damper
+1 503.598.4564
www.veris.com
APPLICATION/WIRING DIAGRAMS
GD/GW
0-10V/0-5V
or
4-20mA
DDC
SYSTEM
-
-
15-30VDC
24VAC
+
+
SENSOR
10V
OUTPUT
Common
Out 0-5V/10V or 4-20mA
IN V+ 15-30VDC, 24VAC
N.O. Relay
N.O. Relay
200
100
PPM
5V
CONTACTOR
POWER
N.C. CONTACTOR
DIMENSIONAL DRAWINGS
GD/GW
0.9" dia.
(22 mm)
FAN
POWER
24VDC/VAC
GMxA
MONITORING
STATION
COMMON
FAN
RELAY
GND
V+
V+
GM
CONTACTOR
POWER
N.C. CONTACTOR
VERIS GD/GW SENSOR
N.C.
(sold separately)
COMM
N.O.
Common
Out 0-5V/10V or 4-20mA
IN V+ 15-30VDC, 24VAC
IN
N.O. Relay
N.O. Relay
200
PPM
Jumper
IN
unused Inputs
as shown.
FAN
POWER
5V
10V
OUTPUT
100
GM
5.0"
(127 mm)
4.5”
(114 mm)
2.5"
(63 mm)
2.25"
(57 mm)
2.4"
(55 mm)
GMxA Monitoring Station
The GMxA monitoring station accepts digital inputs from
up to four sensors to provide alarm status indication for
each channel, and a Form C (SPDT) fan actuation relay.
If any of the sensors detects CO levels above 25 ppm,
or if a fault is detected, the corresponding alarm status
indicator lights and the fan relay de-energizes (failsafe).
4"
(102 mm)
ORDERING INFORMATION
Sensor
Enclosure
Output
G
D = Duct mo unt
W = Wall mount
V = Field-selectable,
0-5/0-10VDC
M =4 -20m A
R = Relay only
Exam ple:
G W V X S
Auxiliary Alarm
Output
A = Auxiliar y Contact
X = None
4.9"
(125 mm)
GM CARBON MONOXIDE
MONITOR
ALARM STATUS
US or EU
1
2
3
4
S
= Standard
6.5"
(166 mm)
2.8"
(71 mm)
0.5"
(13 mm)
Monitoring Station
Sensor s = GWRXS
GM
Gas
Monitoring
Station
Exam ple:
GM 4 A
AIR QUALITY
A
0 = Station On ly
1 = Includes 1 S ensor
2 = Includes 2 S ensors
3 = Includes 3 S ensors
4 = Includes 4 S ensors
Ventilation control for energy savings and OSHA compliance in
parking garages and service bays
HQ00 01743. B 01131
ACCESSORIES
Verication Kits (AA32, AA39)
Replacement sensors (AA09)
Calibration gases (AA37, AA38)
Power Supplies: For a complete produc t oering check out our PS Series
AA32AA38AA09
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