Johnson Controls GS3000 User manual

GS3000 Indoor Gas Detection Sensor Series
Installation Guide
Introduction
The GS3000 Gas Detection Sensor Series uses an
electrochemical sensor to monitor the carbon monoxide
(CO) or nitrogen dioxide (NO2) level and ouptut a factory-
calibrated signal. The output signals available for the CO
model are 4 mA to 20 mA or 0 VDC to 10 VDC. Optionally,
you can configure the device with an alarm relay. The
output signal available for the NO2 model is 4 mA to 20 mA
and comes standard with a configurable alarm relay.
Figure 1: GS3000 CO or NO2 transmitter
Important: Read these instructions carefully
before you install and commission the CO or NO2
transmitter. Failure to follow these instructions may
result in product damage. Do not use in an explosive
or hazardous environment, with combustible or
flammable gases, as a safety or emergency stop
device, or in any other application where failure
of the product could result in personal injury.
Take electrostatic discharge precautions during
installation and do not exceed the device ratings.
Dimensions
Figure 2: Dimensions of the CO and NO2 transmitter
Mounting
About this task:
• Mount the transmitter on a flat surface three to five feet
from the floor of the controlled area.
• Do not mount the sensor near doors, opening windows,
supply air diffusers, or other known air disturbances.
• Avoid areas with vibrations or rapid temperature
changes.
To install the transmitter, complete the following steps:
1. The transmitter has two integrated mounting tabs
on either side of the enclosure. Use a No. 10 screw
(not supplied) to mount the transmitter. See Figure
3.
2. To remove the cover from the enclosure, loosen the
4 Phillips screws in each corner of the enclosure.
See Figure 4.
3. Complete the wiring instructions outlined in the
Wiring section.
Figure 3: Integrated mounting tabs
Figure 4: Removing the cover
*241148400013-*
Part No. 24-11484-00013 Rev. —
2020-10-01
(barcode for factory use only)
GS3000, GS3001

Figure 5: Reinstalling the cover
4. Reinstall the cover and tighten the screws with a
Phillips screwdriver. See Figure 5.
Wiring
About this task:
Important: Use 22 AWG shielded wire for all
connections and do not locate the device wires in the
same conduit with wires that supply inductive loads
such as motors. Disconnect the power supply before
you make any connections to prevent electrical shock
or equipment damage. Make all connections in
accordance with national and local codes.
CO wiring
About this task:
Ensure the controller Analog Input (AI) matches the
transmitter output signal type before you apply power.
The output signal has a minimum load that it drives.
Follow the ratings in the Technical specifications section.
For the CO transmitter, depending on the configuration
with or without an alarm relay, the product is either a 3-
wire sourcing device or a 2-wire loop-powered device. To
determine the correct wiring for the product, see Figure 6.
All models have the same terminal functions.
To wire the CO transmitter, complete the following steps:
1. For a 4 mA to 20 mA loop-powered operation:
- Use the POWER and OUTPUT terminals for a
DC power supply
- Use the COMMON terminal for an AC power
supply
2. Connect the positive DC voltage to the POWER
terminal and the 4 mA to 20 mA signal is available
on the OUTPUT terminal. See Figure 6. The device
is reverse voltage-protected and will not operate if
you connect it backwards.
Figure 6: CO wiring connections
3. For 0 VDC to 10 VDC operations, connect either
an AC or DC power supply to the POWER and
COMMON terminals. The 0 VDC to 10 VDC signal is
available on the OUTPUT terminal with respect to
COMMON. See Figure 6.
4. For 3-wire operation of the relay model, connect
either an AC or DC power supply to POWER and
COMMON with respect to COMMON. The device is
reverse voltage-protected and will not operate if
you connect the power supply backwards.
Note: In a 3-wire device operating mode, the
current output operates in the Active mode
and does not require a loop power supply. This
means the transmitter generates the signal
current. You must not connect the transmitter
to a power supply or device damage may result.
NO2 wiring
About this task:
For the NO2 transmitter, the product is a 3-wire sourcing
device. To determine the correct wiring for the product,
see Figure 7. The current signal has a maximum load that
GS3000 Indoor Gas Detection Sensor Series Installation Guide2

it drives. Follow the ratings in the Technical specifications
section.
To wire the NO2 transmitter, complete the following steps:
1. Connect either an AC or DC power supply to POWER
and COMMON and the 4 mA to 20 mA signal is
available on the OUTPUT terminal with respect to
COMMON. See Figure 7.
Note: In a 3-wire device operating mode, the
current output operates in the Active mode
and does not require a loop power supply. This
means the transmitter generates the signal
current. You must not connect the transmitter
to a power supply or device damage may result.
Figure 7: NO2 wiring connections
Operation
In normal operation, the sensor measures either the CO or
NO2 level in the surrounding air and output a proportional
value on the Analog output. The CO measurement range is
0 ppm to 300 ppm. The NO2 measurement range is 0 ppm
to 10 ppm. Use the relay to indicate an alarm condition.
You can program the trip point for the relay to three
different settings with an onboard jumper. See Figure
8. If the CO or NO2 level exceeds the trip point, the relay
activates. The relay remains active until the level level
drops below the hysteresis trip level. The hysteresis trip
level for CO is 3% or 9 ppm and the hysteresis trip level for
NO2 is 3%.
Figure 8: Trip point relay
Start-up
Verify that you correctly wired the transmitter according
to the diagrams in the Wiring section and that all
connections are tight. Apply power to the device and the
sensor starts to read the CO or NO2 level and output the
analog signal.
Calibration
CO transmitter calibration
About this task:
The CO transmitter features a simple snap-mount pre-
calibrated sensor PCB. You can replace the entire sensor
PCB with a new calibrated PCB without the removal of the
enclosure. This sensor swap requires no tools and you
can complete it in seconds. Disconnect the device wiring,
remove the old sensor PCB, snap in the new PCB, and
reconnect the device power. There is no need to make
any adjustments or apply gas to the transmitter using the
sensor swap method.
If necessary, calibrate the device or verify with CO gas.
This requires a field calibration kit that consists of a
bottle of gas, for example, 250 ppm CO in air, a tank
pressure regulator with flow restrictor, and the necessary
tubing with a calibration cap to cover the sensor. You can
calibrate at 68°F to 81°F (20°C to 27°C).
You can verify with gas without the removal of the device
cover. Use the calibration cap attached directly to the
port on the cover to apply gas and monitor the output
value. See Figure 9. Remove the device cover to perform
an actual calibration. In this case, the gas calibration cap
attaches to the sensor fixture inside the enclosure. See
Figure 10.
GS3000 Indoor Gas Detection Sensor Series Installation Guide 3

Figure 9: Calibration cap attached to external cover
port
Figure 10: Calibration cap attached to internal sensor
fixture
For local display, on a device with a 0 VDC to 10 VDC
output, use a voltmeter to measure between the OUT and
COM terminals to measure the output. For a device with
4 mA to 20 mA, place an ammeter in series of the output.
Disconnect the signal wire from the OUT terminal of the
CO sensor. Connect the + lead of the ammeter to the OUT
terminal of the CO sensor and connect the COM lead of
the ammeter to removed signal wire. Set ammeter to read
a 20 mA signal.
Continuously power the sensor for at least 30 min prior to
calibration. To calibrate the sensor, complete the following
steps:
1. Calibrate the sensor first in clean air with no CO gas
present. Adjust the ZERO pot on the sensor board
until you obtain a 0 VDC or 4 mA output depending
on device. For this case, adjust the output slightly
above 0 VDC or 4 mA and slowly reduce the output
signal to 0 VDC or 4 mA, depending on the device.
2. Monitor the output signal with the voltmeter
or ammeter that connects to the OUTPUT and
COMMON terminals.
3. Attach the gas supply.
4. Turn the regulator on/off knob fully off and attach
it to the 250 ppm gas bottle and firmly tighten it by
hand.
5. Moisten the sponge and squeeze out any excess
water.
6. Place the sponge in the cap so that it does not
touch the sensor and does not plug the hole in the
side of the cap.
7. Attach the cap to the fixture over the sensor.
8. Slowly turn the valve knob on the regulator to let
the gas flow. The regulator restricts the flow rate
to the specified 200 ml per min and the sponge
ensures the gas is in the right humidity range.
9. Wait for 5 min and adjust the SPAN pot on the
sensor board until the output value reads 250 ppm.
For the 0 ppm to 300 ppm device span, 250 ppm
equals 8.33 VDC or 17.33 mA, depending on the
model.
10. Close the valve on the tank and take the cap off
from the sensor. This completes calibration.
11. If the gas cap is too loose on the fixtures, wrap
electrical tape around the cap to tighten it.
NO2 transmitter calibration
About this task:
The NO2 transmitter features a simple snap-mount pre-
calibrated sensor PCB. You can replace the entire sensor
PCB with a new calibrated PCB without the removal of the
enclosure. This sensor swap requires no tools and you
can complete it in seconds. Disconnect the device wiring,
remove the old sensor PCB, snap in the new PCB, and
reconnect the device power. There is no need to make
any adjustments or apply gas to the transmitter using the
sensor swap method.
If necessary, calibrate the device or verify with NO2 gas.
This requires a field calibration kit that consists of a
bottle of gas, for example, 10 ppm NO2 in air, a tank
pressure regulator with flow restrictor, and the necessary
tubing with a calibration cap to cover the sensor. You can
calibrate at 68°F to 81°F (20°C to 27°C).
You can verify with gas without the removal of the device
cover. Use the calibration cap attached directly to the port
on the cover to apply gas and monitor the output value.
See Figure 11. Remove the device cover to perform an
actual calibration. In this case, the gas calibration cap
attaches to the sensor fixture inside the enclosure. See
Figure 12.
Figure 11: Calibration cap attached to external cover
port
GS3000 Indoor Gas Detection Sensor Series Installation Guide4

Figure 12: Calibration cap attached to internal sensor
fixture
For local display, place an ammeter in series of the output.
Disconnect the signal wire from the OUT terminal of the
NO2 sensor. Connect the positive lead of the ammeter
to the OUT terminal of the NO2 sensor and connect the
COM lead of the ammeter to the removed signal wire. Set
ammeter to read a 20 mA signal.
Continuously power the sensor for at least 30 min prior to
calibration. To calibrate the sensor, complete the following
steps:
1. Calibrate the sensor first in clean air with no NO2
gas present. Adjust the ZERO pot on the sensor
board until you obtain a 4 mA output.
2. Attach the gas supply.
3. Turn the regulator on/off knob fully off and attach
it to the 10 ppm NO2 gas bottle and firmly tighten it
by hand.
4. Attach the cap to the fixture over the sensor.
5. Slowly turn the valve knob on the regulator to let
the gas flow.
6. Calibrate the sensor either by applying SPAN gas
with a flow rate of 0.5 L to 1 L per minute or wait 2
min and adjust the SPAN pot on the sensor board
until you obtain a 20 mA output.
Note: The SPAN gas does not have to be the
full scale concentration, but could be a fraction
of this. A half-scaled concentration of 5 ppm
provides a 12 mA signal.
7. Close the valve on the tank and take the cap off
from the sensor. This completes calibration.
8. If the gas cap is too loose on the fixtures, wrap
electrical tape around the cap to tighten it.
GS3000 Indoor Gas Detection Sensor Series Installation Guide 5

Technical specifications
Table 1: GS3000 Carbon Monoxide Transmitter technical specifications
Specification Description
Measurement Electrochemical
Sample method Diffusion
Measurement range CO: 0 ppm to 300 ppm
NO2: 0 ppm to 10 ppm
Accuracy CO: ±5 ppm or ±5% of reading, whichever is greater
32° to 122°F (0°C to 50°C), 15% RH to 90% RH
NO2: ±0.2 ppm or ±5% of reading, whichever is greater
Operating conditions -4°C to 122°F (-20°C to 50°C), 15% RH to 90% RH, 0.9 atm to 1.1 atm
Stability CO: <5% signal loss per year
Response time CO: <35 s for 90% step change
Life expectancy CO: 7 years
NO2: >2 years
Area coverage 7500 ft2 (700 m2) or 50 ft (15 m) radius
Power supply 24 VDC ±20% or 24 VAC ±10%, non-isolated half-wave rectified
Consumption CO: Relay model: 40 mA maximum
Non-relay model: 20 mA maximum
NO2: 50 mA maximum
Output signal CO: 4 mA to 20 mA or 0 VDC to 10 VDC
NO2: 4 mA to 20 mA
Output drive capability CO: Current 550 ohm maximum at 24 VAC or VDC
Voltage 10 K ohm, minimum
NO2: 550 ohm maximum at 24 VAC or VDC
Optional relay contacts CO: Form C contacts (N.O. and N.C.), 5 A at 250 VAC, 5 A at 30 VDC
NO2: Form C contacts (N.O. and N.C.), 5 A at 30 VDC
Relay trip point CO: 25 ppm, 60 ppm, or 150 ppm jumper-selectable
NO2: 1 ppm, 3 ppm, or 5 ppm jumper-selectable
Relay hysteresis CO: 3% or 9 ppm
NO2: 3%
Wiring connections Screw terminal block, 14 AWG to 22 AWG
Enclosure (H x W x D) 4.1 in. x 2.8 in. x 1.9 in. (104 mm x 71 mm x 48 mm)
Material Polycarbonate, UL94-V0, IP65 (NEMA 4X)
Country of origin Canada
Compliance Manufactured in an ISO 9001 Registered Quality System
Europe: CE Mark - Johnson Controls declares that this product is in Compliance
with the essential requirements and other relevant provisions of the EMC
Directive.
The performance specifications are nominal and conform
- acceptable industry standards. For application at
conditions beyond these specifications, consult the local
Johnson Controls office. Johnson Controls, Inc. shall not
be liable for damages resulting from misapplication or
misuse of its products.
Product warranty
This product is covered by a limited warranty, details of which can be found at www.johnsoncontrols.com/
buildingswarranty.
Software terms
Use of the software that is in (or constitutes) this product, or access to the cloud, or hosted services applicable to
this product, if any, is subject to applicable end-user license, open-source software information, and other terms
set forth at www.johnsoncontrols.com/techterms. Your use of this product constitutes an agreement to such terms.
Patents
Patents: https://jcipat.com
GS3000 Indoor Gas Detection Sensor Series Installation Guide6

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GS3000 Indoor Gas Detection Sensor Series Installation Guide 7

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