Carrier NSB-NO2-V-BB User manual

Nitrogen Dioxide Duct and Rough Service Sensor
Installation and Operation
1 of 12
Specifications subject to change without notice.
Catalog No. 11-808-709-01
#38960 –1/10/19
Overview
The Nitrogen Dioxide (NO2) Rough Service Sensor (Part #NSB-NO2-V-BB) offers enhanced electrochemical sensing
with outstanding accuracy at low concentrations. The Duct unit (Part #NSB-NO2-D-BB) samples duct air using an
aspiration tube. The Rough Service unit features a ventilated BB box and is ideal for parking ramps, equipment rooms
and warehouses.
The sensor has field selectable NO2
ranges and outputs, plus two
independent SPDT alarm contacts
that switch at field selectable NO2
concentrations. An alarm timer holds the
output relays on for a fixed time after the
NO2level has fallen below 80% of
setpoint. This allows additional fan run
time to be sure that the NO2has been
purged.
The LCD is backlit for 10 seconds
after a button push. A status LED
is green when the NO2is below the
lowest relay setpoint. The LED turns red
when an alarm relay is on.
Specifications
Power
18 to 28 VAC, 7.2 VA Max
18 to 40 VDC, 180 mA Max
Field Selectable Ranges
0 to 2.5 ppm • 0 to 5.0 ppm
0 to 7.5 ppm • 0 to 10.0 ppm
Accuracy
±5% of full scale
Alarm Relays
2 Independent, Dry SPDT (Form C)
2 Amps at 24 VAC/DC, resistive
140 VA Inrush, 48 VA holding at 24 VAC
Field Wiring Terminals
Pluggable screw terminals, 14 to 24 AWG
Response Time
<80 seconds from 10% to 90% of range
Alarm Relay Setpoints
1.0, 2.5, 5.0, 7.5, or 10 ppm
Alarm Timer
0, 1, 5, and 10 minutes
Field Selectable Analog Outputs
3-wire 4 to 20 mA
0 to 5 VDC, 1 to 5 VDC
0 to 10 VDC, 2 to 10 VDC
Environmental Operation Range
14 to 122°F (-10 to 50°C)
5 to 95% RH non-condensing
Sensor Module Life
7 years typical
Cover latch
screws
Conduit
foam plug
Mounting
screws
Figure 1: NO2Rough Service Sensor and parts

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Specifications subject to change without notice.
Nitrogen Dioxide Duct and Rough Service Sensor
Installation and Operation
Catalog No. 11-808-709-01
#38960 –1/10/19
Mounting
Rough Service Ventilated Unit
1. Mount the unit on a solid, non-vibrating surface 3 to 5 feet above floor level.
Mount in a horizontal orientation with the enclosure hinge at the top as shown in
Figure 2. Failure to do so may degrade the life of the sensor module. Do not
mount near supply or return diffusers.
2. Use #10 (M5) screws on the four mounting feet of the enclosure. A pilot-hole
makes mounting easier. Use the enclosuremounting feet to mark the pilot-hole
locations.
3. Snug up the screws so that the foam backing is depressed but do not over-tighten
or strip the screw threads.
4. Place the provided #6 screws into the holes on each site of the lid latch to make
the cover tamper resistant. Figure 2: Rough Service
Unit mounting
Duct Aspiration Tube Unit
1. Automatd Logic recommends placing the sensor in the middle of the
duct wall, away from stratified air, to achieve the best reading. The unit
should also be a minimum of 3 duct diameters from an elbow, damper
or other duct restriction.
2. Drill a 1” hole for the aspiration probe. Position the box so that airflow is
directly into the holes on one side of the aspiration probe. The air direction
is not important.
4. Mount the enclosure to the duct using #10 screws through a minimum of
two mounting feet on opposite corners. A 1/8” pilot hole makes mounting
easier. Use the mounting feet to mark the pilot-hole locations.
5. Snug the screws until the foam backing is compressed about 50% to
prevent air leakage but do not over-tighten.
6. Use the provided #6 screws to secure the cover for IP66 rating.
7. Error! Bookmark not defined.recommends sealing the conduit opening with fiberglass insulation.
Figure 3: Duct Unit mounting

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Nitrogen Dioxide Duct and Rough Service Sensor
Installation and Operation
Specifications subject to change without notice.
Catalog No. 11-808-709-01
#38960 –1/10/19
Mounting Holes Template
Figure 4: Screw Hole Template. Shown actual size.

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Nitrogen Dioxide Duct and Rough Service Sensor
Installation and Operation
Specifications subject to change without notice.
Catalog No. 11-808-709-01
Fig. 4: Field Wiring Terminals
#38960 –1/10/19
Termination
Carrier®recommends using twisted pair of at least 22 AWG and sealant filled connectors for all wire connections. Larger
gauge wire may be required for long runs. All wiring must comply with the National Electric Code (NEC) and local codes.
Remove the plug from the conduit opening you wish to use. The field wiring terminals are on a board in the base of the
unit. A legend describing the function of each terminal is printed on the circuit card in the lid. (See Figure 5)
WIRING TERMINALS
VIN –Input Power
18 to 28 VAC, 7.2 VA Max
18 to 40 VDC, 180 mA Max.
GROUND:
Power and Analog Output Ground
I/V OUT
Three wire voltage or current signal
RELAYS
Relay contacts are galvanically isolated. They are not
connected to each other, or to circuit power or ground
in the carbon monoxidetransmitter.
N.O. –Normally Open Contact
COM –Common Contact
N.C. –Normally Closed Contact
Figure 5: Field Wiring Terminals
NOTE The connectors that plug into the jacks on the board use a rising block screw terminal to hold the wires. If the
block is in a partially up position, the wire may be inserted under the block and the wire will not be held when the screw
is tightened. To avoid improper wiring, turn the male connector screws counterclockwise until the block is below the wire
opening before inserting the wire. Lightly tug on each wire after tightening to verify proper termination.
Keeping the Enclosure Air Tight AfterTermination
For the sensor to work correctly, the wiring entrance must remain air tight. If the sensorr is mounted to a hollow wall and
wired through its back, or wired with conduit, it is possible that a draft of clean air may fill the enclosure through the
wiring opening. This draft may prevent the unit from measuring ambient Nitrogen
Dioxide.
Carrier recommends plugging the conduit at the enclosure. Included with the
Nitrogen Dioxide transmitter is a foam plug to seal the ½ inch EMT. Place the wires into
the plug as shown in Figure 6 and then insert the plug into the conduit sealing the conduit. Figure 6:
Wires Through Foam Plug
Carrier recommends wiring the product with power disconnected. Proper supply voltage, polarity and wiring
connections are important to a successful installation. Not observing these recommendations may damage
the product and void the warranty.

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Nitrogen Dioxide Duct and Rough Service Sensor
Installation and Operation
Specifications subject to change without notice.
Catalog No. 11-808-709-01
#38960 –1/10/19
Relay Load Termination
The Alarm Relays may be used to switch a load on or off. Figure 7 shows a circuit that may be used to switch on a load
under alarm conditions. Figure 8 shows a circuit that may be used to switch off a load under alarm conditions. For clarity
only Alarm Relay 1 is shown, Alarm Relay 2 may be used in the same way.
Figure 9 shows how two or more Nitrogen Dioxide or Carbon Monoxide Sensors may be interconnected to switch a load.
This example shows how to turn on a load under alarm conditions. Similar circuitry may be used to turn off a load under
alarm conditions. Figure 9 connects together the Normally Open terminals of Alarm Relay #1 in both units and connects
them to the load. Figure 9 also connects together the Common terminals of Alarm Relay #1 in both units and then
connects them to the load’s power. This wiring circuit will drive the load whenever any one of the Nitrogen Dioxide
Sensors is in an alarm condition. NOTE Be sure to only connect similar terminals from each unit (Normally Open terminal
to Normally Open terminal, etc.). Cross connecting any of the terminals (Normally Closed to Common, etc.) may damage
the units and may void the warranty.
For clarity only Alarm Relay 1 is shown in the example below. Alarm Relay 2 may be used in the same way.
Figure 7:
Turn “On”
a load
under alarm
conditions
Figure 9:
Turn “On” a
load when
either unit
enters an alarm
condition
Figure 8:
Turn “Off”
a load
under alarm
conditions

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Nitrogen Dioxide Duct and Rough Service Sensor
Installation and Operation
Specifications subject to change without notice.
Catalog No. 11-808-709-01
#38960 –1/10/19
Relay Load Termination continued...
Some circuits require a switched ground to operate, such as audible alarms, visual alarms, or large AC motor
controllers. Figure 10 shows how to apply ground under an alarm condition. Figure 11 shows how to remove ground
under an alarm condition. For clarity only Alarm Relay 1 is shown. Alarm Relay 2 may be used in the sameway.
Power Up
During the first 10 minutes after applying power, the Nitrogen Dioxide Sensor performs the following functions:
• Front panel capacitive button test;
• Displays the sensor’s software version number;
• Displays the sensor’s serial number;
• Displays the sensor’s run time;
• Displays the NO2sensor module’s software version number;
• Displays the NO2sensor module’s serial number;
• Displays the NO2sensor module’s run time;
• Performs a NO2sensor module self-test;
When the NO2sensor module self-test is complete, the transmitter is operational.
Operation
The eight buttons on
the face of the unit
sense the user’s fingertip when pressed
against the plastic
cover. The buttons allow the user to
review or select
unit configuration parameters. The top
line of the display
continues to show the NO2 measurement
when reviewing or
selecting parameters.
Parameter Button
Function
Review or select Nitrogen Dioxide measurement range used for analog output
Review or select analog output range
Review or select PPM display on or off
View hidden values, verify edit mode, save edited configuration parameters, or end
configuration parameter edit
Review or select NO2concentration to enable Alarm 1 relay
Review or select number of minutes that Alarm 1 relay stays on after NO2dissipates
Review or select NO2concentration to enable Alarm 2 relay
Review or select number of minutes that Alarm 2 relay stays on after NO2dissipates
Figure 10:
Applying
ground
under alarm
conditions
Figure 11:
Removing
ground
under alarm
conditions

Nitrogen Dioxide Duct and Rough Service Sensor
Installation and Operation
Specifications subject to change without notice.
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Catalog No. 11-808-709-01
#38960 –1/10/19
Operation continued...
Display On and Display Off Modes
The top line of the display shows the NO2measurement when the Display Mode is set to “On” . If the Display Mode is set
to “Off,” the top line of the display shows the word “On” rather than the NO2measurement. If the NO2measurement is
below Alarm 1 or Alarm 2 levels, the LED will be green.
Figure 12:
Display During
Normal Operation
(Reading is below
NO2 alarm value)
PPM Display “On” Mode PPM Display “Off” Mode
Displaying the NO2 Measurement, Analog Output Range and Analog Output Value
Touching the Enter button displays the Current Reading, the Analog Output Range and Analog Output Value for 10
seconds. The current reading is replaced by the word “On” if the display is set to “Off”.
4 to 20 mA Output Mode
(PPM Display set to “On”) 0 to 5 Volt Output Mode (PPM Display set to “On”) 0 to 5 Volt Output Mode (PPM Display set to “Off”)
Figure 13: Display showing the Current Reading, the Analog Output Range and Analog Output Value
NO2 Sensor Failure Display
The NO2sensor element is tested for proper operation daily. If
the sensor fails:
• The top line of the display displays “Replace Sensor”
• The analog output is set to 100% of range
• Both relays turn on
• The LED flashes yellow
Figure 14: NO2 Sensor Failure

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Specifications subject to change without notice.
Nitrogen Dioxide Duct and Rough Service Sensor
Installation and Operation
Catalog No.11-808-709-01
#38960 –1/10/19
Operation continued...
Alarm Condition 1 Display
If the NO2measurement exceeds the Alarm
1 setpoint:
•
The NO2measurement or the word
“On” is displayed on the first line
• The alarm condition is display on
the second line
• The LED will be red
• The backlight flashes Alarm Condition 1
Figure 15: Display when the
measurement exceeds Alarm Condition
1 Setpoint
Alarm Condition 2 Display
If the NO2measurement exceeds the
Alarm 2 setpoint:
•
The NO2measurement or the word
“On” is displayed on the first line
• The alarm condition is displayed on
the second line
• The LED will be red
• The back light flashes
NOTE The Alarm 2 Setpoint may be
equal to, greater than or less than the
Alarm 1 Setpoint.
Alarm Condition 2
Figure 16: Display when the
measurement exceeds Alarm Condition
2 Setpoint
Alarm Condition 1 & 2 Display
If the NO2measurement exceeds the
Alarm 1 & 2 setpoint:
•
The NO2measurement or the word
“On” is displayed on the first line
• The alarm condition 1 and 2 is
displayed on the second line
• The LED will be red
• The back light flashes
NOTE The Alarm 2 Setpoint may be
equal to, greater than or less than the
Alarm 1 Setpoint.
Alarm Condition 1 & 2
Figure 17: Display when the measurement
exceeds Alarm Condition 1 & 2 Setpoint

Nitrogen Dioxide Duct and Rough Service Sensor
Installation and Operation
Specifications subject to change without notice.
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Catalog No. 11-808-709-01
#38960 –1/10/19
Reviewing Parameter Settings
You can review the parameter settings at any time during normal operation by touching any of the eight buttons on the face
of the unit. The following figures show a typical display when a button is touched. The values will display for 10 seconds
and then the display will revert to normal.
NO2Range Output Range (0 to 10 Volts)
Display Mode Alarm 1 Value Alarm 1 Time
Alarm 2 Value Alarm 2 Time
Figure 18: Parameter Settings

Nitrogen Dioxide Duct and Rough Service Sensor
Installation and Operation
Specifications subject to change without notice.
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Catalog No. 11-808-709-01
#38960 –1/10/19
Parameter Setup and Default Settings
If field personnel wish to change any parameter settings, they must remove the tamper resistant screws, open the cover,
and press the switch on the board labeled “Setup”. Follow Figure 19 below to change parameters.
Figure 19:
Parameter Setup Flow Chart
(Default settings are shown with gray shading)