Carrier NSB-NO2-V-BB Manual

#38960 –
1/10/19
Overview
The Nitrogen Dioxide (NO
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
ranges and outputs, plus two
independent SPDT alarm contacts
that switch at field selectable
concentrations. An alarm timer holds the
output relays on for a fixed time after the
NO level has fallen below 80% of
2
setpoint. This allows additional fan run
time to be sure that the NO
purged.
The LCD is backlit for 10 seconds
after a button push. A status LED
is green when the NO is below the
2
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
Catalog No. 11-808-709-01
Nitrogen Dioxide Duct and Rough Service Sensor
) Rough Service Sensor (Part #NSB-NO2-V-BB) offers enhanced electrochemical sensing
2
NO
2
NO
2
has been
2
Specifications subject to change without notice.
Figure 1: NO Rough Service Sensor and parts
2
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
Installation and Operation
Cover latch
screws
Conduit Mounting
foam plug screws
1 of 12