Carrier NSB-10K-2-A-24 Installation and Operation Manual PDF

Averaging Duct Temperature Sensors

Installation and Operation

1 of 3 Catalog No. 11-808-631-01

Specifications subject to change without notice.

#20903 2/15/18

Overview

The Averaging Sensor is for duct mounting and temperature measurement of stratified air across the duct to give the average

temperature along the length of the sensor. The flexible probe is made of aluminum and made in different lengths for a custom duct fit.

Enclosure mounting styles come in plastic or metal for both NEMA 1 and NEMA 4 applications and are all plenum rated.

Figure1: Duct Unit with J-Box (Standard)

Part #s NSB-10K-2-A-8 (8 probe) NSB-10K-2-A-12 (12 probe) NSB-10K-2-A-24 (24 probe)

Figure 2: BB2 Enclosure Duct Unit

Part #s NSB-10K-2-A-8-BB2 (8 probe) NSB-10K-2-A-12-BB2 (12 probe) NSB-10K-2-A-24-BB2 (24 probe)

Figure 3: BB4 EnclosureDuct Unit

Part #s NSB-10K-2-A-8-BB4 (8 probe) NSB-10K-2-A-12-BB4 (12 probe) NSB-10K-2-A-24-BB4 (24 probe)

A Pierceable Knockout Plug (Part # NSB-PKP-100) is available for the open port in the BB4.

Specifications

Sensor Passive Thermistor 4 sensors in < 24 probes

9 sensors in > 24 probes Thermistor Thermal resistor (NTC) Temp. output Resistance, 10k Type 2 Accuracy (std) 0.36F, (0.2C) Stability < 0.036F/Year, (<0.02C/Year) Heat dissipation 2.7 mW/C Temp. drift <0.02C per year Probe range -40 to 221F (-40 to 105C)

Lead Wire 22AWG stranded, Etched Teflon, Plenum rated

Probe Flexible Aluminum tube, 0.19 OD Probe Length 8, 12, 24 per order Duct Gasket 1/4 Closed cell foam (impervious to mold) Mounting Extension tabs (ears), 3/16 holes

Enclosure Types J-Box With eight knockouts BB2 Box Withthree NPSM and three 1/2 drillouts BB4 Box With three drill-outs, one open port

Enclosure Ratings J-Box NEMA 1 BB2 Box NEMA 4X, IP66 BB4 Box IP10 (IP44 with Knockout Plug installed)

Enclosure Materials J-Box Galvanized steel, UL94H-B BB2 Box Polycarbonate, UL94V-0, UV rated BB4 Box Polycarbonate and Nylon, UL94V-0

Ambient (Enclosure) 0 to 100% RH, Non-condensing J-Box -40F to 212F, (-40 to 100C) BB2, BB4-40F to 185F, (-40 to 85C)

Agency RoHS, CE

Specifications subject to change without notice.

2 of 3 Catalog No. 11-808-631-01

Averaging Duct Temperature Sensors

Installation and Operation

Figure 7: BB2 Enclosure Mounting

Holes and installation.

#20903 2/15/18

Mounting

1. Place the sensor in the middle or top of the duct as shown in Figure 4 or Figure 5 so the flexible probe can enter the duct in a convenient place. Drill the probe and mounting holes as depicted for the enclosure being used.

2. Insert the probe by unrolling the sensor into the duct carefully to avoid kinking

the sensor. Serpentine the duct with the sensor at least twice across the stratified air in the duct to achieve the best average temperature reading.

At the sensor reversing points a turning bracket can be used to support the sensor and to avoid kinking the sensor.

3. Mount the enclosure to the duct using #8 screws through a minimum of two

opposing mounting tabs provided.

4. Snug up the sensors so that the foam backing is depressed to prevent air leakage but do not overtighten or strip the screw threads.

NOTES

Be sure to use caulk or Teflon tape for your conduit entries to maintain the appropriate NEMA or IP rating for your application.

Conduit entry for outdoor or wet applications should be from the bottom of the enclosure.

Figure 6: Junction Box

Mounting Holes and installation

Figure 4: Flexible Sensor Horizontal Mount (Best for Vertical Stratification)

Figure 5: Flexible Sensor Vertical Mount (Best for Horizontal Stratification)

Figure 8: BB4 Enclosure Mounting Holes and Installation

Specifications subject to change without notice.

3 of 3 Catalog No. 11-808-631-01

Averaging Duct Temperature Sensors

Installation and Operation

#20903 2/15/18

Wiring and Termination

Carrier recommends using twisted pair of at least 22AWG 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. Do NOT run this devices wiring in the same conduit as high or low voltage AC power wiring. Tests show that inaccurate signal levels are possible when AC power wiring is present in the same conduit as the sensor wires.

Diagnostics Problems: Controller reports higher or lower than actual temperature.

Possible Solutions: - Confirm the input is set up correctly in the front end software - Check wiring for proper termination and continuity. (shorted or open) - Disconnect wires and measure sensor resistance and verify the Sensor output is correct.