Carrier NSB-10K-2-H200 v2 Installation and Operation Manual

Outside Air Temperature Sensor

Installation and Operation

Specifications subject to change without notice.

1 of 2 Catalog No. 11-808-633-01

#20909 3/2/18

Overview

The Outside Air Temperature Sensor is a thermistor sensor for outside air mounting. The probe is made to protect the

sensor from rain, sleet, snow or bird droppings. The enclosure is NEMA 4 and UV rated.

Figure 1: Outside Air Sensor in a BB2 Enclosure Figure 2: Enclosure Installation Part # NSB-10K-2-O-BB2

Specifications

Sensor Passive, NTC, 2 wire

Thermistor Thermal resistor

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

Wire Insulation Etched Teflon, Plenum rated

Probe Vented polycarbonate shield, OD

Probe Length 1.2 w/ NPT threads

Mounting Extension tabs (ears), 3/16 holes

Wall Gasket Closed cell foam (impervious to mold)

Enclosure Type

BB2 Box With three NPSM & three drill- outs

Enclosure ratings NEMA 4, IP66

Enclosure materials Polycarbonate, UL94V-0, UV rated

Ambient (Enclosure) 0 to 100% RH, Non-condensing

-40F to 185F, (-40 to 85C)

Agency RoHS, CE

Outside Air Temperature Sensor

Installation and Operation

Specifications subject to change without notice.

2 of 2 Catalog No. 11-808-633-01

#20909 3/2/18

Mounting

Sensor location is critical to good performance. The sensor must be mounted in the shade away from building windows, doors or vents. It should never be in direct sunlight or you will have higher than expected temperature readings by as much as +30%. The ideal shaded location in the Northern hemisphere is on the North side of the building. In the Southern hemisphere, the South side of the building is ideal. The sensor shield and probe should always point down and be mounted between four feet above the ground/roof and one foot minimum below the eave. (NOTE Four feet keeps the sensor above the ground or roof top radiation and one foot under the eave prevents measurement of trapped heat from under the eave.) Drill the mounting holes and mount as shown in the Figure 2. Snug up the mounting screws to ensure that the foam backing compresses to about 50% of its thickness to make a gasket type seal against the wall surface. Route the wires into the box and terminate with sealant filled connectors to prevent water from attacking the connection, thereby preventing costly callbacks. Best practice is to caulk the wiring hole after the wiring is installed. Close the cover of the enclosure and secure with provided cover screws.

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 wir- ing 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

Possible Problem:

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 i