Carrier NSB-10K-2-STP Installation and Operation Manual PDF

Clamp-on and Strap Temperature Sensors Installation and Operation

1 of 4 Catalog No. 11-808-635-01

#20911 10/26/20

Overview Clamp-on Sensors are made for direct pipe mounting and temperature measurement of water pipe applications. These sensors are for mounting before any insulation is on the pipe.

Strap Sensors are spring-loaded units that are for mounting to pipes with up to 2 of insulation using a unique spring sensor extension. Enclosure mounting styles come in plastic or metal for both NEMA 1 and NEMA 4 applications and are all plenum rated.

Figure 1: Clamp-On with NEMA 1 J-Box (JB) Figure 2: Clamp-On with w/ NEMA 4 BB2 Box Part # NSB-10K-2-S | NSB-50K-S-C Part # NSB-10K-2-S-BB2

Figure 3: Clamp-On with NEMA 1 BB4 Box-Part # NSB-10K-2-S-BB4

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

Figure 4: Spring-Loaded Strap w/ NEMA 1 J-Box (JB) Part # NSB-10K-2-STP

Figure 5: Spring-Loaded Strap w/ NEMA 4 BB2 Box Part # NSB-10K-2-STP-BB2

Figure 6: Spring-Loaded Strap w/ NEMA 1 BB4 Box Part # NSB-10K-2-STP-BB4

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

Clamp-on and Strap Temperature Sensors Installation and Operation

Catalog No. 11-808-635-01 2 of 4

#20911 10/26/20

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 Copper sensor plate, 24 AWG, 1.25 diameter

Mounting Clamp-On (-S) Stainless steel worm gear

hose clamp Strap (-STP) 48 Nylon tie strap, 1/2 wide

Enclosure Types

J-Box (-JB) With eight knock-outs BB2 Box With three NPSM and three drill-

outs BB4 Box: With three drill-outs and one open

port

Enclosure Ratings J-Box (-JB) NEMA 1 BB2 Box NEMA 4, IP66, UV

Rated BB4 Box IP10 (with spring installed)

(IP44 without spring and with Knockout Plug installed in the open port)

Enclosure Material J-Box (-JB) 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 (-JB) -40F to 212F, (-40 to 100C)

BB2 Box -40F to 185F, (-40 to 85C)

BB4 Box -40F to 185F, (-40 to 85C)

Agency RoHS, CE

Specifications subject to change without notice.

Clamp-on and Strap Temperature Sensors Installation and Operation

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#20911 10/26/20

Mounting

2 Inch Insulation Cleaned of f To

The Pipe

Pipe

1.5 Inch Hole In The Insulation

Pipe

Bare Pipe Insulation

Insulation

Figure 7: Typical Clamp-On (-S) Installation Figure 8: Typical Spring-loaded (-STP) Installation

Application: This sensor reads the fluid temperature in a pipe by reading the temperature of the pipe. Properly installed strap sensors with insulation around the local strap-on sight will offer a very accurate temperature of the water inside the pipe to within .5 F or better of the inside pipe water temperature. Clamp-On Unit Installation: Figure 7 shows a typical installation for pipes from 2 to 4.5. Stripping away insulation is OK. Larger pipes can be accommodated by adding another, customer supplied, stainless steel hose clamp. 1. If there is insulation, clean away a section of the pipe insulation a minimum of 2 all around the pipe. The copper

sensor pad and SS strap must be in direct contact with the metal or plastic pipe. NOTE Nothing should be between the copper plate sensor and the bare pipe.

2. Tighten the clamp so that the sensor does not slide around the pipe and the foam is compressed no more than 50% allowing the copper sensor plate to form (bend) to the pipe curvature for maximum temperature conduction. Carrier recommends pre-forming the copper plate by bending it around the pipe with your fingers.

3. After the clamp-on sensor is securely mounted, add insulation a minimum of 1 thick and a minimum of 4 pipe diameters on each side of the copper sensor pad. (Example: A 2 pipe should have 8 of insulation on each side of the sensor). Only cover the sensor box to the top of the metal cover plate or to the BB door hinge so termination and servicing can be completed.

4. Terminate per the instructions in Wiring and Termination.

Strap Spring-loaded Unit Installation: Figure 8 shows a typical installation for insulated pipes from 5 to 14. Insulation thickness accommodated is 0.5 to 2.5. Larger pipes can be accommodated by adding another, customer supplied, tie rap strap. 1. Make a 1.5 inch diameter hole in the insulation where the sensor is to be placed and clean the pipe from debris.

Extend the spring so that the copper sensor pad is in direct contact with the metal or plastic pipe. NOTE No debris should be between the copper plate sensor and the bare pipe. The spring can retract to a minimum insulation thickness of ~.5 compressed to ~2.5 extended.

2. Position the box and sensor over the hole. 3. Tighten the strap so that the sensor spring is compressed no more than 50% allowing the copper sensor plate to form

(bend) to the pipe curvature for maximum temperature conduction. Carrier recommends pre-forming the copper plate by bending it around the pipe with your fingers. Extend the spring further by turning it clockwise if the copper sensor plate contact is questionable. The copper sensor plate must be in direct contact with the pipe.

4. After the strap sensor is securely mounted, add insulation back in (backfill) around the spring extension, using the removed insulation, so that no heat or cold from the pipe can escape.

5. If more insulation is desired, cover the sensor box only to the top of the metal cover plate or to the BB door hinge so termination and servicing can be completed.

6. Terminate per the instructions in Wiring and Termination.

Specifications subject to change without notice.

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Clamp-on and Strap Temperature Sensors Installation and Operation

#20911 10/26/20

Wiring and Termination Carrier recommends using twisted pair of at least 22 AWG for runs under 100 feet, and sealant filled connectors for all wire connections. Runs from 100 to 500 feet should use shielded 22 AWG. 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.

To Controller Analog Input (AI) (No Polarity)

To Controller Analog Input (AI) (No Polarity)

Figure 9: 2 Wire Lead Wire Termination for Thermistor or RTD

Diagnostics Possible Problem: Controller reports higher or lower than actual temperature