Building Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USATel:+1-608-735-4800 • Fax+1-608-735-4804 • E-mail:sales@bapihvac.com • Web:www.bapihvac.comSpecifications subject to change without notice.1 of 3 Installation & OperationsString-Loaded Strap and Clamp-On Strap Temperature Transmitters in a BAPI-Box Crossover Enclosure37727_ins_strapclamp_active_bbxrev. 11/07/17Strap Unit Temperature Transmitters in the BAPI-Box Crossover enclosure are available with a 4 to 20mA output. They can be ordered with a 1KΩ Platinum RTD or special high accuracy RTD matched transmitters which match the sensor to the transmitter for improved accuracy. Strap Sensors are made for direct pipe mounting and temperature measurement of water pipe applications. The Clamp-On units are for mounting before any insulation is on the pipe and the Spring-Loaded units are for mounting to pipes with up to 2” of insulation using a unique spring sensor extension. Strap units are available in multiple thermistor or RTD types as shown in the specifications. The BAPI-Box Crossover enclosure has a hinged cover and comes in IP10 or IP66/NEMA4X rated models. The IP66/NEMA 4X version includes a watertight cover gasket and pierceable knockout plug for the open port.This instruction sheet is specific to units with the BAPI-Box Crossover Enclosure. For other enclosures, please refer to instruction sheet “20922_ins_Strap on_Active.pdf” which is available on the BAPI website or by contacting BAPI.Overview and IdentificationFig. 1: Spring-Loaded (right) and Clamp-On Strap Sensors in a BAPI-Box Crossover EnclosureMounting of Clamp-On Strap UnitsThis sensor technique is for reading 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. 1. Fig 2 shows a typical installation for pipes from 2” to 4.5”. Stripping away insulation is OK. 2. Larger pipes can be accommodated by adding another, customer supplied, stainless steel hose clamp extending the possible pipe diameter. 3. 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. Nothing should be between the copper plate sensor and the bare pipe.4. Tighten the strap-so that the sensor does not rotate around the pipe and so that the foam is compressed not more than 50% allowing the copper sensor plate to form (bend) to the pipe curvature for maximum temperature conduction. BAPI recommends pre-forming the copper plate by bending it around the pipe with your fingers.5. After the 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 door hinge.Fig 2: Clamp-On Strap with BAPI-Box Crossover Enclosure installation2 Inch Insulation Cleaned off To The PipePipeInsulationBare PipeBuilding Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USATel:+1-608-735-4800 • Fax+1-608-735-4804 • E-mail:sales@bapihvac.com • Web:www.bapihvac.comSpecifications subject to change without notice.2 of 3 Installation & OperationsString-Loaded Strap and Clamp-On Strap Temperature Transmitters in a BAPI-Box Crossover Enclosure37727_ins_strapclamp_active_bbxrev. 11/07/17This sensor technique is for reading 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. 1. Fig 3 shows a typical installation for insulated pipes from 5” to 14” and insulation thickness from 0.5” to 2.5”. 2. Larger pipes can be accommodated by adding another, customer supplied, tie rap strap extending the possible pipe diameter. 3. 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 the copper sensor pad is in direct contact with the metal or plastic pipe. 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. 4. Position the box and sensor over the hole. 5. 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. BAPI 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.6. After the strap on 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. 7. If more insulation is desired, only cover the sensor box to the top of the door hinge.Fig 3: Spring-Loaded Strap with BAPI-Box Crossover Enclosure installation1.5 Inch Hole In The InsulationPipeInsulationMounting of Spring-Loaded Strap UnitsWiring & TerminationBAPI recommends using twisted pair of at least 22AWG 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. Do NOT run this device’s wiring in the same conduit as high or low voltage AC power wiring. BAPI’s tests show that inaccurate signal levels are possible when AC power wiring is present in the same conduit as the sensor wires.Fig. 5: Transmitter with Flying LeadsFactory Wired Sensor4 to 20mA Signal, To Analog Input of ControllerPower Supply, 10 to 40 VDCFig. 6: Transmitter with TerminalsFactory Wired Sensor4 to 20mA Signal, To Analog Input of ControllerPower Supply, 10 to 40 VDCNote: Green LED on cover face will light when power is applied.Used for Factory Calibration OnlyUsed for Factory Calibration OnlyBuilding Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USATel:+1-608-735-4800 • Fax+1-608-735-4804 • E-mail:sales@bapihvac.com • Web:www.bapihvac.comSpecifications subject to change without notice.3 of 3 Installation & OperationsString-Loaded Strap and Clamp-On Strap Temperature Transmitters in a BAPI-Box Crossover Enclosure37727_ins_strapclamp_active_bbxrev. 11/07/17RTD Transmitter Power Required: .........10 to 40VDC Output: ........................4 to 20mA, 850Ω@24VDC Output Wiring: .............2 wire loop Output Limits: .............<1mA (short), <22.35mA (open) Span: ..........................Min. 30ºF (17ºC), Max 1,000ºF, (555ºC) Zero: ...........................Min. -148°F (-100°C), Max 900ºF (482ºC) Zero & Span Adjust:.....10% of span Accuracy: ....................±0.065% of span Linearity: .....................±0.125% of span Power Output Shift: ....±0.009% of span RTD Sensor: ...............2 wire Platinum (Pt), 385 curve Transmitter Ambient.....-4 to 158ºF(-20 to 70ºC) 0 to 95% RH, Non-condensing)RTD Sensor: Resistance Temp Device (Bare Sensor) Platinum (Pt): ..............1KΩ @0ºC, 385 curve Pt Accuracy (Std): .......0.12% @Ref, or ±0.55ºF, (±0.3ºC) Pt Accuracy (High): .....0.06% @Ref, or ±0.277ºF, (±0.15ºC), [A]option Pt Stability: ..................±0.25ºF, (±0.14ºC) Pt Self Heating: ...........0.4 ºC/mW @0ºC Pt Probe Range: .........-40º to 221ºF, (-40 to 105ºC)SpecificationsBAPI-Box Crossover Enclosure Ratings: BBX Unit without Cover Gasket or Knockout Plug IP10, NEMA 1 BBX6 Unit with Cover Gasket and Knockout Plug IP66, NEMA 4XBAPI-Box Crossover Enclosure Material: UV-resistant polycarbonate & Nylon, UL94V-0Environmental Operating Range: -40 to 185ºF (-40 to 85ºC) 0 to 100% RH, Non-condensingLead Wire: 22AWG strandedWire Insulation: Etched Teflon, Plenum ratedProbe: Copper sensor plate, 24 AWG, 1.25” diameterMounting Clamp-On Unit: 1/2” SS worm gear hose clamp Spring-Loaded Unit: 48” Nylon tie strap, 1/2” wideAgency: RoHSPT= DIN43760, IEC Pub 751-1983, JIS C1604-19894 to 20mA Temperature EquationT = TLow + (A -4) x (TSpan) 16T = Temperature at sensorTLow = Low temperature of spanTHigh = High temperature of spanTSpan = THigh - TLowA = Signal reading in mAPossible Solutions:- Measure the power supply voltage by placing a multi-meter across the transmitter’s “Power” and “Sig/Gnd” leads or terminals. Make sure that the power is 10 to 40 VDC.- Make sure that the “Power” and “Signal/Gnd” wires are not open or shorted together and are terminated correctly to the controller.- Determine if the input is set up correctly in the BAS and controller’s software.- Compare the transmitted current to the actual temperature measurement at the sensor location. Measure the physical temperature at the temperature sensor’s location using an accurate temperature standard. Measure the transmitter current by placing an ammeter in series with the controller input. The current should read according to the “4 to 20mA Temperature Equation” shown at right. If the measured resistance is different from the temperature table by more than 5% call BAPI technical support.DiagnosticsPossible Problems:Green power LED is not on.The reading is incorrect in the controller.Next >