Thermobuffer Temperature Sensors Building Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USA Tel:+1-608-735-4800 • Fax+1-608-735-4804 • E-mail:sales@bapihvac.com • Web:www.bapihvac.com Specifications subject to change without notice. Installation and Operation Instructions rev. 02/10/2119817_Ins_thermo_buffer 1 of 4 Overview and Identification The BAPI Thermobuffer Temperature Sensor is used to simulate the refrigerator contents rather than the refrigerator air temperature. The fluid-filled chamber allows for slower reaction to abrupt temperature changes, yet still maintains long- term accuracy if the change remains permanent. It eliminates the temperature spikes due to frequent refrigerator or freezer door opening and decreases false alarms. The Thermobuffer comes in three buffer sizes 1”, 2” and 4” and is designed to save valuable shelf space by mounting to the wall or by hanger in a refrigerator or freezer. The buffer chamber is machined in 304 Stainless Steel or aluminum and accommodates a variety of temperature sensors or transmitters to interface with all BAS systems. The unit is available with multiple thermistors or RTDs as shown in the specifications. The mounting enclosure styles come in NEMA 4 plastic or hanging bracket with the buffers available in stainless steel or aluminum to fit any application. This instruction sheet is specific to the sensor with the BAPI-Box, BAPI-Box 2 or Hanging Bracket. For units with a BAPI-Box Crossover enclosure, please refer to instruction sheet “37718_ins_thermobuffer_passive_bbx.pdf” which is available on the BAPI website or by contacting BAPI. Fig 3: Hanging Bracket Unit Fig 1: BAPI-Box (BB) Enclosure Fig 1: BAPI-Box 2 (BB2) EnclosureThermobuffer Temperature Sensors Building Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USA Tel:+1-608-735-4800 • Fax+1-608-735-4804 • E-mail:sales@bapihvac.com • Web:www.bapihvac.com Specifications subject to change without notice. Installation and Operation Instructions rev. 02/10/2119817_Ins_thermo_buffer 2 of 4 Fig 8: No Box (NB) Thermobuffer Installation Assembly & Installation 1.Fill the buffer chamber with the appropriate amount of customer provided glycol to the amount as dictated by table 1. 2.Wrap the probe threads with Teflon tape with at least 4 wraps so a water tight seal is established. 3.Insert the probe into the buffer chamber and screw in for a secure water tight fit. 4.Towel off excess fluid which may leak out during assembly and check for leaking. If the assembly leaks, a 15/16ths wrench may be used to snug up the probe to the buffer chamber. More tape may also be needed. The use of food safe silicon may also be used. 5.Select a location on a wall or hanging from a wire rack near the contents you wish to monitor. 6.Mount the thermobuffer with the buffer chamber facing down (Probe on top). Any other orientation is not recommended due to leaking concerns. 7.We recommend BAPI-Box surface mounting be positioned over the refrigerator wireway hole using the rear BAPI-Box knock out. Pull the wiring into the unit and terminate using sealant filled connectors. Best practice is to caulk the wiring hole after the wiring is installed. Secure with mounting screws and ensure that the foam backing compresses to about 50% of its thickness to make a gasket type seal against the surface. Fig 4: BAPI-Box (BB) Enclosure Installation Fig 6: Hanging Bracket Rack Installation 1/2” NPT Pipe (Customer Provided) Wire Termination Within Pipe 1/2” NPT Nipple (Customer Provided) BAPI Sensor BAPI Buffer Chamber Fig 5: BAPI-Box 2 (BB2) Enclosure Installation Fig 7: Hanging Bracket Wall Installation (Customer Provided Screws)Thermobuffer Temperature Sensors Building Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USA Tel:+1-608-735-4800 • Fax+1-608-735-4804 • E-mail:sales@bapihvac.com • Web:www.bapihvac.com Specifications subject to change without notice. Installation and Operation Instructions rev. 02/10/2119817_Ins_thermo_buffer 3 of 4 Wiring & Termination BAPI 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. 9: Two Wire Termination for Thermistor or RTDFig. 10: Three Wire Termination for RTD Sensor Sensor To Controller Analog Input (AI) (No Polarity) To 3 Wire Transmitter To 3 Wire Transmitter To Controller Analog Input (AI) (No Polarity) Fig. 11: Terminal Strip (-TS) Option for Two Wire Sensor Termination Fig. 12: Terminal Strip (-TS) Option for Three Wire Sensor Termination Fig. 13: Test & Balance (-TB) Option for Two Wire Sensor Termination Fig. 14: Test & Balance (-TB) Option for Three Wire Sensor Termination Sensor Type Low Temp (40° F) Resistance Value High Temp (105°F) Resistance Value 1000Ω RTD1.02KΩ (41.20°F)1.15KΩ (101.5°F) 3000Ω Thermistor7.87KΩ (39.8°F)1.5KΩ (106.8°F) 10K-2 Thermistor30.1KΩ (34.9°F)4.75Ω (109.1°F) 10K-3 Thermistor26.7KΩ (35.9°F)5.11KΩ (108.4°F) 10K-3(11K) Thermistor7.32KΩ (43.7°F)3.65Ω (105.2°F) TEST AND BALANCE SWITCH: For units with a Test and Balance Switch, the Norm position allows the real sensor at be monitored at “Sensor A Out”. The High position forces the “Sensor A Out” to a very hot reading and the Low position forces “Sensor A Out” to a very cold reading (see Table at right).Thermobuffer Temperature Sensors Building Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USA Tel:+1-608-735-4800 • Fax+1-608-735-4804 • E-mail:sales@bapihvac.com • Web:www.bapihvac.com Specifications subject to change without notice. Installation and Operation Instructions rev. 02/10/2119817_Ins_thermo_buffer 4 of 4 Sensor: Passive Thermistor...........NTC, 2 Wire RTD.....................PTC, 2 or 3 Wire Thermistor: Temp. Output.......Resistance Accuracy (Std).....±0.36ºF, (±0.2ºC) Accuracy (High)...±0.18ºF, (±0.1ºC) Stability ...............< 0.036ºF/Year, (<0.02ºC/Year) Heat dissipation ..2.7 mW/ºC Temp. Drift...........<0.02ºC Per Year Probe range ........-40º to 221ºF (-40º to 105ºC) RTD: Platinum 1K, 1K[375], 1K[A] 1K .......................1KΩ @0ºC, 3.85Ω/ºC Curve 1K[375] ...............1KΩ @0ºC, 3.75Ω/ºC Curve 1K[A] ...................1KΩ @0ºC, 3.85Ω/ºC Curve, High Accuracy RTD Accuracy..............0.12% @Ref, or ±0.55ºF, (±0.3ºC) Accuracy 1K[A].....0.06% @Ref, or ±0.277ºF (±0.15ºC) Range..................-40º to 221ºF, (-40 to 105ºC) RTD: Extreme Temperature Platinum 1K[1] 1K[1] ...................1KΩ @0ºC, 385 Curve Range...................-328º to 32ºF, (-200 to 0ºC) RTD: Nickel 1K[NI] 1K[NI] ...................1KΩ @70ºF, 2.95Ω/ºF JCI Curve Range..................-40º to 221ºF (-40 to 105ºC) RTD: All RTDs Stability ...............±0.25ºF, (±0.14ºC) Self Heating ........0.4 ºC/mW @0ºC Wire: 22 AWG Stranded, 2 or 3 Wires Insulation:Etched Teflon or FEP-Jacketed; PTFE for 1K[1] Wiring to Probe: 1K[1] Extreme Temp Probe - PTFE Jacketed Cable Probe: 304 Stainless Steel (SS), 0.25” OD Probe Process Connection: 304 SS Double threaded ½” NPT Probe Length: Probe tip to thread start 1”.........................0.75” 2”.........................3.5” 4”.........................5.5” Buffer Chamber Dimensions: 1” Buffer...............2.75”H x 1”Dia 2” Buffer...............5.1”H x 1”Dia 4” Buffer...............7.1”H x 1”Dia Liquid Fill: Food Grade Glycol (Customer provided) 1” Buffer...............5 mL 2” Buffer...............20 mL 4” Buffer...............30 mL Buffer Chamber Construction: M304....................Machined 304 Stainless Steel, 0.7” core MAL.....................Machined Aluminum, 0.7” core Mounting: BAPI-Boxes.........4 extension tabs (ears), 7/16” hole Hanging Bracket..SS bracket w/ 1/8” holes or 3/8” spring clip Enclosure Type: No Box ................Intended for direct ½” NPT pipe mount BAPI-Box: ...........Four ½” NPSM ports & one ½” drill-out BAPI-Box 2: ........Three ½” NPSM ports & three ½” drill-outs Hanging Bracket..Intended to hang from shelving Enclosure Rating: No Box ................No rating BAPI-Boxes ........NEMA 4, IP66 Hanging Bracket..No rating Enclosure Material: BAPI-Boxes ........Polycarbonate, UL94V-0, UV rated Hanging Bracket..304 Stainless Steel bracket and clip Environmental Op. Range: 0 to 100% RH, Non-condensing Standard Temp Sensor Units: BAPI-Box and BAPI-Box 2: -40ºF to 185ºF (-40º to 85ºC) No Box: -40ºF to 212ºF (-40º to 100ºC) Hanging Bracket: -40ºF to 122ºF (-40º to 50ºC) Temp Transmitter Units: -4 to 158ºF (-20 to 70ºC) Extreme Temp Sensor Units: -328 to 32°F (-200 to 0°C) Agency: RoHS, CE (Thermistors 10KΩ or smaller) Pt= DIN43760, IEC Pub 751-1983, JIS C1604-1989 Specifications Diagnostics Possible Solutions: -Confirm the input is set up correctly in the front end software -Check wiring for proper termination & continuity (shorted or open) - For units with a Test & Balance Switch, verify that it is in the center position. -Disconnect wires and measure the sensor resistance and verify that the sensor resistance is correct as compared to the temperature/resistance table for that sensor. The temperature/resistance tables are available on the BAPI website at www.bapihvac.com in the “Resource Library” under “Sensor Specs”. If the measured resistance varies by more than 5% from the table, call BAPI technical support. Possible Problems: Controller reports higher or lower than actual temperature Next >