T7771A Remote Temperature Sensor FEATURES PRODUCT DATA
Transcription
T7771A Remote Temperature Sensor FEATURES PRODUCT DATA
T7771A Remote Temperature Sensor PRODUCT DATA FEATURES • Pushbutton setpoint adjustment with LED indicators. • Occupied/unoccupied override (bypass) with LED. • LONWORKS® bus jack. • Operating range 45 to 99°F (7 to 37°C). GENERAL The T7771A Remote Temperature Sensors are direct wired wall modules for use with the Honeywell T7350 Commercial Programmable Thermostat. The T7771A has a space temperature sensor, LED pushbutton setpoint adjustment, and override with LED. IMPORTANT • The T7771 compatibility with the T7350 only applies to T7350 models with date code 0423 or later. • To ensure the purchase of a compatible T7350, order either: — Y7355B1002 (consisting of: T7350B Thermostat, T7771A and C7041B Sensors). — Y7355D1008 (consisting of: T7350D Thermostat, T7771A, C7041B Sensors). SPECIFICATIONS Construction: Two-piece construction, cover and internally wired subbase. Field wiring 14 to 22 AWG (2.0 to 0.34 sq. mm) connects to a terminal block in the subbase. Wall module is activated by plugging into prewired subbase. Relative Humidity: 5% to 95% noncondensing. Mounting Options: The T7771 can be mounted on a standard two by four inch junction box or on a 60 mm diameter junction box. Temperature Sensor Accuracy Dimensions (H/W/D): 5-1/16 x 3-1/8 x 1 in. (128 x 80 x 25 mm). Setpoint Adjustment: The setpoint offset allows for ±3°F from the programmed T7350 setpoint. Environmental Ratings: Operating Temperature: 45° to 99°F (7° to 37°C). Shipping Temperature: -40° to 150°F (-40° to 65°C). ® U.S. Registered Trademark © 2004 Honeywell International Inc. All Rights Reserved Temperature Sensor Operating Range: 45 to 99°F (10 to 37°C). T7771A 20K Ohm Nonlinearized Sensor: All T7771 models are furnished with a 20K Ohm nonlinear NTC temperature sensor that follows a specific temperature-resistance curve. See Fig. 1. Sensor accuracy at 77°F is ±0.36°F (±0.2°C) See form 63-7074 for detailed nominal temperature resistance output in table form. NOTE: In addition, a jumper allows for 10K Ohm output to accommodate using multiple sensors for temperature averaging applications with the T7350 Commercial Thermostat. See the Wiring section for details. 63-2617 T7771A REMOTE TEMPERATURE SENSOR 80K RESISTANCE (OHMS) 70K T7771A 60K STEP 1 50K Te m 40K Co pe ole ratu re No rm r Co ntr al W arm 30K 20K OHM AT 77oF (25oC) 20K ol er O n/O ff 10K 30 0 40 50 10 60 70 20 80 90 30 TEMPERATURE (DEGREES) 100 110 oF o 40 C M22172 M5874A STEP 2 Fig. 2. Cover disassembly. Fig. 1. Temperature vs. resistance for nonlinear sensor. Communications: Includes a LONMARK® bus communications port. If needed, the jack plug must be removed in the field, and terminals 1 and 2 wired according to the installation instructions to minimize installation errors due to miswiring. The recommended wire size for the LONMARK® bus is Level IV, 22 AWG (0.34 sq.mm) plenum or non-plenum rated, nonshielded, twisted pair, solid conductor wire. Wall Module Bypass Override/LED Operation When the T7771 override button is pushed, the T7350 setting changes to Temporary Occupied. If pressed again, the T7350 setting changes back to Occupied. The override button has no effect when the T7350 programmed setting is already Occupied. CAUTION Erratic System Operation Hazard. Failure to follow proper wiring practices can introduce disruptive electrical interference (noise). Keep wiring at least one foot away from large inductive loads such as motors line starters, lighting ballasts, and large power distribution panels. Shielded cable is required in installations where these guidelines cannot be met. Ground shield only to grounded controller case. IMPORTANT All wiring must comply with local electrical codes and ordinances or as specified on installation wiring diagrams. — Wall module wiring can be sized from 14 to 22 AWG (2.0 to 0.34 sq mm) depending on the application. — The maximum length of wire from a device to a wall module is 1000 ft (305m). — Twisted pair wire is recommended for wire runs longer than 100 ft (30.5m). — The cover for the wall module is packed separately from the subbase for ease of installation. BEFORE INSTALLATION Cover Disassembly One locking mechanism is used on the wall module cover. After installation, to disassemble the cover and the subbase see Fig. 2. See Fig. 3 to release/replace the subbase terminal block. ORDERING INFORMATION When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the TRADELINE® Catalog or price sheets for complete ordering number. If you have additional questions, need further information, or would like to comment on our products or services, please write or phone: 1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory). 2. Honeywell Customer Care 1885 Douglas Drive North Minneapolis, Minnesota 55422-4386 In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A. 63-2617 2 T7771A REMOTE TEMPERATURE SENSOR STANDARD UTILITY CONDUIT BOX PRESS SHADED AREA OF TAB WITH THUMB TO RELEASE TERMINAL BLOCK FOR EASIER WIRING SUBBASE NO. 6 SCREW FRONT COVER Te m M17988 Co pe ole ratu No re rm r Co ntr ol al W arm er Fig. 3. Releasing/replacing terminal block. O n/O ff INSTALLATION Te m CAUTION Co n/O SUBBASE ff M22173 Fig. 5. Mounting wall modules on standard utility conduit box or 60 mm wall outlet box. Wiring Attach the wires from the device sensor terminals to the appropriate wall module terminals. See Fig. 6. CAUTION Improper Electrical Contact Hazard. Screw type terminal blocks are designed to accept no more than one 14 AWG (2.5 sq mm) conductor. Connect multiple wires that are 14 AWG (2.5 sq mm) with a wire nut. Include a pigtail with this wire group and attach the pigtail to the individual terminal block. Wire the terminal blocks as follows: 1. For single wires, strip 3/16 in. (5 mm); for multiple wires going into one terminal, strip 1/2 in. (13 mm) insulation from the conductor. 2. If two or more wires are being inserted into one terminal, twist the wires together before inserting. 5-1/16 (128) 2-3/8 (60) NOTE: When two or more wires are being inserted into one terminal, be sure to twist them together. Deviation from this rule can result in improper electrical contact. See Fig. 9. STANDARD UTILITY CONDUIT BOX (2 X 4) MOUNTING HOLES 3. On/Off 4. 2-3/8 (60) al ol FRONT COVER KNOCKOUTS FOR EUROPEAN APPLICATIONS 3-3/16 (80) ntr 3.5 mm SCREW NOTE: See Fig. 4 for subbase mounting dimensions. Warmer rm 60 mm WALL OUTLET BOX Co er The wall module can be mounted on a wall, on a standard utility conduit box using No. 6 (3.5 mm) screws or on a 60 mm wall outlet box (see Fig. 5). When mounting directly on a wall, use the type of screws appropriate for the wall material. Cooler re r O Mount the T7771A Wall Module on an inside wall approximately 54 in. (1372 mm) from the floor (or in the specified location) to allow exposure to the average zone temperature. Do not mount the wall module on an outside wall, on a wall containing waterpipes or near air ducts. Avoid locations that are exposed to discharge air from registers or radiation from lights, appliances, or the sun. Normal ole ratu No W arm Equipment Damage Hazard. Electrostatic discharge can short equipment circuitry. Ensure that you are properly grounded before handling the unit. Touch only the plastic cover, casing, and buttons. Temperature Control pe Insert the wire in the required terminal location and tighten the screw to complete the termination. Verify wall module wiring with Fig. 6. NOTE: Wire the E-Bus using Level IV 22 AWG (0.34 sq mm) plenum or non-plenum rated, unshielded, twisted pair, solid conductor wire. 15/16 (23) M22174 Fig. 4. T7771A Subbase dimensions in in. (mm). 3 63-2617 T7771A REMOTE TEMPERATURE SENSOR Averaging Multiple Sensors The default position for the J2 jumper is 20K ohms. When using a single sensor, leave the jumper in this position. T7350 SUBBASE T4 For temperature averaging using a T7350 Commercial Thermostat and multiple sensors, use the following guidelines: — Only one T7771 can be used. — For the second sensor, use a T7770A3002 (which has a 10K ohm output). — Wire the two sensors in series. 1 T7771A T7770A1006 T4 T3 T3 T3 T4 20K OHM OUTPUT J2 20K OHM OUTPUT T7770A1006 T4 J2 T7770A1006 T3 T4 T3 GND E-BUS E-BUS 6 SETPT 7 SENSOR 8 STATUS 9 BYPASS J2 5 4 3 2 1 10K OHM OUTPUT 1 APPROPRIATE T7771A JUMPER POSITION FOR FOUR SENSOR TEMPERATURE AVERAGING. M22281 Fig. 8. Temperature averaging with four sensors. J2 M22175 Fig. 6. Wiring diagram for T7771A Wall Modules. 1/2 (13) T7350 SUBBASE T4 (13 MM) FROM WIRES TO BE ATTACHED AT ONE TERMINAL. CONTROLLER OR WALL MODULE E-BUS CONNECTOR TERMINALS 10K OHM OUTPUT T7771A T7770A3002 T4 1 T3 1. STRIP 1/2 IN. T3 T3 T4 2. TWIST WIRES J2 J2 TOGETHER WITH PLIERS (A MINIMUM OF THREE TURNS). 3. CUT TWISTED END OF WIRES TO 3/16 IN. (5 MM) BEFORE INSERTING INTO TERMINAL AND TIGHTENING SCREW. THEN PULL ON EACH WIRE IN ALL TERMINALS TO CHECK FOR GOOD MECHANICAL CONNECTION. M11413 1 APPROPRIATE T7771A JUMPER POSITION FOR TWO SENSOR TEMPERATURE AVERAGING. M22280 Fig. 7. Temperature averaging with two sensors. Fig. 9. Attaching two wires at wall module terminals. When all wiring is complete, attach the cover of the T7771A Wall Module by reversing step 2 of Fig. 2. By using this Honeywell literature, you agree that Honeywell will have no liability for any damages arising out of your use or modification to, the literature. You will defend and indemnify Honeywell, its affiliates and subsidiaries, from and against any liability, cost, or damages, including attorneys’ fees, arising out of, or resulting from, any modification to the literature by you. Automation and Control Solutions ACS Control Products Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell AG Böblinger Straße 17 D-71101 Schönaich Phone (49-7041) 637-01 Fax (49-7041) 637-493 63-2617 B.B. 6-04 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Scarborough, Ontario M1V 4Z9 www.honeywell.com