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Honeywell T8700B manual

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Table of contents for the manual

  • Page 1

    PRODUCT DA T A ® U.S. Registered Trademark Copyright © 1998 Honeywell Inc. • • All Rights Reserved T8700B,C An Electronic Round ™ Programmable Thermostat APPLICA TION The T8700 Electronic Round™ Programmab le Ther mostats provide single-stage , programmable temperature control f or 24V heating and/or cooling systems. See T able 1 f or mod[...]

  • Page 2

    T8700B,C AN ELECTR ONIC ROUND™ PR OGRAMMABLE THERMOST A T 68-0197—1 2 ORDERING INFORMA TION When purchasing replacement and modernization products from your TRADELINE® wholesaler or distr ib utor , refer to the TRADELINE® Catalog or price sheets for the complete ordering number . 1. Order number . 2. Accessor y , if desired. If you ha ve addi[...]

  • Page 3

    T8700B,C AN ELECTR ONIC ROUND PR OGRAMMABLE THERMOST A T 68-0197—1 3 INST ALLA TION When Installing this Product… 1. Read these instructions carefully . F ailure to follo w them could damage the product or cause a hazardous condition. 2. Check the r atings given in the instructions and on the product to make sure the product is suitab le for y [...]

  • Page 4

    T8700B,C AN ELECTR ONIC ROUND™ PR OGRAMMABLE THERMOST A T 68-0197—1 4 Fig. 3. Mounting decorator co ver plate and wallplate on wall (T8700C shown). W iring CA UTION Damage T o Heating/Cooling System Possib le . Be careful when handling wires during installation. Disconnect power at furnace or at main breaker/fuse bo x. IMPORT ANT Use an 18-gaug[...]

  • Page 5

    T8700B,C AN ELECTR ONIC ROUND PR OGRAMMABLE THERMOST A T 68-0197—1 5 Fig. 7. T8700C heat-cool wiring diagram in single trans- f ormer system with gas or electric heat/electric cooling. Fig. 9. T8700B1007 Heat Only wiring diagram in electric baseboard or ceiling cab le system. Fig. 8. T8700C heat-cool wiring diagram in oil heating/electric cooling[...]

  • Page 6

    T8700B,C AN ELECTR ONIC ROUND™ PR OGRAMMABLE THERMOST A T 68-0197—1 6 Adjust Fan Operation Switch The ther mostat f an operation s witch, labeled Fuel switch, is set at the factory in the F position. See Fig. 12. This is the correct setting for most systems . If this system is an electric heat system, set the switch to the E position. The E set[...]

  • Page 7

    T8700B,C AN ELECTR ONIC ROUND PR OGRAMMABLE THERMOST A T 68-0197—1 7 2. Set your W AKE time. a. Press the ke y once. Y ou will see a flashing W AKE time. b. Use the or ke ys to set your desired W AKE time. The W AKE time is now set. 3. Set your W AKE temperature. a. Press the ke y once. Y ou will see a flashing W AKE temperature. b. Use the or ke[...]

  • Page 8

    T8700B,C AN ELECTR ONIC ROUND™ PR OGRAMMABLE THERMOST A T 68-0197—1 8 3. Select Fahrenheit - Celsius T emperature. a. Press to display the current ° F or ° C setting. b. Use or to choose between ° C and ° F. 4. Clock Format. a. Press to display the current 12- or 24-hour clock setting. b. Use or to choose either a 12- or 24-hour clock f or [...]

  • Page 9

    T8700B,C AN ELECTR ONIC ROUND PR OGRAMMABLE THERMOST A T 68-0197—1 9 OPERA TION Zero Droop Performance The T8700 Ther mostat can control temper ature closer to setpoint than electromechanical thermostats. This is because propor tional plus integr al control (P + I) maintains a constant indoor temperature independent of the outdoor temperature . T[...]

  • Page 10

    T8700B,C AN ELECTR ONIC ROUND™ PR OGRAMMABLE THERMOST A T 68-0197—1 10 Ta b le 5. Sequence of Operations. a When fuel s witch is in the E position. (T8700B with F an and T8700C). b T8700C only . Fan Switch Settings System Switch Settings Call for Action Energize Terminals Display Icons AUTO OFF None None None ON Any Any G None AUTO COOL b Cooli[...]

  • Page 11

    T8700B,C AN ELECTR ONIC ROUND PR OGRAMMABLE THERMOST A T 68-0197—1 11 TROUBLESHOOTING Symptom Possible Cause Corrective Action Heating/cooling equipment does not operate. No ac power. Check power to heating/cooling equipment: — On/Off switch. — Fuse or circuit breaker. — Loose 24V connection: at thermostat; at furnace/air conditioner. — I[...]

  • Page 12

    T8700B,C AN ELECTR ONIC ROUND™ PR OGRAMMABLE THERMOST A T 68-0197—1 12 Honeywell Europe S.A. 3 Avenue du Bourget 1140 Brussels Belgium Honeywell Asia Pacific Inc. Room 3213-3225 Sun Hung Kai Centre No. 30 Harbour Road Wanchai Hong Kong Home and Building Control Honeywell Limited-Honeywell Limitée 155 Gordon Baker Road North York, Ontario M2H 3[...]