Honeywell T7984 B manual

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Table of contents for the manual

  • Page 1

    T7984 A,B,C Electronic Modulating Control Thermostats PRODUCT DATA APPLICA TION These microprocesso r-based thermost ats provide proportional - integral (PI) i ndividual room temp erature control in zoned commercial Heating, V entilating, and Air Conditioning systems such as hydronic he ating and/ or cooling, pressure dep endent V A V or by-pass bo[...]

  • Page 2

    T7984 A,B,C ELECTRONIC MODULATING CONTROL THERMOSTATS SPECIFICATIONS IMPORTANT The specifications gi ven in this publicat io n do not include normal manufactu ring tole rances. Therefore, this unit may not exactly match the listed specif ications. Also, this product is tested and ca librated under closely controlled conditions, and some minor diffe[...]

  • Page 3

    T7984 A,B,C ELECTRONIC MODULA TING CONTROL T HERMOSTAT S T able 2. Option Settings Parameter Selection T7984 Model A B C Reheat T ime Const ant Fast (7.5 min.); or Normal (15 min.) • Zero Energy Band 3°F (1.5°C); or 5°F (3°C) • • Setpoint Definition Heating; Cooling or H/C midpoint • • Night Setback 5°F (3°C) hea t/cool of fset, or [...]

  • Page 4

    T7984 A,B,C ELECTRONIC MODULATING CONTROL THERMOSTATS T7984A Output 1 analog 2œ10V Output 2 on/off Mode input jumper Changeover input for Out 1 Day/Night mode (NSB) Remote sensor option 75°F setpoi nt limit Cooling and/or heating X X WIRING T o in stall a remote duct or room temperature se nsor , adust DIP the screw terminals and wire as shown. s[...]

  • Page 5

    T7984 A,B,C ELECTRONIC MODULA TING CONTROL T HERMOSTAT S T7984B Output 1 analog 2œ10V Output 2 on/off Mode input jumper Changeover input for Out 1 Day/Night mode (NSB) Remote sensor option 75°F setpoi nt limit Cooling Heating Mode A (Jumper out) X X X Heating Cooling Mode B (Jum per in) WIRING T o install a remote duct or room temperature sensor [...]

  • Page 6

    T7984 A,B,C ELECTRONIC MODULATING CONTROL THERMOSTATS T7984C Output 1 analog 2œ10V Output 2 analog 2œ10V Mode input jumper Changeover input for Out 1 Day/Night mode (NSB) Remote sensor option 75°F setpoi nt limit Cooling and Heating Heating only X X X X WIRING T o in stall a remote duct or room temperature se nsor , adust DIP the screw terminals[...]

  • Page 7

    T7984 A,B,C ELECTRONIC MODULA TING CONTROL T HERMOSTAT S Output 1, Modulating Analog Output 2 to 10Vdc (T7984 All) Main output of the thermostat. On the T7984 series tha t output is modulating PI analog (2 to 10 Vdc). That signal uses a variable Vdc signal for the control of analog damp er actuator and analog valve actuator . This type of ou tput o[...]

  • Page 8

    T7984 A,B,C ELECTRONIC MODULATING CONTROL THERMOSTATS Output 2 On/Off (T7984B only) A 24 V ac on/off output which is normally used to control terminal reheat in a zoned system. Example: electric base board relay , electric duct heater relay , perim eter on/off 24 V ac valve, etc. This output can also be used for cooling applicati ons with the mode [...]