Page 2 - SPECIFICATIONS; ORDERING INFORMATION
T7984 A,B,C ELECTRONIC MODULATING CONTROL THERMOSTATS SPECIFICATIONS IMPORTANT The specifications given in this publication do not include normal manufacturing tolerances. Therefore, this unit may not exactly match the listed specifications. Also, this product is tested and calibrated under closely ...
Page 3 - INSTALLATION; Location; CAUTION
T7984 A,B,C ELECTRONIC MODULATING CONTROL THERMOSTATS Table 2. Option Settings Parameter Selection T7984 Model A B C Reheat Time Constant 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 (...
Page 4 - WIRING; SEQUENCE
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 setpoint limit Cooling and/or heating X X WIRING To install a remote duct or room temperature sensor, adust D...
Page 5 - DIP SWITCH SETTINGS
T7984 A,B,C ELECTRONIC MODULATING CONTROL THERMOSTATS 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 setpoint limit Cooling Heating Mode A (Jumper out) X X X Heating Cooling Mode B (Jumper in) WIRING To install...
Page 6 - DIP SWITCH SETTING
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 setpoint limit Cooling and Heating Heating only X X X X WIRING To install a remote duct or room tempera...
Page 7 - Output 1, Modulating Analog Output 2 to
T7984 A,B,C ELECTRONIC MODULATING CONTROL THERMOSTATS Output 1, Modulating Analog Output 2 to 10Vdc (T7984 All) Main output of the thermostat. On the T7984 series that output is modulating PI analog (2 to 10 Vdc). That signal uses a variable Vdc signal for the control of analog damper actuator and a...
Page 8 - Output 2, Modulating Analog Output 2 to; CHECKOUT; Service LED
T7984 A,B,C ELECTRONIC MODULATING CONTROL THERMOSTATS Output 2 On/Off (T7984B only) A 24 Vac on/off output which is normally used to control terminal reheat in a zoned system. Example: electric base board relay, electric duct heater relay, perimeter on/off 24 Vac valve, etc. This output can also be ...