Honeywell T7984 C User Manual
T7984 A,B,C Electronic Modulating Control
Thermostats
PRODUCT DATA
APPLICATION
These microprocessor-based thermostats provide
proportional - integral (PI) individual room temperature control
in zoned commercial Heating, Ventilating, and Air
Conditioning systems such as hydronic heating and/ or
cooling, pressure dependent VAV or by-pass box with or
without terminal reheat.
The T7984 family provides modulating analog 2 to 10 Vdc
control. Optional features include automatic heat/ cool
changeover, reheat control, remote night setback with local
timed override, and remote sensor on VAV models.
FEATURES
• PI (proportional and integral) control action provides
accurate, stable room temperature control.
• T7984 models are used with Series 70 direct-coupled
damper actuators such as ML7161 or ML7984, or with
valve actuators such as ML7285, ML7421, VC7930 or
M7410.
• All models feature user-friendly set point knob.
• All models feature output status LEDs for installer
• All models feature output status LEDs for installer
check-out.
• Locking cover and range stops are standard.
• Night setback models feature selection of two different
• Night setback models feature selection of two different
offset temperatures and use central time switch
control.
• Night setback models feature 2 1/2 hour local timed
override.
• Heat/cool models feature automatic changeover with
3° or 5°F (1.5°C or 3°C) selectable Zero Energy Band
(Z.E.B.) to meet requirements of ASHRAE 90.1
• Heat/cool models have installer-definable setpoint at
midpoint of Z.E.B, at heating setpoint, or at cooling
setpoint.
• Reheat models feature fast/slow response selection to
match heating system dynamics.
• DIP switch selectable 75°F (24°C) high limit heating
setpoint and low limit cooling setpoint.
• Horizontal and vertical covers included.
Contents
Application......................................................................... 1
Features ............................................................................ 1
Specifications .................................................................... 2
Ordering Information ......................................................... 2
Installation ......................................................................... 3
T7984A.............................................................................. 4
T7984B.............................................................................. 5
T7984C.............................................................................. 6
Checkout ........................................................................... 8
95C-10815-2