Honeywell T7984 C- Manual
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Table of Contents:
- Page 2 – SPECIFICATIONS; ORDERING INFORMATION
- Page 3 – INSTALLATION; Location; CAUTION
- Page 4 – WIRING; SEQUENCE
- Page 5 – DIP SWITCH SETTINGS
- Page 6 – DIP SWITCH SETTING
- Page 7 – Output 1, Modulating Analog Output 2 to
- Page 8 – Output 2, Modulating Analog Output 2 to; CHECKOUT; Service LED
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
check-out.
•
Locking cover and range stops are standard.
•
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
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Summary
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 ...
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 (...
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...
