Honeywell T7984 A 사용자 설명서

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 (3°C) heat/cool offset, or 

10°F (5°C) setback / cooling 

shutdown 

Main Sensor  Remote or internal 

Install the thermostat about 5 ft. (1.5 m) above the floor in an 

area with good air circulation at average temperature 

conditions. 

Do not install thermostat where it may be affected by: 

•   drafts, or dead air spots behind doors and in corners. 

•   hot or cold air from ducts. 

•   radiant heat from sun or appliances. 

•   concealed pipes and chimneys. 

•   unheated (cooled) areas such as an outside wall behind the 

thermostat. 

The thermostat can be mounted directly on the wall with or 

without a wallplate or a standard single gang electrical box, or 

double gang with adaptor plate (accessory part 272846). 

Typical wiring connections are shown in Fig.2 to Fig.7.  Wiring 

connections may be made to the screw terminal block with 2-

18AWG or 1-14AWG, solid or stranded copper wires.  Connect 

the system wires to the thermostat terminals. Push excess wire 

back into hole. Plug hole to prevent drafts. 

Auxiliary screw terminal strip may be used in a junction box 

when the application requires multiple wires to be brought 

down at the thermostat. This can make troubleshooting, 

startup and servicing easier. 

T7984 thermostats must be configured for proper operation by  

setting DIP switches.  

T7984B 

Reheat output control action: 7.5 or 15 minutes.  

T7984B,C 

Zero energy band (ZEB): 3°F (2°C) or 5°F (3°C) 

Setpoint adjustment: cooling,centred, heating centred with limit 

override for commissioning.  

Night setback amount: see Table 2 for complete listing of 

option settings.  

T7984A,B,C 

Main sensor, internal or remote.  

OUTPUT 2 ON/OFF CPH 

T7984B only  

For more information, see on/off output cycle per hour application note.  

CYCLES/HOUR 

S1 

FAST   8 CPH 

1 

SLOW   4 CPH 

0 

It is possible to fix the number of times per hour the on/off 
output will be energized. 

ZERO ENERGY BAND 

T7984B & C only 

ZEB 

S2 

5°F  (3°C) 

1 

3°F  (1.5°C) 

0 

On models which have 2 outputs, 1 for cooling and 1 for 
heating, it is possible to adjust the zero energy band value 
(dead band between heating and cooling endpoints). 

SETPOINT DIAL DEFINITION 

T7984B & C only 

For more information, see setpoint dial definition & setpoint limitation application note. 

Models with cooling and heating outputs 

»  Setpoint dial centered, 75˚F limitation not active. 

»  Setpoint dial defined as heating, 75˚F limitation active. 

DEFINITION 

S3 

S4 

75°F OVERRIDE 

1 

1 

HEATING DIAL 

0 

1 

COOLING DIAL 

1 

0 

CENTERED HC 

0 

0 

»  Setpoint dial defined as cooling, 75˚F limitation active. 

»  Setpoint dial centered, 75˚F limitation active. 

DAY/NIGHT SETBACK 

T7984B & C only 

HEAT SETBACK 

COOL SETUP 

S5 

10°F  (5°C) 

20°F  (10°C) 

1 

5°F  (3°C) 

5°F  (3°C) 

0 

Night mode setpoints can be adjusted 
to different values depending on the 
application. 

REMOTE SENSOR 

T7984A, B & C  

On model T7984A, switch S7 & S8 are not used.  

MAIN SENSOR 

LOCAL INTERNAL 
REMOTE SENSOR 

For duct return air or remote room sensor control only. 

1 

S6 

Do not use remote sensor in supply or discharge air 

0 

control applications. 

ON = 1 

OFF = 0  1  2  3  4  5  6 

3  

95C-10815–2