T7984B - Honeywell T7984 A Product Data

T7984B

Output 1 analog Output 2
2œ10V on/off
Cooling Heating
Heating Cooling
WIRING
To install a remote duct or room temperature sensor, adjust
DIP switch S6 to 0 = off and wire as shown.
Duct
or
Room
NSB contact
from a central timer
SEQUENCE
Mode A (jumper not installed)
Output 1 analog in cooling mode
Output 2 on/off in heating mode
SETPOINT DIAL DEFINITION
HEATING
End
SETPOINT
Device
on
100%
50%
0%
OUTPUT 2
ON/OFF
Fig. 6. T7984B Sequence (Mode A)
DIP SWITCH SETTINGS
Mode input Changeover input
jumper
Mode A (Jumper out)
Mode B (Jumper in)
Remote
sensor input
(0 Vac)
NSB input
Fig. 5. T7984B Wiring
COOLING
SETPOINT
SETPOINT
CENTERED
IN ZERO
ENERGY BAND
Device
Device
closed
off
2 Vdc
OUTPUT 1
ANALOG
ZERO ENERGY BAND
Temperature increase
SETPOINT DIAL DEFINITION
DEFINITION S3 S4
75°F OVERRIDE 1 1
HEATING DIAL 0 1
1 0
COOLING DIAL
0 0
CENTERED HC
OUTPUT 2 ON/OFF CPH
CYCLES/HOUR S1
FAST 8 CPH 1
SLOW 4 CPH 0
ZERO ENERGY BAND
ZEB S2
ON = 1
5°F (3°C) 1
0
3°F (1.5°C)
OFF = 0
Fig. 8. T7984B Dip Switch Settings
T7984 A,B,C ELECTRONIC MODULATING CONTROL THERMOSTATS
Day/Night
for Out 1 mode (NSB)
X
* To enable mode B of operation, install a jumper across the
screw terminals and wire as shown
Output 2
On/off
Output 1
2-10 Vdc
Mode input
24 Vac
Power supply
(0 Vac)
Mode B (jumper installed)
Output 1 analog in heating mode
Output 2 on/off in cooling mode
End
Device
End
opened
Device
100% 10 Vdc
opened
10 Vdc
50%
0%
OUTPUT 1
Fig. 7. T7984B Sequence (Mode B)
DAY/NIGHT SETBACK
HEAT SETBACK
10°F (5°C)
5°F (3°C)
REMOTE SENSOR
MAIN SENSOR
LOCAL INTERNAL
REMOTE SENSOR
1 2 3 4 5 6
5
Remote sensor
option
X
2-10 Vdc valve or VAV
analog actuator
Input (2-10 Vdc)
24 Vac
Common
24 Vac Transformer
SETPOINT DIAL DEFINITION
HEATING
SETPOINT
SETPOINT
CENTERED
IN ZERO
ENERGY BAND
Device
Device
closed
off
2 Vdc
ANALOG
ZERO ENERGY BAND
Temperature increase
COOL SETUP S5
20°F (10°C)
1
5°F (3°C)
0
S6
1
0
75°F setpoint
limit
X
24 Vac on/off
relay or valve
R
COOLING
SETPOINT
End
Device
on
OUTPUT 2
ON/OFF
95C-10815–2