Honeywell T2798I2000 - HEAT;COOL CHANGEOVER; Output1 Application; WIRING DIAGRAM

Page 5 of 18 APHITEMPCON001-11-04
Heat / Cool Changeover of Output1
Output1 is suitable for Heat/Cool changeover (manually) control in 2pipe AHU, Zoning control or
Hydronic Heating application. Wiring connection is shown in fig.
With cooling or heating selected, the user set point (SP) will be positioned at the middle of
proportional band. The output percentage is proportional to the temperature measured and
decided by proportional band. The proportional band can be set from 2.0°C to 19.0°C. The
control logic is seen in Diagram 1.
Diagram 1:
Wiring Diagram
A/OD/I
Pt1000
sensor
1 2 3 4 5 6 7
PT1000
REMOTE SENSOR
2-10VDC /
4-20mA
Actuator
Unit
POWER
SUPPLY
110VAC /
230VAC
L
N
E
0VAC
0VAC
24VAC
24VAC
4 - 20 mA
2 - 10 VDC
8
Note: If Emergency IP [D/I] not used then
Add link between terminal No 5 & 3.
Proportional band
Cooling
Heating
50%
Valve Open
100%
Temperature Increase
Valve Close
0%
sp