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Control Operation - Honeywell T2798I2000 Manual

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CONTROL OPERATION

Input1 –Remote Temperature Sensor
The controller has an integral sensing device mounted internally. It is also possible to install a
remote room or duct return sensor at different locations. See wiring diagram.
Note#1: The remote sensor should be PT1000 (Refer Accessories)
Input2- Emergency Input
Input2 is to connect with an On/Off dry contact for system error or emergency interlock control. If
the contact is close, the controller will automatically close all output (or open to the maximum
position in reverse mode) and cut off the power. The controller can only be restarted manually.
Note#2: If you don't want to use the interlock function/emergency input please use a jumper wire
to connect input2 (terminal no.5) and neutral port (Terminal no.3), see wiring diagram.
Output1-Modulating Analog Output (2 to 10Vdc or 4 to 20mA)
Output1 is modulating P+I analog 2 to 10Vdc or 4 to 20mA. It can be selected by Selector
switch. The output signal is normal mode (2 to 10Vdc or 4 to 20mA) or reverse mode (10 to
2Vdc or 20 to 4mA) selectable.
Output2- On/Off digital Output (2A, 24Vac)
Output2 is digital output with 24VAC 2A Contact rating, nominal capacity. It provides On/Off
control for electric heater, on/off valve actuator or fan etc.
Output2 can provide limitation control through pre-setting a separate temperature limitation.
Page 4 of 18
APHITEMPCON001-11-04

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