EC AP MKT
Page 8
Confidential and Proprietary
Main Application
1. Two Pipe AHU
• Cooling/Heating changeover
– Setting point is positioned in the mid of
proportional band
– AO is proportional to the temperature
measured
– Changeover is adjusted by manual
• Emergency Interlock
– Under normal status, DI is closed. If
emergency happens, DI open. The
controller will reset all output, then cut
off the power.
– The controller only can be restarted by
manual operation
Opened
100%
0%
50%
Closed
Heating mode
Cooling mode
Temperature increase
Main Setting Temperature
AI
DI
AO
T
