EC AP MKT
Page 9
Confidential and Proprietary
Main Application
Opened
Closed
100%
0%
50%
Output2: Heating
Output1: Cooling mode
Temperature increase
Heating setpoint Cooling setpoint
Zero energy band
Setpoint centered in zero energy band
2.Two pipe AHU
• Water cooling coil +electrical heating
(or Hot water heating coil) Sequence
Control
– Setpoint is located in the mid of Zero
Energy Band
– Heating is 2 position output
– Cooling is modulating control and
proportional to measured temperature
• 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
T
AI
DI
AO
DO
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