This template is used to control a simple two-pipe air conditioning unit with return fan. The two operating modes it supports, heating in winter and cooling in summer, are selectable via "Winter_Summer Mode Select". Outside Air Damper Control generates outputs based on preset values, return air CO2 level and PID calculation, while Heating/Cooling Valve Control generates outputs based on return air temperature, temperature setpoint and PID calculation. Fault Alarm Protection includes individual sensor fault alarms, filter differential pressure switch and low limit temperature switch.
Legend | Description | Legend | Description |
|---|---|---|---|
OAT | Outside Air Temperature | SF | Supply Fan |
RAD | Return Air Damper | SAT | Supply Air Temperature |
OAD | Outside Air Damper | RAT | Return Air Temperature |
FILT | FILTER | RACO2 | Return Air CO2 |
LLT | Low Limit Temperature | R | Room |
VLV | Valve |