- Cooling/heating mode status.
- Chiller-heater operating status.
- Chiller-heater standby status.
- Dilution cycle status.
- Burner operating status.
- General shutdown alarm output.
- External fault alarm output.
- Main fault alarm output.
- Burner flame failure alarm.
- External fault interlock (Additional control supplied by others).
- Earthquake switch shutdown.
- Remote temperature control 4.5˚F setup/setback.
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- Cooling water flow switch (FS2)
input (Flow switch supplied by
others).
- Freeze protection switch (IF1)
input for chilled/hot water (Temp. switch supplied by others).
- Freeze protection switch (IF2)
input for cooling water (Temp.
switch supplied by others).
- Exhaust fan control output.
- Exhaust fan interlock.
- Cooling tower sump level switch
(LS).
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