Trane S*HF*20-75 Troubleshooting Manual page 89

Reference Enthalpy. Enable Air Econ
When OA Enthalpy is Below:
Note: This Setpoint is used when Comparative Enthalpy is not
installed or is invalid due to return air humidity or temperature is
out of range or failed.
• Press Next/Previous keys to navigate.
Default Econ Drybulb Enable Setpoint
Enable Economizer Below:
Note: This setpoint is used when Comparative Enthalpy is not
installed, or is invalid, and Drybulb is selected for alternate
economizer enable/disable decision.
• Press Next/Previous keys to navigate.
Supply Air Low Limit–Modulate Economizer
Toward Min Pos if SA Temp below:
• Press Next/Previous keys to navigate.
VCM Preheat ON If VCM Aux Temp Below
Ventilation Preheat Setpoint:
• Press Next/Previous keys to navigate.
Default Design Min CO
Default DCV Min CO
• Press Next/Previous keys to navigate.
Note: The following 2 screens are only shown if DCV is enabled.
RT-SVP07B-EN
25 BTU/LB
Setpt: 1000 PPM
2
Setpoint:
2
Used With: Units w/Economizer
Factory Presets: 25 BTU/LB
Possible Values: 19 to 28 BTU/LB
Used With: Units w/Economizer
Factory Presets: 75ºF
75°F
Possible Values: 50 to 140ºF
Used With: CVZT Units, or non-VVZT
Units Operating in Unoccupied
50°F
Economizer Cooling Mode
Factory Presets: 50ºF
Possible Values: 40 to 65ºF
Used With: Units w/Fresh Air
Measurement (VCM) w/DCV, or OA
35°F
Damper Min Position w/DCV, and Preheat
Enabled
Factory Presets: 35ºF
Possible Values: 35 to 75ºF
Used With: Units w/Fresh Air
Measurement (VCM) w/DCV, or OA
400 PPM
Damper Min Position w/DCV
Factory Presets:
Design Min CO
DCV Min CO
Possible Values:
Design Min CO
DCV Min CO
SETPOINT Menu
: 1000 PPM
2
: 400 PPM
2
: 150 to 2000 PPM
2
: 50-1900 PPM
2
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