Trane Tracer AH540 - Page 87

Configuration
CNT-SVX05B-EN 77
Table 38. Outdoor air damper configuration
Parameter Valid range Default value
Economizer control Enable or disable Enable or disable
Economizer temperature (dry bulb) 32°F to 122°F (0°C to 50°C) 50°F (10°C)
Occupied minimum position 0 to 100% 15%
Occupied standby minimum position
1
0 to 100% 10%
Low ambient lockout setpoint
2
-40°F to 32°F (-40°C to 0°C) -20°F (-28.9°C)
Ramp time
3
0–30 minutes 5 minutes
1 Occupied standby minimum damper position only applies to space temperature control operation.
2 This is the outdoor air temperature below which the outdoor air damper will always be closed.
3 Adjustable open time for the outdoor air damper to open from 0% to minimum position.
Table 39. DX cooling configuration
Parameter Valid range Default value
Ambient lockout setpoint
1
-40 to 122ºF (-40 to 50ºC) 50ºF (10ºC)
Discharge low limit setpoint
2
32 to 122ºF (0 to 15ºC) 45ºF (7.22ºC)
Coil defrost setpoint
3
20 to 40ºF (-6.67 to 4.44ºC) 30ºF (-1.11ºC)
Compressor minimum On timer 3 to 20 minutes 3 minutes
Compressor minimum Off timer 3 to 20 minutes 3 minutes
1 If outdoor air temperature is less than the compressor lockout temperature DX cooling is disabled.
2 If discharge air temperature is less than this setpoint the controller will start reducing DX cooling capacity.
3 When the universal analog input is configured for evaporator refrigerant temperature, and applied to the suction line of a
split DX system; if the evaporator refrigerant temperature is below the defrost setpoint the controller will reduce DX cooling
capacity.
Table 40. Dehumidification control configuration
Parameter Valid range Default value
Occupied space RH setpoint
1
0–100% 60%
Occupied space RH offset
2
0–10 0% 10%
Unoccupied space RH setpoint
1
0–100% 60%
Unoccupied space RH offset
2
0–10 0% 10%
Reheat stages allowed
3
0–6 stages 6
(all stages available)
1 Setting the occupied space RH setpoint to 0% disables occupied dehumidification con-
trol; likewise, setting the unoccupied space RH setpoint to 0% disables unoccupied
dehumidification control.
2 The space RH offset value is subtracted from the space RH setpoint to determine the
dehumidification control termination setpoint.
3 Number of electric heat stages allowed for dehumidification control.