Trane Tracer AH540 Setup And Operation page 90

Chapter 5 Configuration
Table 48. Supply fan status ignore time configuration
Parameter
1
Fan status ignore time
1 This configuration property defines the maximum period of time the supply fan status binary input is ignored after the control
has started the supply fan.
Table 49. Face-and-bypass damper heat modulation setpoint configuration
Parameter
Heat modulation setpoint
Note: This parameter is only used when a face-and-bypass damper is present. When the outdoor air temperature is below this outdoor-
air-temperature setpoint, the face-and-bypass damper is used to modulate the hydronic heat capacity. When the outdoor air temperature
rises to 3°F (1.67°C) above this setpoint, the heat valve is used to modulate the hydronic heat capacity.
Table 50. Freeze avoidance setpoint configuration
Parameter
Freeze avoidance setpoint
1 A freeze avoidance setpoint value outside the valid range disables the freeze avoidance function.
2 This setpoint defines the outdoor air temperature with which the controller initiates the freeze avoidance function.
Table 51. Freeze avoidance valve configuration
Parameter
Time period
1
Duty cycle
2
Valve open position
1 Duty cycle is the percentage of the time period the steam valve is open.
2 The steam valve open position can be set to a partially open position to prevent excessive steam coil temperatures.
Table 52. Entering water temperature sampling configuration
Parameter
Time period between sampling cycles
Maximum sampling time
2
Ignore time
Valve position during sampling
1 The controller will sample the entering water temperature for this amount of time, after the ignore time.
2 The entering water will not be sampled until ignore time has expired, allowing the water valve time to open and establish flow.
80
14 to 122°F (-10 to 50°C)
32 to 122°F (0 to 50°C)
2
0 to 120 minutes
60 to 1440 minutes
90 to 3600 seconds
1
Valid range
0.0 to 6,553 seconds
Valid range
1
Valid range
Valid range
0 to 100%
0 to 100%
Valid range
0 to 30 seconds
0 to 100%
Default value
45 seconds
Default value
40°F (4.4°C)
Default value
35°F (1.67°C)
Default value
20 minutes
50%
50%
Default value
120 minutes
180 seconds
60 seconds
50%
CNT-SVX05B-EN