Supply Fan Vfd Bypass - Trane IntelliPak with Symbio 800 Programming Manual

TD7 Display
Table 17. Service settings (continued)
Value
Compressor Current Limit Compressor
Gain
Compressor Current Limit Integral
Time
Compressor Current Limit Activation
Band
Discharge Air Temp. Min. Cool Limit
Default
Discharge Air Temp. Max. Cool Limit
Default
Discharge Air Temp. Min. Heat Limit
Default
Discharge Air Temp. Max. Heat Limit
Default

Supply Fan VFD Bypass

Supply Fan VFD Bypass (if configured) allows fan operation when the VFD is not available (Supply
Fan Bypass mode operation is available whether a VFD is functional or not). This is accomplished
by interacting with the Supply Fan Bypass Mode Enabled button on the TD7 Display located under
Settings – Unit Settings – Service Settings screen. Refer to
bypass option is installed, the unit will include all of the necessary components and wiring to
bypass the VFD assembly(s) and allow the supply fan(s) to operate in full airflow modes. Supply
fan airflow proving/un-proving is important to insure the inertia of the fan has reduced enough to
avoid potential fan direction reversal due to component miss-wiring. Please see the Intellipak™
IOM for details concerning airflow proving.
Figure 36. Supply fan bypass mode enable button
52
Factory Default (Range)
2.000 (0.100-20.000)
60 Sec (1-600)
5.0% (2.0-10.0)
50 °F (40.0-80.0)
80.0 °F (50.0-80.0)
50 °F (40.0-120.0)
120 °F (50.0-140.0)
Description
Contact Trane Technical Support.
Contact Trane Technical Support.
Contact Trane Technical Support.
Minimum limit for the internal
discharge cooling setpoint calculation
single zone cooling.
Maximum limit for the internal
discharge cooling setpoint calculation
single zone cooling.
Minimum limit for the internal
discharge heating setpoint calculation
single zone heating.
Maximum limit for the internal
discharge heating setpoint calculation
single zone heating.
Figure 36, p. 52. Whenever this
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