Trane Tracer ZN.520 Manual page 63

CNT-SVX04A-EN
Sequence of operation
Table 33 Fan configuration
Auto fan operation
Heating Continuous
Cooling Continuous
Additional flexibility built into the controller allows you to enable or disable the
local fan switch input. The fan mode request can be either hardwired or
communicated to the controller. When both are present, the communicated
request has priority over the hardwired input. Refer to Table 34 and Table 35.
Table 34 Local fan switch disabled or not present
Communicated fan speed input
Off
Low
Medium
High
Auto (or not present)
Table 35 Local fan switch enabled
Communicated Fan switch
fan speed input (local)
Off Ignored
Low Ignored
Medium Ignored
High Ignored
Auto Off
Low
Medium
High
Auto
Continuous fan operation
During occupied and occupied standby modes, the fan normally is on. For
multiple speed fan applications, the fan normally operates at the selected or
default speed (off, high, medium, low, auto). When fan mode is auto, the fan
operates at the default fan speed. See Table 36 on page 62 for fan operation
during heating and cooling operation for all occupancy modes.
Fan speed default
Off
Low
Medium
High
Auto
Off
Low
Medium
High
Auto
Fan operation
Off
Low
Medium
High
Auto (fan runs at the default speed)
Fan operation
Off
Low
Medium
High
Off
Low
Medium
High
Auto (configured default,
determined by heat/cool mode)
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