Fan Operation During Occupied Heating; Valid Operating Range And Factory Default Setpoints; Local Fan Switch Enabled; Fan Operation In Heating And Cooling Modes - Trane BCHC Installation & Operation Manual

Fan Operation During Occupied Heating

Modes
The ZN520 fan output(s) normally run
continuously during the occupied and
occupied standby modes, but cycle
between high and off speeds with
heating/cooling during the unoccupied
mode. When in the occupied mode or
occupied standby mode and the fan
speed is set at the high or low position,
the fan runs continuously at the selected
speed. Refer to the Troubleshooting
section for more information on
abnormal fan operation.
36
Operation
Table O-SO-4. Fan Mode Operation, Tracer ZN010 and ZN510
Heating Mode
Fan Mode Occupied
Off off
Low low
High high
Auto
Continuous heat default
Cycling Off off/heat default
Notes:
1. During the transition from off to any fan speed but high, Tracer
speed and runs for one-half of a second before transitioning to the selected speed (if it is other than high). This
provides enough torque to start all fan motors from the off position.
2. When the heating output is controlled off, ZN010 and ZN510 automatically controls the fan on for an additional 30
seconds. This delay allows the fan to dissipate any residual heat from the heating source, such as electric heat.
3. Whenever two states are listed for the fan:
The first state (off) applies when there is not a call for heating or cooling.
The second state (varies) applies when there is a call for heating or cooling.
The heat default is factory configured for low fan speed, and the cool default is high.
Table O-SO-5. Valid Operating Range and Factory Default Setpoints, Tracer ZN010 & ZN510
Setpoint/Parameter
Unoccupied cooling setpoint
Occupied cooling setpoint
Occupied Heating setpoint
Unoccupied heating setpoint
Cooling setpoint high limit
Cooling setpoint low limit
Heating setpoint high limit
Heating setpoint low limit
Power up control wait
Table O-SO-6. Local Fan Switch Enabled
Communicated Fan Switch (Local)
Off Ignored
Low Ignored
High Ignored
Auto Off
Low
High
Auto
Table O-SO-7. Fan Operation in Heating and Cooling Modes
Heating
Fan mode Occ.
Off Off
Low Low
High High
Auto (continuous) Default
fan sp.
Sequence of
Operation
Cooling Mode
Unoccupied Occupied
off off
off/high (3) low
off/high (3) high
off/high (3) cool default
off/high (3) off/cool default
®
ZN010 and ZN510 automatically starts the fan on high
Default Setting Valid Operating Range
85° F 40 to 115° F
74° F 40 to 115° F
71° F 40 to 115° F
60° F 40 to 115° F
110° F 40 to 115° F
40° F 40 to 115° F
105° F 40 to 115° F
40° F 40 to 115° F
0 sec 0 to 240 sec
Fan Operation Fan Speed Input
Off
Low
High
Off
Low
High
Auto (configured default,
determined by heat/cool mode)
Cooling
Unocc. Occ.
Off Off
Off/High Low
Off/High High
Off/High Default
fan sp.
Unoccupied
off
off/high (3)
off/high (3)
off/high (3)
off/high (3)
Unocc.
Off
Off/High
Off/High
Off/High
BCXC-SVX01A-EN