Installation and Maintenance Manual

Startup
UNT-SVX07D-EN 91
Zone Sensors (Tracer ZN010 and ZN510)
The zone sensors available with the Tracer ZN010 and
ZN510 provide up to three different inputs
1. Space temperature measurement (10 KΩ thermistor)
2. Local setpoint
3. Fan mode switch
Wall-mounted zone sensors include a thermistor as a
component of the internal printed circuit board. Unit
mounted zone sensors use a sensor placed in the unit’s
return air stream.
Each zone sensor is equipped with a thumb wheel for
setpoint adjustment.
Fan Mode Switch (Tracer ZN010 and ZN510)
The zone sensor may be equipped with a fan mode switch.
The fan mode switch offers selections of off, low, medium,
high, or auto.
Supply Fan Operation (Tracer ZN010 and
ZN510)
Refer to Table 23 for fan mode operation. Tracer ZN010 and
ZN510 will operate in either continuous fan or fan cycling
mode. The fan cycles when the fan mode switch is placed
in auto. The fan runs continuous when placed in the high,
medium, or low position. Use Rover, Trane’s installation
and service tool, to change auto defaults.
Table 23. Fan mode operation
Heating Mode Cooling Mode
Fan mode Occupied Unoccupied Occupied Unoccupied
Off Off
Off Off Off
Low Low
Off/high
(a)
(a)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 cool-
ing.
The heat default is factory configured for low fan speed, and the cool
default is medium.
Low Off/high
(a)
Medium Medium Off/high
(a)
Medium Off/high
(a)
High High Off/high
(a)
High Off/high
(a)
Auto
Continuous Heat default Off/high
(a)
Cool default Off/high
(a)
Cycling off/heat default Off/high
(a)
Off/cool
default
Off/high
(a)
Notes:
1. During the transition from off to any fan speed but high, Tracer ZN010
and ZN510 automatically starts the fan on high speed and runs for
three seconds 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, Tracer 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.
Table 24. Valid operating range and factory default
setpoints
Setpoint/parameter Default Setting Valid Operating Range
Unoccupied cooling setpoint 85°F 40°F to 115°F
Occupied cooling setpoint 74°F 40°F to 115°F
Occupied heating setpoint 71°F 40°F to 115°F
Unoccupied heating
setpoint
60°F 40°F to 115°F
Cooling setpoint high limit 110°F 40°F to 115°F
Cooling setpoint low limit 40°F 40°F to 115°F
Heating setpoint high limit 105°F 40°F to 115°F
Heating setpoint low limit 40°F 40°F to 115°F
Power-up control wait 0 sec 0 sec to 240 sec
UNT-SVX07_-EN.book Page 91 Friday, April 27, 2012 9:40 AM