Installation and Maintenance Manual

Startup
UNT-SVX07D-EN 97
Binary Outputs (Tracer ZN520)
Binary outputs are configured to support the following:
• Three fan stages (when one or two fan stages are
present, medium fan speed can be configured as
exhaust fan)
• One hydronic cooling stage
• One hydronic heating stage (dehumidification requires
th
is to be in the reheat position)
• One DX cooling stage
• One or two-stage electric heat
(dehumidification
requires this to be in the reheat position)
• Face and bypass damper
• Modulating outdoor air damper
• One baseboard heat stage
For more information, see T
able 31, p. 97.
Zone Sensor (Tracer ZN520)
The Tracer ZN520 controller accepts the following zone
sensor module inputs:
• Space temperature measurement (10kΩ thermistor)
• Local setpoint (either internal or external on the zone
se
nsor module)
•Fan switch
• Timed override (On) and Cancel timed override
• Communication jack
Space Temperature Measurement (Tracer
ZN520)
Trane zone sensors use a 10kΩ thermistor to measure the
space temperature. Typically, zone sensors are wall-
mounted in the room and include a space temperature
thermistor. As an option, the zone sensor can be unit-
mounted with a separate space temperature thermistor
located in the unit’s return air stream. If both a hard-wired
and communicated space temperature value exist, the
Table 31. Binary output configuration (Tracer ZN520)
Binary
Output Configuration
J1-1 Fan high
J1-2 Fan medium
J1-3 Fan low
J1-4 (Key)
J1-5 Cool valve—open, or 2-position valve
(a)
(a)For Tracer ZN520 units configured and applied as 2-pipe hydronic heat/
cool changeover, terminals J1-5 and J1-6 are used to control the pri-
mary valve for both heating and cooling. For Tracer ZN520 units con-
figured and applied as 2-pipe hydronic heat/cool changeover with
electric heat, terminals J1-5 and J1-6 are used to control the primary
valve (for both cooling and heating), and terminals J1-9 and J1-10 are
used only for the electric heat stage. For those 2-pipe changeover units,
electric heat will not be energized while the hydronic supply is hot (5°
or more above the space temperature).
J1-6 Cool valve—close Note 1
J1-9
Heat valve—open, or 2 position valve, or 1st electric heat
stage
(a)
J1-10 Heat valve—close or 2nd Electric heat stage
(a)
J1-11 Fresh air damper—open
J1-12 Fresh air damper—close
TB4-1 Generic/baseboard heat output
TB4-2 24 Vac
Table 32. Analog inputs (Tracer ZN520)
Descripti
on
Termina
ls Function Range
Zone TB3-1 Space temperature
input
5°F to 122°F
Ground TB3-2 Analog ground NA
Set TB3-3 Setpoint input 40°F to 115°F
Fan B3-4 Fan switch input 4821 to 4919 W (off)
2297 to 2342 W (auto)
10593 to 10807 W (low)
13177 to 13443 W
(medium)
15137 to 16463 W (high)
Ground TB3-6 Analog ground NA
Analog
input 1
J3-1 Entering water
temperature
-40°F to 212°F
J3-2 Analog ground NA
Analog
input 2
J3-3 Discharge air
temperature
-40°F to 212°F
J3-4 Analog ground NA
Analog
input 3
J3-5 Fresh air temp/generic
temp
-40°F to 212°F
J3-6 Analog ground NA
Analog
input 4
J3-7 Universal input 0% to 100%
Generic 4–20mA 0% to 100%
Humidity 0 to 2000 ppm
CO
2
J3-8 Analog ground NA
G r o u n d J 3 - 9 A n a l o g g r o u n d N A
Notes:
1. The zone sensor, entering water temperature sensor, discharge air
sensor, and the outside air temperature sensor are 10KΩ thermistors.
2. Zone sensor: Wall-mounted sensors include a thermistor soldered to
the sensor’s circuit board. Unit mounted sensors include a return air
sensor in the units return air stream.
3. Changeover units include an entering water temperature sensor.
UNT-SVX07_-EN.book Page 97 Friday, April 27, 2012 9:40 AM