Trane UniTrane Installation, Operation And Maintenance Manual page 105

Binary Inputs
BIP1: Low Temperature Detection Option
The factory hard wires the low temperature detection
sensor to binary input #1 (BIP1). The sensor defaults
normally closed (N.C.), and will trip off the unit on a low
temperature diagnostic when detecting low temperature.
In addition, the controller controls the unit devices below:
• Fan: Off
• Valves: Open
• Electric heat: Off
• Damper: Closed
BIP2: Condensate Overflow Detection Option
The factory hard wires the condensate overflow sensor to
binary input #2 (BIP2). The sensor defaults normally
closed (N.C.), and will trip off the unit on a condensate
overflow diagnostic if condensate reaches the trip point. In
addition, the controller controls the unit devices below:
• Fan: Off
• Valves: Closed
• Electric heat: Off
BIP3: Occupancy Sensor
Binary input #3 (BIP3) is available for field-wiring an
occupancy sensor, such as a binary switch or a timeclock,
to detect occupancy. The sensor can be either normally
open (N.O.) or normally closed (N.C.). Refer to
Table 44. Occupancy sensor state table
Sensor Type Sensor Position
Normally open Open
Normally open Closed
Normally closed Open
Normally closed Closed
Binary Outputs
Table below shows the six binary outputs.
Table 45. Binary outputs
Binary output Description
BOP1 Fan high speed
BOP2 Fan medium speed
BOP3 Fan low speed
1
BOP4 Main valve
1
BOP5 Auxiliary valve/electric heat
2
BOP6 2-position fresh air damper
1
In a four-pipe application, BOP4 is used for cooling and BOP5 is used
Note:
for heating. If no valves are ordered with the unit, the factory defaults
are:
- BOP4 configured as normally closed (N.C.)
- BOP5 configured as normally open (N.O.)
2
If the fresh air damper option is not ordered on the unit, BOP6 will
Note:
be configured as none.
®
Both Tracer ZN010 and ZN510 accept a maximum of five
analog inputs. See the table below.
UNT-SVX07J-EN
Table 44.
Unit Occupancy Mode
Occupied
Unoccupied
Unoccupied
Occupied
Pin
J1-1
J1-2
J1-4
J1-5
J1-6
J1-7
Table 46. Analog inputs
Analog
Input Description
Space
Zone
temperature
Set Local setpoint
Fan Fan mode input
Analog input 1 Entering water
(AI1) temperature
Analog input 2 Discharge air
(AI2) temperature
Notes: - Wall-mounted sensors include a thermistor soldered to the
sensor's circuit board
- Unit mounted sensors include a return air sensor in the unit's
return air stream.
Changeover units include an entering water temperature sensor.
The zone sensor, entering water temperature sensor, and
the discharge air temperature sensor are 10 KΩ
thermistors. See the figure below for the resistance-
temperature curve for these thermistors.
Figure 97. Resistance temperature curve for the zone
sensor, entering water temperature sensor,
and discharge air sensor
Zone Sensors
The available zone sensors (see
p. 91) provide up to three different inputs:
• Space temperature measurement (10 KΩ thermistor)
• Local setpoint
• 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
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
Refer to Table 47 for fan mode operation. The controller
will operate in either continuous fan or fan cycling mode.
The fan cycles when the fan mode switch is placed in auto.
Startup
Application
Space temperature detection /
timed override detection
Thumbwheel setpoint
Zone sensor fan switch
Entering water temperature
detection
Discharge air temperature
detection
"Zone Sensor Options, "
105