Tracer® Uc400-B Controller; Analog Sensors; Zone Sensor - Trane BCHE Installation, Operation And Maintenance Manual

Start-Up
Heat and Cool Mode
In this mode, the thermostat can automatically turn on heat
or cool as needed. AUTO appears on display with heat set
point and cool set point.
Fan Mode
Only use auto fan mode. The fan speed is determined by
the number of degrees the room temperature differs from
the set point.
Testing the Thermostat
Once the thermostat is configured, it should be thoroughly
tested.
Note: If using pipe sensors, verify pipe sensor is within
range to output. Check pipe temperature by
pressing the UP and DOWN buttons simultaneously.
Heat Test (For systems with heat)
1. Press SYS button until heat mode is displayed.
2. Adjust the set temperature so it is 5 degrees above the
room temperature.
3. Heat should come on within a few seconds.
4. Adjust the set temperature 2 degrees below the room
temperature and the heat should turn off. There may be
a fan delay on your system.
Cool Test (For systems with cooling)
1. Press SYS (left) button until cool mode is displayed.
2. Adjust set temperature so it is 5 degrees below room
temperature.
3. Cooling should come on within a few seconds.
4. Adjust the set temperature 2 degrees above the room
temperature and the cool should turn off. There may be
a fan delay on your system.
Fan Test (System off)
Press FAN button to toggle between Fan Off, Fan Hi, Fan
Med or Fan Low.
Table 34. Zone sensor thermistor curve (Resistance in Ohms)
°C °F R
0 32 32885
1 33.8 31238
2 35.6 29684
3 37.4 28216
4 39.2 26830
5 41 25520
6 42.8 24282
7 44.6 23112
8 46.4 22005
9 48.2 20957
10 50 19966
104
°C °F R
25 77 10004
26 78.8 9557
27 80.6 9135
28 82.4 8737
29 84.2 8362
30 86 8007
31 87.8 7672
32 89.6 7355
33 91.4 7056
34 93.2 6772
35 95 6503
Tracer® UC400-B Controller
Tracer® UC400-B controller delivers single zone VAV
control in a stand-alone operation or as part of a building
automation system using BACnet® communications.

Analog Sensors

The zone sensor, entering water temperature sensor, and
the discharge air sensor, and the outside air temperature
sensor are 10 KΩ thermistors. See the following figure for
the resistance-temperature curve for these thermistors.
Figure 100. Resistance temperature curve for the
zone sensor, entering water temperature sensor, and
discharge air sensor

Zone Sensor

The controller accepts the following zone sensor module
inputs:
• Space temperature measurement (10kW thermistor)
• Local setpoint (either internal or external on the zone
sensor module)
• Fan switch
• Timed override (On) and Cancel timed override
• Communication jack
°C °F R
50 122 3759
1 123.8 3597
52 125.6 3445
53 127.4 3301
54 129.2 3165
55 131 3037
56 132.8 2915
57 134.6 2800
58 136.4 2691
59 138.2 2588
60 140 2490
°C °F R
75 167 1484
76 168.8 1436
77 170.6 1389
78 172.4 1345
79 174.2 1302
80 176 1260
81 177.8 1220
82 179.6 1182
83 181.4 1145
84 183.2 1109
85 185 1074
BCX-SVX002A-EN