Trane UniTrane Installation, Operation And Maintenance Manual page 113

Table 57. 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
11 51.8 19028
12 53.6 18139
13 55.4 17297
14 57.2 16499
15 59 15743
16 60.8 15025
17 62.6 14345
18 64.4 13700
19 66.2 13087
20 68 12505
21 69.8 11953
22 71.6 11428
23 73.4 10929
24 75.2 10455
Zone Sensor
The controller accepts the following zone sensor module
inputs:
• Space temperature measurement (10kΩ thermistor)
• Local setpoint (either internal or external on the zone
sensor module)
• Fan switch
• Timed override (On) and Cancel timed override
• Communication jack
Space Temperature Measurement
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
UNT-SVX07J-EN
°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
36 96.8 6248
37 98.6 6006
38 100.4 5777
39 102.2 5559
40 104 5352
41 105.8 5156
42 107.6 4969
43 109.4 4791
44 111.2 4621
45 113 4460
46 114.8 4306
47 116.6 4160
48 118.4 4020
49 120.2 3886
°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
61 141.8 2397
62 143.6 2309
63 145.4 2225
64 147.2 2145
65 149 2070
66 150.8 1998
67 152.6 1929
68 154.4 1864
69 156.2 1802
70 158 1742
71 159.8 1686
72 161.6 1632
73 163.4 1580
74 165.2 1531
controller ignores the hard-wired space temperature input
and uses the communicated value.
External Setpoint Adjustment
Zone sensors with an external setpoint adjustment (1kΩ)
provide the controller with a local setpoint (50°F to 85°F or
10°C to 29.4°C). The external setpoint is exposed on the
zone sensor's front cover.
When the hard-wired setpoint adjustment is used to
determine the setpoints, all unit setpoints are calculated
based on the hard-wired setpoint value, the configured
setpoints, and the active mode of the controller. The hard-
wired setpoint is used with the controller's occupancy
mode (occupied, occupied standby, or unoccupied), the
heating or cooling mode, the temperature deadband
values, and the heating and cooling setpoints (high and
low limits) to determine the controller's active setpoint.
When a building automation system or other controller
communicates a setpoint to the controller, the controller
ignores the hard-wired setpoint input and uses the
communicated value. The exception is the unoccupied
Startup
°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
86 186.8 1041
87 188.6 1009
88 190.4 978
89 192.2 948
90 194 920
91 195.8 892
92 197.6 865
93 199.4 839
94 201.2 814
95 203 790
96 204.8 767
97 206.6 744
98 208.4 722
99 210.2 701
113