Startup
112
UNT-SVX07E-EN
Zone Sensor
The controller accepts the following zone sensor module
inputs:
•
Space temperature measurement (10k
Ω
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 10k
Ω
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
controller ignores the hard-wired space temperature input
and uses the communicated value.
External Setpoint Adjustment
Zone sensors with an external setpoint adjustment (1k
Ω
)
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
Table 57.
Zone Sensor Thermistor Curve (Resistance in Ohms)
°C
°F
R
°C
°F
R
°C
°F
R
°C
°F
R
0
32
32885
25
77
10004
50
122
3759
75
167
1484
1
33.8
31238
26
78.8
9557
1
123.8
3597
76
168.8
1436
2
35.6
29684
27
80.6
9135
52
125.6
3445
77
170.6
1389
3
37.4
28216
28
82.4
8737
53
127.4
3301
78
172.4
1345
4
39.2
26830
29
84.2
8362
54
129.2
3165
79
174.2
1302
5
41
25520
30
86
8007
55
131
3037
80
176
1260
6
42.8
24282
31
87.8
7672
56
132.8
2915
81
177.8
1220
7
44.6
23112
32
89.6
7355
57
134.6
2800
82
179.6
1182
8
46.4
22005
33
91.4
7056
58
136.4
2691
83
181.4
1145
9
48.2
20957
34
93.2
6772
59
138.2
2588
84
183.2
1109
10
50
19966
35
95
6503
60
140
2490
85
185
1074
11
51.8
19028
36
96.8
6248
61
141.8
2397
86
186.8
1041
12
53.6
18139
37
98.6
6006
62
143.6
2309
87
188.6
1009
13
55.4
17297
38
100.4
5777
63
145.4
2225
88
190.4
978
14
57.2
16499
39
102.2
5559
64
147.2
2145
89
192.2
948
15
59
15743
40
104
5352
65
149
2070
90
194
920
16
60.8
15025
41
105.8
5156
66
150.8
1998
91
195.8
892
17
62.6
14345
42
107.6
4969
67
152.6
1929
92
197.6
865
18
64.4
13700
43
109.4
4791
68
154.4
1864
93
199.4
839
19
66.2
13087
44
111.2
4621
69
156.2
1802
94
201.2
814
20
68
12505
45
113
4460
70
158
1742
95
203
790
21
69.8
11953
46
114.8
4306
71
159.8
1686
96
204.8
767
22
71.6
11428
47
116.6
4160
72
161.6
1632
97
206.6
744
23
73.4
10929
48
118.4
4020
73
163.4
1580
98
208.4
722
24
75.2
10455
49
120.2
3886
74
165.2
1531
99
210.2
701
