Trane VUV Installation, Operation And Maintenance Manual page 81

Table 31. Zone sensor thermistor curve (Resistance in Ohms) (continued)
°C °F R
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
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 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 mode,
when the controller always uses the stored default unoccupied
setpoints. After the controller completes all setpoint
calculations, based on the requested setpoint, the occupancy
mode, the heating and cooling mode, and other factors, the
UV-SVX005G-EN
°C °F R
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
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
calculated setpoint is validated against the following setpoint
limits:
• Heating setpoint high limit
• Heating setpoint low limit
• Cooling setpoint high limit
• Cooling setpoint low limit
These setpoint limits only apply to the occupied and occupied
standby heating and cooling setpoints. These setpoint limits do
not apply to the unoccupied heating and cooling setpoints
stored in the controller's configuration.
When the controller is in unoccupied mode, it always uses the
stored unoccupied heating and cooling setpoints.The unit can
also be configured to enable or disable the local (hard-wired)
setpoint. This parameter provides additional flexibility to allow
you to apply communicated, hard-wired, or default setpoints
without making physical changes to the unit.
Similar to hard-wired setpoints, the effective setpoint value for
a communicated setpoint is determined based on the stored
default setpoints (which determines the occupied and
occupied standby temperature deadbands) and the
controller's occupancy mode.
Fan Switch
The zone sensor fan switch provides the controller with an
occupied (and occupied standby) fan request signal (Off, Low,
Medium, High, Auto). If the fan control request is
communicated to the controller, the controller ignores the hard-
wired fan switch input and uses the communicated value. The
zone sensor fan switch input can be enabled or disabled
through configuration using the Rover service tool. If the zone
sensor switch is disabled, the controller resorts to its stored
Start-Up
°C °F R
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
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