Trane Wired Temperature Sensors, Installation, Operation And Maintenance Manual

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BAS-SVX10C-EN 31
Maintenance and Troubleshooting
Table 1. Resistance measurements for zone temperature and setpoints
Zone or setpoint temperature
Nominal zone temperature
output resistance Nominal setpoint and heating
setpoint output resistance
** NA 938 Ω
55°F (12.8°C) 17.47 k Ω 792 Ω
60°F (15.6°C) 15.3 k Ω 695 Ω
65°F (18.3°C) 13.5 k Ω 597 Ω
70°F (21.1°C) 11.9 k Ω 500 Ω
75°F (23.9°C) 10.5 k Ω 403 Ω
80°F (26.7°C 9.3 k Ω 305 Ω
85°F (29.4°C) 8.25 k Ω 208 Ω
* NA 49 Ω
Notes:
1. Sensors are calibrated at 70°F (21.1ºC).
2. Single setpoint systems: Varies ±28
Ω
at 70°F (21.1ºC); varies ±128
Ω
at endpoints of scale 55ºF (12.8ºC) and 85ºF
(29.4ºC). Dual setpoint systems: Cooling setpoint varies ±10
Ω
at 70ºF (21.1ºC); varies at ±110
Ω
at endpoints of
scale. Heating setpoint varies ±20
Ω
at 70ºF (21.1ºC); varies at ±120
Ω
at endpoints of scale.
Table 2. Resistance measurements for fan and system modes
Fan mode System mode Nominal output resistance
Auto or invalid Emergency heat 35,000 Ω
Auto or invalid Heat 19,480 Ω
Auto or invalid Auto 7680 Ω
Auto or invalid Off 2320 Ω
Auto or invalid Cool 4870 Ω
On Emergency heat 43,450 Ω
On Heat 27,930 Ω
On Auto 16,130 Ω
On Off 10,770 Ω
On Cool 13,320 Ω
High Invalid (fan control only) 16,130 Ω
Med Invalid (fan control only) 13,320 Ω
Low Invalid (fan control only) 10,770 Ω
Auto Invalid (fan control only) 2320 Ω
Off Invalid (fan control only) 4870 Ω