Trane RAUJ-C20 Installation, Operation And Maintenance Manual page 103

1. Turn the control circuit switch 1S2, in the unit
control panel, to the "OFF" position.
2. At the Master Energy Controller, disconnect wire
connected to Terminal T1. Use a digital ohmmeter
to measure resistance between Terminal T and the
wire removed from Terminal T1.
3. Use chart in Figure 72, p. 103
measured resistance to an equivalent temperature.
4. Measure the actual temperature at the sensor
location. If the measured resistance in step 2 is not
within ± 10.0 ohms of the actual temperature, the
Figure 72. 6RT1 discharge duct sensor "temperature vs resistance" curve
4800
4600
4400
4200
4000
3800
3600
3400
3200
3000
2800
2600
2400
2200
2000
1800
1600
55 60
(13) (16)
SS-SVX11K-EN
to convert the
3000 Ohms
@77°F (25°C)
65 70 75 80
(18) (21) (24) (27)
Temperature °F (°C)
6RT1 is out of range; replace it.
N N o o t t e e : : Before condemning the sensor, verify that
the connecting cable resistance is not
excessive. Refer to the "Field Installed
Control Wiring" section.
5. Make all necessary repairs and reconnect the duct
sensor lead to terminal T1 on the controller.
6. Turn switches 1S2, 5S1, & 5S2 to the "ON" position
to restore power to the control system.
85 90 95 100
(29) (32) (35) (38)
P P r r e e - - S S t t a a r r t t
105
(41)
103