Carrier 69NT40-561-300, Operation And Service Manual

Page: 155 / 174

7–39 T-365
7.25.4 Sensors RRS and RTS Re-Installation
Reinstall the return sensor (Return Temperature Sensor RTS or Return Recorder Sensor RRS), as shown in Fig-
ure 7.25 . For proper placement of the return sensor, be sure to position the enlarged positioning section of the sen-
sor against the side of the mounting clamp.
Figure 7.25 Return Sensor Positioning
7.25.5 Sensor DTS Re-Installation
The Defrost Temperature Sensor (DTS) must have insulating material placed completely over the sensor to ensure
the coil metal temperature is sensed.
7.25.6 Sensors ETS1 and ETS2 Re-Installation
The Evaporator Temperature Sensors, ETS1 and ETS2 are located in a tube holder under insulation, as illustrated
in
Figure 7.26 . When the combo sensor is removed and reinstalled, it must be placed in a tube holder by applying
thermal grease. Insulating material must completely cover the sensor to ensure the correct temperature is sensed.
Figure 7.26 Evaporator Temperature Sensor Positioning
7.25.7 Sensor, CPDS Re-Installation
To replace the Compressor Discharge Temperature Sensor, see Figure 7.27 :
1. Ensure the unit is disconnected from the power source and that ST is in OFF position.
2. Remove the existing sensor. Clean all silicone sealer and dielectric compound from the sensor well. Ensure
well is clean and dry. The top of the compressor, where the sensor seals, must also be clean and dry.
1.50 in.
(38.1cm)
Mounting
Clamp
Return
Sensor
1.00 in.
(25.4cm)
Wire Tie
ETS1 and ETS2
ETS Tube Holder
Insulation